Patent Publication Number: US-2023160926-A1

Title: Probe card

Description:
TECHNICAL FIELD 
     The present disclosure relates generally to a probe card. More particularly, the present disclosure relates to a probe card that is configured so that a connection member for connecting a circuit board and probes to each other and an insulating part of a probe head are made of the same material, thereby minimizing thermal deformation and thereby preventing a wafer test error even when a temperature change occurs. 
     BACKGROUND ART 
     In general, a semiconductor manufacturing process largely includes a fabrication process for forming a pattern on a wafer, an electrical die sorting (EDS) process for testing electrical characteristics of respective chips constituting the wafer, and an assembly process for assembling the wafer on which a pattern is formed to individual chips. 
     Here, the EDS process is performed to detect defective chips among the chips constituting the wafer. In the EDS process, a probe card which applies electrical signals to the chips constituting the wafer and determines whether the chips are defective on the basis of signals checked from the applied electrical signals is mainly used. 
     A probe card is a device that connects a semiconductor wafer (or a semiconductor device) and test equipment to test the operation of the semiconductor device, and serves to transmit electricity while connecting probes provided on the probe card to a wafer, and then sort defective semiconductor chips on the basis of feedback signals received thereby. 
     The probe card used for an electrical test of the semiconductor device may include a circuit board, a connection member, a probe head, and probes. In the probe card, an electrical path is provided through the circuit board, the connection member, and the probe head, and a pattern of a wafer is tested by the probes that directly contact the wafer. 
     Specifically, in the probe card, the probes in contact with the wafer pass through an insulating part of the probe head, and the circuit board and the probes are electrically connected to each other through the connection member to test the pattern of the wafer. 
     In general, the EDS process may be performed under a high-temperature environment. Therefore, an overall temperature of the probe card increases during the process. In this case, when the insulating part of the probe head through which the probes pass and the connection member connected to the probes are made of different materials, the insulating part of the probe head and the connection member have different coefficients of thermal expansion. That is, when the overall temperature of the probe card increases, the connection member and the insulating part of the probe head expand to different degrees. As a result, the interval between the probes and the interval between wires connecting the probes and the circuit board to each other may become different, leading to disconnection between the circuit board and the probes. That is, an error may occur in testing the wafer. 
     An example of a probe card for minimizing such a problem is disclosed in Korean Patent No. 10-1167509 (hereinafter referred to as “related art”). 
     In the related art, an interposer and a probe block through which probes pass are made of the same material such as ceramic or plastic. Therefore, the interposer and the probe block may expand to the same degree when exposed to high temperature. However, such conventional ceramic or plastic is a material having a high coefficient of thermal expansion, so that when the probe card is provided in a high-temperature environment, the probe block and the interposer are thermally deformed, with the result that the probes and a conductive material connecting the probes to each other cannot be fixed in position. In addition, in the case of the conventional ceramic or plastic, mechanical processing such as laser or drill processing is performed to form through-holes allowing passage of the probes, which generates a residual stress, resulting in a problem of deteriorating durability during use of the probe card. 
     DOCUMENTS OF RELATED ART 
     (Patent Document 1) Korean Patent No. 10-1167509 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     Accordingly, the present disclosure has been made keeping in mind the above problems occurring in the related art, and an objective of the present disclosure is to provide a probe card that is configured so that a connection member for connecting a circuit board and probes to each other and an insulating part of a probe head are made of the same material, thereby minimizing thermal deformation and thereby preventing a wafer test error even when a temperature change occurs. 
     Still another objective of the present disclosure is to provide a probe card that copes with a fine pitch of electrode pads of a wafer. 
     Solution to Problem 
     In order to accomplish the above objectives, according to an aspect of the present disclosure, there is provided a probe card, including: a circuit board; a probe head having a guide plate, and through which a plurality of probes pass; and a connection member electrically connecting the circuit board and the probes to each other, wherein an insulating part of the connection member and the guide plate may be made of an anodic aluminum oxide film formed by anodizing a metal as a base material. 
     Furthermore, the connection member may be configured as a space transformer. 
     Furthermore, the connection member may be configured by stacking a plurality of unit anodic aluminum oxide sheets. 
     Furthermore, the connection member may be configured as an interposer. 
     Furthermore, the connection member may be configured by stacking a plurality of unit anodic aluminum oxide sheets. 
     Advantageous Effects of Invention 
     As described above, a probe card according to the present disclosure is configured so that a connection member for connecting a circuit board and probes to each other and an insulating part of a probe head are made of the same material, thereby making it possible to minimize thermal deformation and thus prevent a wafer test error even when a temperature change occurs. 
