Abstract:
A thin planar heat distributor is introduced to include a foil-like plate having a top surface with a channel pattern and an overlapping part for sealing the top surface. The channel pattern presents a radiation-and-interval arrangement and includes a plurality of fluid-conveying channels and vapor-diffusing channels. The fluid-conveying channels are formed by capillary structures for transporting the condensed fluid throughout the distributor. By providing a thinner and broader heat-absorption area and the channel pattern, the distributor can thus provide both rapid heat diffusion and installation flexibility.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a thin planar heat distributor, more particularly, to an ultra thin planar heat dissipation structure of heat pipes. 
     BACKGROUND OF THE INVENTION 
     With promotion of electronic components and equipment functions, the working power thereof is getting greater and the size thereof becomes more compact and lighter. Such a development makes a further requirement for the speed and energy of heat dissipation of the electronic components and the electronic apparatuses. 
     In the heat dissipating application of the electronic equipment, the common heat dissipating modes have a heat pipe installation, a heat dissipating fin installation and a forced-flow fan installation. However, these three heat dissipating modes become a bottleneck of the trend to component power and compact size for modern equipment. 
     Taking example by the heat dissipating mode of traditional tube-type or loop-type heat pipe installation, it has the advantages of rapid heat conduction and leading the absorbed heat to a certain direction, but it has the problems of difficult arrangement and small heat absorbing area etc. due to the structural characteristics of the heat pipe itself and restrictions on extending and bending. Hence, such a heat dissipating mode for components of high power needs arrangement of more heat pipes, which obviously violates the requirement for compact size of the machine. 
     Furthermore, taking example by the heat dissipating mode of heat dissipating fin installation, if the heat dissipation fins are installed at the periphery of the electronic equipment, more heat dissipating energy can be provided by means of the mass and surface, but the heat dissipating operation for the heat producing components of high power in machines is less benefited. If the heat dissipation fins are installed directly on the heat producing components, the heat produced by the components can rapidly conducted out, but this heat exchange mechanism is only to release the produced heat directly into the machines and has ill influences on the peripheral electronic components, and the installation of the heat dissipation fins occupying a certain room in the heat producing components is apparently difficult to achieve the requirement for the compact size of the machine. 
     Still, taking example by the heat dissipating mode of installing the forcing air current fan in the equipment or on the side thereof, an accelerating air current field is produced in the environment of the electronic components so as to rapidly remove the heat in the machine, but the heat produced from the operation of the fan itself becomes an obvious negative factor for the heat dissipation of the machine. Moreover, a much larger space is needed for installing the fan, and a sufficient air current field in the machine is also needed to result in a preferred heat dissipating effect. Apparently, the installation of the fan cannot satisfy the requirement for the compact size of the machine. 
     Therefore, the industry is eager to find out the ways to rapidly send out the produced heat in the electronic equipment, especially a compact machine, so as to prevent accumulation of the heat energy in the machine, which leads to reduction of the performance of electronic components or even breakdown. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a thin planar heat distributor to obtain the simultaneous effects of rapid heat conduction, heat dissipation and ready arrangement by means of the wide heat absorbing and dissipating faces thereof as well as the extremely thin configuration thereof. 
     The thin planar heat distributor of this invention includes a channel portion and an overlapping part for sealing the channel portion. 
     The channel portion can be a foil-like plate which has a top channel surface and a corresponding outer face. A plurality of fluid-conveying channels and vapor-diffusing channels in a predetermined radiation-and-interval arrangement are formed by a manufacturing manner on the top channel surface of the channel portion. Corresponding capillary structures are set in each fluid-conveying channel and the intersection of the fluid-conveying channels in the predetermined radiation-and-interval arrangement of this invention is the main heat absorption location of the thin planar heat distributor. 
     The top channel surface of the channel portion is sealed by the overlapping part so that the fluid-conveying channels and the vapor-diffusing channels on the channel portion form together to be a closed radiative channel network structure. 
