WO1997045882A1 - Method for manufacturing thermoelectric module - Google Patents
Method for manufacturing thermoelectric module Download PDFInfo
- Publication number
- WO1997045882A1 WO1997045882A1 PCT/JP1997/001797 JP9701797W WO9745882A1 WO 1997045882 A1 WO1997045882 A1 WO 1997045882A1 JP 9701797 W JP9701797 W JP 9701797W WO 9745882 A1 WO9745882 A1 WO 9745882A1
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- WIPO (PCT)
- Prior art keywords
- thermoelectric
- substrate
- electrode
- conductor plate
- matrix
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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
- H10N19/00—Integrated devices, or assemblies of multiple devices, comprising at least one thermoelectric or thermomagnetic element covered by groups H10N10/00 - H10N15/00
- H10N19/101—Multiple thermocouples connected in a cascade arrangement
-
- 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
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S257/00—Active solid-state devices, e.g. transistors, solid-state diodes
- Y10S257/93—Thermoelectric, e.g. peltier effect cooling
Definitions
- thermoelectric module Description Manufacturing method of thermoelectric module
- the present invention provides a method for manufacturing a thermoelectric module in which a plurality of thermoelectric chips are electrically connected in series between a pair of electrically insulating substrates, and heat is generated on one substrate side by the Peltier effect of each thermoelectric chip and cooled on the other substrate side. It is about the method.
- JP-B-38-259925 discloses a conventional method for producing a thermoelectric module. According to this method, a plurality of P-type and N-type long thermoelectric bars are alternately arranged between a pair of conductor plates to join the conductor plates, and then along the direction perpendicular to the longitudinal direction of the thermoelectric bar. At the same time as cutting the thermoelectric bar by cutting the conductor plate, the thermoelectric bar is divided into multiple thermoelectric chips along the longitudinal direction, and the electrodes formed by cutting the conductor plate on the upper and lower surfaces of each thermoelectric chip are formed. Then, a plurality of thermoelectric chips are connected in series via electrodes.
- thermoelectric module in which thermoelectric chips are arranged in a matrix by this method, it is possible to make a plurality of offset cuts in the conductor plate from two opposing directions. It is difficult to accurately hold the bar and the conductor plate in place, and not only may the thermoelectric bar and conductor plate not be cut accurately, but also the resulting thermoelectric module has a zigzag shape. Each thermoelectric chip is connected only by one end electrode in the cutting direction with a cutting line in the shape of a cut. Before assembling this thermoelectric module as a product between a pair of substrates serving as a heat sink and a cooling plate, Maintaining the correct shape is often There was a problem that great care had to be taken.
- thermoelectric module that can easily and precisely manufacture a thermoelectric module.
- a plurality of thermoelectric chips are arranged and held in a matrix between a pair of first and second electrically insulating substrates, and each thermoelectric chip is electrically connected in series. This is to manufacture a thermoelectric module that heats the first substrate side and cools the second substrate side by the Peltier effect obtained by the chip, and a plurality of N-type and P-type long pieces cut out as the thermoelectric chip.
- a first conductor plate holding a plurality of first electrodes arranged in a predetermined matrix pattern and connected to the thermoelectric chip.
- a plurality of first electrodes are arranged along the column direction and along the row direction of the first conductor plate, and the mating electrodes arranged along the row direction are integrally connected by a horizontal bridge. ing.
- the method of the present invention comprises the steps of: bonding a first conductor plate to a first substrate and holding the first conductor plate on the first substrate; placing a long rod-shaped hot frost bar on the first conductor plate with a first electrode.
- the process of cutting the bars into a plurality of thermoelectric chips along the row direction and simultaneously cutting the horizontal bridge to individually assign thermoelectric chips on the first electrode, which was held on the thermoelectric chip by the second substrate It comprises a process of joining a plurality of second electrodes to form a circuit in which thermoelectric chips are connected in series with the first electrodes.