     In addition, it is possible to cope with a fine pitch of electrode pads of a wafer. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a view schematically illustrating a probe card according to a first embodiment of the present disclosure. 
         FIGS.  2 A to  2 D  are views illustrating a method of manufacturing a lower guide plate illustrated in  FIG.  1   . 
         FIGS.  3 ,  4 A, and  4 B  are views each illustrating a laminated state of the lower guide plate illustrated in  FIGS.  2 A to  2 D . 
         FIG.  5    is a view schematically illustrating a modified example of the probe card illustrated in  FIG.  1   . 
         FIG.  6    is a view schematically illustrating a probe card according to a second embodiment of the present disclosure. 
         FIG.  7    is a view schematically illustrating a modified example of the probe card illustrated in  FIG.  6   . 
     
    
    
     MODE FOR THE INVENTION 
     Contents of the description below merely exemplify the principle of the present disclosure. Therefore, those of ordinary skill in the art may implement the theory of the present disclosure and invent various apparatuses which are included within the concept and the scope of the present disclosure even though it is not clearly explained or illustrated in the description. Furthermore, in principle, all the conditional terms and embodiments listed in this description are clearly intended for the purpose of understanding the concept of the present disclosure, and one should understand that the present disclosure is not limited to the exemplary embodiments and the conditions. 
     The above described objectives, features, and advantages will be more apparent through the following detailed description related to the accompanying drawings, and thus those of ordinary skill in the art may easily implement the technical spirit of the present disclosure. 
     The embodiments of the present disclosure will be described with reference to cross-sectional views and/or perspective views which schematically illustrate ideal embodiments of the present disclosure. For explicit and convenient description of the technical content, thicknesses and widths of members and regions in the figures may be exaggerated. Therefore, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. 
     In addition, a limited number of holes are illustrated in the drawings. Thus, the embodiments should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. 
     In describing various embodiments, the same reference numerals will be used throughout different embodiments and the description to refer to the same or like elements or parts. In addition, the configuration and operation already described in other embodiments will be omitted for convenience. 
     Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. 
       FIG.  1    is a view schematically illustrating a probe card  100  according to a first embodiment of the present disclosure. In this figure, for convenience of description, the number and size of a plurality of probes  80  are illustrated exaggeratedly. 
     Depending on the structure of installing the probes  80  on a connection member  140  (ST) and the structure of the probes  80 , the types of the probe card  100  may be classified into a vertical type probe card, a cantilever type probe card, and a micro-electro-mechanical system (MEMS) probe card. In the present disclosure, as an example, a vertical type probe card  100  is illustrated to describe a coupling structure between the connection member  140  (ST) and other peripheral parts. The type of the probe card in which the coupling structure between the connection member  140  (ST) and other peripheral parts is implemented is not limited thereto, and may be the MEMS probe card and the cantilever type probe card. 
       FIG.  1    illustrates a contact state of electrode pads WP of a wafer W. A test for electrical characteristics of semiconductor devices is performed by approaching the wafer W to the probe card  100  having the plurality of probes  80  on a wiring substrate, and bringing the respective probes  80  into contact with corresponding electrode pads WP on the wafer W. After the probes  80  reach positions where the probes  80  are brought into contact with the electrode pads WP, the wafer W may be further lifted by a predetermined height toward the probe card  100 . This process may be overdrive. 
     As illustrated in  FIG.  1   , the probe card  100  according to the present disclosure may include: the connection member  140  (ST) made of an anodic aluminum oxide film  101 , and including a vertical wiring part  2 , a horizontal wiring part  3  connected to the vertical wiring part  2 , and a probe connection pad  130  electrically connected to each of the plurality of probes  80 ; and a coupling member  150  having a first end  150 a fixed to a surface of the connection member  140  (ST) and a second end  150 b coupled to the circuit board  160  provided above the connection member  140  (ST). In this case, the coupling member  150  may be configured as a bolt, but is not limited thereto. 
     As illustrated in  FIG.  1   , the connection member  140  may be configured as a space transformer ST. The circuit board  160  may be provided above the space transformer  140  (ST), and the probe head  1  on which the plurality of probes  80  are provided may be provided below the space transformer  140  (ST). In other words, the space transformer  140  (ST) may be located between the circuit board  160  and the probe head  1 . The space transformer  140  (ST) may be coupled to peripheral parts by the coupling member  150 . 
