Patent Publication Number: US-6910934-B2

Title: Method for manufacturing electron beam apparatus supporting member and electron beam apparatus supporting member and electron beam apparatus

Description:
This is a divisional application of application Ser. No. 09/512,266, filed on Feb. 24, 2000, now U.S. Pat. No. 6,485,345. 

   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a method for manufacturing an electron beam apparatus supporting member arranged in an airtight container in an electron beam apparatus having the airtight container in which an electronic source is contained, an electron beam apparatus supporting member manufactured by using the method, and an electron beam apparatus such as an image-forming apparatus having the electron beam apparatus supporting member. 
   2. Related Background Art 
   Conventionally there are known two types of electron-emitting devices; a hot-cathode device and a cold-cathode device. As the cold-cathode device among these, there are known a surface conduction electron-emitting device, a field emission device (hereinafter also referred to as an FE device), and a metal-insulator-metal emission device (hereinafter also referred to as an MIM device), for example. 
   The surface conduction electron-emitting device utilizes a phenomenon that electrons are emitted by flowing current on a thin film having a small area formed on a substrate, so as to be in parallel with its film surface. As the surface conduction electron-emitting device, there are known one with an SnO 2  thin film [M. I. Elinson, Radio Eng. Electron Phys., 10, 1290, (1965)], one with an Au thin film [G. Dittmer: “Thin Solid Films,” 9, 317 (1972)], one with In 2 O 3 /SnO 2  thin film [M. Hartwell and C. G. Fonstad: “IEEE Trans. ED Conf.,” 519 (1975)], and one with a carbon thin film [Hisashi Araki et al.: “Vacuum,” vol. 26, No. 1, 22 (1983)], for example. 
   As a typical example of a device configuration of these surface conduction electron-emitting devices,  FIG. 15  shows a plan view of a surface conduction electron-emitting device with an In 2 O 3 /SnO 2  thin film to M. Hartwell et al. as set forth in the above. In the surface conduction electron-emitting device with an In 2 O 3 /SnO 2  thin film, an electroconductive thin film  904  made of metallic oxide is formed in a sputtering process on a surface of an insulating substrate  901  as shown in FIG.  15 . The electroconductive thin film  904  is formed in an H-shaped plane as shown in FIG.  15 . The electroconductive thin film  904  is subjected to an energization operation called energization forming described later, by which an electron-emitting region  905  is formed in a central portion of the electroconductive thin film  904 . A gap L shown in  FIG. 15  is set to 0.5 to 1 mm and a width W of a region where there is formed the electron-emitting region  905  of the electroconductive thin film  904  is set to 0.1 mm. While the electron-emitting region  905  is represented by a rectangle in the center of the electroconductive thin film  904  in  FIG. 15 , a position and a shape of the electron-emitting region  905  are typical ones and they do not represent a position and a shape of an actual electron-emitting region  905  faithfully. 
   Giving an example of  FIG. 15  for a description in the above surface conduction electron-emitting devices including the device to M. Hartwell, generally the electroconductive thin film  904  is subjected to an energization operation called energization forming before an electron emission, by which the electron-emitting region  905  is formed on the electroconductive thin film  904 ,. The energization forming means that a constant dc voltage or a dc voltage increasing at a very slow rate of approx. 1 V/min or so, for example, is applied at both ends of the electroconductive thin film  904  for energizing in order to destruct, deform, or change in quality the electroconductive thin film  904  locally to form the electron-emitting region  905  having an electrically high resistance on the electroconductive thin film  904 . At this point, a fissure is generated in a part of the electroconductive thin film  904  locally destructed, deformed, or changed in quality. If a voltage is appropriately applied to the electroconductive thin film  904  after the above energization forming, an electron emission occurs in the vicinity of the fissure generated in the electroconductive thin film  904 . 
   In addition, as FE devices, there are known one described in “Field emission,” Advance in Electron Physics, 8, 89 (1956) to W. P. Dyke &amp; W. W. Dolan et al. or one described in “Physical properties of thin-film field emission cathodes with molybdenium cones,” J. Appl. Phys., 47, 5248 (1976) to C. A. Spindt et al. 
   As a typical example of the FE devices,  FIG. 16  shows a sectional view of a device to C. A. Spindt et al. as set forth in the above. In a conventional FE device, as shown in  FIG. 16 , emitter wiring  961  made of electroconductive materials is formed on a substrate  960  as shown in FIG.  16 . On the surface of the emitter wiring  961 , an emitter cone  962  and an insulating layer  963  are formed, respectively, and a gate electrode  964  is formed on a surface of the insulating layer  963 . This FE device emits an electric field from a tip portion of the emitter cone  962  by applying a voltage appropriately to a portion between the emitter cone  962  and the gate electrode  964 . 
   As another configuration of the FE device, there is a structure in which an emitter and a gate electrode are arranged on a substrate almost in parallel with a surface of the substrate instead of the laminated structure as shown in FIG.  16 . 
   As an MIM device, there is known one described in C. A. Mead, “Operation of tunnel-emission Devices,” J. Appl. Phys., 32, 646 (1961), for example. Referring to  FIG. 17 , there is shown a sectional view showing a typical example of the MIM device. In a conventional MIN device, as shown in  FIG. 17 , a lower electrode  971  made of a metal is formed on the substrate  970 . On a surface of the lower electrode  971 , a thin insulating layer  972  having a thickness of approx. 100 angstroms is formed on a surface of the lower electrode  971  and an upper electrode  973  made of a metal having a thickness of approx. 80 to 300 angstroms on a surface of the insulating layer  972 . In this type of the MIM device, a voltage is appropriately applied to a portion between the upper electrode  973  and the lower electrode  971 , by which electrons are emitted from a surface of the upper electrode  973 . 
   The above cold-cathode device is capable of achieving an electron emission at a lower temperature in comparison with the hot-cathode device, and therefore it does not need a thermal heater. Accordingly, the cold-cathode device has a configuration simpler than that of the hot-cathode device, by which it can be manufactured as a fine device. Additionally even if a lot of cold-cathode devices are arranged at a high density on the substrate, it does not easily have a problem such as heat fusion on the substrate. Furthermore, the cold-cathode device has an advantage of a rapid response contrary to the hot-cathode device whose response speed is relatively low since it is operated by heating with the heater. 
   Accordingly, research on applications of the cold-cathode device has been actively performed. 
   For example, the surface conduction electron-emitting device has a particularly simple configuration among cold-cathode devices and is easy to manufacture, thus having an advantage that a lot of devices can be formed over a large area. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 64-31332 to this applicant, for example, research has been done on a method for driving with arranging a lot of surface conduction electron-emitting devices. As for an application of an electron beam apparatus using this type of a surface conduction electron-emitting device, research has been done on image-forming apparatuses such as an image display and an image recording apparatus and charging beam sources, for example. 
   Particularly as an application of an electron beam apparatus to an image display, as disclosed in specifications of U.S. Pat. No. 5,066,883 to this applicant, Japanese Patent Application Laid-Open No. 2-257551, and Japanese Patent Application Laid-Open No. 4-28137, for example, research has been done on an image display using a surface conduction electron-emitting device combined with phosphor which emits light by means of irradiation of an electron beam from the surface conduction electron-emitting device. The image display using the surface conduction electron-emitting device combined with the phosphor is expected to have characteristics superior to those of other types of conventional image displays. Accordingly, the image display to which the electron beam apparatus is applied is superior in that it does not need a back light since it is of a self light emission type and in that it has a wide view angle, in comparison with liquid crystal display units which have been spreading in recent years, for example. 
   A method for driving with arranging a lot of FE type devices is disclosed in specifications of U.S. Pat. No. 4,904,895 to this applicant, for example. In addition, as an example of an application of an FE type device to an image display, there is known a flat panel display suggested by R. Meyer et al. [R. Meyer: “Recent Development on Micro-tips Display at LETI,” Tech. Digest of 4th Int. Vacuum Microelectronics Conf., Nagahama, pp. 6 to 9 (1991)], for example. 
   Furthermore, as an example of an application of a lot of arranged MIM-type devices to an image display, there is an image display disclosed in Japanese Unexamined Patent No. 3-55738 to this applicant, for example. 
   A flat panel display having a short depth is space-saving and light in weight among the above image-forming apparatuses to which the above electron beam apparatus having the electron-emitting device is applied, thereby drawing public attention as a display superseding a CRT display. 
   Referring to  FIG. 18 , there is shown a perspective view showing an example of a display panel portion in a conventional flat panel display to which the electron beam apparatus is applied, in which a part of the panel is illustrated in a cutaway view to show an internal structure of the display panel portion. 
   In the display panel portion in the conventional flat panel display, a substrate  911  is mounted on a surface of a rear plate  915  as shown in  FIG. 18. A  sidewall  916  is bonded to an edge portion of the surface of the rear plate  915  therealong. A face plate  917  opposite to the rear plate  915  is bonded to a surface of the sidewall  916  opposed to the rear plate  915 . The face plate  917 , the sidewall  916 , and the rear plate  915  form an airtight container (envelope)  931  of the display panel sealed to keep an inside of the display panel in a vacuum, with the face plate  917 , the sidewall  916 , and the rear plate  915  each forming a wall portion of the sealed container  931 . 
   On the substrate  911  fixed to the rear plate  915 , cold-cathode devices  912  are formed in a matrix by N×M. N and M are positive integers equal to or greater than 2 and values of N and M are appropriately set according to the target number of pixels of a display. The N×M of cold-cathode devices  912  are coupled to each other with row-directional wiring  913  of M wires and column-directional wiring  914  of N wires as shown in  FIG. 18. A  multiple electron beam source  932  comprises the substrate  911 , the cold-cathode devices  912 , the row-directional wiring  913 , and the column-directional wiring  914  in the above. In an at least intersecting portion of the row-directional wiring  913  and the column-directional wiring  914 , an insulating layer (not shown) is formed therebetween, so that the row-directional wiring  913  is kept to be electrically insulated from the column-directional wiring  914  in the intersecting portion. 
   A phosphor film  918  made of phosphor is formed on a lower surface of the face plate  917  in the rear plate  915  side, and the phosphor film  918  is made of phosphor materials having three primary colors; red (R), green (G), and blue (B) (not shown). In addition, a black material (not shown) is formed between the above colored phosphor materials forming the phosphor film  918  and a metal back  919  made of Al or the like is formed on a surface of the phosphor film  918  in the rear plate  915  side. This metal back  919  is used as a control electrode for controlling electrons emitted from the cold-cathode device  912 , and an accelerating voltage for affecting the electrons is applied to those so as to accelerate the electrons emitted from the cold-cathode devices  912 . 