     In this invention, a certain quantity of volatile fluid is added in the closed channel network structure. When a heat producing component is set at the heat absorption location of the thin planar heat distributor, the heat produced by the heat producing component is absorbed by the channel portion through heat conduction. The absorbed heat evaporates the fluid in the closed channel network structure to form a vapor, and the vapor is transported away from the heat absorption location through the radiative vapor-diffusing channels. The vapor far away from the heat absorption location can be heat exchanged with the surroundings through the channel portion or the overlapping part to release the heat, and the metal materials of the portion of the non-fluid-conveying channels and the non-vapor-diffusing channels can increase the effect on heat dissipation. Thus, the vapor can be condensed to form a liquid. The liquid is transported back to the original heat absorption location by means of the capillary structures in the fluid-conveying channels to carry out another heat exchange circulation. 
     In one of the examples of this invention, an indenting and protruding structure is further formed on the outer face of the channel portion so as to broaden the heat exchange area of the outer face. Preferably, the surface of the indenting and protruding structure can be roughened. 
     In one of the examples of this invention, an indenting and protruding structure is further formed on the outer face of the channel portion so as to broaden the heat exchange area of the outer face. Preferably, the surface of the indenting and protruding structure can be roughened. 
     In one of the examples of this invention, the top channel surface of the thin planar heat distributor can also be a structure treated by roughening so as to broaden the fluid contacting area on the top channel surface. 
     In one of the examples of this invention, a capillary structure block can be accumulated at the heat absorption location of the thin planar heat distributor to construct a fluid concentration region of the fluid-conveying channels. 
     In this invention, the channel portion of the thin planar heat distributor can be fabricated by etching, electroplating, punching, casting, cutting, printing or other methods suitable for forming channels on a thin plate. 
     In this invention, the channel portion of the thin planar heat distributor can be a copper foil, an aluminum foil or other heat conducting thin sheet. The overlapping part can be a copper foil, an aluminum foil, a metallic sheet, a housing sheet, or other planar structures being able to seal the top channel surface of the channel portion. 
     In this invention, the capillary structure in the fluid-conveying channels of the channel portion of the thin planar heat distributor can be a sintering article of metallic powders, a ceramic water-absorbing article or other porous materials being able to provide a capillary transporting function. 
     In one of the examples of this invention, the predetermined radiation-and-interval arrangement of the thin planar heat distributor for constructing the fluid-conveying channels and the vapor-diffusing channels includes at least one radiative network structure. Each of the radiative network structures further includes corresponding fluid-conveying channels and vapor-diffusing channels. The intersection in each radiative network structure is a heat absorbing location. Preferably, each of the radiative network structures is at least connected with another radiative network structure by at least one fluid-conveying channel, thereby the fluids between the radiative network structures can interflow. 
     In one of the examples of this invention, the channel portion of the thin planar heat distributor further includes at least one outer ring channel which is disposed outside the heat absorbing location and is used to connect at least two fluid-conveying channels. Preferably, capillary structures are set in the outer ring channel. 
     In one of the examples of this invention, the channel portion of the thin planar heat distributor further includes at least one outer ring channel which is disposed outside the heat absorbing location and is used to connect at least two vapor-diffusing channels. 
     In one of the examples of this invention, the channel portion of the thin planar heat distributor further includes a fluid-conveying channel entrance in connection with at least one of the fluid-conveying channels and a vapor-diffusing channel entrance in connection with at least one of the vapor-diffusing channels. By means of the fluid-conveying channel entrance and the vapor-diffusing channel entrance, a plurality of the thin planar heat distributors of this invention can be employed to make a convenient heat dissipating combination. 
     The heat dissipating combination of this invention includes at least one pair of thin planar heat distributors, wherein the corresponding two fluid-conveying channel entrances in each pair of the thin planar heat distributors are connected with each other by a fluid return channel and the corresponding two vapor-diffusing channel entrance thereof are connected with each other by a vapor duct, thereby the vapor and fluid of each pair of the thin planar heat distributors can interflow. 
     In one of the examples of the heat dissipating combination of this invention, the vapor duct for connecting the two vapor-diffusing channel entrances can be an adiabatic duct structure. 
     In one of the examples of the heat dissipating combination of this invention, the fluid return channel for connecting the two fluid-conveying channel entrances can have a capillary structure therein. The capillary structure is preferably a sintering article of metallic powders. 
