WO2014136841A1 - 熱電変換装置およびその製造方法 - Google Patents
熱電変換装置およびその製造方法 Download PDFInfo
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- WO2014136841A1 WO2014136841A1 PCT/JP2014/055635 JP2014055635W WO2014136841A1 WO 2014136841 A1 WO2014136841 A1 WO 2014136841A1 JP 2014055635 W JP2014055635 W JP 2014055635W WO 2014136841 A1 WO2014136841 A1 WO 2014136841A1
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- thermoelectric conversion
- surface pattern
- back surface
- conversion element
- alloy
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/81—Structural details of the junction
- H10N10/817—Structural details of the junction the junction being non-separable, e.g. being cemented, sintered or soldered
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/01—Manufacture or treatment
Definitions
- the present invention relates to a thermoelectric conversion device in which a thermoelectric conversion element and a wiring pattern are electrically and mechanically connected, and a method of manufacturing the same.
- thermoelectric conversion device As a thermoelectric conversion device of this type, a plurality of thermoelectric conversion elements are disposed between an upper substrate and a lower substrate, and the plurality of thermoelectric conversion elements are formed via wiring patterns and solder formed on the upper substrate and the lower substrate. Electrically and mechanically connected ones have been proposed (see, for example, Patent Document 1).
- thermoelectric conversion device a laminated film in which Ni, Pd, Pt, Nb, Cr, Ti and the like are laminated is formed on the wiring pattern. And, the laminated film is joined to the solder.
- the adjacent thermoelectric conversion elements are hollow.
- the wettability of the solder can be improved by the laminated film, and the solder and the wiring pattern can be strongly joined. Further, by disposing a laminated film in which Ni, Pd, Pt, Nb, Cr, Ti and the like are laminated between the thermoelectric conversion element and the solder, the solder and the thermoelectric conversion element can be firmly joined.
- thermoelectric conversion device is manufactured as follows. First, a thermoelectric conversion element formed by sintering or the like is prepared, and a laminated film is formed in a portion in contact with the solder. Further, while forming a wiring pattern on the lower substrate and the upper substrate, respectively, a laminated film is formed on the wiring pattern. Then, the thermoelectric conversion element is disposed on the lower substrate via the solder, and the upper substrate is disposed on the thermoelectric conversion element via the solder. Thereafter, solder reflow or the like is performed, and the laminated film and the thermoelectric conversion element are electrically and mechanically connected via the solder.
- thermoelectric conversion device solder is used, and a laminated film for improving the wettability of the solder is also required. For this reason, there is a problem that the number of parts increases and the structure becomes complicated, and the cost becomes high.
- An object of the present invention is to provide a thermoelectric conversion device capable of electrically and mechanically connecting a thermoelectric conversion element and a wiring pattern with a simple configuration, and a method of manufacturing the same.
- an insulating substrate (10) having a plurality of via holes (11, 12) penetrating in a thickness direction, and a plurality of vias disposed in the via holes
- the thermoelectric conversion element (40, 50) formed of an alloy in which metal atoms maintain a predetermined crystal structure, and the surface (10a) of the insulating substrate are electrically connected to the predetermined thermoelectric conversion element
- a thermoelectric conversion device comprising: a surface pattern (21), and a back surface pattern (31) disposed on the back surface (10b) of the insulating base material and electrically connected to a predetermined thermoelectric conversion element.
- an alloy layer (71) is formed, in which metal atoms constituting the thermoelectric conversion element and metal atoms constituting the surface pattern are diffused.
- an alloy layer (72) is formed, in which metal atoms constituting the thermoelectric conversion element and metal atoms constituting the back surface pattern are diffused, and the thermoelectric conversion element, surface pattern and back surface pattern And are connected electrically and mechanically via the alloy layer.
- the alloy layer formed in the interface of a thermoelectric conversion element, surface pattern, and back surface pattern is formed with the metal atom which comprises a thermoelectric conversion element, surface pattern, and back surface pattern. That is, it is not necessary to arrange another member at the interface between the thermoelectric conversion element and the front surface pattern and the rear surface pattern. For this reason, the configuration can be simplified by reducing the number of parts, and consequently the cost can be reduced.
- thermoplastic resin is included, a plurality of via holes (11, 12) penetrating in the thickness direction are formed, and a plurality of metal atoms are formed in the via holes.
- a surface protection member (20) having a surface pattern (21) in contact with a predetermined conductive paste, and a back surface pattern (31) in contact with the predetermined conductive paste on the back surface (10b) of the insulating base Forming a laminate (90) by disposing the back surface protection member (30) having the above structure) and applying pressure from the lamination direction while heating the laminate to form a thermoelectric conversion element (40, 50) from the conductive paste
- the Metal atoms forming the thermoelectric conversion element and metal atoms forming the surface pattern are diffused to form an alloy layer (71), and metal
- the alloy layer is formed at the interface between the thermoelectric conversion element and the surface pattern and the back surface pattern. For this reason, when pressurized, it can suppress that a thermoelectric conversion element breaks.
- thermoplastic resin is included, a plurality of via holes (11, 12) penetrating in a thickness direction are formed, and thermoelectric conversion elements (40, 50) are formed in the via holes.
- thermoelectric conversion element Forming a laminate (90) by disposing a back surface protection member (30) having a back surface pattern (31) in contact with a predetermined thermoelectric conversion element on the back surface (10b) of the insulating substrate While heating, pressure is applied from the stacking direction to form an alloy layer (71) formed by diffusion of metal atoms constituting the thermoelectric conversion element and metal atoms constituting the surface pattern, and metal atoms constituting the thermoelectric conversion element And an alloy layer (72) formed by diffusion of metal atoms constituting the back surface pattern, and electrically and mechanically connecting the thermoelectric conversion element and the front surface pattern and the back surface pattern through the alloy layer
- a manufacturing method comprising the
- thermoelectric conversion element since the thermoelectric conversion element is embedded in the via hole formed in the insulating substrate, in the integration step, the component in the direction perpendicular to the laminating direction in the stress generated in the thermoelectric conversion element is offset by the insulating substrate it can. For this reason, it is possible to suppress the thermoelectric conversion element from being broken in the direction perpendicular to the stacking direction.