   On the sidewall  916 , terminals Dx 1  to Dxm, Dy 1  to Dyn, and Hv for electrical connections in the airtight structure are mounted to connect electrically the row-directional wiring  913 , the column-directional wiring  914 , and the metal back  919  of the display panel to an electrical circuit which is not shown in an outside of the display panel. These terminals are protruding from the sidewall  916  to an outside of the airtight container  931 . The terminals Dx 1  to Dxm are electrically connected to the row-directional wiring  913  corresponding to the terminals Dx 1  to Dxm, respectively, the terminals Dy 1  to Dyn are electrically connected to the column-directional wiring  914  corresponding to the terminals Dx 1  to Dxm, respectively, and the terminal Hv is electrically connected to the metal back  919 . 
   The inside of the airtight container  931  is maintained in a vacuum of approx. 10 −6  Torr, and therefore, as a display area of the image display becomes larger, there occurs a need for means of preventing the rear plate  915  and the face plate  917  from being deformed or destroyed due to a difference between atmospheric pressures of the inside and the outside of the airtight container  931 . In using a method of increasing a thickness of the rear plate  915  and of the face plate  917  to prevent them from being deformed or destroyed, not only a weight of the image display is increased, but a distortion or a parallax error occurs when a display surface is viewed in an oblique direction. On the other hand, as shown in  FIG. 18 , there are provided spacers (also referred to as ribs)  920  as electron beam apparatus supporting members each made of a relatively thin glass plate for bearing an atmospheric pressure between the substrate  911  and the face plate  917 . The rear plate  915  and the face plate  917  are supported by the spacers  920 , by which a submillimeter to several millimeters of a gap is normally maintained between the substrate  911  composing a multiple electron beam source  932  and the face plate  917  on which the phosphor film  918  is formed and an inside of the airtight container  931  is kept in a high vacuum as described above. 
   When a voltage is applied to the cold-cathode devices  912  through the terminals Dx 1  to Dxm and Dy 1  to Dyn protruding outside the airtight container  931  in the image display having the above-described display panel, electrons are emitted from the respective cold-cathode devices  912 . Simultaneously with it, a high voltage of hundreds of volts to thousands of volts is applied to the metal back  919  through the terminal Hv to accelerate electrons emitted from the cold-cathode devices  912  so that the accelerated electrons collide with an inner surface of the face plate  917 . This excites phosphor materials having respective colors composing the phosphor film  918 , by which they emit lights to display an image on a display screen on the display panel. 
   On the display panel shown in  FIG. 18 , a part of electrons emitted from the cold-cathode devices  912  in the vicinity of the spacers  920  collide with the spacers  920  or ions ionized due to an effect of the emitted electrons adhere to the spacers  920 , by which static electrification may occur on the spacers  920 . If this static electrification occurs on the spacers  920 , a trajectory of the electrons emitted from the cold-cathode devices  912  is excessively curved and the electrons having the excessively curved trajectory reach positions different from normal positions on the phosphor of the phosphor film  918 , by which an image in the vicinity of the spacers  920  is distorted on the display disadvantageously. 
   If any of the spacers  920  moves off the original position due to an assembly error of the display panel at this point, a distance between the spacer  920  and the cold-cathode device  912  partially narrows and the difference of the electron trajectory is significantly increased. In this manner, the distortion of the image on the display screen is further extended by a positional difference of the spacer  920 , too. 
   In addition, a high voltage of hundreds of volts, in other words, 1 kV/mm or higher electric field is applied to a portion between the multiple electron beam source  932  and the face plate  917  to accelerate the electrons emitted from the cold-cathode devices  912 , by which a creeping discharge may occur on a surface of the spacer  920 . Particularly if the spacers  920  are charged as described above, discharging may be caused by the high voltage. 
   If any of the spacers  920  moves off the original position due to an assembly error of the display panel at this point, the distance between the spacer  920  and the cold-cathode device  912  partially narrows, too, which increases a probability of giving an extended damage on the cold-cathode devices  912  at discharging caused by static electrification of the spacers  920 , thus accelerating a deterioration of the cold-cathode devices  912  disadvantageously. 
   To solve these problems, there have been suggested methods for removing static electrification of the spacers  920  by flowing microcurrent through the spacers  920  in Japanese Patent Application Laid-Open No. 57-118355 and Japanese Patent Application Laid-Open No. 61-124031. In these methods in the official gazettes, a high resistance thin film is formed as an antistatic film on a surface of an insulating spacer substrate and is formed as a spacer comprising spacer electrodes put on the upper and lower surfaces of the spacer substrate, so that microcurrent flows uniformly over the surfaces of the spacer through the spacer electrodes. As for materials of the antistatic film, a tin oxide film, a mixed crystal thin film made of tin oxide and indium oxide, or a metal film is used. 
   Referring to  FIG. 19 , there is shown a flowchart for explaining a spacer manufacturing process according to a conventional technology. In the conventional spacer manufacturing process, a substrate is made first to form a spacer substrate by molding a base material made of the same component material as for the spacer substrate having a larger shape than one for the spacer substrate composing the spacer (S 11 ). Second, by cutting the substrate (S 12 ), the spacer substrate is cut off from the substrate to manufacture the spacer substrate. Next, a high resistance film is formed on a surface of the spacer substrate as an antistatic film (S 12 ), and further spacer electrodes are partially formed on the spacer substrate on which the high resistance film is formed (S 14 ), by which a spacer is manufactured having the high resistance film and the spacer electrodes formed on the spacer substrate. 
   There is such a problem, however, in forming a high resistance film or spacer electrodes on an insulating spacer substrate when manufacturing a spacer which is an electron beam apparatus supporting member that the number of processes is increased or a manufacturing process is complicated, which leads to an increase of a manufacturing time or of a manufacturing cost, thereby easily deteriorating a mass production property. 
   SUMMARY OF THE INVENTION 
   Therefore it is an object of the present invention to provide a method of manufacturing a supporting member for an electron beam apparatus free from unevenness in a shape or characteristics in a small number of simplified processes. 
   It is another object of the present invention to provide a method of manufacturing a supporting member for an electron beam apparatus in which the electron beam apparatus supporting member can be manufactured in a small number of simplified processes in a short manufacturing time at a low manufacturing cost so as to have a mass production property, a supporting member for an electron beam apparatus manufactured by using the method, and an electron beam apparatus having the electron beam apparatus supporting member. 
   According to one aspect, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus comprising an airtight container and an electron source and the supporting member arranged in the airtight container, including a step of heating and drawing a substrate of the supporting member, wherein an electroconductive film is formed on a surface of the substrate in the heating and drawing step. 
   According to another aspect, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of forming a formation member for forming the insulating member by molding with heating a base material comprising a component of the insulating member and forming at least one of the high resistance film and the electrode or a precursor of at least one of the high resistance film and the electrode on the formation member in a process in which the formation member cools down from a temperature at which the base material is heated to be molded. 
   According to still another aspect, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of forming a formation member for forming the insulating member by molding with heating a base material comprising a component of the insulating member, forming at least one of the high resistance film and the electrode on the formation member in a process in which the formation member cools down from a temperature at which the base material is heated to be molded, forming the other among the high resistance film and the electrode on the formation member in a process in which the formation member cools down from a temperature at which one of the high resistance film and the electrode is formed on the formation member, and manufacturing the electron beam apparatus supporting member by cutting the formation in which the high resistance film and the electrode are formed on the formation member. 
   According to a further aspect, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of forming a cylindrical formation member for forming the insulating member by molding with heating a base material comprising a component of the insulating member, forming the high resistance film on sidewalls of the formation member in a process in which the formation member cools down from a temperature at which the base material is heated to be molded, cutting the formation in which the high resistance film is formed on the formation member at a predetermined length to make the high resistance film formed on the insulating member, and forming the electrode on a cut surface of the insulating member and of the high resistance film. 
   According to a still further aspect, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of heating a base material comprising a component of the insulating member, forming a sheet formation member for forming the insulating member by pushing the heated base material for compression so that the base material has a predetermined thickness, forming the precursor of the high resistance film on face and rear surfaces of the sheet formation member in a process in which the sheet formation member cools down from a temperature at which the base material is compressed, forming the high resistance film on the face and rear surfaces of the sheet formation member by calcining the precursor of the high resistance film formed on the face and rear surfaces of the sheet formation member, cutting the high resistance film formed on the sheet formation member to make the high resistance film formed on the insulating member comprising the cut portion of the sheet formation member, and forming the electrode on a cut surface of the insulating member and of the high resistance film. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective diagram of a display panel of an image display of an embodiment according to the present invention; 
       FIG. 2  is a plan view of an enlarged part of a multiple electron beam source shown in  FIG. 1 ; 
       FIG. 3  is a cross-sectional view taken on line  3 — 3  of  FIG. 2 ; 
       FIG. 4  is a plan view illustrating a pattern of phosphor having three primary colors formed as a phosphor film shown in  FIG. 1 ; 
       FIG. 5  is a plan view illustrating an example of a deformed pattern of the phosphor of the phosphor film shown in  FIG. 1 ; 
       FIG. 6  is a cross-sectional view taken on line  6 — 6  of  FIG. 1 ; 
       FIG. 7  is a diagram typically showing an apparatus used for a method of manufacturing a supporting member for an electron beam apparatus of a first embodiment according to the present invention; 
       FIG. 8  is a diagram of assistance in explaining a process of forming a high resistance film in a spray head portion shown in  FIG. 7 ; 
       FIG. 9  is a diagram of assistance in explaining a process of forming a spacer electrode by using a transfer roller shown in  FIG. 7 ; 
       FIG. 10  is a diagram typically showing an apparatus used for a method of manufacturing a supporting member for an electron beam apparatus of a second embodiment according to the present invention; 
       FIGS. 11A and 11B  are diagrams of assistance in explaining a process of forming a high resistance film in a spray head portion shown in  FIG. 10 ; 
       FIG. 12  is a perspective diagram of a display panel of an image display configured by using spacers according to the manufacturing method explained on the basis of  FIGS. 10 ,  11 A and  11 B; 
       FIG. 13  is a diagram of assistance in explaining a method of manufacturing a supporting member for an electron beam apparatus of a third embodiment according to the present invention; 
       FIGS. 14A ,  14 B and  14 C are diagrams of manufacturing a supporting member for an electron beam apparatus of a fourth embodiment according to the present invention; 
       FIG. 15  is a plan view of a conventional surface conduction electron-emitting device; 
       FIG. 16  is a cross-sectional view illustrating an example of a conventional FE device; 
       FIG. 17  is a cross-sectional view illustrating an example of a conventional MIN device; 
       FIG. 18  is a perspective view illustrating an example of a display panel portion in a conventional flat panel display; and 
       FIG. 19  is a flowchart of assistance in explaining a spacer manufacturing process according to a conventional technology. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   The present invention relates to a method of manufacturing a supporting member for an electron beam apparatus comprising an airtight container, an electron source and the supporting member arranged in the airtight container, including a step of heating and drawing a substrate of the supporting member, wherein an electroconductive film is formed on a surface of the substrate in the heating and drawing step. 