- a feature of the present invention is that, after the first electrode is held on the first substrate, the horizontal bridge that mechanically couples the first electrode is cut at the same time as the thermoelectric bar. electrode Since the upper thermoelectric bar is securely supported by the first substrate together with the first electrode, the cutting for forming the electric heating chip from the thermoelectric bar can be performed easily and accurately. Even after the heating chip
- thermoelectric modules Because with first electrode is supported by the first substrate, the assembly is easily performed with Re, Ru cormorants advantages force s fc also be stably maintained during the manufacturing process of the thermoelectric modules one Le follow.
- Ceramic and insulating synthetic resin are used for the first substrate and the second substrate.
- the first conductor plate is supported on the substrate.
- the first conductor plate is embedded in the substrate so as to expose the first electrode to the surface. You.
- the second electrode similarly to the first electrode, it is preferable that a plurality of the second conductor plates are arranged in a matrix, and the second electrode is supported by a ceramic substrate or a synthetic resin substrate.
- the thermoelectric bar is a long body having opposing upper and lower surfaces, opposing side surfaces, and opposing end surfaces at both ends in the longitudinal direction of the bar.
- the thermoelectric bar has a cleavage surface oriented along the opposing side surface, and a pair substantially orthogonal to the cleavage surface.
- the enhanced lower surface is joined to the first and second electrodes. Since the thermoelectric bar is cut at an angle substantially perpendicular to the cleavage plane, the thermoelectric bar can be cut accurately to a predetermined size without causing breakage along the cleavage plane.
- thermoelectric bars are integrated with an electrically insulating material before being arranged on the first electrode, the plurality of electrode bars on the first electrode can be positioned at one time, and the manufacturing efficiency can be improved. Rises.
- the horizontal bridge of the first conductor plate should be separated from the opposing surface of the first substrate, so that the first conductor plate can be separated from the first substrate. Avoid hitting and with a thermoelectric bar The ridge can be easily cut.
- the first substrate is made of alumina
- the first conductor plate is made of copper or a copper alloy
- the first electrode and the horizontal bridge are formed as an integral member with the first conductor plate.
- the plate is bonded to the first substrate by the DBC method.
- the first conductor plate can be easily bonded to the first substrate by the direct bonding copper (DBC) method.
- DBC direct bonding copper
- the first conductor plate has a single structure that surrounds the matrix of the first electrode and has a frame integrally connected to the matrix, and the frame is directly joined to the first substrate in addition to the first electrode.
- the first conductor plate, that is, the first electrode can be more securely coupled to the first substrate.
- This frame is designed to have a smaller thickness than the first electrode, and can suppress the occurrence of warping and distortion of the first conductor plate during coupling by the DBC method.
- the first conductor plate is bonded to both sides of the first ceramic substrate, and a matrix of thermoelectric chips is formed on the first electrode of each first conductor plate to form two series circuits of thermoelectric chips.
- the first conductor plates on both sides of the first substrate are provided with individual additional terminals located at one end of the first substrate and closely related to each other, and the two terminals are electrically connected by the additional terminals.
- the thermoelectric chips can be arranged three-dimensionally, increasing the amount of heat generated and cooled by the thermoelectric module.
- the conductor plate has an integral structure including a matrix of first electrodes and a bridge member that integrally connects the first electrode and the matrix.
- the above-mentioned bridge member includes a horizontal bridge and a matrix that connect the first electrodes arranged in the matrix direction.
- a vertical bridge that connects between adjacent ones of the first electrodes arranged in the column direction of the matrix, and a pair of first electrodes connected by a vertical bridge in one row of the matrix has a pair of the first electrodes in the adjacent row.
- the first electrode of the matrix is connected by the horizontal bridge and the vertical bridge, and the horizontal bridge and the vertical bridge are formed thinner than the first electrode.
- the uniform distribution of the thin horizontal and vertical bridges in the first conductor plate in this way makes it necessary to join the copper first conductor plate to the ceramic first substrate by the DBC method.