- the through hole (void) (13) is formed in the insulating base material, and in the integration step, the thermoelectric resin is made to flow into the void while the thermoelectric A conversion element and an alloy layer can be formed.
- a member including a thermoplastic resin is used as the surface protection member and the back surface protection member, and in the integration step, a portion facing the surface of the insulating base and an insulating group
- the laminated body is pressurized using a pair of press plates (100) in which a depressed portion (100a) is formed in at least one of the portions facing the back surface of the material to form a surface protection member and a back surface protection member
- the thermoelectric conversion element and the alloy layer can be formed while causing at least one to flow into the recess and flowing the thermoplastic resin that constitutes the insulating base material.
- the pressure applied to the conductive paste can be increased in the integration step, and the alloy layer can be easily formed between the thermoelectric conversion element and the surface pattern and the back surface pattern.
- FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
- FIG. 3 is a cross-sectional view taken along the line III-III in FIG. It is an enlarged view of the area
- FIG. 5 shows the manufacturing conditions in the case of the integration process shown in FIG.5 (h). It is sectional drawing of the thermoelectric conversion apparatus in 2nd Embodiment of this invention.
- FIG.5 (d) shows the process performed after FIG.5 (d) in 3rd Embodiment of this invention. It is a surface view of the insulation base material shown in FIG. It is a detailed sectional view at the time of performing the process of FIG.5 (h) using the insulation base material shown in FIG. It is detailed sectional drawing at the time of performing the process of FIG. 5 (h) in 4th Embodiment of this invention. It is sectional drawing which shows the manufacturing process of the thermoelectric conversion apparatus in 5th Embodiment of this invention. It is a figure which shows the manufacturing conditions in the case of the unification process shown in FIG.12 (f).
- thermoelectric conversion device 1 of the present embodiment the insulating base 10, the surface protection member 20, and the back surface protection member 30 are integrated, and different metals are contained in the integrated unit.
- the first and second interlayer connection members 40 and 50 are alternately connected in series.
- FIG. 1 the surface protection member 20 is omitted for easy understanding.
- FIG. 1 is not a cross-sectional view, the first and second interlayer connection members 40 and 50 are hatched. And in this embodiment, the 1st and 2nd interlayer connection members 40 and 50 correspond to the thermoelectric conversion element of the present invention.
- the insulating base 10 is made of a flat rectangular thermoplastic resin film containing polyetheretherketone (PEEK) or polyetherimide (PEI). Further, in the insulating base 10, a plurality of first and second via holes 11 and 12 penetrating in the thickness direction are formed in a staggered pattern so as to be alternately arranged.
- PEEK polyetheretherketone
- PEI polyetherimide
- the first and second via holes 11 and 12 have a cylindrical shape having a constant diameter from the front surface 10a to the rear surface 10b, but the first and second via holes 11 and 12 have front surfaces.
- the diameter may be tapered from 10a toward the back surface 10b, or may be rectangular.
- a first interlayer connection member 40 is disposed in the first via hole 11, and a second interlayer connection member 50 which is a dissimilar metal to the first interlayer connection member 40 is disposed in the second via hole 12. That is, in the insulating base material 10, the first and second interlayer connection members 40 and 50 are arranged alternately.
- the first interlayer connection member 40 is formed of a conductive paste containing a powder (metal particles) of a Bi—Sb—Te alloy constituting a P-type.
- the second interlayer connection member 50 is formed of a conductive paste containing a powder (metal particles) of a Bi—Te alloy constituting an N-type.
- a surface protection member 20 made of a flat rectangular thermoplastic resin film containing polyetheretherketone (PEEK) or polyetherimide (PEI) is disposed on the surface 10a of the insulating base material 10.
- the surface protecting member 20 has the same size as that of the insulating base 10, and a plurality of surface patterns 21 patterned with copper foil or the like are separated from each other on the side of the surface 20a facing the insulating base 10. It is formed as.
- Each surface pattern 21 is appropriately electrically connected to the first and second interlayer connection members 40 and 50, respectively.
- first and second interlayer connecting members 40, 50 of each set 60 have the same surface. It is connected to the pattern 21. That is, the first and second interlayer connection members 40 and 50 of each set 60 are electrically connected via the surface pattern 21.
- a pair 60 of one first interlayer connecting member 40 and one second interlayer connecting member 50 adjacent along the long side direction of the insulating base material 10 (the left and right direction in FIG. It is done.
- connection structure between the first and second interlayer connection members 40 and 50 and the surface pattern 21 will be described.
- metal atoms (Te) in the first and second interlayer connection members 40 and 50 are provided at the interface (between) the first and second interlayer connection members 40 and 50 and the surface pattern 21.
- a Cu—Te based alloy layer 71 configured by diffusion of metal atoms (Cu) in the surface pattern 21 is formed.
- the first and second interlayer connection members 40 and 50 and the surface pattern 21 are electrically and mechanically connected through the alloy layer 71.
- the composition of the alloy layer 71 is Cu-Te
- the alloy layer 71 may be formed of, for example, Cu--based on the compounding ratio of the powder of the alloy forming the first and second interlayer connection members 40 and 50. You may comprise by Bi type
- a flat rectangular back surface protection member 30 made of a thermoplastic resin film containing polyetheretherketone (PEEK) or polyetherimide (PEI) is disposed on the back surface 10b of the insulating base material 10.