   In addition, the method of manufacturing a supporting member for an electron beam apparatus is characterized by the electroconductive film formation including a step of coating the substrate with a solution including a component of the electroconductive film in the heating and drawing step. 
   Further, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of forming a formation member for forming the insulating member by molding with heating a base material comprising a component of the insulating member and forming at least one of the high resistance film and the electrode or a precursor of at least one of the high resistance film and the electrode on the formation member in a process in which the formation member cools down from a temperature at which the base material is heated to be molded. 
   The invention relates to a method of manufacturing a supporting member for an electron beam apparatus further comprising a step of manufacturing the supporting member for the electron beam apparatus in which at least one of the high resistance film and the electrode is formed on the insulating member comprising a cut portion of the formation member by cutting a formation in which at least one of the high resistance film and the electrode is formed on the formation member. 
   The invention relates to a method of manufacturing a supporting member for an electron beam apparatus, wherein the precursor is formed by coating the formation member with a solution in which at least one component of the high resistance film and the electrode is dispersed to a solvent and vaporizing the solvent by utilizing heat of the formation member so as to fix solute in the solution to the formation member when the precursor of at least one of the high resistance film and the electrode is formed on the formation member. In this condition, the method of manufacturing a supporting member for an electron beam apparatus further comprising the steps of forming at least one of the high resistance film and the electrode on the formation member by calcining the precursor and manufacturing the supporting member for the electron beam apparatus in which at least one of the high resistance film and the electrode is formed on the insulating member comprising a cut portion of the formation member by cutting a formation in which at least one of the high resistance film and the electrode is formed on the formation member. 
   Still further, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of forming a formation member for forming the insulating member by molding with heating a base material comprising a component of the insulating member, forming at least one of the high resistance film and the electrode on the formation member in a process in which the formation member cools down from a temperature at which the base material is heated to be molded, forming the other among the high resistance film and the electrode on the formation member in a process in which the formation member cools down from a temperature at which one of the high resistance film and the electrode is formed on the formation member, and manufacturing the supporting member for the electron beam apparatus by cutting the formation in which the high resistance film and the electrode are formed on the formation member. 
   Furthermore, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of forming a cylindrical formation member for forming the insulating member by molding with heating a base material comprising a component of the insulating member, forming the high resistance film on sidewalls of the formation member in a process in which the formation member cools down from a temperature at which the base material is heated to be molded, cutting the formation in which the high resistance film is formed on the formation member at a predetermined length to make the high resistance film formed on the insulating member, and forming the electrode on a cut surface of the insulating member and of the high resistance film. 
   According to a method of manufacturing a supporting member for an electron beam apparatus, it is preferable that the step of forming the formation member for forming the insulating member of the electron beam apparatus supporting member comprises the steps of preparing the stick base material comprising a component of the insulating member and extending unidirectionally having a sectional configuration similar to that of the formation member and a sectional area larger than that of the formation member, and heating a part of the base material in a longer direction to a temperature equal to or higher than a softening point of the base material with both ends of the base material supported and elongating the base material by pushing one end of the base material toward the part in the longer direction and by pulling the other end in the same direction as the direction of pushing the one end so as to form the formation member comprising the elongated portion of the base material. Otherwise, it is preferable that the step of forming the cylindrical formation member for forming the insulating member of the electron beam apparatus supporting member comprises forming the cylindrical formation member comprising a set-up portion of the base material by heating and melting the base material comprising the component of the insulating member inside a melting pot having a hole at its bottom and by setting up the base material flowing out of the hole of the melting pot. 
   Furthermore, the present invention relates to a method of manufacturing a supporting member for an electron beam apparatus containing an electron source having a plurality of electron-emitting devices and a control electrode for controlling electrons emitted from the electron-emitting devices, being arranged between the electron source and the control electrode so as to support wall portions of an airtight container whose inside is kept in an almost vacuum, and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, the manufacturing method comprising the steps of heating a base material comprising a component of the insulating member, forming a sheet formation member for forming the insulating member by pushing the heated base material for compression so that the base material has a predetermined thickness, forming a precursor of the high resistance film on face and rear surfaces of the sheet formation member in a process in which the sheet formation member cools down from a temperature at which the base material is compressed, forming the high resistance film on the face and rear surfaces of the sheet formation member by calcining the precursor of the high resistance film formed on the face and rear surfaces of the sheet formation member, cutting the formation in which the high resistance film is formed on the sheet formation member to make the high resistance film formed on the insulating member comprising a cut portion of the sheet formation member, and forming the electrode on a cut surface of the insulating member and of the high resistance film. 
   When the precursor of the high resistance film is formed on the sheet formation member, the precursor is formed by coating the sheet formation member with a solution in which a component of the high resistance film is dispersed to a solvent and vaporizing the solvent by utilizing heat of the sheet formation member so as to fix solute in the solution to the sheet formation member. 
   Further, when the high resistance film or the precursor of the high resistance film is formed on the formation member, it is preferable that the formation member is coated with the solution by spraying the solution including the component of the high resistance film on the formation member. In this condition, it is possible to use a plurality of injecting portions for spraying the solution when the solution including the component of the high resistance film is sprayed on the formation member. In addition, it is preferable that the formation member is coated with a solution including a component of the electrode by using a transfer roller when the electrode or the precursor of the electrode is formed on the formation member. 
   A supporting member for an electron beam apparatus is manufactured by using one of the above methods of manufacturing a supporting member for an electron beam apparatus. 
   Furthermore, an electron beam apparatus of the present invention includes the supporting member for the electron beam apparatus manufactured by using one of the above manufacturing methods as a supporting member for an electron beam apparatus. 
   The above electron beam apparatus may further comprise phosphor which emits light by being excited with irradiation of electrons emitted from the electron-emitting devices of the electron source in response to an input signal inputted to the electron source or an image-forming member in which an image is formed by the irradiation of the electrons emitted from the electron-emitting devices of the electron source. 
   In the above invention, first, with the formation of the electroconductive film on the surface of the substrate in the step of heating and drawing the substrate (base material) of the supporting member, in other words, with the formation of the electroconductive film on the surface of the substrate while it is drawn with heating, a heat at the heating and drawing can be utilized for the formation of the electroconductive film and further it is unnecessary to provide a step of molding a supporting member base from the substrate and a step of forming the electroconductive film on the molded supporting member base separately, thereby significantly reducing a process time for manufacturing a supporting member and providing a supporting member having less unevenness of a shape or characteristics. 
   This electroconductive film means a high resistance film or a low resistance film described later, and at least one of the resistance films is formed. 
   In the present invention as set forth in the above, in the cooling process of the formation member formed by heating and molding the base material comprising the component of the insulating member for manufacturing a supporting member for an electron beam apparatus being arranged in an airtight container for containing an electron source having a plurality of electron-emitting devices between the electron source and a control electrode so as to support wall portions of the airtight container and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, it is possible to use the heat generated when the formation member is formed with heating the base material to be molded by forming at least one of the high resistance film and the electrode or the precursor of at least one of the high resistance film and the electrode on the formation member. Specifically, in forming the high resistance film or the precursor thereof on the formation member, the formation member is coated with the solution including the component of the high resistance film, thereby utilizing the heat generated when the formation member is formed with heating and molding the base material as an amount of heat for drying the solution so as to supplement the amount of heat. In addition, in forming the electrode or the precursor thereof on the formation member, the formation member is coated with the solution including the component of the electrode, thereby utilizing the heat generated when the formation member is formed with heating and molding the base material as an amount of heat for drying the solution so as to supplement the amount of heat. Therefore, an efficiency of utilizing the heat in manufacturing the supporting member for the electron beam apparatus. Furthermore, the present invention reduces a time loss between a step of forming the formation member for forming the insulating member which is a component of the supporting member for the electron beam apparatus and a step of forming the high resistance film or the electrode on the formation member, thereby reducing a tact time of the manufacturing process, by which it is possible to achieve a method of manufacturing a supporting member for an electron beam apparatus having a high mass production property. 
   The following will describe the embodiments of present invention with reference to the drawings. 
     FIG. 1  is a perspective view of a display panel of an image display according to one embodiment of the present invention. The image display according to the present embodiment is implemented by adapting an electron beam apparatus having an electron-emitting device and has part of its display panel partially exploded in  FIG. 1  to show the internal construction of the display panel. 
   The image display panel of the display shown in  FIG. 1  has a substrate  111  mounted on a surface of a rear plate  115 . Along the edge of the rear plate  115  is joined a side wall  116 . On the surface of the rear plate  115  opposite the rear plate  115  is joined a face plate  117  opposing the rear plate  115 . The face plate  117 , the side wall  116 , and the rear plate  115  constitute an airtight container (envelope)  131  of the display panel which is sealed to maintain the interior of the display panel at a vacuum, serving as side walls of the airtight container  131  respectively. 
   A junction between the rear plate  115  and the side wall  116  and a junction between the side wall  116  and the face plate  117  are coated with flit glass and baked in an air or an atmosphere of such an inactive gas as argon or nitrogen at 400 to 500° C. for 10 minutes or more, to be bonded at their respective components, thus sealing the airtight container internally. The interior of the airtight container  131  is held at a vacuum level of 10 −6  Torr and, in order not to be destroyed by an atmospheric pressure or any accidental impact, has a spacer  120  as an electron beam apparatus supporting member which is obtained, as later-described with reference to  FIG. 6 , by forming on a insulating member a high-resistance film as a charge-preventing film and a low-resistance film as an electrode. 
   The substrate  111  attached to the rear plate  115  has thereon cold-cathode devices  112  in a matrix as many as N×M. Here N and M each is a positive integer of 2 or larger and appropriately set according to the number of display picture elements required on the display panel. In a display used with a high-definition TV, for example, preferably N is 300 or larger and M, 1000 or larger. The N×M number of cold-cathode devices  112  are wired in a simple matrix with an M number of row-directional wirings  113  and an N number of column-directional wirings  114 . The substrate  111 , the cold-cathode devices  112 , the row-directional wirings  113 , and the column-directional wirings  114  constitute a multi-electron-beam source  132 , which is housed inside the airtight container  131 . 