     In one of the examples of the heat dissipating combination of this invention, at least two of the corresponding fluid return channels of the respective pairs of the thin planar heat distributors are intersected to form a fluid co-reservoir. 
     In this invention, the fluid-conveying channel and the vapor-diffusing channel can be combined to form a single channel, wherein the vapor-diffusing channel is preferably arranged in the middle of the fluid-conveying channel. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein: 
     FIG. 1A is a schematic diagram of a first embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 1B is a schematic section view of FIG. 1A along a sectional line aa; 
     FIG. 2A is a schematic diagram of a second embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 2B is a schematic section view of FIG. 2A along a sectional line bb; 
     FIG. 3 is a schematic diagram of a third embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 4A is a schematic diagram of a fourth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 4B is a schematic section view of an embodiment of FIG. 4A along a sectional line cc; 
     FIG. 4C is a schematic section view of another embodiment of FIG. 4A along a sectional line cc; 
     FIG. 5A is a schematic diagram of a fifth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 5B is a schematic section view of FIG. 5A along a sectional line dd; 
     FIG. 6 is a schematic diagram of a sixth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 7 is a schematic diagram of the channel portion of a seventh embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 8 is a schematic diagram of the channel portion of an eighth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 9 is a schematic diagram of the channel portion of a ninth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 10 is a schematic diagram of the channel portion of a tenth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 11 is a schematic diagram of the channel portion of an eleventh embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 12 is a schematic diagram of the channel portion of a twelfth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 13 is a schematic diagram illustrating an embodiment of the thin planar heat distributor of this invention applied in an ultra electronic apparatus; 
     FIG. 14 is a schematic diagram illustrating another embodiment of the thin planar heat distributor of this invention applied in an ultra electronic apparatus; 
     FIG. 15 is a schematic diagram illustrating a further embodiment of the thin planar heat distributor of this invention applied in an ultra electronic apparatus; 
     FIG. 16 is a schematic diagram of the channel portion of a thirteenth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 17 is a schematic diagram of the channel portion of a fourteenth embodiment of the thin planar heat distributor in accordance with this invention, in a top view; 
     FIG. 18 is an embodiment of employing the thin planar heat distributors of this invention; 
     FIG. 19 is another embodiment of employing the thin planar heat distributors of this invention; 
     FIG. 20A is another schematic section view of FIG. 1A along a sectional line aa; 
     FIG. 20B is a schematic enlarged view of the AAA dotted region in FIG. 20A; and 
     FIG. 21 is a schematic sectional view illustrating another material arrangement of the thin planar heat distributor in accordance with this invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The detailed description of a thin planar heat distributor in accordance with this invention is given for illustration by the following preferred embodiments. Those elements with the same functions except different configurations are denominated with the same name and are marked with the same numeral so as to facilitate consistency in explanation of the invention. 
     Please refer to FIGS. 1A and 1B, which are schematic diagrams of a first embodiment in accordance with this invention, respectively in a top view and in a sectional view along a section line aa. The thin planar heat distributor  1  of this invention includes a channel portion  20  and an overlapping part  10  for sealing the channel portion  20 . 
     The channel portion  20  can be a foil-like plate which has a top channel surface  21  and a corresponding outer face  22 . A plurality of channels  210  in a predetermined radiation-and-interval arrangement are formed by a manufacturing manner on the top channel surface  21  of the channel portion  20 . Each channel  210  further includes a fluid-conveying channel  211  formed by capillary materials and a vapor-diffusing channel  212  disposed in the fluid-conveying channel  211 . 
     The top channel surface  21  of the channel portion  20  is sealed by a bottom surface  101  of the overlapping part  10  so that the respective channels  210  (including the fluid-conveying channels  211  and the vapor-diffusing channels  212 )in the channel portion  20  form together to be a closed radiative channel network structure. 
     As shown in FIG. 1A, an intersection P is formed because of the channels  210  in the predetermined radiation-and-interval arrangement. A heat absorption location  5  for contacting a heat producing component is set at the outer face  22  of the channel portion  20  corresponding to the intersection P. Certainly, in the practice of the overlapping part  10  being a heat conductive material, where a top surface  102  of the overlapping part  10  corresponds to the intersection P is also another heat absorption location  5  at which a heat producing component can be set. 