- the thermal stress generated from the difference in the coefficient of thermal expansion due to the high temperature treatment is absorbed by the thin horizontal and vertical bridges, and the first conductor plate is moved to the first substrate while maintaining the correct arrangement of the first electrodes. Can be combined.
- the lateral bridge is provided with a recess for absorbing thermal stress applied to the first conductor plate when the first conductor plate is joined to the first substrate, so that the more stable first conductor plate is provided. And the first substrate are obtained.
- the thin horizontal bridge is flush with the upper surface of the first electrode on which the thermoelectric bar is placed, and forms a recess of a lower opening between the first electrodes arranged in the row direction of the matrix.
- the vertical bridge forms a recess between the adjacent first electrode to absorb the thermal stress applied to the first electrode, and the above-mentioned recirculation shape effectively absorbs the upper thermal stress. .
- the thin vertical bar is flush with the lower surface of the first electrode bonded to the first substrate, forming a recess of an upper opening between adjacent first electrodes.
- a pair of first electrode matrices is formed on the first conductor plate, and a long slit formed on the first conductor plate is formed. It is desirable that a pair of matrices be separated in the row direction by a row.
- the first conductor plate when buried in the first substrate made of synthetic resin also has a matrix of first electrodes and a bridging for integrally connecting them. It is formed as a unitary structure having a jig member.
- the bridge member is composed of a horizontal bridge connecting the first electrodes arranged in the matrix row direction and a vertical bridge connecting one adjacent first electrode arranged in the matrix direction.
- a pair of first electrodes coupled by a vertical bridge in one row are alternately arranged with a pair of first electrodes in an adjacent row, and the first electrode of the matrix is coupled by a horizontal bridge and a vertical bridge;
- the synthetic resin forming the first substrate was filled in the space between the first electrodes and the space between the first electrode pairs arranged in the column direction of the matrix.
- the first conductor plate has a single structure that has an electrical terminal for connection to an external power supply in addition to the first electrode, horizontal bridge and vertical bridge, and it is necessary to add new members to the connection to the external power supply. Nare,
- thermoelectric chip constitutes a series circuit of the thermoelectric chip by leaving one of the joints and disconnecting the other.
- Each joint is integrally connected to the matrix of the first electrode at such a position that the number of the electrodes can be changed.
- thermoelectric module a portion for accommodating the temperature sensor of the thermoelectric module is formed in the frame of the first conductor plate, so that the sensor for controlling the temperature of the thermoelectric module can be easily incorporated.
- the first electrodes should be exposed on both surfaces of the first substrate at substantially equal exposure rates. Thus, warpage and deformation can be minimized, and a thermoelectric module of stable quality can be manufactured.
- a second conductor plate corresponding to the first conductor plate may be embedded in a second synthetic resin substrate. Further, when the first conductor plate is embedded in the first substrate made of synthetic resin, the corresponding second conductor plate may be supported on the second substrate made of ceramic.
- unnecessary portions are cut out and the first and second electrodes are cut off. As a result, the matrix of the first electrode and the second electrode can be maintained in a stable shape, and the reliability of the thermoelectric module improves.
- the second conductor plate having the same shape as the first conductor plate by using the second conductor plate having the same shape as the first conductor plate, the number of parts can be reduced and the productivity can be improved.
- thermoelectric bar with the first electrode is covered with a welding layer made of at least one material selected from the group consisting of Sn, Bi, Ag, and Au.
- a welding layer made of at least one material selected from the group consisting of Sn, Bi, Ag, and Au.
- thermoelectric bar with the first electrode is covered with a Cu welding layer
- bonding strength with the first substrate is similarly increased.
- a seal frame is held between the first substrate and the second substrate, and the series circuit of the thermoelectric chip and the associated first and second electrodes are sealed between the first substrate and the second substrate to form a thermoelectric chip.
- the seal frame is joined to a frame integral with the first conductor plate on the first substrate and a frame integral with the second conductor plate on the second substrate, so that good sealing can be performed.