   The multi-electron-beam source  132  may be any electron source as far as it comprises a simple matrix having a plurality of cold-cathode devices and, also, there are no limitations to a method for manufacturing the cold-cathode devices  112 . Therefore, the cold-cathode device  112  may include, for example, a surface conduction electron-emitting device, a field-emission (FE) device, and a metal/insulating layer/metal-type emission device (MIM-type device). This embodiment employs a surface conducting electron-emitting device as the cold-cathode device  112 . 
   The following will describe a construction of the multi-electron beam source  132  in which a plurality of surface conducting electron-emitting devices are arrayed as the cold-cathode devices  112  on the surface of the substrate  111  and wired in a simple matrix, with reference to  FIGS. 2 and 3 . 
     FIG. 2  is a plan view of an expanded part of the multi-electron-beam source  132 . As shown in  FIG. 2 , on the substrate  111  the plurality of cold-cathode devices (surface conducting electron-emitting devices)  112  is arrayed and wired in a simple matrix consisting of the row-directional wirings  113  and the column-directional wirings  114 . At each intersection of the row-directional and column-directional wirings  113  and  114  is formed an inter-wiring insulating layer (not shown), where the row-directional and column-directional wirings are electrically insulated from each other. 
     FIG. 3  is a cross-sectional view taken along line  3 — 3  of FIG.  2 . As shown in  FIG. 3 , on the surface of the substrate  111  in the multi-electron-beam source  132 , a pair of device electrodes  141  and  142  are partially formed respectively. An electroconductive thin film  144  is formed on a part of the device electrode  141  towards the device electrode  142 , a part of a field of the substrate  111  between the device electrodes  141  and  142 , and a part of the device electrode  142  towards the device electrode  141 . A fissure portion formed at part of this electroconductive thin film  144  provides an electron-emitting region  145  for emitting electrons, which has a higher electrical resistivity than its surrounding electroconductive thin film  144 . This fissure which acts as the electron-emitting region  145  is formed by carrying out an energization forming operation on the electroconductive thin film  144 . Note here that in  FIG. 3  the electron-emitting region  145  is schematically shown because its actual position and the geometry cannot be illustrated precisely and accurately. To emit electrons from the electron-emitting region  145 , a voltage is applied to the electron-emitting region  145  via the pair of the device electrodes  141  and  142 . 
   A thin film around the electron-emitting region  145  is made of carbon or a carbon compound, covering the electron-emitting region  145  and its vicinity. The thin film  143  is formed by carrying out an energization activation operation after an energization forming operation. Note here that in  FIG. 3  the thin film  143  is schematically shown because its actual position and geometry cannot be illustrated precisely and accurately. The electron-emitting region  145  and a part of the electroconductive thin film  144  covered with the thin film  143  and the device electrodes  141  and  142  constitute the cold-cathode device  112 . 
   To manufacture the multi-electron-beam source  132  having such a configuration as mentioned above, it is necessary to beforehand form the row-directional and column directional wirings  113  and  114 , the inter-electrode insulating layer (not shown), the device electrodes  141  and  142 , and the electroconductive thin film  144  on the substrate  111 . Next, each cold-cathode device  112  is supplied with electricity via the row-directional and column-directional wirings  113  and  114 , to carry out necessary operations such as an energization forming operation and an energization activation operation, thus manufacturing the multi-electron-beam source  132 . Although this embodiment has employed such a configuration that on the read plate  115  of the airtight container  131  is attached the substrate  111  of the multi-electron-beam source  132 , the substrate  111  itself of the multi-electron-beam source  132  may be used as the rear plate of the airtight container  131  as far as it has sufficient strength. 
   Also, as shown in  FIG. 1 , on the back side of the face plate  117  facing the rear plate  115  is formed a phosphoric film  118 . Since an image display according to this embodiment is a color display, the phosphoric film  118  is comprised of three-primary colors of red (R), green (G), and blue (B) used on a Braun tube (CRT) which is painted respectively. 
     FIG. 4  is a plan view showing a pattern of three-primary-color phosphors formed as the phosphoric film  118 .  FIG. 5  is a plan view showing a variation of the pattern of the phosphors of the phosphoric film  118 . These colors of the phosphors of the phosphoric film  118  are, as shown for example in  FIG. 4 , painted in stripes separately from each other, in such a configuration that thus formed stripe-shaped phosphors have an electroconductive black material  151   a  formed therebetween. The electroconductive black material  151   a  is provided in order to preclude any shifts in colors displayed on the display surface even if an electron beam is shifted to some extent on the phosphoric film  118 , to prevent deterioration in the display contrast by precluding reflection of external lights, and to prevent charge-up of the phosphoric film  118  by electron beams. Although the above-mentioned electroconductive black material has used graphite as its main component, any other material may be used as far as it fits the above-mentioned purposes. 
   Also, the above-mentioned respective painting of the three primary colors of the phosphoric film  118  is not limited to a stripe-shaped array shown in  FIG. 4  but may come in a delta-shaped one shown in  FIG. 5  etc. In the pattern of phosphors shown in  FIG. 5  also, an electroconductive material  151   b  is formed between the phosphors based on an array of these phosphors. The purposes of forming and the materials of the electroconductive black material  151   b  are the same as those for the electroconductive black material  151   a . Note here that to fabricate a monochromatic display panel, a single-color phosphoric material may be used as the phosphoric film  118  and also that the electroconductive black materials  151   a  and  151   b  need not always be formed. 
   On the surface of the phosphoric film  118  facing the rear plate  115  is formed a metal back  119  made of aluminum which is publicly known in an application field of CRTs. The metal back  119  is thus formed in order to improve optical utilization efficiency by reflecting part of a light emitted from the phosphoric film  118 , to protect the phosphoric film  118  from attacks of negative ions, to cause itself to act as an electrode to which voltage is applied for accelerating an electron beam, and to excite the phosphoric film  118  so as to cause it to act as a conducting path for electrons. Therefore, the metal back  119  is used also as a control electrode for controlling electrons emitted from the cold-cathode device  112  in such a manner as to apply voltage on and accelerate electrons emitted from the cold-cathode device  112 . The metal back  119  is formed by forming the phosphoric film  118  on the face plate  117  and then smoothing the surface of the phosphoric film  118  to evaporate aluminum in vacuum on the surface of the phosphoric film  118 . Note here that the metal back  119  is not used when a low-voltage-application phosphoric material is used as the material of the phosphoric film  118  or when the acceleration voltage is low or also when a higher brightness can be obtained without the metal back  119 . 
   Although it is not used in the image display according to this embodiment, a transparent electrode made of for example ITO may be used between the face plate  117  and the phosphoric film  118  in order to apply acceleration voltage or to improve conductivity of the phosphoric film  118 . 
     FIG. 6  is a cross-sectional view taken along line  6 — 6  of FIG.  1 . As shown in  FIG. 6 , the space  120 , which acts as an electron beam apparatus supporting member, is obtained by forming a high-resistance film  11  on the whole surfaces of two sides which provide a surface having a maximum area on an insulating substrate  1  as an insulating material which constitutes the spacer  120  and then forming a low-resistance film  21   a  as one spacer electrode on one end surface  3   a  of the insulating substrate  1  facing the face plate  117  and another low-resistance film  21   b  as the other spacer electrode on the other end surface  3   b  of the insulating substrate facing the rear plate  115 . The material of the insulating substrate  1  may include glass or glass fiber. The respective high-resistance films  11  are formed in order to prevent the spacer  120  surface from being charged, coming in contact with the low-resistance films  21   a  and  21  to be electrically connected with them. 
   Thus obtained spacer  120  is arranged between the multi-electron-beam source  132  and the metal back  119  in the airtight container  131  at such an interval and as many a number that are required to support the rear plate  115  and the face plate  117  against the atmospheric pressure. A joining material  146   a  is provided to attach the low-resistance film  21   a  to the metal back  119  which provides the inner side of the faceplate  117 , while a joining material  146   b  is provided to attach the low-resistance film  21   b  onto the substrate  111 . Note here that the low-resistance film  21   b  is arranged on the surface of the row-directional array  113 . 
   The low-resistance film  11  is electrically connected via the low-resistance film  21   a  and the joining material  146   a  to the inside of the face plate  117  of for example the metal back  119  and also to the row-directional or column-directional wiring  113  or  114  on the surface of the substrate  111  via the low-resistance film  21   b  and the joining material  146   b . In this embodiment, the spacers  120  are shaped into a thin plate and arranged in parallel with the row-directional wirings  113 , to be electrically connected with them. 
   The spacer  120  must have a dielectric strength high enough to stand a high voltage applied between the metal back  119   b  and the row-directional and column-directional wirings  113  and  114 . The material of the insulating substrate which constitutes the spacer  120  is not limited to the above-mentioned materials but may include glass with reduced contents of impurities such as Na, soda lime glass, and ceramic such as alumina. The insulating substrate  1  preferably has a thermal expansion rate which is near that of members which constitute the airtight container  131  and the substrate  111 . 
   Through the high-resistance film  11  which constitutes the spacer  120  flows a current that is obtained by dividing an acceleration voltage value Va applied to the metal back  119  or the face plate  117  of the high-voltage side by a resistance value Rs of the high-resistance film  11  which provides charge-preventing film. Therefore, the resistance Rs for the spacer  120  is set in such a preferable range as to prevent charging and reduce power dissipation. From a viewpoint of preventing charging, a sheet resistance R of the high-resistance film  11  is preferably 10 12  Ω/□ or less. To further improve the effects of preventing charging, the sheet resistance R of the high-resistance film  11  should preferably be 10 11  Ω/□ or less. The lower limit of the sheet resistance of the high-resistance film  11  is preferably 10 5  Ω/□, depending on a voltage applied between the adjacent spacers  120 . From the viewpoint of the above, the sheet resistance of the high-resistance film  11  should preferably be 10 9  to 10 14  Ω/□. 