- the back surface protection member 30 has the same size as that of the insulating base 10, and a plurality of back surface patterns 31 patterned with copper foil or the like are separated from each other on the side 30a facing the insulating base 10. It is formed as.
- Each back surface pattern 31 is appropriately electrically connected to the first and second interlayer connection members 40 and 50, respectively.
- the first interlayer connection member 40 of one set 60 and the second interlayer connection member 50 of the other set 60 are connected to the same back surface pattern 31. That is, the first and second interlayer connection members 40 and 50 are electrically connected via the back surface pattern 31 across the pair 60.
- FIG. 2 basically, a pair 60 in which two pairs 60 aligned along the long side direction (the left and right direction in FIG. 1) of the insulating substrate 10 are adjacent to each other It is done. Further, as shown in FIG. 3, at the outer edge of the insulating base material 10, two sets 60 aligned along the short side direction (vertical direction in the drawing of FIG. 1) are set as a set 60 adjacent to each other.
- first and second interlayer connection members 40 and 50 are alternately connected in series alternately in the long side direction of the insulating base material 10 and folded back, and then alternately connected in series in the long side direction. That is, the first and second interlayer connection members 40 and 50 are alternately connected in series in a broken line shape.
- connection structure between the first and second interlayer connection members 40 and 50 and the back surface pattern 31 will be described.
- FIG. 4 between the first and second interlayer connection members 40 and 50 and the surface pattern 21 at the interface (between) the first and second interlayer connection members 40 and 50 and the back surface pattern 31.
- the first and second interlayer connection members 40 and 50 and the back surface pattern 31 are electrically and mechanically connected to each other through the alloy layer 72.
- the alloy layer 72 is formed of a Cu—Te-based alloy
- the alloy layer 72 may be formed of, for example, Cu— depending on the compounding ratio of the powder of the alloy forming the first and second interlayer connection members 40 and 50. You may comprise by Bi type
- the back surface protection member 30 is electrically connected to the back surface pattern 31 and exposed from one surface of the back surface protection member 30 opposite to the insulating base 10 side.
- An interlayer connecting member is formed.
- the back surface pattern 31 can be electrically connected to the outside through the interlayer connection member.
- thermoelectrical conversion device 1 in this embodiment.
- a method of manufacturing the thermoelectric conversion device 1 will be described with reference to FIG. 5 is a cross-sectional view taken along the line II-II in FIG.
- the insulating base material 10 is prepared, and the plurality of first via holes 11 are formed by a drill or the like.
- each first via hole 11 is filled with the first conductive paste 41.
- the insulating base 10 is disposed on a holding table (not shown) via the suction paper 80 so that the back surface 10 b faces the suction paper 80.
- the adsorption paper 80 should just be a thing of the material which can absorb the organic solvent of the 1st electroconductive paste 41, and general quality paper etc. are used. Then, the first conductive paste 41 is filled in the first via hole 11 while the first conductive paste 41 is melted. As a result, most of the organic solvent of the first conductive paste 41 is adsorbed to the adsorbing paper 80, and the powder of the alloy is disposed in close contact with the first via hole 11.
- the first conductive paste 41 a powder of an alloy in which metal atoms maintain a predetermined crystal structure is used as a paste by adding an organic solvent such as paraffin having a melting point of 43 ° C. Be For this reason, when the first conductive paste 41 is filled, the surface 10a of the insulating base 10 is heated to about 43 ° C. Note that, for example, Bi—Sb—Te or the like formed by mechanical alloying is used as a powder of an alloy constituting the first conductive paste 41.
- a plurality of second via holes 12 are formed in the insulating base 10 by a drill or the like. As described above, the second via holes 12 are alternately formed with the first via holes 11 so as to form a staggered pattern together with the first via holes 11.
- the insulating base material 10 is again disposed on a holding table (not shown) via the suction paper 80 so that the back surface 10b faces the suction paper 80.
- the second conductive paste 51 is filled in the second via hole 12 in the same manner as when the first conductive paste 41 is filled.
- most of the organic solvent of the second conductive paste 51 is adsorbed to the adsorbing paper 80, and the powder of the alloy is disposed in close contact with the second via hole 12.
- the second conductive paste 51 in the present embodiment, a powder of an alloy in which metal atoms different from the metal atoms constituting the first conductive paste 41 maintain a predetermined crystal structure, has a melting point of ordinary temperature, etc. What added the organic solvent of and made it into paste is used. That is, as the organic solvent constituting the second conductive paste 51, one having a melting point lower than that of the organic solvent constituting the first conductive paste 41 is used. And when filling the 2nd conductive paste 51, it is performed in the state where surface 10a of insulating substrate 10 was kept at normal temperature. In other words, in the state where the organic solvent contained in the first conductive paste 41 is solidified, the filling of the second conductive paste 51 is performed. Thereby, the mixing of the second conductive paste 51 into the first via hole 11 is suppressed.
- a powder of an alloy constituting the second conductive paste 51 for example, a Bi—Te based powder or the like formed by mechanical alloy is used.
- the insulating base 10 filled with the first and second conductive pastes 41 and 51 is prepared.
- Form copper foil etc. by appropriately patterning this copper foil, a surface protection member 20 on which a plurality of surface patterns 21 separated from each other is formed, and a back surface protection member 30 on which a plurality of back surface patterns 31 separated from each other are formed prepare.
- the back surface protection member 30, the insulating base 10, and the surface protection member 20 are sequentially laminated to form a laminate 90.
- an insulating group is used.