- an appropriate plating layer is formed on both sides of the seal frame, it is securely connected to the first and second conductor frames by soldering or the like. Can be combined.
- this seal frame is integrally formed with one of the first and second substrates formed of an electrically insulating synthetic resin, the number of parts can be reduced.
- Each of the first and second conductor plates has an electric terminal for connection to an external power supply, and the electric terminal is arranged outside the seal frame to make an electric connection with the outside.
- thermoelectric bar By making the thermoelectric bar smaller than the width of the corresponding first electrode, the thermoelectric chip cut out of the thermoelectric bar can contact the first and second electrodes on the entire surface of the thermoelectric bar, and it is generated by the thermoelectric chip All the heat can be effectively conducted to the first electrode and the second electrode, so that effective heat generation and cooling can be performed, and the thermoelectric chip is prevented from accumulating thermal fatigue and being destroyed.
- FIG. 1 is a partially cutaway top view showing a thermoelectric module obtained by a method according to one embodiment of the present invention
- Figure 2 is a vertical cross-sectional view of the thermoelectric module
- FIG. 3 is a cross-sectional view of the thermoelectric module
- FIG. 4 is a plan view of the first conductor plate used in the thermoelectric module of the above;
- FIG. 5 is a perspective view of the first conductor plate of the same;
- Figure 6 is a bottom view of the first conductor plate of the above;
- FIG. 7 is a perspective view showing the lower surface side of the first conductor plate of the above.
- Fig. 8 is a sectional view taken along line A-A in Fig. 4;
- Fig. 9 is a sectional view taken along line BB in Fig. 4;
- Fig. 10 is a cross-sectional view taken along line C-C in Fig. 4;
- FIG. 11 is a sectional view taken along line D-D in Fig. 4;
- FIG. 12 is a perspective view showing a state where the first conductor plate is joined to a first substrate;
- FIG. 13 is a perspective view showing a state in which a thermoelectric bar is joined on the first conductor plate of the above;
- Figure 14 is a partial cross-sectional view of a jig used to mount the thermoelectric bar used in the thermoelectric module;
- FIG. 15 is a perspective view showing the case where the thermoelectric bar is held in advance by an insulator;
- FIG. 16 is a cross-sectional view showing the relationship between the electrodes and the thermoelectric bar in the thermoelectric module of the same;
- Fig. 17 is a perspective view showing the cleavage plane of the thermoelectric bar
- Figure 18 is an explanatory diagram showing the relationship between the cleavage plane of the thermoelectric chip and the first and second electrodes;
- FIG. 19 is a perspective view showing the cutting of the thermoelectric bar
- FIG. 20 is a cross-sectional view showing the same thermoelectric bar cut
- FIG. 21 is a perspective view showing a state after the thermoelectric bar is cut into thermoelectric chips
- FIG. 22 is a plan view showing a state after the thermoelectric bar is cut into thermoelectric chips
- FIG. 23 is a perspective view of a second conductor plate used in the above.
- FIG. 24 is a perspective view showing an attached state of the seal frame used in the above;
- FIG. 25 is a perspective view showing the same seal frame
- Fig. 26 is an enlarged sectional view showing the fixed part of the seal frame
- FIG. 27 is a perspective view showing another example of the same seal frame
- Fig. 28 is a perspective view of another conductor plate used in the thermoelectric module of the above;
- Fig. 29 is a perspective view showing the rear side of the conductor plate of the same;
- Figures 30A, 30B, 30C, 30D, 30E, and 30F are schematic diagrams showing various patterns of a series circuit formed by thermoelectric chips applied to the thermoelectric module;
- FIGS 31A, 31B, 31C, 31D, 31E and 31F are schematic diagrams showing other various patterns of the series circuit formed by the thermoelectric chip applied to the thermoelectric module;
- Figure 32 is a schematic diagram showing another pattern of the series circuit formed by the thermoelectric chip.