     The space transformer  140  (ST) coupled to the circuit board  160  by the coupling member  150  may be electrically connected thereto by a connection member  170  interposed between the circuit board  160  and the space transformer  140  (ST). Specifically, a first connection member connection pad  110  may be provided on an upper surface of the space transformer  140  (ST), and a second connection member connection pad  120  may be provided on a lower surface of the circuit board  160 . Therefore, the connection member  170  interposed between the space transformer  140  (ST) and the circuit board  160  may be joined to the first connection member connection pad  110  and the second connection member connection pad  120  to form an electrical connection between the space transformer  140  (ST) and the circuit board  160 . 
     An insulating part  41  of the space transformer  140  (ST) may be made of the anodic aluminum oxide film  101 . The anodic aluminum oxide film  101  refers to a film formed by anodizing a metal that is a base material, and pores  101   a  refer to pores formed in the anodic aluminum oxide film  101  during the process of forming the anodic aluminum oxide film  101  by anodizing the metal. For example, in a case where the metal as the base material is aluminum (Al) or an aluminum alloy, the anodization of the base material forms the anodic aluminum oxide film  101  consisting of anodized aluminum oxide (Al 2 O 3 ) on a surface SF of the base material. The anodic aluminum oxide film  101  formed as such has a barrier layer BL in which no pores  101   a  are formed and a porous layer PL in which pores  101   a  are formed. The barrier layer BL is positioned on the base material, and the porous layer PL is positioned on the barrier layer BL. In a state in which the anodic aluminum oxide film  101  having the barrier layer BL and the porous layer PL is formed on the surface SF of the base material, when the base material is removed, only the anodic aluminum oxide film  101  consisting of anodized aluminum oxide (Al 2 O 3 ) remains. The resulting anodic aluminum oxide film  101  has the pores  101   a  that have a uniform diameter, are formed in a vertical shape, and have a regular arrangement. In this case, when the barrier layer BL is removed, a structure in which the pores  101   a  vertically pass through the anodic aluminum oxide film  101  from top to bottom is formed. 
     The anodic aluminum oxide film  101  has a coefficient of thermal expansion of 2 to 3 ppm/° C. This may result in a small degree of deformation due to temperature. In addition, the coefficient of thermal expansion of the anodic aluminum oxide film  101  is close to the coefficient of thermal expansion of the wafer W as an object to be tested, so that positional misalignment between the probes  80  and the electrode pads WP may be minimized even under a high-temperature environment. 
     According to the present disclosure, by configuring the space transformer  140  ST using the anodic aluminum oxide film  101 , the space transformer  140  (ST) having a small degree of thermal deformation under a high-temperature environment may be implemented. 
     The space transformer  140  (ST) may have a structure in which a plurality of layers are stacked. Specifically, each of the layers of the space transformer  140  (ST) may have vertical wiring parts  2 , and the vertical wiring parts  2  of an upper layer thereof and the vertical wiring parts  2  of a lower layer thereof may be electrically connected to each other through horizontal wiring parts  3 . In this case, the interval between the vertical wiring parts  2  of an uppermost layer of the space transformer  140  (ST) may be the same as that between second connection member connection pads  120  provided on the circuit board  160 , and the interval between the respective vertical wiring parts  2  of the plurality of layers thereof may become gradually narrow from the uppermost layer toward the lower layer. In this case, the interval between the vertical wiring parts  2  of a lowermost layer of the space transformer  140  (ST) may be the same as that between the respective probe connection pads  130  provided under the space transformer  140  (ST). Therefore, the interval between the probe connection pads  130  provided under the space transformer  140  (ST) may be narrower than that between the second connection member connection pads  120 . In other words, by providing the space transformer  140  (ST) between the circuit board  160  and the probe head  1 , the plurality of probes  80  may be arranged at a narrower interval. This means that it is possible to implement a fine pitch of the probes  80  through the space transformer  140  (ST). 
     The probe head  1  is provided below the space transformer  140  (ST). The probe head  1  supports the probes  80  and includes a plurality of guide plates GP each having a guide hole GH. The probe head  1  may be manufactured by means of bolt fastening as an example. 
     The probe head  1  may have a structure in which an upper guide plate  40  and a lower guide plate  50  are sequentially provided. In this case, at least one of the upper guide plate  40  and the lower guide plate  50  may be made of an anodic aluminum oxide film  101 . 
     The upper guide plate  40  and the lower guide plate  50  may be supported by a first plate  10  and a second plate  20 , respectively. Specifically, the second plate  20  may be provided under the first plate  10 , each of the first plate  10  and the second plate  20  may have a central space for allowing passage of the probes  80 . 