- the surface protection member 20 is disposed on the surface 10 a side of the material 10 in a state where the first and second conductive pastes 41 and 51 of each pair 60 are in contact with the same surface pattern 21.
- a pair 60 of second conductive pastes 51 filled in the two second via holes 12 is formed.
- the back surface protection member 30 is disposed.
- the two sets 60 aligned along the long side direction (the left and right direction in FIG. 1) of the insulating base material 10 are the set 60 adjacent to each other. Further, at the outer edge of the insulating base 10, two sets 60 aligned along the short side direction are set as adjacent sets 60.
- the laminate 90 is disposed between a pair of press plates (not shown), and pressure is applied while heating in vacuum from both upper and lower sides in the laminating direction to integrate the laminate 90.
- a buffer material such as rock wool paper may be disposed between the laminate 90 and the press plate.
- the laminate 90 is heated to about 320 ° C. and pressurized at 0.1 Mpa to time T 1, and is contained in the first and second conductive pastes 41 and 51. Evaporate the organic solvent.
- the period between T0 and T1 is about 10 minutes.
- the organic solvents contained in the first and second conductive pastes 41 and 51 are organic solvents remaining without being adsorbed to the adsorption paper 80 in the steps of FIGS. 5B and 5D. It is.
- the first and second interlayer connection members 40 and 50 are configured by pressure welding alloy powders and solid phase sintering.
- the first and second interlayer connection members 40 and 50 are formed of a sintered alloy which is sintered in a state where a plurality of metal atoms (powder of alloy) maintain the crystal structure of the metal atoms.
- the powder of the alloy is pressed against the surface pattern 21 and the back surface pattern 31, and the first and second interlayer connection members 40 are formed at the interface between the first and second interlayer connection members 40 and 50 and the surface pattern 21 and the back surface pattern 31.
- 50 and metal atoms constituting the surface pattern 21 or the back surface pattern 31 diffuse to form alloy layers 71, 72.
- the first and second interlayer connection members 40 and 50 are electrically and mechanically connected to the surface pattern 21 and the back surface pattern 31 via the alloy layers 71 and 72.
- the period between T1 and T2 is about 10 minutes.
- a Bi—Sb—Te based powder is used as a powder of an alloy contained in the first conductive paste 41, and a Bi—Te based powder is used as a powder of an alloy contained in the second conductive paste 51. Powder is used. Since the melting point of these alloys is higher than 320 ° C., the powders of the alloys contained in the first and second conductive pastes 41 and 51 are not melted in this step.
- the laminate 90 is integrated by cooling down to time T3 while maintaining the pressure of 10 MPa, and the thermoelectric conversion device 1 shown in FIG. 1 is manufactured.
- the period between T2 and T3 is about 8 minutes.
- metal materials constituting the surface pattern 21, the back surface pattern 31, the first and second interlayer connection members 40 and 50, and the alloy layers 71 and 72 include the insulating base 10, the surface protection member 20 and the back surface protection member 30.
- the coefficient of linear expansion is smaller than that of the constituting thermoplastic resin. Therefore, the expansion and contraction of the metal materials constituting the surface pattern 21, the back surface pattern 31, the first and second interlayer connection members 40 and 50, and the alloy layers 71 and 72 are performed by the insulating base 10 and the surface protection member 20. It is smaller than the expansion and contraction of the thermoplastic resin constituting the back surface protection member 30.
- thermoelectric conversion device 1 As described above, the surface pattern 21, the back surface pattern 31, the first and second interlayer connection members 40 and 50, the alloy layers 71 and 72, the insulating base 10, the surface protection The thermoelectric conversion device 1 is manufactured in a state in which stress is applied from the thermoplastic resin constituting the member 20 and the back surface protection member 30.
- the connection between the first and second interlayer connection members 40 and 50 and the alloy layers 71 and 72, the surface pattern 21 and the back surface pattern 31 and the alloy layer 71 The thermoelectric conversion device 1 in which the connection with the element 72 is firmly maintained is manufactured.
- the first and second interlayer connection members 40 and 50, and the surface pattern 21 and the back surface pattern 31 electrically and mechanically via the alloy layers 71 and 72. It is connected to the. For this reason, it is not necessary to use a solder or to form a laminated film necessary for using a solder.
- the alloy layers 71 and 72 formed at the interface between the first and second interlayer connection members 40 and 50 and the surface pattern 21 and the back surface pattern 31 are the first and second interlayer connection members 40 and 50 and the surface pattern 21. And it is comprised by the metal atom which comprises the back surface pattern 31.
- first and second interlayer connection members 40 and 50 are formed by pressurizing while heating the first and second conductive pastes 41 and 51, and the first and second interlayer connection members 40 and 50
- the alloy layers 71 and 72 are formed at the interface between the surface pattern 21 and the back surface pattern 31. For this reason, it can suppress that the 1st, 2nd interlayer connection members 40 and 50 are broken when it pressurizes.
- the alloy layers 71 and 72 are simultaneously formed when forming the first and second interlayer connection members 40 and 50 from the first and second conductive pastes 41 and 51, only the alloy layers 71 and 72 can be used. There is no need for a manufacturing process for forming, and the number of manufacturing processes is not increased.
- a powder of a Bi-Sb-Te-based alloy is used as the first conductive paste 41 and a powder of a Bi-Te-based alloy is used as the second conductive paste 51 has been described.
- the powder of the alloy is not limited to these.
- copper, constantan, chromel, alumel, etc. are appropriately selected from those alloyed with iron, nickel, chromium, copper, silicon, etc. as powder of the alloy constituting the first and second conductive pastes 41, 51.
- an alloy of tellurium, bismuth, antimony, selenium, an alloy of silicon, iron, aluminum, or the like may be appropriately selected.
- Second Embodiment A second embodiment of the present invention will be described.