- Figure 33 is a cross-sectional view of the thermoelectric chip
- FIG. 34 is a perspective view showing another example of the manner of joining the thermoelectric bar to the first conductor plate of the above;
- FIG. 35 is a longitudinal sectional view showing another embodiment of the thermoelectric module of the above.
- FIG. 36 is a perspective view of the first conductive plate used in the above.
- 37 and 38 are a perspective view and a cross-sectional view showing another example of the seal frame used in the above.
- FIG. 39 shows another embodiment of the thermoelectric module of the above.) ⁇ A perspective view;
- FIG. 40 is a cross-sectional view of the thermoelectric module of the same;
- Fig. 41 is a partial perspective view showing the connection points of the circuits on the upper and lower surfaces of the first substrate in the thermoelectric module;
- FIG. 42 is a cross-sectional view showing a modification of the thermoelectric module. BEST MODE FOR CARRYING OUT THE INVENTION
- thermoelectric module M shown in FIGS. 1 to 4 has a matrix structure in which a plurality of P-type and N-type thermoelectric chips 1 are arranged between a pair of first and second substrates 10 and 20 in a matrix.
- the first electrode 31 and the second electrode 51 formed on the second substrate form a series circuit in which P-type and N-type thermoelectric chips 1 are alternately electrically connected.
- Both ends of the series circuit are electric terminals 44, 64 formed integrally with the first electrode 31 and the second electrode 51, respectively, and are electrically connected to an external power supply via the lead wire 2, and a current flows through each thermoelectric chip.
- thermoelectric chip generates heat on one surface joined to the first substrate 10 side and absorbs heat on the other surface joined to the second substrate 20, thereby heating the first substrate 10, and heating the second substrate 10. Cooling.
- a scoring frame 70 is provided between the first substrate 10 and the second substrate 20 to hermetically surround the thermoelectric chip 1 and the corresponding first and second electrodes.
- thermoelectric chips 1 are of the same type along the matrix row direction and P-type and N-type are alternately arranged along the column direction.
- the thermoelectric chips 1 in each row arranged in the row direction are formed by cutting one long thermoelectric bar 180 on the first substrate 10, and the thermoelectric bar is formed by B i — Te — S b A semiconductor containing Se as a main component.
- thermoelectric module In manufacturing the thermoelectric module, the first substrate 10 and the second substrate
- a first conductor plate 30 and a second conductor plate 50 each having a first electrode 31 and a second electrode 51 in addition to the thermoelectric heater 80 are used.
- the first electrode 31 is integrally formed on the first conductor plate 30 made of copper by etching to form two matrices as shown in FIGS.
- the rectangular frame 40 surrounding these matrices is also formed on the first conductor plate 30 by etching.
- the two matrices are separated from each other by a central slit 32 of the first conductor plate 30, and are joined together at both ends of the slit 32.
- the first electrodes 31 arranged in the row direction are integrally connected by a horizontal bridge 33 as shown in FIGS. 4 and 5, and a pair of adjacent electrodes are arranged in the column direction.
- the matching first electrodes 31 are integrally joined by a vertical bridge 38 on the back surface side of the first conductor plate 30, and the pair of first electrodes 31 are separated from each other. line up.
- a plurality of first electrodes 31 are arranged at a pitch twice as large as the pitch between the first electrodes 31 in the other intermediate rows, and are integrated by the horizontal bridge 33 and the extended bridge 34. Is joined to.
- the first electrode 31 at one end in the column direction is integrally connected to the first electrode 31 at one end of an adjacent row via an extension bridge 33, and one row is connected in series to the other row. You.
- the upper two matrices are connected by a pair of outer rows.
- the horizontal bridge 33 is formed to be thinner than half the thickness of the first electrode 31 and the upper surface thereof is flush with the first electrode 31 to form a recess 35 on the back surface side. are doing.
- a hole 36 is formed in the horizontal bridge 33, and as will be described later, the horizontal bridge 33 is cut at this portion, and the first electrode 31 is formed along the row direction.