     The so-called “predetermined radiation-and-interval arrangement” model of the channels  210  in this invention can be a linear radiative shape as shown in FIG.  1 A. In other examples, the model can be a curve, a symmetrical loop, a rose curve (rhodonea), or other similar radiative shapes having a central symmetrical characteristic. 
     In this invention, a certain quantity of volatile fluid (not shown) is added in the network structure formed by the channels  210 . When a heat producing component is set at the heat absorption location  5  of the thin planar heat distributor  1 , the heat produced by the heat producing component is absorbed by the channel portion  20 . The heat is transferred to evaporate the fluid to form a vapor and the vapor is transported away from the heat absorption location  5  by means of the vapor pressure and diffusion in the vapor-diffusing channels  212 . After the fluid in a vapor form is heat exchanged with the surroundings far away from the heat absorption location  5  (i.e. the fringe portions of the thin planar heat distributor  1 ) to release the heat, the vapor is condensed to form a liquid. The liquid is transported back to the original heat absorption location  5  by means of the capillary structures in the fluid-conveying channels  211  of the channels  210 . By means of fluid phase change circulation in the channels  210 , vapor pressure diffusion of the vapor-diffusing channels  212  and capillary transportation of the capillary structures in the fluid-conveying channels  211 , this invention can effectively and rapidly diffuse the heat produced by the heat producing component. 
     In this invention, when fabricating the thin planar heat distributor  1 , a considerably extent of a vacuum state can be formed in the channels  210  not only to ensure the close combination of the overlapping part  10  and the channel portion  20 , but also to facilitate the phase transformation of the fluid. 
     Referring to FIGS. 2A and 2B, schematic diagrams of a second embodiment in accordance with this invention, respectively in a top view and in a sectional view along a section line bb are illustrated. The thin planar heat distributor  1 , the same as the first embodiment, also includes a channel portion  20  and an overlapping part  10  for sealing the channel portion  20 . 
     In the second embodiment, the channel portion  20  also is a foil-like plate having a top channel surface  21  and a corresponding outer face  22 . However, the difference of the second embodiment from the first embodiment lies in that the fluid-conveying channel  211  and the vapor-diffusing channel  212  are reversely arranged by a topology concept in the same space of the thin planar heat distributor  1 , that is, the fluid-conveying channel  211  in the first embodiment is arranged at the outer rim of the vapor-diffusing channel  212 , but in the second embodiment, the vapor-diffusing channel  212  is reversely arranged at the outer rim of the fluid-conveying channel  211 . Hence, the channel portion  20  in the second embodiment includes a plurality of fluid-conveying channels  211  in a predetermined radiation-and-interval arrangement and vapor-diffusing channels  212  which space wraps the fluid-conveying channels  211  up. Each of the fluid-conveying channels  211  also has a corresponding capillary structure. Similarly, an intersection P formed by each of the radiative fluid-conveying channels  211  in the center part of the channel portion  20  is the main heat absorbing location  5  of the thin planar heat distributor in this invention. The employed heat diffusion principle and the application of the heat absorbing location  5  in the second embodiment is identical to those in the aforesaid first embodiment, and thus will not be reiterated herein. 
     A concave and raised structure (not shown) can be formed on the outer face  22  of the channel portion  20  of the thin planar heat distributor  1  or on the top surface  102  of the overlapping part  10  so as to broaden the heat exchange area of the outer face  22  or of the top surface  102 . Preferably, the surface of such a concave and raised structure can have a roughed treatment to provide a more preferred heat exchange area. 
     In the first and second embodiments of this invention, the intersection P of the channels  210  or of the fluid-conveying channels  211  and the heat absorbing location  5  for contacting with the heat producing component are set at the center of the heat distributor  1 . However, in the practice of this invention, the intersection P and the heat absorbing location  5  may be appropriate adjusted depending on the position of the heat producing component in the arranged space, and are not necessary to be set at the center of the arranged space. For instance, in a third embodiment of this invention derived from the first embodiment, as shown in FIG. 3, the intersection P and the heat absorbing location  5  are set at a right side of the heat distributor  1 . 