     Specifically, the upper guide plate  40  may be provided in an upper seating region  15  formed on an upper surface of the first plate  10 , and the lower guide plate  50  may be provided in a lower seating region  25  formed on a lower surface of the second plate  20 . In this case, the upper seating region  15  may be configured as a concave recess in the upper surface of the first plate  10 , and the lower seating region  25  may be configured as a concave recess in the lower surface of the second plate  20 . However, since the concave recess shape of the upper seating region  15  and the lower seating region  25  is illustrated as an example, the shape thereof is not limited thereto. Therefore, the upper seating region  15  and the lower seating region  25  may be formed in a suitable shape to allow the upper guide plate  40  and the lower guide plate  50  to be provided on the upper surface of the first plate  10  and the lower surface of the second plate  20  more stably. 
       FIGS.  2 A to  2 D  are views illustrating a method of manufacturing a lower guide plate illustrated in  FIG.  1   . 
     A guide plate GP illustrated in  FIGS.  2 A to  2 D  may be at least one of an upper guide plate  40  and a lower guide plate  50 , and hereinafter will be described as being the lower guide plate  50  as an example. In  FIGS.  2 A to  2 D , for convenience of explanation, a portion of the lower guide plate  50  having a lower guide hole  54  is enlarged and schematically illustrated. 
     As illustrated in  FIG.  2 A , an anodic aluminum oxide film  101  including pores  101   a  may be provided. Then, as illustrated in  FIG.  2 B , a film  5  may be provided under the anodic aluminum oxide film  101 . In this case, the anodic aluminum oxide film  101  may be provided in a state in which a barrier layer BL is not removed, and the barrier layer BL may be provided on an upper surface  180  of the anodic aluminum oxide film  101  on which the film  5  is not provided. That is, a porous layer PL may be provided between the barrier layer BL and the film  5 . Since the upper surface  180  of the lower guide plate  50  may be configured as the barrier layer BL, a problem in which particles flow into the lower guide plate  50  through the pores  101   a  may be prevented. In addition, inner walls of openings of the guide plate GP, into which front ends of a plurality of probes  80  are first inserted during insertion of the probes  80 , may be positioned in the barrier layer BL having a high degree of density, thus having a high degree of durability. This may prevent abrasion of inner walls of openings of guide holes GH that may occur simultaneously with the insertion of the probes  80 . As a result, a particle generation problem due to abrasion of the inner walls of the openings of the guide holes GH may be minimized. 
     As illustrated in  FIG.  2 C , at least a portion of the film  5  may be patterned by a photo process. Therefore, a plurality of film holes  5   a  may be formed in the film  5 . 
     As illustrated in  FIG.  2 D , the anodic aluminum oxide film  101  may be etched through the film holes  5   a,  which are areas removed by patterning. Therefore, by such etching, a plurality of lower guide holes  54  corresponding to the film holes  5   a  may be formed in the anodic aluminum oxide film  101 . That is, the lower guide holes  54  may be holes having the same size as the film holes  5   a.    
     The lower guide plate  50  in which the lower guide holes  54  are formed may be provided on a second plate  20  after the film  5  is removed. However, without being limited thereto, the lower guide plate  50  may be provided on the second plate  20 , with the film  5  provided thereon. 
     The film  5  may be made of a photosensitive material, and preferably, the film  5  is a photosensitive film capable of lithography. In addition, the film  5  may be a material capable of adhesion, and thus, the anodic aluminum oxide film  101  and the film  5  may be bonded without use of a separate adhesive means. The film  5  may be an epoxy, PI, or acrylate-based photoresist. As a more specific example, the film  5  may be SU-8, which is an epoxy-based resist in which eight epoxy groups are included in a single molecule. 
     In a conventional guide plate, insertion holes for probes are formed by mechanical processing such as laser or drilling processing. Therefore, a residual stress is generated when mechanically processing the insertion holes in the guide plate, resulting in a problem of deteriorating durability during use of a probe card. In addition, the holes formed by laser processing are not vertical, resulting in a problem in which a clearance occurs after insertion of the probes. On the contrary, in the lower guide plate  50  according to the present disclosure, since the lower guide holes  54  are formed by etching, the problems caused by mechanical processing may be prevented, and the lower guide holes  54  may have inner walls that are vertical in a straight line. Therefore, since the lower guide plate  50  may be made of a light-transmitting material, this may facilitate insertion of the probes  80 , and since the inner walls of the lower guide holes  54  are straight, a clearance may be prevented from occurring. 