   A thickness t of the high-resistance film  11  which acts as a charging-preventing film formed on the surface of the insulating substrate  1  is preferably 10 nm to 1 μm. The thickness t of the high-resistance film  11  depends on the surface energy of the component materials, the adhesion between the high-resistance film  11  and the insulating substrate  1 , and the temperature of the insulating substrate  1  but if it is 10 nm or less, generally the film  11  is formed in an island shape having such an electrical resistance that is unstable and poor in reproducibility. When the thickness t is 1 μm or more, on the other hand, it has a larger film stress and is more likely to be delaminated and have poorer mass-productivity because of elongated time required for forming films. Therefore, the film thickness of the high-resistance film  11  is preferably 50 to 500 nm. Supposing the specific resistance of the high-resistance film  11  to be ρ and its film thickness to be t, the sheet resistance of the high-resistance film  11  is ρ/t, so that the specific resistance ρ of the high-resistance film  11  is preferably 0.1 to 10 8  Ωcm based on the above-mentioned preferable range of the sheet resistance R and the film thickness t. To realize better ranges for the sheet resistance and film thickness of the high-resistance film  11 , the specific resistance ρ is preferably 10 2  to 10 6  Ωcm. 
   In the spacer  120 , when a current flows through the high resistance film  11  formed on the surface of the insulating substrate  1  as described above, or the entire display panel generates heat during operation, the temperature of the spacer  120  rises. Here, when the resistance temperature coefficient of the high resistance film  11  has a large negative value, and when the temperature of the spacer  120  rises, the resistance value of the high resistance film  11  decreases, and the current flowing through the spacer  120  increases, which further raises the temperature of the spacer  120 . In this case, the current flowing through the spacer  120  continues to increase until the limit of the power supply is exceeded. The value of the resistance temperature coefficient at which the runaway of the current is caused in the spacer  120  in this manner is empirically a negative value, and the value is −1%/° C. or less. Specifically, the resistance temperature coefficient of the high resistance film  11  is preferably more than −1%/° C. 
   As the material of the high resistance film  11  having a charging preventive property in the spacer  120 , for example, metal oxides can be used. Among the metal oxides, oxide of chromium, nickel, or copper is a preferable material. The reason is that this oxide has a relatively small secondary electron-emitting efficiency, and it is supposed that even when the electron emitted from the cold cathode device  112  strikes the spacer  120 , the spacer  120  is difficult to charge. Besides the above-described metal oxides, carbon is preferable as the material of the high resistance film  11  because of its small secondary electron-emitting efficiency. Particularly, since non-crystalline carbon has a high resistance, the resistance value of the spacer  120  can easily be controlled to provide a desired value by using non-crystalline carbon as the material of the high resistance film  11 . 
   As another material of the high resistance film  11  provided with the charging preventing property, nitride of aluminum and transition metal alloy is a preferable material because the resistance value can be controlled in a broad range to an insulating material from a good conductive material by adjusting the composition of the transition metal. Moreover, the nitride of aluminum and transition metal alloy indicates only a small resistance value change and is a stable material in the manufacture process of the display described later. Furthermore, the resistance temperature coefficient of nitride is more than −1%/° C., and the nitride of aluminum and transition metal alloy is practically easily usable material. Examples of transition metal elements include Ti, Cr, Ta, and the like. 
   The alloy nitride film formed as the high resistance film  11  is formed on the surface of the insulating substrate  1  by thin film formation processes such as sputtering, reactive sputtering in a nitrogen gas atmosphere, electron beam deposition, ion plating, and ion assist deposition process. A metal oxide film can also be formed in the similar thin film formation process, but in this case, an oxygen gas is used instead of a nitrogen gas. Additionally, a metal oxide film can also be formed as the high resistance film  11  by a CVD process, or an alkoxide application process. When a carbon film is formed as the high resistance film  11 , the carbon film is formed by the deposition process, sputtering process, CVD process, or plasma CVD process. Particularly when a non-crystalline carbon film is formed, hydrogen is contained in a film formation atmosphere, or a hydrocarbon gas is used as the film formation gas. 
   The low resistance films  21   a ,  21   b  constituting the spacer  120  are formed to electrically connect the high resistance film  11  to face plate  117  (metal back  119 , and the like) on a high potential side and substrate  111  (row-directional wiring  113 , column-directional wiring  114 , and the like) on a low potential side, and these low resistance films  21   a ,  21   b  form the electrodes of the spacer  120  (hereinafter also referred to as the spacer electrodes). Each of the low resistance films  21   a ,  21   b  as the spacer electrodes can be provided with the following three functions. 
   First, as the first function given to the low resistance films  21   a ,  21   b  as the spacer electrodes, for example, the high resistance film  11  is electrically connected to the face plate  117  and the substrate  111  by the low resistance films  21   a ,  21   b.    
   As described above, the high resistance film  11  is formed for the purpose of preventing the charging on the surface of the spacer  120 , but when the high resistance film  11  is connected to the face plate  117  (metal back  119 , and the like) and substrate  111  (row-directional wiring  113 , column-directional wiring  114 , and the like) directly or via connecting members  146   a ,  146   b , a large contact resistance is generated in a connected portion interface, and there is a possibility that electric charges generated on the surface of the spacer  120  cannot quickly be removed. To avoid this, the low resistance films  21   a ,  21   b  are formed on the spacer  120 , and the contact portions of the spacer  120  with the face plate  117 , substrate  111  and connecting members  146   a ,  146   b  are formed by the low resistance films  21   a ,  21   b  as the low-resistance spacer electrodes. 
   Subsequently, as the second function given to the low resistance films  21   a ,  21   b  as the spacer electrodes, the potential distribution of the high resistance film  11  is uniformed. The electron emitted from the cold cathode device  112  constitutes an electron trajectory according to the potential distribution formed between the face plate  117  and the substrate  111 . In order to prevent turbulence from occurring in the electron trajectory in the vicinity of the spacer  120 , the potential distribution of the high resistance film  11  needs to be controlled over the entire area of the film. When the high resistance film  11  is connected to the face plate  117  (metal back  119 , and the like) and substrate  111  (row-directional wiring  113 , column-directional wiring  114 , and the like) directly or via the connecting members  146   a ,  146   b , nonuniformity is generated in the connected state because of the contact resistance of the connected portion interface, and the potential distribution of the high resistance film  11  possibly deviates from the desired value. To avoid this, by forming the low resistance films  21   a ,  21   b  as the low-resistance spacer electrodes on the entire area of the surfaces of the spacer ends of the spacer  120  abutting on the face plate  117  and substrate  111  (end surfaces  3   a ,  3   b  and side surfaces  5   a ,  5   b ), and applying a desired potential to the spacer electrode portion, the potential of the entire high resistance film  11  can be controlled. 
   Furthermore, as the third function given to the low resistance films  21   a ,  21   b  as the spacer electrodes, the trajectory of the electron emitted from the cold cathode device  112  is controlled. The electron emitted from the cold cathode device  112  constitutes the electron trajectory according to the potential distribution between the face plate  117  and the substrate  111 . For the electron emitted from the cold cathode device  112  in the vicinity of the spacer  120 , there are restrictions (such as the change of the position of the cold cathode device  112  or the device wiring) with the installation of the spacer  120  in some cases. In this case, in order to form an image without any strain or nonuniformity, the trajectory of the electron emitted from the cold cathode device  112  needs to be controlled to irradiate the desired position on the face plate  117  with the electron. By forming the low resistance films  21   a ,  21   b  as the low-resistance spacer electrodes on the side faces  5  of the abutment portions of the spacer  120  abutting on the face plate  117  and substrate  111 , and providing the potential distribution in the vicinity of the spacer  120  with the desired property, the trajectory of the emitted electron can be controlled. 
   As the materials of the low resistance films  21   a ,  21   b , materials having resistance values sufficiently lower than the value of the high resistance film  11  may be selected, and metals such as Ni, Cr, Au, Mo, W, Pt, Ti, Al, Cu, and Pd, or alloys may be used. Furthermore, the material is appropriately selected from: a printing conductor formed of metals such as Pd, Ag, and Au, metal oxides such as RuO., and Ag—PdO, glass, and the like; a conductive fine particle dispersed film in which conductive fine particles obtained by doping fine particles of semiconductor materials such as SnO 2  with dopants such as Sb are dispersed in an inorganic or organic binder; and semiconductor materials such as In 2 O 3 —SnO 2  and other transparent conductors and polysilicon. 
   The connecting members  146   a ,  146   b  need to be provided with electroconductive properties so that the spacer  120  is electrically connected to the row-directional wiring  113  and metal back  119 . Therefore, as the materials of the connecting members  146   a ,  146   b , conductive adhesive materials, metal particles, fritted glass with a conductive filler added thereto, and the like are preferable. 
   Moreover, attached to side wall  116  are airtight structure electric connecting terminals Dx 1  to Dxm, Dy 1  to Dyn and Hv for electrically connecting the row-directional wiring  113 , column-directional wiring  114  and metal back  119  of the display panel to an electric circuit (not shown) outside the display panel. These terminals are protruded to the outside of airtight container  131  from the side wall  116 . Each of the terminals Dx 1  to Dxm is electrically connected to the row-directional wiring  113  corresponding to each of the terminals Dx 1  to Dxm, each of the terminals Dy 1  to Dyn is electrically connected to the column-directional wiring  114  corresponding to each of the terminals Dy 1  to Dyn, and the terminal Hv is electrically connected to the metal back  119 . 
   In order to exhaust air from the airtight container  131  to obtain a vacuum state inside the container, after assembling the airtight container  131 , an exhaust tube and vacuum pump (not shown) disposed in the airtight container  131  are connected, and the vacuum pump is driven to exhaust the air from the airtight container  131  until a vacuum degree of about 10 −7  Torr is obtained. subsequently, the exhaust tube of the airtight container  131  is sealed, but to maintain the vacuum degree inside the airtight container  131 , a getter film (not shown) is formed on a predetermined position in the airtight container  131  immediately before and after the sealing. The getter film is deposited and formed by heating the getter material mainly containing, for example, Ba with a heater or by high-frequency heating, and the pressure inside the airtight container  131  is maintained to provide the vacuum degree of 1×10 −5  to 1×10 −7  Torr by the adsorption action of the getter film. 
   In the image display using the above-described display panel, when the voltage is applied to the cold cathode devices  112  via the outwardly protruded terminals Dx 1  to Dxm, Dy 1  to Dyn of the airtight container  131 , electrons are emitted from the cold cathode devices  112 . At the same time, by applying a high pressure of several hundreds of volts to several kilovolts to the metal back  119  via the terminal Hv outside the container, and accelerating the electrons emitted from the cold cathode devices  112 , the accelerated electrons are allowed to strike the inner surface of the face plate  117 . Thereby, each color phosphor constituting fluorescent film  118  is excited to emit light, and the image is displayed on the display surface of the display panel. 
   Usually, the voltage applied to the surface conduction electron-emitting device used as the cold cathode device  112  in the present embodiment is of the order of 12 to 16 V, distance d between the metal back  119  and the cold cathode device  112  is of the order of 0.1 to 8 mm, and a voltage between the metal back  119  and the cold cathode device  112  is of the order of 0.1 to 10 kV. 