     Furthermore, referring to FIGS. 4A and 4B, schematic diagrams of a fourth embodiment in accordance with this invention, respectively in a top view and in a sectional view along a section line cc are illustrated. The difference between the fourth embodiment and the first, third embodiments resides in that more capillary structures or blocks of porous materials are accumulated at the center o the thin planar heat distributor  1  (i.e. the intersection P of the channels  210 ) to construct a main fluid concentration region  9 . In FIG. 4B, the level of the fluid concentration region  9  is arranged equal to the channel surface  21  of the channel portion  20 . In other examples, the level of the fluid concentration region  9  can be arranged lower than or extending out from the channel surface  21  of the channel portion  20 . In FIG. 4C illustrating another schematic diagram of this invention in a sectional view along a section line cc, the level of the fluid concentration region  9  is arranged higher than the channel surface  21 , that is, the material on the corresponding overlapping part  10  is removed to receive the protruding capillary structure material. 
     Please refer to FIGS. 5A and 5B, which are schematic diagrams of a fifth embodiment in accordance with this invention, respectively in a top view and in a sectional view along a section line dd. The difference between the fifth embodiment and the second embodiment resides in that more capillary structures or blocks of porous materials are accumulated at the center o the thin planar heat distributor  1  (i.e. the intersection P of the fluid-conveying channels  211 ) to construct a main fluid concentration region  9 . Similarly, the level of the fluid concentration region  9  cab be arranged equal to, lower than or extending out from the channel surface  21  of the channel portion  20 . 
     In the above-mentioned embodiments, the channel portion  20  of this invention merely has one heat absorbing location  5 . However, according to the design concept of this invention, the thin planar heat distributor  1  of this invention can have a plurality of heat absorbing locations  5  for simultaneously carrying out heat exchange operations of the heat absorbing components at the plurality of the different locations. 
     Please refer to FIG. 6, which is a schematic diagram of a sixth embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view. The predetermined radiation-and-interval arrangement of this invention for constructing the fluid-conveying channels  211  and the vapor-diffusing channels  212  includes at least one radiative network structure  100  (two radiative network structures  100  are shown in FIG.  6 ). Each of the radiative network structures  100  further includes corresponding fluid-conveying channels  211  and vapor-diffusing channels  212 . The intersection in each radiative network structure  100  is a heat absorbing location  5 . In this preferred embodiment, each of the intersections is formed as a fluid concentration region  9  and each of the radiative network structures  100  is at least connected with another radiative network structure  100  by at least one fluid-conveying channel  211 (one fluid-conveying channel  211  is shown in FIG.  6 ), thereby the fluids between the radiative network structures  100  can interflow. 
     In the sixth embodiment of FIG. 6, the vapor-diffusing channels  212  are arranged by wrapping the fluid-conveying channels  211  up (e.g. the second and fifth embodiments). In other embodiments, the construction of the channels  210  in the first, third and fourth embodiments can also be employed therein (not shown). 
     Moreover, referring to FIG. 7, which is a schematic diagram of the channel portion  20  of a seventh embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view, the difference between the seventh embodiment and the above-mentioned embodiments lies in that the vapor-diffusing channels  212  and the fluid-conveying channels  211  of the seventh embodiment are constructed by an independence-but-connection manner. The channel portion  20  of this embodiment includes at least two radiative network structures  100  (four radiative network structures  100  are shown in FIG.  7 ). The fluid-conveying channel  211  and the vapor-diffusing channel  212  are connected at a far end Q of each of the radiative network structures  100 . The heat absorbing location is set at the center surrounded by the four radiative network structures  100  (i.e. the fluid concentration region  9  as shown in FIG. 7) further includes corresponding. 
     The seventh embodiment of this invention, as shown in FIG. 7, can be deemed as a modification of the fourth embodiment, wherein these two embodiments have the fluid-conveying channels  211  and the vapor-diffusing channels  212 . In the fourth embodiment as shown in FIG. 4A, the channel  210  is composed by the fluid-conveying channel  211  and the vapor-diffusing channel  212  in a telescoping manner, wherein the fluid-conveying channel  211  is arranged as a sheath of the vapor-diffusing channel  212 . In the seventh embodiment as shown in FIG. 7, the fluid-conveying channel  211  and the vapor-diffusing channel  212  are combined, in a manner of “independence arrangement but connection at a far end,” to be a part of a radiative network structure  100 . 