- the extension bridge 34 in the outer row is formed to be thinner than half the thickness of the first electrode 31, and the back surface thereof is flush with the back surface of the first electrode 31.
- a recess 37 is formed on the upper surface side.
- the vertical bridge 38 is also formed into a thin wall having a thickness equal to or less than half the thickness of the electrode, and its lower surface is flush with the first electrode 31.
- a recess 39 is formed between them.
- the frame 40 is also formed to be as thin as about 0.3 mm or less, and the lower surface thereof is flush with the lower surface of the first electrode 31.
- the frame 40 and the matrix of the first electrode 31 are connected by a thin cut piece 41, and the cut piece 41 extends from the upper surface of the first electrode 31 to the frame 40, and will be described later. So that the frame 40 and the matrix of the first electrode 31 are cut at this point. Electrically and physically separated.
- an apron 42 parallel to the matrix row direction is formed integrally with the frame 40, and is connected to the matrix of the first electrode 31 by one lead piece 43.
- the electric terminal 44 is formed on the apron 42 and is electrically connected to the first electrode 31 via the lead piece 43.
- the electric terminals 44 may be connected to the first electrode 31 at one end of an appropriate row in the matrix by a plurality of lead pieces 4 3. In this case, an arbitrary lead piece 4 3 is left. By cutting off the others, the effective number of thermoelectric chips that constitute the series circuit can be adjusted, and the amount of heat generation and cooling can be adjusted.
- the apron 42 is provided with a plurality of cuts 45 at the same pitch as the first electrode, and serves as a guide when cutting the horizontal bridge 33 simultaneously with the thermoelectric bar 80 as described later. As shown in Fig. 4, the apron 42 is connected to the frame 40 at the central electrical terminal 44 and one end 46, and a temperature sensor for controlling the temperature of the thermoelectric module is cut at a portion cut between the terminals. (Not shown) is fitted.
- the second electrode 51 is similarly formed integrally with the frame 60 and the apron 62 by etching from the second conductor plate 50 made of copper, and the second electrode 51 is formed.
- a matrix is formed, the second conductor plate 50 has the same configuration and shape as the first conductor plate 30, and the same electric terminals 64 are formed on the apron 62.
- the conductor plate may be formed by a processing method other than etching or press processing. In any case, Ni plating for preventing oxidation and Sn, Au plating for improving solder wettability. Should be provided.
- the first substrate 10 and the second substrate 20 are ceramic substrates made of alumina, and are formed by a technique called DBC (Direct Bonding Copper) method.
- the first conductor plate 30 and the second conductor plate 50 are joined to the respective substrates. Since the temperature of the conductor plate becomes 100 ° C. or higher at the time of this joining, the hardness is reduced, the thermoelectric bar can be softly supported, and the stress applied to the thermoelectric chip can be expected to be reduced. Since bonding is performed at a high temperature, stress is applied to the conductor plate to prevent the substrate and the conductor plate from warping after bonding due to the difference in the coefficient of thermal expansion between the copper conductor plate and the ceramic substrate. A place for relaxation is formed.
- the location of this stress relaxation is the recess 35 formed in the above-mentioned horizontal bridge 38, the hole 36, and the recess 39 on the vertical bridge 38.
- the substrate and the conductor plate may be joined by a method other than the DBC method, for example, brazing.
- As the substrate an appropriate ceramic / synthetic resin such as beryl is used in addition to alumina.
- thermoelectric module M A method for manufacturing the thermoelectric module M will be described.
- the first conductor plate 30 and the second conductor plate 50 are joined to the first substrate 10 and the second substrate 20, respectively.
- the back surface of each electrode 31, the back surface of the vertical bridge 38, the back surface of the extension bridge 34, the back surface of the frame 40, and the back surface of the apron 42 are joined to the first substrate 10.
- the horizontal bridge 38 floats from the surface of the substrate 10 as shown in FIGS. The same bonding is performed on the second substrate 20.
- thermoelectric heaters 80 are alternately arranged and joined on the first electrode 30 of the first conductive plate 30.