   A method of manufacturing the spacer  120  will next be described as a method of manufacturing a supporting member for an electron beam apparatus with reference to  FIGS. 1 and 6 . 
   In the method of manufacturing the spacer  120 , by heating and molding/processing a base material formed of materials constituting the insulating substrate  1 , a formation member for forming the insulating substrate  1  is formed. Subsequently, in the process of cooling the formation member to an atmospheric temperature around the formation member, by forming the high resistance film  11 , low resistance film  21   a ,  21   b , or a precursor of the high resistance film  11  or low resistance film  21   a ,  21   b  on the formation member, the heat during formation of the formation member by heating and molding/processing the base material is utilized in forming the high resistance film  11 , electrode  21   a ,  21   b , or the precursor thereof. 
   Specifically, during the forming of the high resistance film  11 , or the precursor of the high resistance film  11  on the formation member, by applying a solution containing the materials constituting the high resistance film  11  to the formation member, the heat during the forming of the formation member by heating and molding/processing the base material is utilized as the amount of heat for drying the solution, and a part of the heat amount is compensated. Moreover, when the low resistance films  21   a ,  21   b , or the precursors of the low resistance films  21   a ,  21   b  are formed on the formation member, by applying the solution containing the materials constituting the low resistance films  21   a ,  21   b  to the formation member, the heat during the forming of the formation member by heating and molding/processing the base material is utilized as the amount of heat for drying the solution, and a part of the heat amount is compensated. 
   Subsequently, by cutting the formation member with the high resistance film  11  and low resistance films  21   a ,  21   b  formed thereon, the spacer  120  shown in  FIGS. 1 and 6  in which the high resistance film  11  and low resistance films  21   a ,  21   b  are formed on the insulating substrate  1  constituted of the cut portion of the formation member is manufactured. In the manufacture method, the utilization efficiency of the heat during the manufacture of the spacer  120  is enhanced. Furthermore, a time loss is reduced between the process of forming the formation member to form the insulating substrate  1  and the process of forming the high resistance film  11  or the electrode  21   a ,  21   b  on the formation member, and the tact time of the manufacture process is minimized, so that the electron beam apparatus supporting member manufacture method very high in mass productivity is realized. 
   Furthermore, by using the material of glass or glass fiber in the insulating substrate  1  constituting the spacer  120 , the electron beam apparatus low in cost, easy in processings such as cutting and abrading, and satisfactory in assembling strength can be prepared. 
   As described above, in the display panel of the image display of the present embodiment, by using the surface conduction cold cathode device having the electroconductive film including the electron-emitting region between the electrodes as the electron-emitting device, the structure of the device can easily be obtained with a high luminance. 
   Moreover, the region on which a latent image can be formed by various materials from the standpoint of image recording can be used as the region irradiated with electron beams, but when the electron beam irradiated region is formed of phosphor, the image display which can inexpensively provide a dynamic image can be obtained. 
   Furthermore, by using an image-forming member for forming an image when irradiated with electrons emitted from the electron-emitting device in response to an input signal as the electron beam irradiated region, instead of the fluorescent film  118 , the electron beam apparatus can be applied to an image-recording apparatus as the image-forming apparatus. For example, by using the electron beam apparatus applied to the image display of the present embodiment as a light emitting source to replace the light emitting diode of an optical printer comprising a photosensitive drum and the light emitting diode, the image recording apparatus can be constituted. In this case, by appropriately selecting m pieces of row-directional wiring and n pieces of column-directional wiring, the source can be applied not only as a linear light emitting source but also as a two-dimensional light emitting source. In this case, the member on which the latent image is formed by electron charging can be used as the image-forming member. The electron beam apparatus using the spacer of the present embodiment can also be applied, for example, to an electron microscope in which the electron beam irradiated region of the electrons emitted from the electron source is other than the image-forming member of phosphor. Therefore, the present invention can be embodied as a general electron beam apparatus in which the electron beam irradiated region is not specified. 
   EXAMPLES 
   The method of manufacturing the electron beam apparatus supporting member of the present invention will mainly be described in the following examples. 
   First Example 
     FIGS. 7  to  9  are explanatory views showing the method of manufacturing the spacer  120  shown in  FIGS. 1 and 6  as the method of manufacturing the electron beam apparatus supporting member of a first example of the present invention.  FIG. 7  is a schematic view showing the apparatus fo use in the method of manufacturing the electron beam apparatus supporting member of the present example.  FIG. 8  is an explanatory view of a process of forming the high resistance film in a spray head section shown in  FIG. 7 , and  FIG. 9  is an explanatory view of a process of using a transfer roller shown in  FIG. 7  to form the spacer electrode. 
   In the method of manufacturing the electron beam apparatus supporting member of the present example, as shown in  FIG. 7 , a heater  103  is used to heat a part of a glass base material  101   a  which is the same constituting material as that of the insulating substrate (supporting member base)  1 . First, the glass base material  101   a  formed of the materials constituting the insulating substrate  1  is prepared to form the insulating substrate  1 . The glass base material  101   a  has a rectangular sectional shape, and is extended like a bar in one direction while the sectional shape of the glass base material  101   a , and sectional area Si are substantially constant. By heating a part of the longitudinal direction of the glass base material  101   a  by the heater  103  to a softening point of the material constituting the glass base material  101   a  or a higher temperature, simultaneously drawing the heated portion of the glass base material  101   a , that is, performing heating/drawing and molding, a glass material  102   a  having the same sectional area S 2  as the sectional area of the insulating substrate  1  of the spacer  120  is prepared as the formation member for forming the insulating substrate  1 . Therefore, the glass material  102   a  is constituted of the drawn portion of the glass base material  101   a . The high resistance film is formed on the glass material  102   a  by a spray head region  104  controlled by a controller  105   a , and further by applying a transfer application solution  107  to the glass material  102   a  by a transfer roller  106 , the spacer electrode is formed on the glass material  102   a.    
   Here, the glass base material  101   a  is fed in a direction toward the heater  103  with a feed velocity V 1 , and the end on the downstream side of the feed direction of the glass base material  101   a , that is, the end of the glass material  102   a  opposite to the side of the heater  103  is drawn by a drawing roller  108  in the same direction as the feed direction of the glass base material  101   a  with a drawing velocity V 2 . 
   The sectional shape of the glass base material  101   a  is analogous to the sectional shape of the glass material  102   a , and the sectional area S 2  of the glass material  102   a  is smaller than the sectional area S 1  of the glass base material  101   a . In the present example, the heating, drawing and molding were performed so that the sectional dimension of the glass material  102   a  was 1.8 mm×0.2 mm, and the sectional size of the glass base material  101   a  was set to be ten times that of the glass material  102   a . Moreover, PD 200 manufactured by Asahi Glass Co., Ltd. was used as the material of the glass base material  101   a , and the heating temperature of the glass base material  101   a  by the heater  103  was set to about 700° C. 
   Two large side surfaces out of four side surfaces of the glass material  102   a  correspond to high resistance film forming surfaces  161  on which the high resistance films are formed by the spray head region  104 , and two small side surfaces correspond to electrode forming surfaces  162  on which the spacer electrodes are formed by the transfer roller  106 . 
   The ratio of the analogous shape of the sections of the glass base material  101   a  and glass material  102   a , the heating temperature by the heater  103 , the feed velocity V 1  of the glass base material  101   a , and the drawing velocity V 2  of the glass material  102   a  are dependent on the material type of the glass base material  101   a , the processed shape of the heating, drawing and molding, and the like, but the analogous shape ratio of several times to several hundreds of times, and the heating temperature equal to or higher than the softening point of the glass base material  101   a  can be applied. The temperature for heating the glass base material  101   a  in the heating, drawing and molding is usually set in a range of 500 to 800° C. Moreover, the feed velocity V 1  of the glass base material  101   a  needs to be smaller than the drawing velocity V 2  of the glass material  102   a , but the optimum conditions of the velocities can arbitrarily be determined. In the present example, the heating, drawing and molding of the glass base material  101   a  were performed with the feed velocity V 1  of 1 m/min, and the drawing velocity V 2  of 10 m/min. 
   A method of forming the high resistance film on the glass material  102   a  will next be described with reference to FIG.  8 . 
   The spray head region  104  shown in  FIG. 7  is provided with a plurality of spray heads  201  as spray sections as shown in  FIG. 8  in order to form the high resistance film on each high resistance film forming surface  161  of the glass material  102   a . Each spray head  201  is connected to one end of an application solution supply line  202  for supplying to the spray head  201  an application solution  204  to be sprayed to the glass material  102   a  from the spray head  201  in a mist form. Moreover, each spray head  201  is connected to one end of a gas supply line  203  for supplying to the spray head  201  the gas for use in spraying the application solution  204  via the spray head  201 . 
   In the present example, as the application solution  204  for forming the high resistance film, silicon and carboxylic acid of tin oxide having a metal mixture molecular ratio of 2:1 were dissolved in an octane solvent at a carboxylic acid concentration of 10 mol/l for use. By spraying the application solution  204  to the glass material  102   a  from the spray head  201  of the spray head region  104  in a mist state by nitrogen gas controlled by the controller  105   a  and supplied to the spray head  201  through the gas supply line  203 , the application solution  204  was applied to the high resistance film forming surfaces  161 , that is, both surfaces of the glass material  102   a . When the application solution  204  applied to each high resistance film forming surface  161  adheres to the high resistance film forming surface  161 , a high resistance film  205  is formed on the high resistance film forming surface  161 . 
   Here, the heat for heating the glass base material  101   a  to form the glass material  102   a  by the molding/processing is utilized as the amount of heat for forming the high resistance film  205 , and a part of the heat amount is compensated by the heat during the heating of the glass base material  101   a . In this case, a part of the heat for heating the glass base material  101   a  is utilized as the heat amount for drying the application solution  204 . 
   In the present example, the feed direction of the glass base material  101   a , and the drawing direction of the glass material  102   a  were set to substantially agree with a gravity force direction, and the spray head  201  was inclined to perform spraying so that the spray direction of each spray head  201  formed an angle of about 40° to the high resistance film forming surface  161  from its state vertical to the high resistance film forming surface  161 . 
   This process of forming the high resistance film  205  on the high resistance film forming surface  161  is performed in the process of cooling the temperature for heating the glass base material  101   a  to mold/process the glass base material  101   a  down to the atmospheric temperature around the glass material  102   a.    
   Additionally, in the present example, when the surface temperature of the part of the high resistance film forming surface  161  in the vicinity of the spray head  201  was measured during the spraying by the spray head  201 , 400° C. was obtained. 