       FIGS.  3 ,  4 A, and  4 B  are views each illustrating a laminated state of the lower guide plate illustrated in  FIGS.  2 A to  2 D . 
     As illustrated in  FIGS.  3 ,  4 A, and  4 B , as an example, a lower guide plate  50  may be configured by stacking a plurality of unit anodic aluminum oxide sheets  200 . In this case, each of upper and lower surfaces  180  and  190  of the lower guide plate  50  may be configured as a barrier layer BL that is formed under a porous layer PL, which is formed by anodizing metal and having regularly arranged pores  101   a , and closes one ends of the pores  101   a.    
     Each of the anodic aluminum oxide sheets  200  may include the porous layer PL made of an anodic aluminum oxide film  101  and having the pores  101   a , and the barrier layer BL formed under the porous layer PL to close one ends of the pores  101   a . Therefore, the anodic aluminum oxide sheet  200  may have a structure in which upper and lower surfaces thereof are asymmetrical. 
     There may be a density difference between the barrier layer BL in which no pores  101   a  exist and the porous layer PL in which the regularly arranged pores  101   a  exist. Therefore, when the upper guide plate  40  or the lower guide plate  50  is configured with only one unit anodic aluminum oxide sheet  200  having an asymmetric structure, warpage deformation may occur under a high-temperature environment. 
     In addition, a plurality of lower guide holes  54  for allowing insertion of a plurality of probes  80  may be formed in the lower guide plate  50 . However, when surfaces SF of the lower guide plate  50  are configured as the respective porous layers PL having the pores  101   a , there may be a problem in which fine particles are collected therein, and then discharged when the probes  80  are inserted through guide holes GH. 
     In addition, when the surfaces SF of the lower guide plate  50  are configured as the porous layers PL, the porous layers PL, which are relatively weak in durability due to their low density, may be abraded during insertion of the probes  80  through the guide holes GH, thereby generating particles. These particles may be discharged in conjunction with the insertion of the probes  80  to cause a problem of a defect in test function of the probe card  100 . 
     Therefore, in the present disclosure, the lower guide plate  50  having the guide holes GH for the insertion of the probes  80  may be configured by stacking the plurality of unit anodic aluminum oxide sheets  200 , and the surfaces SF may be configured as the respective barrier layers BL that are symmetrical. 
     This may ensure a uniform density of the upper and lower surfaces  180  and  190  of the lower guide plate  50 , thereby preventing warpage deformation. 
     In addition, by the barrier layers BL forming the surfaces SF of the lower guide plate  50 , a problem in which particles flow into the lower guide plate  50  through the pores  101   a  may be prevented. 
     In addition, inner walls of openings of the guide holes GH, into which front ends of the probes  80  are first inserted during insertion of the probes  80 , may be positioned in the barrier layer BL having a high degree of density, thus having a high degree of durability. This may prevent abrasion of the inner walls of the openings of the guide holes GH that may occur simultaneously with the insertion of the probes  80 . As a result, a particle generation problem due to abrasion of the inner walls of the openings of the guide holes GH may be minimized. 
     The plurality of unit anodic aluminum oxide sheets  200  may be joined together by a suitable method of joining the unit anodic aluminum oxide sheets  200 . As an example, the unit anodic aluminum oxide sheets  200  may be joined together by a film  5 . 
       FIG.  3    illustrates a laminated structure in the case where a lower guide plate  50  is composed of an even number of unit anodic aluminum oxide sheets  200 . As an example, first and second unit anodic aluminum oxide sheets  201  and  202  may be sequentially stacked. 
     In addition,  FIGS.  4 A and  4 B  illustrate various embodiments of a laminated structure in the case where a lower guide plate  50  is composed of an odd number of unit anodic aluminum oxide sheets  200 . As an example, first to third unit anodic aluminum oxide sheets  201 ,  202 , and  203  may be sequentially stacked. 
     As illustrated in  FIG.  4 A , in the lower guide plate  50 , the first unit anodic aluminum oxide sheet  201  forming a lower surface  190  may be made of an anodic aluminum oxide film  101  having a porous layer PL with pores  101   a  and a barrier layer BL under the porous layer PL. In addition, a third unit anodic aluminum oxide sheet  203  forming an upper surface  180  may be made of an anodic aluminum oxide film  101  having a porous layer PL and a barrier layer BL on the porous layer PL. The second unit anodic aluminum oxide sheet  202  having a barrier layer BL may be provided between the first and third unit anodic aluminum oxide sheets  201  and  203 . 