     Referring to FIG. 8, which is a schematic diagram of the channel portion  20  of an eighth embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view, as the same as the seventh embodiment, the vapor-diffusing channels  212  and the fluid-conveying channels  211  of the eighth embodiment are constructed by an independence-but-connection manner. The channel portion  20  of this embodiment includes a plurality of radiative network structures  100  (four radiative network structures  100  are shown in FIG.  8 ). In each of the radiative network structures  100 , the fluid-conveying channel  211  and the vapor-diffusing channel  212  are connected at two ends thereof so as to form a looped radiative network structure  100 , wherein each radiative network structure  100  is apparently located at the radiative fringe in relation to the heat absorbing location of the thin planar heat distributor. As shown in FIG. 8, the heat absorbing location  5  of the eighth embodiment is set at the center surrounded by the four radiative network structures  100  and a fluid concentration region  9  is formed therein. In this invention, the channel portion  20  of the thin planar heat distributor further includes at least one outer ring channel  23  which is disposed at the outer periphery of the four radiative network structures  100  and is used to connect at least two fluid-conveying channels  211  (the outer ring channel  23  shown in FIG. 8 is used to connect all the fluid-conveying channels  211 ). 
     In the embodiment of FIG. 8, the outer ring channel  23  is formed by the structure of the fluid-conveying channels  211 , that is, the outer ring channel  23  has capillary structures to carry out the fluid capillary transporting function. In a ninth embodiment of this invention as shown in FIG. 9, the outer ring channel  23  is constructed in the same manner as the vapor-diffusing channel  212  so as to connect at least two vapor-diffusing channels  212 . 
     In the above-mentioned embodiments of FIGS. 7 to  9 , the fluid-conveying channels  211  and the vapor-diffusing channels  212  in the radiative network structure  100  can be in a staggered (i.e. equi-weighting) arrangement (as shown in FIGS.  7  and  8 ), or be arranged with all the fluid-conveying channels  211  in one side and all the vapor-diffusing channels  212  in the other side (as shown in FIG. 9) or in other similar types of arrangement, depending on working conditions. Similarly, in the practice of this invention, the radiative network structures  100  are unnecessary to be arranged with the same and symmetrical types. For instance, in certain conditions, the outline of the thin planar heat distributor can be designed around or modified according to a particular applied position, and certainly, the arrangement of the fluid-conveying channels  211 , the vapor-diffusing channels  212 , the radiative network structures  100 , and the outer ring channel  23  should also be modified. 
     In this invention, the design of the outer ring channel  23  can be employed in the thin planar heat distributor having a plurality of radiative network structures  100 , such as in the eighth and ninth embodiments. In other examples, the outer ring channel  23  can also be employed in the first to seventh embodiments. 
     Referring to FIG. 10, which is a schematic diagram of the channel portion  20  of a tenth embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view, the vapor-diffusing channels  212  and the fluid-conveying channels  211  are independently arranged, and the outer ring channel  23  having capillary structures are used to connect the ends of each vapor-diffusing channel  212  and each fluid-conveying channel so that the fluids of the channels can interflow. 
     Referring to FIG. 11, which is a schematic diagram of the channel portion  20  of an eleventh embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view, the difference between the eleventh embodiment and the tenth embodiment lies in that the vapor-diffusing channels  212  and the fluid-conveying channels  211  are both independently arranged and spaced, and the outer ring channel  23  having capillary structures for connecting the ends of each vapor-diffusing channel  212  and each fluid-conveying channel is constructed in the same manner as the vapor-diffusing channel  212 . 
     Referring to FIG. 12, which is a schematic diagram of the channel portion  20  of a twelfth embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view, the difference between the twelfth embodiment and the tenth, eleventh embodiment lies in that the vapor-diffusing channels  212  and the fluid-conveying channels  211  are arranged in the same manner as the channel  210  of the first embodiment, that is, the vapor-diffusing channels  212  are constructed in the fluid-conveying channels  211 , and the outer ring channel  23  is constructed in the same manner as the vapor-diffusing channel  212 . 