   Additionally, as the application solution  204 , various materials including a simplex material and a composite material can be applied as long as the material can be applied to the glass material  102   a  by the spray head  201  and its specific resistance value is of the order of 1E5 to 1E9 Ωcm. 
   A method of using the transfer roller  106  to form the spacer electrode on the glass material  102   a  will next be described with reference to FIG.  9 . As shown in  FIG. 9 , the transfer roller  106  applies an application solution  107  in a container  302  to an electrode forming surface  162  of the glass material  102   a . The application solution  107  contains materials for forming the spacer electrode on the electrode forming surface  162 . The application solution  107  in the container  302  is applied to the surface of the transfer roller  106  by a blade  301 , and the application solution  107  applied to the surface of the transfer roller  106  is applied to the surface of the electrode forming surface  162  with the rotation of the transfer roller  106 . Thereafter, when the application solution  107  applied to the surface of the electrode forming surface  162  solidifies by the heat used for heating the glass material  102   a  by the heater  103  to perform the heating/drawing/molding, two spacer electrodes  303  are formed on the electrode forming surface  162 . The spacer electrodes  303  formed on the electrode forming surface  162  contact two high resistance films  205 , and are electrically connected to the high resistance films  205 . 
   In the present example, silver paste was used as the material of the application solution  107 . Moreover, as the transfer roller  106 , the roller with 4 μm deep linear grooves extended in parallel with the rotation axis of the transfer roller  106  and formed on the surface at a pitch of 10 μm was used. For the pitch of the grooves formed on the transfer roller  106 , the size of the transfer roller  106 , and the rotation velocity of the transfer roller  106 , arbitrary values can appropriately be selected in accordance with the viscosity and particle properties of the application solution  107 , the application thickness of the application solution  107 , and the drawing velocity V 2  of the glass material  102   a.    
   This process of forming the spacer electrode  303  on the electrode forming surface  162  is performed in the process of cooling the temperature in forming the high resistance film  205  on the high resistance film forming surface  161  down to the atmospheric temperature around the glass material  102   a . Additionally, in the present example, when the surface temperature of the part of the electrode forming surface  162  in the vicinity of the transfer roller  106  was measured during the applying of the application solution  107  by the transfer roller  106 , 360° C. was obtained. 
   Moreover, in the process of forming the spacer electrode  303 , the heat used for heating the glass base material  101   a  to form the glass material  102   a  by the molding/processing is utilized as the heat amount for forming the spacer electrode  303 , and a part of the heat amount is compensated by the heat used for heating the glass base material  101   a . In this case, a part of the heat used for heating the glass base material  101   a  is utilized as the heat amount for drying the application solution  107 . 
   As the material of the application solution  107 , various materials can appropriately be selected and applied as long as the material can be applied to the electrode forming surface  162  by the transfer roller  106  and its specific resistance value is 1E5 Ωcm or less. 
   By cutting the glass material  102   a  with the high resistance film  205  and spacer electrode  303  formed thereon to a predetermined length, the spacer  120  shown in  FIGS. 1 and 6  is manufactured. Here, the insulating member of the electron beam apparatus supporting member is constituted of the cut portion of the glass material  102   a , the cut portion of the glass material  102   a  corresponds to the insulating substrate  1  shown in  FIG. 6 , and the high resistance film  205  corresponds to the high resistance film  11  shown in FIG.  6 . One of two spacer electrodes  303  corresponds to the low resistance film  21   a  shown in  FIG. 6 , and the other corresponds to the low resistance film  21   b  shown in FIG.  6 . 
   When the spacer  120  manufactured through the above-described processes was used to prepare a display similar to the image display shown in  FIG. 1 , a high-quality image could be displayed without much color deviation similarly to the conventional image. 
   As described above, in the spacer manufacture method of the present embodiment, by utilizing the heat used in forming the glass material  102   a  to form the high resistance film  205  and the spacer electrodes  303 , the heat utilization efficiency during the manufacture can be enhanced. Moreover, the tact time was reduced by the continuous process. As described above, in the present invention, the spacer remarkably high in mass productivity can be supplied. 
   Moreover, in the present example, the high resistance film and the spacer electrode were formed by utilizing the heat used in molding the substrate, but the heat can be utilized only during the drying. For example, when the solution with oxide particles dispersed therein is applied to form the high resistance film, in order to obtain the charging preventive function of the high resistance film, the crystal growth of oxide is necessary in some cases. In this case, after performing only the drying in a continuous process, the film can be formed by performing calcining separately. Also in this case, to continuously perform the drying process, the mass production efficiency can be raised. 
   Moreover, the present invention can be applied not only to the glass base material  101   a  having a rectangular section shape but also to the spacers having columnar, elliptical, square, and other shapes. Furthermore, in the present example, the high resistance film was formed in a single layer but may be formed in multiple layers. When the film is formed to be multilayered, the high resistance film can be formed by performing the spray application a plurality of times in accordance with the number of layers. Furthermore, the forming order of the high resistance film and spacer electrode can be reversed. 
   Additionally, in the present example, the spacer electrode is formed after the high resistance film is formed, but the high resistance film can be formed after the spacer electrode is formed. 
   Second Embodiment 
   Referring to  FIGS. 10 ,  11 A and  11 B, there are shown diagrams of assistance in explaining a method of manufacturing a supporting member for an electron beam apparatus according to a second embodiment of the present invention.  FIG. 10  is a diagram typically showing an apparatus used for a method of manufacturing the supporting member for the electron beam apparatus of this embodiment, and  FIGS. 11A and 11B  are diagrams of assistance in explaining a step of forming a high resistance film in a spray head portion shown in  FIG. 10. A  method of manufacturing the supporting member for the electron beam apparatus of this embodiment is used for manufacturing the supporting member for the electron beam apparatus having a cylindrical shape by forming high resistance film and spacer electrodes on a cylindrical insulating member. In  FIGS. 10 ,  11 A and  11 B, identical reference characters designate the same components used in the first embodiment. 
   In the method of manufacturing the supporting member for the electron beam apparatus of this embodiment, as shown in  FIG. 10 , a part of a glass base material  101   b  of the same component as for the insulating member forming the spacers as the supporting member for the electron beam apparatus is heated to a temperature equal to or higher than a softening point of the component of the glass base material  101   b  by using a thermal heater  103  to draw the heated portion of the glass base material  101   b  for molding. By this processing, a glass material  102   b  is made as a formation member for forming an insulating member, having the same sectional area as that of the insulating member composing the spacer. The glass material  101   b , having a circular sectional configuration, extends unidirectionally like a stick with keeping the almost same sectional configuration and sectional area of the glass base material  101   b.    
   In this embodiment, the glass material  102   b  is formed by heat and draw molding so as to have a cylindrical shape of 0.25 mm in diameter and a sectional area of the glass base material  101   b  is assumed to be 20 times the sectional area,of the glass material  102   b . A soda lime glass is used as a material of the glass base material  101   b  and a heating temperature of the glass base material  101   b  is assumed to be approx. 650° C. when the heater  103  is used. Furthermore, a pushing speed V 3  of the glass base material  101   b  is assumed to be 5 m/min and a pull-out speed V 4  of the glass material  102   b  is to be 100 m/min. 
   Next, a method of forming the high resistance film on the glass material  102   b  is described by referring to  FIGS. 11A and 11B .  FIG. 11A  is a diagram showing a condition in which a coating solution is sprayed from a spray head  501 , which is a plan view perpendicular to the direction of pushing the glass base material  101   b .  FIG. 11B  is a section view of  FIG. 11A  taken on line  11 B— 11 B, which is a diagram showing positions of spray holes on a spray head  501 . 
   As shown in  FIG. 11A , the spray head  501  has a cylindrical shape enclosing a part of the glass material  102   b  with a plurality of spray holes  502  for spraying the coating solution  504  formed on an inner surface of the spray head  501 . In this embodiment, eight spray holes  502  are arranged inside the spray head  501  so that the coating solution  504  is sprayed from eight directions toward the glass material  102   b.    
   In addition, as shown in  FIG. 11B , the eight spray holes  502  are arranged so as to be divided into two stages. The coating solution  504  is sprayed toward a surface of the glass material  102   b  from respective spray holes  502  arranged on the spray head  501  in this manner, by which the surface of the glass material  102   b  is uniformly coated with the coating solution  504 . At this point, the coating solution  504  is sprayed from the spray holes  502  by means of nitrogen gas controlled by a controller  105   b  shown in FIG.  10 . Afterwards the coating solution  504  applied on the surface of the glass material  102   b  is set up, by which a high resistance film is uniformly formed over the surface of the glass material  102   b.    
   At this point, heat at forming the glass material  102   b  by heating the glass base material  101   b  for molding is utilized as heat for forming the high resistance film, and a part of the amount of the heat is supplemented with the heat used for heating the glass base material  101   b . In this condition, a part of the heat used for heating the glass base material  101   b  is utilized as an amount of heat for drying the coating solution  504 . 
   In this manner, the high resistance film on a side of the glass material  102   b  is formed in a process in which the glass material  102   b  cools down from a temperature at which the glass base material  101   b  is molded by heating the glass base material  101   b  to an atmospheric temperature around the glass material  102   b . As for the coating solution  504 , is used a coating solution in which NiO fine particles are dispersed to the solvent. Also in this embodiment, the pushing direction of the glass base material  101   b  and the pushing direction of the glass base material  101   b  and the pull-out direction of the glass material  102   b  are almost matched to a gravity direction. 
   Next, a formation in which the high resistance film is formed on the glass material  102   b  is cut perpendicularly to a longer direction of the glass material  102   b  so that the glass material  102   b  has a predetermined length. Accordingly, a cylindrical insulating member is made by using the cut portion of the glass material  102   b  as a component of the supporting member for the electron beam apparatus. Next, low resistance films are formed as spacer electrodes on the cut surface of the cylindrical glass material  102   b , in other words, upper and lower surfaces of the cylindrical glass material  102   b  which has been cut, or the cut surface of the high resistance film formed on the side of the glass material  102   b . Accordingly, spacers are manufactured as the supporting member for the electron beam apparatus in which the high resistance film and spacer electrodes are formed on the cut portions of the glass material  102   b  which is the cylindrical insulating material. 
   Referring to  FIG. 12 , there is shown a perspective view of a display panel of an image display configured by using the spacers according to the manufacturing method explained by referring to  FIGS. 10 ,  11 A and  11 B. In  FIG. 12 , reference characters identical to those in  FIG. 1  designate the same components as in FIG.  1 . The display panel shown in  FIG. 12  is different from that in  FIG. 1  only in that spacers  121  are used instead of the spacers  120  in FIG.  1 . 