- the present embodiment is the same as the first embodiment except that a plating film is formed on the surface pattern 21 and the back surface pattern 31 in the first embodiment, and therefore the description is omitted here.
- the surface pattern 21 is configured by the base wiring 21a and the plating film 21b formed on the base wiring 21a.
- the back surface pattern 31 is constituted by the base wiring 31a and the plating film 31b formed on the base wiring 31a.
- the plating films 21b and 31b are made of Ni.
- Ni—Te based alloy layers 71 and 72 are formed by diffusion of metal atoms (Ni) of The first and second interlayer connection members 40 and 50 and the surface pattern 21 or the back surface pattern 31 are electrically and mechanically connected via the alloy layers 71 and 72.
- FIG. 7 corresponds to an enlarged view of the area A in FIG.
- the alloy layers 71 and 72 are composed of Ni—Te based alloys
- the alloy layer 71 may be formed, for example, according to the compounding ratio of the powder of the alloy constituting the first and second interlayer connection members 40 and 50.
- 72 may be made of a Ni-Bi alloy.
- the structure of the alloy layers 71 and 72 can be determined by the plating film 31 b. For this reason, for example, a material that does not easily diffuse between the first and second interlayer connection members 40 and 50, a material that diffuses too much, and the like can be used as the base wires 21a and 31a, and the design freedom is improved be able to.
- the present embodiment is the same as the first embodiment except that the laminate 90 is integrated after the air gap is formed in the insulating base material 10 with respect to the first embodiment, and therefore the description is given here. I omit it.
- the through hole 13 corresponding to the void of the present invention is made to the insulating substrate 10 by a drill, a laser or the like.
- a plurality of cylindrical through holes 13 concentrically spaced apart at equal intervals in the circumferential direction are formed around each of the first and second via holes 11 and 12 as centers.
- the through-hole 13 may be made into the taper shape to which a diameter becomes small toward the back surface 10b from the surface 10a, It may be in the form of a letter.
- FIG. 5H the process of FIG. 5H is performed to form the first and second interlayer connection members 40 and 50.
- a laminate 90 is configured.
- FIG. 10 (b) pressure is applied from the front surface 10 a and the back surface 10 b of the insulating base material 10.
- the thermoplastic resin constituting the insulating substrate 10 flows, and the flowing thermoplastic resin pressurizes the first and second conductive pastes 41 and 51 (powder of alloy) and flows into the through holes 13.
- FIG. 10A a laminate 90 is configured.
- FIG. 10 (b) pressure is applied from the front surface 10 a and the back surface 10 b of the insulating base material 10.
- the thermoplastic resin constituting the insulating substrate 10 flows, and the flowing thermoplastic resin pressurizes the first and second conductive pastes 41 and 51 (powder of alloy) and flows into the through holes 13.
- FIG. 10A a laminate 90 is configured.
- FIG. 10 (b) pressure is applied from the front surface 10 a and the back surface 10
- the pressure applied to this portion (around the first and second via holes 11 and 12) for the thermoplastic resin to flow (flow) into the through hole 13 is The pressure becomes smaller and the pressure that should originally be applied to this portion is applied to the first and second conductive pastes 41 and 51. That is, the pressing force applied from the press plate to the first and second conductive pastes 41 and 51 can be increased.
- the first and second interlayer connection members 40 and 50 are configured, and the first and second interlayer connection members 40 and 50, the surface pattern 21 and the back surface pattern 31 are formed.
- the alloy layers 71 and 72 are formed between them.
- the through holes 13 are formed in the insulating base material 10, and the first and second interlayer connection members 40 and 50 are formed while flowing the thermoplastic resin in the through holes 13 . Therefore, the pressing force applied to the first and second conductive pastes 41 and 51 can be increased, and the solid phase sintering of the first and second conductive pastes 41 and 51 can be suppressed. Further, since the pressure applied to the first and second conductive pastes 41 and 51 can be increased, the alloy layer 71 can be formed between the first and second interlayer connection members 40 and 50 and the surface pattern 21 and the back surface pattern 31. , 72 can be formed easily.
- the through holes 13 are formed concentrically at equal intervals in the circumferential direction, with the first and second via holes 11 and 12 as centers. Therefore, when the first and second interlayer connection members 40 and 50 are formed, the thermoplastic resin around the first and second via holes 11 and 12 easily flows isotropically into the through hole 13. The displacement of the second via holes 11 and 12 in the planar direction of the insulating base 10 can be suppressed.
- This embodiment forms a gap between the laminate 90 and the press plate with respect to the third embodiment, and is otherwise the same as the third embodiment, so the description will be omitted here. .
- the through hole 13 is not formed in the insulating base material 10. Then, the laminate 90 is pressed using the pair of press plates 100 in which the depressions 100 a are formed in portions different from the portions facing the front surface pattern 21 and the rear surface pattern 31.
- thermoplastic resin constituting the surface protection member 20 and the back surface protection member 30 flows in each of the depressions 100 a of the pair of press plates 100, and this thermoplastic resin
- the thermoplastic resin of the insulating base material 10 flows in the flowed portion. For this reason, the pressure applied from the press plate 100 to the first and second conductive pastes 41 and 51 is increased.
- thermoplastic resin constituting the insulating base material 10 flows, so The pressure applied to the two conductive pastes 41 and 51 can be increased. Therefore, the same effect as that of the third embodiment can be obtained.
- the convex portion is formed of the thermoplastic resin flowing into the recessed portion 100a. Therefore, after the laminated body 90 is integrated, the convex portion may be removed by cutting or the like, or a sheet or the like having thermal conductivity may be disposed to cover the convex portion, and the upper and lower sides of the thermoelectric conversion device 1 may be Both sides may be planarized.