     As illustrated in  FIG.  4 A , the lower guide plate  50  may have a structure in which the first unit anodic aluminum oxide sheet  201  is provided so that the barrier layer BL is positioned under the porous layer PL, the second unit anodic aluminum oxide sheet  202  is stacked on the first unit anodic aluminum oxide sheet  201  so that the barrier layer BL is positioned under a porous layer PL, and the third unit anodic aluminum oxide sheet  203  is stacked on the second unit anodic aluminum oxide sheet  202  so that the barrier layer BL is positioned on the porous layer PL. 
     Due to the first and third unit anodic aluminum oxide sheets  201  and  203 , the lower guide plate  50  may have the upper and lower surfaces  180  and  190  configured as the barrier layers BL. 
     In addition, as illustrated in  FIG.  4 B , the second unit anodic aluminum oxide sheet  202  may be provided, with the barrier layer BL removed. That is, the second unit anodic aluminum oxide sheet  202  may be provided between the first and third unit anodic aluminum oxide sheets  201  and  203  so that only the porous layer PL is provided, and the porous layer PL of the second unit anodic aluminum oxide sheet  202  may be closed by the first and third unit anodic aluminum oxide sheets  201  and  203 . 
     As such, the first and third unit anodic aluminum oxide sheets  201  and  203 , which form surfaces SF including the upper and lower surfaces  180  and  190  of the lower guide plate  50 , may have a structure in which the barrier layers BL thereof are symmetrical, while the structure of the second unit anodic aluminum oxide sheet  202  provided between the first and third unit anodic aluminum oxide sheets  201  and  203  may be changed and implemented in various forms. 
     As illustrated in  FIGS.  3 ,  4 A, and  4 B , since the lower guide plate  50  may be configured so that the surfaces SF are configured as the barrier layers BL having a symmetrical structure, the upper and lower surfaces  180  and  190  of the lower guide plate  50  may have a uniform density. This may prevent the problem of warpage deformation. 
     In addition, since the surfaces SF of the lower guide plate  50  except for the lower guide holes  54  are closed by the barrier layers BL, a problem in which particles flow into the lower guide plate  50  may be prevented. 
     In addition, since inner walls of openings of the lower guide holes  54  may be positioned in the barrier layer BL having a high degree of density, durability against abrasion occurring when the probes  80  are inserted through the lower guide holes  54  may be relatively high. This may minimize the problem of particle generation occurring during the insertion of the probes  80 . 
     In the present embodiment, although only the stacking method of the lower guide plate  50  has been described for convenience of explanation, the upper guide plate  40  may have the same laminated structure as the lower guide plate  50 . 
     Referring to  FIG.  1    again, the circuit board  160  may be provided above the connection member  140  made of the anodic aluminum oxide film  101 , and the probe head  1  including the upper and lower guide plates each made of the anodic aluminum oxide film  101  may be provided below the connection member  140 . 
     The connection member  140  may be made of the anodic aluminum oxide film  101 , and thus may be configured using a plurality of unit anodic aluminum oxide sheets  200 . Specifically, the connection member  140  may be formed in the same manner as in the case of the upper and lower guide plates  40  and  50 , and may have a structure in which first to third unit anodic aluminum oxide sheets are stacked as in the case of the upper and lower guide plates  40  and  50 . However, the structure of the connection member  140  is not limited thereto. 
     In the present disclosure, the first end  150 a of the coupling member  150  may be fixed to the surface of the space transformer ST, which is the connection member  140 , and the second end  150 b thereof may be coupled to the circuit board  160 . Due to this structure, the functions of controlling flatness of the space transformer ST and supporting the space transformer ST may be simultaneously performed. This may realize an efficient structure that does not require the provision of separate components for controlling the flatness of the space transformer ST and supporting the space transformer ST. 
     In such a structure, the space transformer ST and the upper and lower guide plates  40  and  50  that are directly related to the probes  80  performing a practical probing process may be made of the same anodic aluminum oxide film  101 , thereby improving structural efficiency, while minimizing thermal deformation under a high-temperature environment. Therefore, the present disclosure may have an effect of minimizing functional errors (specifically, test errors occurring due to misalignment between the probes  80  and the probe connection pads  130  of the space transformer ST) due to thermal deformation. 
       FIG.  5    is a view schematically illustrating a modified example of the probe card illustrated in  FIG.  1   . 