     In this invention, the shape of the thin planar heat distributor can be square (such as the first to eleventh embodiments), circular (such as the twelfth embodiment) or other usable shapes. 
     Please refer to FIG. 13, which is a schematic diagram of the thin planar heat distributor  1  of this invention applied in an ultra electronic apparatus  33 . A heat producing component  332  on a printed circuit board  331  inside the apparatus housing  330  is directly set at the heat absorbing location  5  of the thin planar heat distributor  1 , wherein the heat absorbing location  5  is practiced in an eccentric mode of the third embodiment), thereby the heat produced by the heat producing component  332  can be rapidly transported to the edges of the housing  330  to dissipate. Moreover, since the structure of this invention can be fabricated with a thin thickness, the inner structural space of the electronic apparatus  33  is less influenced. 
     Please refer to FIG. 14, which is a schematic diagram illustrating another embodiment of the thin planar heat distributor  1  of this invention applied in an ultra electronic apparatus  33 . Two heat producing components  332  on a printed circuit board  331  are indirectly set at the respective heat absorbing locations  5  of the thin planar heat distributor  1  through two intermediate heat conducting blocks  333  for carrying out the heat exchange operation, wherein the two heat absorbing locations  5  are practiced in the same mode as the sixth embodiment), thereby the heat produced by the heat producing component  332  can be rapidly dissipated. In the other embodiments, the heat conducting blocks  333  can be replaced by partial bending of the heat distributor  1  of this invention since the thickness of the heat distributor  1  is extremely thin to have a good bending effect. Moreover, since the capillary structure is employed, the fluid transporting effect of the fluid-conveying channels  211  will not be affected under the bending condition. 
     Please refer to FIG. 15, which is a schematic diagram illustrating a further embodiment of the thin planar heat distributor  1  of this invention applied in an ultra electronic apparatus  33 . The thin planar heat distributor  1  is directly set at the bottom of the printed circuit board  331 . Since the thickness of the heat distributor  1  is extremely thin, the arrangement of the other components of the housing  330  will not be affected. 
     In this invention, the channel portion  20  of the thin planar heat distributor  1  can be a copper foil, an aluminum foil or other heat conducting thin metallic sheet. The overlapping part  10  can be a copper foil, an aluminum foil, a metallic sheet, a housing sheet (on which the channel portion  20  is directly stuck), or other planar structures being able to seal the top channel surface  21  of the channel portion  20 . 
     In this invention, the channel portion  20  of the thin planar heat distributor  1  can be fabricated by etching, electroplating, punching, casting, cutting or other methods suitable for forming channels on a thin plate. 
     In this invention, the capillary structure  30  in the fluid-conveying channels  211  of the channel portion  20  of the thin planar heat distributor  1  can be a sintering article of metallic powders, a ceramic water-absorbing article or other porous materials being able to providing a capillary transporting function. 
     In the aforesaid embodiments of this invention, the thin planar heat distributor  1  is practiced in a manner of a single piece. However, the thin planar heat distributor  1  can also be practiced in a manner of a loop. 
     Referring to FIG. 16, which is a schematic diagram of the channel portion  20  of a thirteenth embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view, the major structural difference between the thirteenth embodiment and the first embodiment resides in that the channel portion  20  further includes a fluid-conveying channel entrance  2110  in connection with at least one of the fluid-conveying channels  211  of the channel  210  (In FIG. 16, the fluid-conveying channel entrance  2110  is connected with a larger fluid-conveying channel  211 ) and a vapor-diffusing channel entrance  2120  in connection with at least one of the vapor-diffusing channels  212  of the channel  210 . By means of the fluid-conveying channel entrance  2110  and the vapor-diffusing channel entrance  2120 , a plurality of the thin planar heat distributors of this invention can be employed to make a convenient heat dissipating combination. 
     Referring to FIG. 17, which is a schematic diagram of the channel portion  20  of a fourteenth embodiment of the thin planar heat distributor  1  in accordance with this invention in a top view, the major structural difference between the thirteenth embodiment and the fifth embodiment resides in that the channel portion  20  further includes a fluid-conveying channel entrance  2110  in connection with at least one of the fluid-conveying channels  211  (In FIG. 17, the fluid-conveying channel entrance  2110  is connected with a larger fluid-conveying channel  211 ) and a vapor-diffusing channel entrance  2120  in connection with at least one of the. vapor-diffusing channels  212 . By means of the fluid-conveying channel entrance  2110  and the vapor-diffusing channel entrance  2120 , a plurality of the thin planar heat distributors of this invention can be employed to make a convenient heat dissipating combination. 