- the pair of press plates 100 in which the depressions 100a are formed in portions different from the portions facing the surface pattern 21 and the back surface pattern 31 has been described.
- a pair of press plates 100 may be used in which the depressions 100 a are formed in portions including the portions facing the front surface pattern 21 and the rear surface pattern 31. Even when such a press plate 100 is used, the respective thermoplastic resins constituting the insulating base material 10, the surface protection member 20, and the back surface protection member 30 flow, so that the same effect can be obtained.
- the present embodiment is the same as the first embodiment except that the manufacturing method is changed with respect to the first embodiment, and therefore the description is omitted here.
- first and second via holes 11 and 12 are formed in the insulating base 10, as shown in FIG. Then, as shown in FIG. 12B, the first and second interlayer connection members 40 and 50 are embedded in the first and second via holes 11 and 12, respectively.
- the first and second interlayer connection members 40 and 50 are appropriately cut after solid-phase sintering of a Bi-Sb-Te alloy powder (metal particles) or a Bi-Te alloy powder (metal particles). It was constructed by
- the back surface protection member 30 in which the back surface pattern 31 was formed is prepared.
- the back surface protection member 30, the insulating base material 10, and the surface protection member 20 are sequentially laminated to constitute a laminate 90.
- the laminate 90 is disposed between a pair of press plates (not shown), and pressure is applied while heating in vacuum from both upper and lower sides in the laminating direction to integrate the laminate 90. Do.
- the process since the first and second interlayer connection members 40 and 50 are disposed on the insulating base material 10, the process may be performed under the conditions in which the alloy layers 71 and 72 are formed, as shown in FIG. It can be done at lower pressure compared to the process of
- the pressing force applied between the first and second interlayer connection members 40 and 50 and the surface pattern 21 and the back surface pattern 31 from the press plate is increased, and the first embodiment is applied. From the embodiment, the pressure applied from the press plate to the laminate 90 can be reduced to form the alloy layers 71 and 72.
- thermoelectric conversion device 1 is manufactured.
- the first and second interlayer connection members 40 and 50 are embedded in the first and second via holes 11 and 12 in the process of FIG. 12B, as in the first embodiment, The step of evaporating the organic solvent (period of T0 to T1 in FIG. 6) is not necessary.
- the alloy layers 71 and 72 are formed. The same effect as that of the first embodiment can be obtained.
- first and second interlayer connection members 40 and 50 are embedded in the via holes 11 and 12 formed in the insulating base material 10, in the integration step, the first and second interlayer connection members 40 and 50 are provided.
- the component of the generated stress in the direction perpendicular to the laminating direction can be offset by the insulating substrate 10. Therefore, it is possible to suppress the first and second interlayer connection members 40 and 50 from being broken in the direction perpendicular to the stacking direction.
- the insulating base material 10 in the step of preparing the insulating base material 10 filled with the first and second conductive pastes 41 and 51, the insulating base material 10 has the first and second via holes 11, 12 may be formed simultaneously.
- a mask in which a region corresponding to the first via hole 11 is opened is disposed on the surface 10 a of the insulating base material 10 and only the first via hole 11 is filled with the first conductive paste 41.
- the conductive paste 51 may be filled.
- a mask having an area corresponding to the second via hole 12 may be disposed on the surface 10a of the insulating base material 10.
- the organic solvent constituting the second conductive paste 51 one in which the first conductive paste 41 is melted at the time of filling the second conductive paste 51 can be used, for example, the first conductive property Similar to the organic solvent of paste 41, paraffin can be used. In this case, of course, it is possible to use telepine as the organic solvent of the first and second conductive pastes 41 and 51.
- thermoelectric conversion device 1 may be configured as in the fifth embodiment by using the first and second interlayer connection members 40 and 50 disposed on the insulating base material 10 as described above.
- the second interlayer connection member 50 may be made of metal particles of Ag--Sn or the like. That is, the second interlayer connection member 50 may not be mainly used to exhibit the thermoelectric effect, but may be formed for conduction. In this case, the locations at which the first and second via holes 11 and 12 are formed are changed as appropriate, and the shapes of the surface pattern 21 and the back surface pattern 31 are changed as appropriate.
- the first interlayer connection members 40 may be connected in parallel via the second interlayer connection members 50, respectively.
- the heating temperature, the pressing force, and the treatment time when performing the process of FIG. 5 (h) or FIG. 12 (f) are one example, and the alloy layer is appropriately changed by changing these conditions. 71, 72 thickness can be changed. For this reason, it is preferable to change each condition suitably so that it may become the thickness of the alloy layers 71 and 72 appropriate according to a use.
- the above embodiments can be combined as appropriate.
- the second embodiment may be combined with the third to fifth embodiments to provide the plating film 21b on the surface pattern 21 and the plating film 31b on the rear surface pattern 31.
- you may form the through-hole 13 in the insulation base material 10.
- FIG. The fourth embodiment may be combined with the fifth embodiment, and the laminate 90 may be integrated using a pair of press plates 100 in which the depressions 100a are formed.
- other embodiments may be combined as appropriate with the combination of the embodiments.
- the air gap may not be the through hole 13.
- a frame-like groove may be formed on at least one of the front surface 10a and the back surface 10b of the insulating base 10 as the air gap, surrounding the first and second via holes 11 and 12.
- the insulating base material 10 one including a glass cloth having a cavity as a void in the inside may be used, or a porous one in which a plurality of holes as a void are formed in the inside may be used. .
- thermoelectric effect occurs when two different types of metals are connected, in each of the above embodiments, only the first via hole 11 is formed in the insulating base material 10 and the first interlayer connection to the first via hole 11 is made. Only the member 40 may be disposed. That is, the present invention can also be applied to a thermoelectric conversion device in which only one type of interlayer connection member is disposed on the insulating base material 10.