     As illustrated in  FIG.  5   , a probe card  100  includes an intermediate guide plate  60  between an upper guide plate  40  and a lower guide plate  50 . Specifically, the intermediate guide plate  60  may be provided at a side of a second plate  20 . However, the position of the intermediate guide plate  60  is not limited thereto, and may be provided at a side of a first plate  10 . 
     A plurality of probes  80  may sequentially pass through the upper guide plate  40 , the intermediate guide plate  60 , and the lower guide plate  50  to be provided toward a wafer W. In this case, the probes  80  may pass through a guide plate GP in a vertical shape and then, as illustrated in  FIG.  5   , may be elastically deformed in one direction. 
     Specifically, when the vertical probes  80  pass through the guide plate GP, the intermediate guide plate  60  may be moved in one direction. Therefore, the probes  80  may be elastically deformed in conjunction with the movement of the intermediate guide plate  60 . In the present embodiment, although it is described as an example that the intermediate guide plate  60  is moved in the right direction and an intermediate portion of each of the probes  80  is deformed in the right direction thereby, the moving direction of the intermediate guide plate  60  is not limited thereto. 
     By providing the intermediate guide plate  60  between the upper guide plate  40  and the lower guide plate  50 , the probe card  100  may support the probes  80  more effectively. 
     Hereinafter, a second embodiment of the present disclosure will be described. Compared to the first embodiment, the second embodiment has a difference in the shape of a connection member. Therefore, the difference will be mainly described, and the description and reference numerals of the first embodiment will be used for the same parts. 
       FIG.  6    is a view schematically illustrating a probe card according to the second embodiment of the present disclosure. 
     Referring to  FIG.  6   , a probe card  100 ′ includes a connection member  140 ′ between a probe head  1 ′ and a circuit board  160 ′. In this case, the connection member  140 ′ is configured as an interposer. 
     An insulating part  141 ′ of the connection member  140 ′ may be made of an anodic aluminum oxide film  101 ′. In this case, the connection member  140 ′ may have a structure in which a plurality of anodic aluminum oxide sheets are stacked. 
     The connection member  140 ′ may have a plurality of through-holes  142 ′. Each of the plurality of through-holes  142 ′ is a space for allowing passage of a wire  6 ′, and the through-holes  142 ′ may be arranged at a regular interval. In addition, each of a plurality of layers of the connection member  140 ′ may have the same number of through-holes  142 ′. In the present embodiment, it is illustrated that the respective through-holes  142 ′ of the plurality of layers of the connection member  140 ′ are arranged at the same interval so as to be vertically connected to each other. However, the shape of the through-holes  142 ′ of the connection member  140 ′ is not limited thereto, and the through-holes  142 ′ of the plurality of layers of the connection member  140 ′ may be arranged at different intervals. For example, the interval between the through-holes  142 ′ of an uppermost layer of the connection member  140 ′ may be wider than that between the through-holes  142 ′ of a lowermost layer thereof. 
     In the connection member  140 ′ made of the anodic aluminum oxide film  101 ′, the through-holes  142 ′ may be formed by etching. Therefore, the connection member  140 ′ may be prevented from experiencing a problem caused by mechanical processing, and the through-holes  142 ′ may have inner walls that are vertical in a straight line. 
     The connection member  140 ′ and the circuit board  160 ′ may be electrically connected to each other through the respective wires  6 ′. Specifically, a side of the circuit board  160 ′ and a side of the connection member  140 ′ may be coupled to each other by a coupling member  150 ′, and the wires  6 ′ passing through the circuit board  160 ′ may pass through the connection member  140 ′. That is, first ends of the wires  6 ′ may be provided in the circuit board  160 ′, and second ends of the wires  6 ′ may be provided in the connection member  140 ′. In this case, the second ends of the wires  6 ′ passing through the connection member  140 ′ may be in contact with a plurality of probes  80 ′. That is, the circuit board  160 ′ and the probes  80 ′ may be electrically connected to each other through the wires  6 ′. 
     The first ends of the wires  6 ′ may be fixed to the circuit board  160 ′. For example, the first ends of the wires  6 ′ may be fixed to the circuit board  160 ′ by soldering, but a method of fixing the circuit board  160 ′ and the wires  6 ′ is not limited thereto. 
     The wires  6 ′ may pass through the circuit board  160 ′ and then through the through-holes  142 ′ of the connection member  140 ′. Specifically, the wires  6 ′ may sequentially pass through the through-holes  142 ′ of the plurality of layers of the connection member  140 ′. 