     Please refer to FIG. 18, which is a heat dissipating combination employing the thin planar heat distributors having the channel entrances of the thirteenth or fourteenth embodiment. The heat dissipating combination as shown in FIG. 18 includes two thin planar heat distributors  1 . The two fluid-conveying channel entrances  2110  of the two thin planar heat distributors  1  are connected with each other by a fluid return channel  7  and the two vapor-diffusing channel entrance  2120  thereof are connected with each other by a vapor duct  6 , thereby the vapor and fluid of one pair of the thin planar heat distributors  1  can interflow. As shown in FIG. 18, the heat absorbing location  5  of the lower thin planar heat distributor  1  can be employed as a heat absorbing article in this heat dissipating combination, and the upper thin planar heat distributor  1  can be employed as a means for heat dissipation. Certainly, in another employment, the two thin planar heat distributors  1  can also be respectively disposed on the corresponding heat producing components. 
     Basically, the heat dissipating combination of this invention includes at least one pair of thin planar heat distributors  1 , wherein the corresponding two fluid-conveying channel entrances  2110  in each pair of the thin planar heat distributors  1  are connected with each other by a fluid return channel  7  and the corresponding two vapor-diffusing channel entrance  2120  thereof are connected with each other by a vapor duct  6 , thereby the vapor and fluid of each pair of the thin planar heat distributors  1  can interflow. 
     Please refer to FIG. 19, which is a schematic diagram of another heat dissipating combination of this invention, wherein the heat dissipating combination includes two pairs of the thin planar heat distributors  1  and the fluid return channels  7  of these two pairs of the thin planar heat distributors  1  are intersected to form a fluid co-reservoir  8  of this heat dissipating combination. 
     In the heat dissipating combination of this invention, the vapor duct  6  for connecting the two vapor-diffusing channel entrances  2120  is preferably an adiabatic duct structure, thereby to maintain the transporting pressure of the vapor in the duct. 
     In the heat dissipating combination of this invention, the fluid return channel  7  for connecting the two fluid-conveying channel entrances  2110  preferably has a capillary structure therein. The capillary structure is preferably a sintering article of metallic powders. Certainly, the fluid co-reservoir  8  is preferably constructed by a capillary structure block. 
     In this invention, the capillary structure employed in the fluid-conveying channel  211  is preferably constructed by porous materials. However, in other employments as shown in FIGS. 20A and 20B, the capillary structure of the fluid-conveying channel  211  can also be constructed by roughening the wall  2121  of the vapor-diffusing channel  212 . By means of the formed micro-indenting and protruding structures and the liquid adhesion, the liquid fluid is transported. 
     In the above-mentioned embodiments of this invention, the outer ring channel  23  is apparently arranged to be co-used by the fluid-conveying channels  211 , the vapor-diffusing channels  212  and the channels  210 . However, connecting part of channels by one outer ring channel  23 , or arranging more outer ring channels  23  can also be practiced. 
     In the above-mentioned embodiments of this invention, the outer ring channel  23 , the fluid-conveying channel  211  and the vapor-diffusing channels  212  the channel  210  can be respectively replaced by the channel  210  having both functions of transporting liquid and vapor, without greatly affecting the function of the original thin planar heat distributor  1 . 
     In this invention, the channel portion  20  and the overlapping part  10  of each of the above-mentioned embodiments are respectively processed with one sheet. However, in other practices, the channel portion  20  and the overlapping part  10  can also be processed with more sheets and then be assembled as a whole. For instance, as shown in FIG. 21, the channel portion  20  is constructed by a bottom sheet  201  stacked with a clipping sheet  202 . Such a construction can facilitate the fabrication of the clipping sheet  202  with a more convenient manner such as punch processing. 
     As is understood by a person skilled in the art, the foregoing preferred embodiments of the present invention are illustrated of the present invention rather than limiting of the present invention. It is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structure.