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Abstract
Description
本発明の第1実施形態について図面を参照しつつ説明する。図1~図3に示されるように、本実施形態の熱電変換装置1は、絶縁基材10、表面保護部材20、裏面保護部材30が一体化され、この一体化されたものの内部で異種金属である第1、第2層間接続部材40、50が交互に直列に接続されて構成されている。
本発明の第2実施形態について説明する。本実施形態は、第1実施形態に対して表面パターン21および裏面パターン31にメッキ膜を形成してものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明の第3実施形態について説明する。本実施形態は、第1実施形態に対して絶縁基材10に空隙を形成した後に積層体90を一体化するものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明の第4実施形態について説明する。本実施形態は、第3実施形態に対して、積層体90とプレス板との間に空隙を形成するものであり、その他に関しては第3実施形態と同様であるため、ここでは説明を省略する。
本発明の第5実施形態について説明する。本実施形態は、第1実施形態に対して製造方法を変更したものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
11 第1ビアホール
12 第2ビアホール
21 表面パターン
31 裏面パターン
40 第1層間接続部材(熱電変換素子)
50 第2層間接続部材(熱電変換素子)
71 合金層
72 合金層
Claims (20)
- 厚さ方向に貫通する複数のビアホール(11、12)が形成された絶縁基材(10)と、
前記ビアホールに配置され、複数の金属原子が所定の結晶構造を維持している合金で形成された熱電変換素子(40、50)と、
前記絶縁基材の表面(10a)に配置され、所定の前記熱電変換素子と電気的に接続される表面パターン(21)と、
前記絶縁基材の裏面(10b)に配置され、所定の前記熱電変換素子と電気的に接続される裏面パターン(31)と、を備え、
前記熱電変換素子と前記表面パターンとの界面には、前記熱電変換素子を構成する金属原子および前記表面パターンを構成する金属原子が拡散して構成された合金層(71)が形成され、
前記熱電変換素子と前記裏面パターンとの界面には、前記熱電変換素子を構成する金属原子および前記裏面パターンを構成する金属原子が拡散して構成された合金層(72)が形成され、
前記熱電変換素子と、前記表面パターンおよび前記裏面パターンとは、前記合金層を介して電気的及び機械的に接続されていることを特徴とする熱電変換装置。 - 前記熱電変換素子の一部は、Bi-Sb-Te系の合金を含んで構成されていることを特徴とする請求項1に記載の熱電変換装置。
- 前記熱電変換素子の一部は、Bi-Te系の合金を含んで構成されていることを特徴とする請求項1または2に記載の熱電変換装置。
- 前記表面パターンおよび前記裏面パターンは、Cuを含んで構成されていることを特徴とする請求項1ないし3のいずれか1つに記載の熱電変換装置。
- 前記合金層は、Cu-Te系の合金またはCu-Bi系の合金を含んで構成されていることを特徴とする請求項1ないし4のいずれか1つに記載の熱電変換装置。
- 前記表面パターンおよび裏面パターンは、下地配線(21a、31a)と、前記下地配線上に形成されたメッキ膜(21b、31b)にて形成されており、
前記合金層は、前記熱電変換素子を構成する金属原子および前記メッキ膜を構成する金属原子が拡散して形成されていることを特徴とする請求項1ないし5のいずれか1つに記載の熱電変換装置。 - 前記メッキ膜は、Niで構成されていることを特徴とする請求項6に記載の熱電変換装置。
- 前記合金層は、Ni-Te系の合金またはNi-Bi系の合金を含んで構成されていることを特徴とする請求項6または7に記載の熱電変換装置。
- 熱可塑性樹脂を含んで構成されており、厚さ方向に貫通する複数のビアホール(11、12)が形成され、前記ビアホールに複数の金属原子が所定の結晶構造を維持している合金の粉末に有機溶剤を加えてペースト化した導電性ペースト(41、51)が充填されている絶縁基材(10)を用意する工程と、
前記絶縁基材の表面(10a)に所定の前記導電性ペーストと接触する表面パターン(21)を有する表面保護部材(20)を配置すると共に、前記絶縁基材の裏面(10b)に所定の前記導電性ペーストと接触する裏面パターン(31)を有する裏面保護部材(30)を配置して積層体(90)を形成する工程と、
前記積層体を加熱しながら積層方向から加圧し、
前記導電性ペーストから熱電変換素子(40、50)を形成しつつ、前記熱電変換素子を構成する金属原子および前記表面パターンを構成する金属原子が拡散して構成される合金層(71)を形成すると共に前記熱電変換素子を構成する金属原子および前記裏面パターンを構成する金属原子が拡散して構成される合金層(72)を形成し、
前記熱電変換素子と、前記表面パターンおよび前記裏面パターンとを前記合金層を介して電気的及び機械的に接続する一体化工程と、を行うことを特徴とする熱電変換装置の製造方法。 - 前記一体化工程では、前記積層体を加熱して前記導電性ペーストに含まれる前記有機溶剤を蒸発させる工程と、前記絶縁基材を構成する熱可塑性樹脂の軟化点以上の温度に前記積層体を加熱しながら前記積層方向から加圧し、前記熱電変換素子と、前記表面パターンおよび前記裏面パターンとを前記合金層を介して電気的、機械的に接続する工程と、前記積層方向からの加圧を保持しつつ、前記積層体を冷却して前記積層体を一体化する工程と、を行うことを特徴とする請求項9に記載の熱電変換装置の製造方法。
- 前記絶縁基材を用意する工程では、前記複数のビアホールの一部に、Bi-Sb-Te系の合金を含む金属の粉末がペースト化された前記導電性ペーストが充填されたものを用意することを特徴とする請求項9または10に記載の熱電変換装置の製造方法。
- 前記絶縁基材を用意する工程では、前記複数のビアホールの一部に、Bi-Te系の合金を含む金属の粉末がペースト化された前記導電性ペーストが充填されたものを用意することを特徴とする請求項9ないし11のいずれか1つに記載の熱電変換装置の製造方法。