     After the wires  6 ′ pass through the through-holes  142 ′, a charging part  143 ′ may be charged in each of the through-holes  142 ′. Each of the wires  6 ′ may have a smaller thickness than each of the through-holes  142 ′, so that the wire  6 ′ may not be fixed within the through-hole  142 ′. Therefore, by charging the separate charging part  143 ′ in a space of each of the through-holes  142 ′ except for the wire  6 ′, the wire  6 ′ may be effectively fixed within the through-hole  142 ′. 
     The charging part  143 ′ may be configured as an epoxy-based adhesive to more effectively fix the wire  6 ′, but is not limited thereto. 
     The circuit board  160 ′ may have wire through-holes (not illustrated) that are arranged at a wider interval than the through-holes  142 ′ of the connection member  140 ′. Therefore, in order for the wires  6 ′ passing through the circuit board  160 ′ to pass through the through-holes  142 ′ of the connection member  140 ′, the wires  6 ′ may be provided in a form bent in one direction in a space between the circuit board  160 ′ and the connection member  140 ′. That is, the interval between the wires  6 ′ in the connection member  140 ′ may be narrower than in the circuit board  160 ′, and accordingly, the interval between the probes  80 ′ may become narrower, thereby realizing a fine pitch of the probe head  1 ′. 
     In addition, the connection member  140 ′ configured as the interposer and a guide plate GP of the probe head  1 ′ may be made of the same anodic aluminum oxide film  101 , thereby improving structural efficiency, while minimizing thermal deformation under a high-temperature environment. Therefore, the present disclosure may have an effect of minimizing functional errors (specifically, test errors occurring due to misalignment between the probes  80 ′ and the wires  6 ′ of the interposer  140 ′) due to thermal deformation. 
       FIG.  7    is a view schematically illustrating a modified example of the probe card illustrated in  FIG.  6   . 
     As illustrated in  FIG.  7   , a probe card  100 ′ includes an intermediate guide plate  60 ′ between an upper guide plate  40 ′ and a lower guide plate  50 ′. Specifically, the intermediate guide plate  60 ′ may be provided at a side of a second plate  20 ′. However, the position of the intermediate guide plate  60 ′ is not limited thereto, and may be provided at a side of a first plate  10 ′. 
     A plurality of probes  80 ′ may sequentially pass through the upper guide plate  40 ′, the intermediate guide plate  60 ′, and the lower guide plate  50 ′ to be provided toward a wafer W. In this case, the probes  80 ′ may pass through a guide plate GP in a vertical shape and then, as illustrated in  FIG.  7   , may be elastically deformed in one direction. 
     Specifically, when the vertical probes  80 ′ pass through the guide plate GP, the intermediate guide plate  60 ′ may be moved in one direction. Therefore, the probes  80 ′ may be elastically deformed in conjunction with the movement of the intermediate guide plate  60 ′. In the present embodiment, although it is described as an example that the intermediate guide plate  60 ′ is moved in the right direction and an intermediate portion of each of the probes  80 ′ is deformed in the right direction thereby, the moving direction of the intermediate guide plate  60 ′ is not limited thereto. 
     By providing the intermediate guide plate  60 ′ between the upper guide plate  40 ′ and the lower guide plate  50 ′, the probe card  100 ′ may support the probes  80 ′ more effectively. 
     While particular embodiments of the probe card according to the present disclosure have been described, it is merely illustrative and is not intended to limit the scope of the present disclosure and should be construed as having widest range based on the spirit of present disclosure. Those of ordinary skill in the art may combine and substitute the disclosed embodiments to perform a particular pattern of shape that has not been noted, but it is also within the scope of the present disclosure. It will be apparent to those of ordinary skill in the art that various changes and modifications may be readily made without departing from the spirit and scope of the present disclosure. 
     DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS 
       1 ,  1 ′: probe head  100 ,  100 ′: probe card 
       101 ,  101 ′: anodic aluminum oxide film 
       101   a ,  101   a ′: pore 
       110 : first connection member connection pad 
       120 : second connection member connection pad 
       130 : probe connection pad 
       140 ,  140 ′: connection member 
       150 ,  150 ′: coupling member  160 ,  160 ′: circuit board 
       170 : connection member  180 : upper surface 
       190 : lower surface  2 : vertical wiring part 
       20 ,  20 ′: second plate  3 : horizontal wiring part 
       40 ,  40 ′: upper guide plate 
       50 ,  50 ′: lower guide plate 
       60 ,  60 ′: intermediate guide plate 
       80 ,  80 ′: probe 
     BL: barrier layer GH: guide hole 
     GP: guide plate PL: porous layer 
     SF: surface ST: space transformer 
     W: wafer WP: electrode pad