   The spacer shown in  FIG. 12  is a cylindrical supporting member for, an electron beam apparatus manufactured by using a manufacturing method of this embodiment described by referring to  FIGS. 10 ,  11 A and  11 B. Therefore, this type of a display panel of an image display also has achieved a capability of displaying a high-quality image with less color aberration in the same manner as for the conventional one. 
   Third Embodiment 
   Referring to  FIG. 13 , there is shown a diagram of assistance in explaining a method of manufacturing a supporting member for an electron beam apparatus according to a third embodiment of the present invention.  FIG. 13  typically shows an apparatus used for the method of manufacturing the supporting member for the electron beam apparatus of this embodiment. In  FIG. 13 , identical reference characters designate the same components used in the first and second embodiments. 
   In the method of manufacturing the supporting member for the electron beam apparatus of this embodiment, is used a melting pot  602  for melting a glass base material  601  as shown in FIG.  13 . As a material of the glass base material  601 , a soda lime glass is used. First, a glass base material  901  in the melting pot  602  is melted at a temperature of 950° C. by a heater  103 . Although the heating temperature with the heater  103  can be equal to or higher than a softening point of the glass base material  601 , the heating temperature is generally set within a range of 600° C. to 1,100° C. in the manufacturing method of this embodiment. 
   At a bottom of the melting pot  602 , there is formed a hole  602   a  from which the glass base material  601  melted in the melting pot  602  flows outside the melting pot  602 . The glass base material  601  flowing out of the hole  602   a  is set up, by which the set-up portion of the glass base material  601  becomes a glass material  102   c  which is a formation member for forming an insulating member which is a component of the supporting member for the electron beam apparatus. Therefore, the glass material  102   c  is formed by the set-up portion of the glass base material  601 . 
   In this embodiment, an end portion of the glass material  102   c  opposite to the heater  103  is pulled out at the pull-out speed V 5  by a pull-out roller  108 . While the pull-out speed V 5  of the glass material  102   c  is determined on the basis of a material type of the glass base material  601 , a temperature of the glass base material  601 , and a diameter of the hole  602   a  of the melting pot  602 , an optimum condition of the pull-out speed V 5  can be set arbitrarily. In this embodiment, the pull-out speed V 5  is set to 50 m/min and a diameter of the hole  602   a  is set to 0.8 mm. 
   On a surface of the glass material  102   c  formed by the glass base material  601  melted in the melting pot  602  flowing out of the hole  602   a , the high resistance film is formed by using the spray head  501  and the controller  105   b  used in the second embodiment. As for the coating solution sprayed from the spray head  501  for forming the high resistance film on the surface of the glass material  102   c , is used a water solution to which fine particles of silicon and tin oxide are dispersed. 
   As set forth in the above, the high resistance film is formed on the side of the glass material  102   c  in a process in which the glass material  102   c  cools down from the temperature at which the glass base material  601  is heated to be melted for molding the glass base material  601  to an atmospheric temperature around the glass material  102   c . Therefore, the heat at forming the glass material  102   c  by heating the glass base material  601  to be melted for molding the glass material  102   c  is utilized as a heat for forming the high resistance film on the glass material  102   c  and the amount of the heat is supplemented with the heat used for heating the glass base material  601  to be melted. In this embodiment, a measurement of 550° C. is obtained in relation to a surface temperature of a portion in the vicinity of the spray head  501  of the glass material  102   c  in a spraying stage with the spray head  501 . 
   Subsequently, a formation in which the high resistance film is formed on the glass material  102   c  is cut perpendicularly to the longer direction of the glass material  102   c  so that the glass material  102   c  has a predetermined length. At this point, a cylindrical insulating member is made by using the cut portion as a component of the supporting member for the electron beam apparatus. Next, low resistance films are formed as spacer electrodes on the cut surface of the cylindrical glass material  102   c , in other words, an upper surface and a lower surface of the cylindrical glass material  102   c  which has been cut, or the cut surface of the high resistance film formed on the side of the glass material  102   c . Accordingly, spacers are manufactured as the supporting member for the electron beam apparatus in which the high resistance film and spacer electrodes are formed on the cut portions of the glass material  102   b  which is the cylindrical insulating material. 
   As a result of making the same display panel for the image display as shown in  FIG. 12  according to the second embodiment by using the spacers manufactured as the supporting member for the electron beam apparatus according to a method of this embodiment, a high-quality image has been displayed with less color aberration in the same manner as for the conventional one. 
   Fourth Embodiment 
   Referring to  FIGS. 14A  to  14 C, there are shown diagrams of assistance in explaining a method of manufacturing a supporting member for an electron beam apparatus according to a fourth embodiment of the present invention. 
   In the method of manufacturing the supporting member for the electron beam apparatus according to this embodiment, a plate glass base material  701  is mounted first on a surface of the heating plate  702  as shown in FIG.  14 A. As a material of the glass base material  701 , borosilicate glass is used. This glass base material  701  is heated to a temperature of 700° C. by a heating plate  702 . 
   Next, the entire surface of the glass base material  701  heated on the heating plate  702  is pushed by a pressing member  703  to press the glass base material  701  as shown in  FIG. 14B  so that the glass base material  701  has a predetermined thickness. This forms a glass sheet  704  comprising the glass base material  701  shaped so as to have the predetermined thickness. In this manner, the glass base material  701  is compression molded by pressing it with the pressing member  703  so that the glass base material  701  has the predetermined thickness, by which the glass sheet  704  is made as a sheet formation member for forming an insulating member which is a component of a spacer as the supporting member for the electron beam apparatus. 
   Subsequently, as shown in  FIG. 14C , a coating solution  705  is sprayed from a spray head  706  toward a surface of the glass sheet  704  to coat the entire surface of the glass sheet  704  uniformly with the coating solution  705 . The coating solution  705  applied to the surface of the glass sheet  704  is set up in this condition, by which a precursor of a high resistance film is formed on the surface of the glass sheet  704 . 
   Then, the glass sheet  704  covered by the precursor of the high resistance film on its surface is turned over so as to expose a rear surface of the glass sheet  704  and the rear surface is coated with the coating solution  705  in the same manner as for its face surface to form a precursor of the high resistance film. 
   As set forth in the above, the precursor of the high resistance film is formed on the face and rear surfaces of the glass sheet  704  in a process in which the glass sheet  704  cools down from the temperature at which the glass base material is heated to be compression molded to an atmospheric temperature around the glass sheet  704 . Therefore, the heat at forming the glass sheet  704  by heating the glass base material  701  with the thermal heater  702  for compression molding the glass sheet  704  is utilized as a heat for forming the precursor of the high resistance film on the glass sheet  704 , and the amount of the heat is supplemented with the heat used for heating the glass base material  701 . 
   Subsequently by calcining a formation in which the precursor of the high resistance film is formed on the face and the rear surfaces of the glass sheet  704 , the high resistance film is formed on the face and rear surfaces of the glass sheet  704 . 
   In this embodiment, as the coating solution  705 , is used a coating solution in which carboxylate of silicon and tin oxide is taken into solution at a density of carboxylate of 8 mol/l in octane solvent at 2:1 of a metal mixture molar ratio. The precursor of the high resistance film formed on the face and rear surfaces of the glass sheet  704  is carboxylic acid left on the glass sheet  704  being decomposed after the solvent has vapored from the coating solution  705  or adhering to the surface of the glass sheet  704  with a part of it not decomposed. In this embodiment, by calcining the coating solution  705  comprising the above component at 500° C., a stable high resistance film is formed on the surface of the glass sheet  704 . 
   Next, a formation in which the high resistance film is formed on the face and rear surfaces of the glass sheet  704  is cut by using a dicing saw. At this point, an insulating member which is a component of the supporting member for the electron beam apparatus is made by using the cut portion of the glass sheet  704 . Then, spacer electrodes are formed on a cut surface of the glass sheet  704  and a cut surface of the high resistance film on the glass sheet  704  for the cut portion of the glass sheet  704 , by which spacers are manufactured as the supporting member for the electron beam apparatus in which the high resistance film and the spacer electrodes are formed on the insulating member. 
   As a result of making the same image display shown in  FIG. 1  by using the spacers manufactured as the supporting member for the electron beam apparatus according to a method of this embodiment, a high-quality image has been displayed with less color aberration in the same manner as for the conventional one. 
   The method of manufacturing the supporting member for the electron beam apparatus according to the present invention is not limited to those in the first to fourth embodiments described above, but also includes combinations of the methods described in the first to fourth embodiments. For example, in the first to third embodiments, it is also possible to form the precursor of the high resistance film on the glass material by utilizing the heat for heating the glass base material for molding instead of forming the high resistance film directly on the glass material which is the formation member for forming the insulating member which is a component of the supporting member for the electron beam apparatus. In this case, by calcining the precursor of the high resistance film formed on the glass material, the high resistance film is formed on the glass material. In addition, in forming the spacer electrodes on the glass material, the precursor of the spacers electrodes can be formed on the glass material by utilizing the heat for heating the glass base material for molding. In this case, by calcining the precursor of the spacer electrodes formed on the glass material, the spacer electrodes can be formed on the glass material. 
   As set forth hereinabove, according to the present invention, it is possible to reduce a process time significantly for manufacturing a supporting member and to provide a supporting member with less unevenness of a shape and characteristics. In addition, the present invention has an effect that, in the cooling process of the formation member formed by heating and molding the base material comprising the component of the insulating member for manufacturing a supporting member for an electron beam apparatus being arranged in an airtight container for containing an electron source having a plurality of electron-emitting devices between the electron source and a control electrode and comprising an insulating member on which at least one of a high resistance film and an electrode is formed, it is possible to utilize the heat used when the base material is heated for molding to form the formation member with forming a high resistance film or the precursor on the formation member, for a purpose of forming the high resistance film or the electrode or their precursor, thereby improving an efficiency of utilization of the heat. Furthermore, the present invention advantageously reduces a time loss between a step of forming the formation member for forming the insulating member which is a component of the supporting member for the electron beam apparatus and a step of forming the high resistance film or the electrode on the formation member, thereby reducing a tact time, by which it is possible to achieve a method of manufacturing a supporting member for an electron beam apparatus having a high mass production property. Therefore, it has an effect that the supporting member for the electron beam apparatus can be manufactured in a small number of simplified sequential processes, thereby achieving a method of manufacturing a supporting member for an electron beam apparatus requiring only a short manufacturing time and a low manufacturing cost.