- 熱可塑性樹脂を含んで構成されており、厚さ方向に貫通する複数のビアホール(11、12)が形成され、前記ビアホールに熱電変換素子(40、50)が埋め込まれた絶縁基材(10)を用意する工程と、
前記絶縁基材の表面(10a)に所定の前記熱電変換素子と接触する表面パターン(21)を有する表面保護部材(20)を配置すると共に、前記絶縁基材の裏面(10b)に所定の前記熱電変換素子と接触する裏面パターン(31)を有する裏面保護部材(30)を配置して積層体(90)を形成する工程と、
前記積層体を加熱しながら積層方向から加圧し、前記熱電変換素子を構成する金属原子および前記表面パターンを構成する金属原子が拡散して構成される合金層(71)を形成すると共に前記熱電変換素子を構成する金属原子および前記裏面パターンを構成する金属原子が拡散して構成される合金層(72)を形成し、前記熱電変換素子と、前記表面パターンおよび前記裏面パターンとを前記合金層を介して電気的、機械的に接続する一体化工程と、を行うことを特徴とする熱電変換装置の製造方法。 - 前記一体化工程では、前記絶縁基材を構成する熱可塑性樹脂の軟化点以上の温度に前記積層体を加熱しながら前記積層方向から加圧し、前記熱電変換素子と、前記表面パターンおよび前記裏面パターンとを前記合金層を介して電気的、機械的に接続する工程と、前記積層方向からの加圧を保持しつつ、前記積層体を冷却して前記積層体を一体化する工程と、を行うことを特徴とする請求項13に記載の熱電変換装置の製造方法。
- 前記絶縁基材を用意する工程では、前記熱電変換素子の一部として、Bi-Sb-Te系の合金を含む材料が埋め込まれた部材を用意することを特徴とする請求項13または14に記載の熱電変換装置の製造方法。
- 前記絶縁基材を用意する工程では、前記熱電変換素子の一部として、Bi-Te系の合金を含む材料が埋め込まれた部材を用意することを特徴とする請求項13ないし15のいずれか1つに記載の熱電変換装置の製造方法。
- 前記積層体を形成する工程では、前記表面パターンがCuで構成された前記表面保護部材を用いると共に、前記裏面パターンがCuで構成された前記裏面保護部材を用いることを特徴とする請求項9ないし16のいずれか1つに記載の熱電変換装置の製造方法。
- 前記一体化工程では、前記合金層としてCu-Te系の合金またはCu-Bi系の合金を含むものを形成することを特徴とする請求項9ないし17のいずれか1つに記載の熱電変換装置の製造方法。
- 前記積層体を形成する工程の前には、前記絶縁基材に空隙(13)が形成されており、
前記一体化工程では、前記熱可塑性樹脂を前記空隙に流動させつつ、前記熱電変換素子および前記合金層を形成することを特徴とする請求項9ないし18のいずれか1つに記載の熱電変換装置の製造方法。 - 前記積層体を形成する工程では、前記表面保護部材および前記裏面保護部材として熱可塑性樹脂を含むものを用い、
前記一体化工程では、前記絶縁基材の表面と対向する部分および前記絶縁基材の裏面と対向する部分の少なくとも一方に窪み部(100a)が形成された一対のプレス板(100)を用いて前記積層体を加圧し、前記表面保護部材および前記裏面保護部材を構成する熱可塑性樹脂の少なくとも一方を前記窪み部に流動させると共に前記絶縁基材を構成する熱可塑性樹脂を流動させつつ、前記熱電変換素子および前記合金層を形成することを特徴とする請求項9ないし19のいずれか1つに記載の熱電変換装置の製造方法。
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- 2014-03-05 TW TW103107426A patent/TWI535079B/zh not_active IP Right Cessation
- 2014-03-05 US US14/773,186 patent/US20160027984A1/en not_active Abandoned
- 2014-03-05 KR KR1020157023626A patent/KR101887975B1/ko active IP Right Grant
- 2014-03-05 CN CN201480011304.6A patent/CN105027307B/zh not_active Expired - Fee Related
- 2014-03-05 WO PCT/JP2014/055635 patent/WO2014136841A1/ja active Application Filing
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016051982A1 (ja) * | 2014-09-30 | 2016-04-07 | 株式会社デンソー | 熱電変換装置の製造方法 |
JP2016072430A (ja) * | 2014-09-30 | 2016-05-09 | 株式会社デンソー | 熱電変換装置 |
KR101914216B1 (ko) | 2014-09-30 | 2018-11-01 | 가부시키가이샤 덴소 | 열전 변환 장치의 제조 방법 |
Also Published As
Publication number | Publication date |
---|---|
JP2014197660A (ja) | 2014-10-16 |
US20160027984A1 (en) | 2016-01-28 |
TWI535079B (zh) | 2016-05-21 |
KR101887975B1 (ko) | 2018-08-14 |
KR20150113155A (ko) | 2015-10-07 |
JP6064861B2 (ja) | 2017-01-25 |
CN105027307B (zh) | 2017-12-26 |
TW201501377A (zh) | 2015-01-01 |
EP2966699A1 (en) | 2016-01-13 |
EP2966699A4 (en) | 2017-02-01 |
CN105027307A (zh) | 2015-11-04 |
EP2966699A8 (en) | 2016-03-23 |
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