- the joining is performed by soldering, and as a result, as shown in FIG. 17, a welding layer 81 is formed on the joining surface of the thermoelectric heater 80 by adhesion or vapor deposition.
- the welding layer one selected from Sn, Bi, Ag, Au, and Cu is used.
- thermoelectric bar 80 A lower guide 91 provided with slots 92 provided at the same pitch as the electrodes 31 and a second plate 94 provided with slots 93 at double pitch.
- the upper guide 93 is slid so that the long hole 94 matches the long hole 92, and the N-type thermoelectric bar 80 is housed in the long hole 92 in this state.
- the thermoelectric bars 80 can be arranged at an appropriate pitch on the first electrode 31, and the misalignment of the P-type and N-type thermoelectric bars 80 can be prevented.
- thermoelectric bar 80 alternately arranged at a predetermined interval is integrated with an insulating material to form a plate-like material, which is then used as the first electrode 31. You may make it join on top. Furthermore, as shown in FIG. 15, the thermoelectric bars 80 are integrated only at both ends with insulating materials 83, and after the thermoelectric bars are cut into thermoelectric chips, the insulating materials 83 May be removed.
- thermoelectric bar 80 has a width X of the first electrode.
- thermoelectric chip 3 Use the same or slightly smaller width as Y. This is to prevent the performance degradation by ensuring that the heat generated in the thermoelectric chip 1 can be released to the first substrate 10 side through the first electrode 31. If the width X of 1 is larger than the width of the junction electrode Y, thermal fatigue occurs in a portion of the thermoelectric chip 1 not in contact with the first electrode 30 and element destruction occurs. Note that the P-type and N-type thermoelectric bars 80 need not have the same width.
- the thermoelectric bar 80 has a cleavage plane 82.
- the thermoelectric bar 80 is formed by cutting from a bulk material, as shown in FIG. 17, the cutting is performed so that the cleavage plane 82 is oriented along the longitudinal direction of the thermoelectric bar 80.
- the thermoelectric bar 80 is divided into the thermoelectric chips 1 as described later, the cutting line does not coincide with the cleavage plane 82. This is because the thermoelectric bar 80 is a brittle material, and when cut in parallel to the cleavage plane 82, there is a very high possibility of chipping or cracking, leading to a reduction in yield.
- thermoelectric heater 80 is joined to the first electrode 31 and the second electrode 51 on the upper and lower surfaces substantially perpendicular to the cleavage plane, so that the thermoelectric module is energized to absorb heat on one side and dissipate heat on one side.
- the cleavage planes of the thermoelectric chips 1 cut out from the thermoelectric bars 80 are arranged along the direction of expansion and contraction caused by the difference in heat between the two surfaces when performing the heat treatment. During operation of the thermoelectric module, as shown in Fig. 18, expansion and contraction occur in the direction in which the P-type thermoelectric chips 1 and the N-type thermoelectric chips 1 are alternately arranged, but the cleavage planes 81 are aligned in this direction.
- the stress due to the above-mentioned expansion and contraction can be absorbed by the minute displacement in the cleavage plane 10, and as a result, the allowable range of the displacement due to the expansion and contraction increases, and the breakage of the thermoelectric chip 1 due to the stress can be prevented.
- thermoelectric bars 80 After joining the thermoelectric bars 80 to the first substrate 10, the thermoelectric bars 80 are cut off. This cutting is performed using a grindstone (dicing 'saw) 100, as shown in FIGS. Since each thermoelectric bar 80 is bonded on the first electrode 31 aligned in a straight line, all thermoelectric bars 80 are cut at a time and the thermoelectric chips 1 are individually separated on each electrode 31. Since it can be left in a state, cutting is easy. Further, a plurality of whetstones 100 can be simultaneously moved, so that the cutting time can be reduced. At this time, by cutting in a direction substantially perpendicular to the cleavage plane of the thermoelectric bar 80, the resulting thermoelectric chip 1 is prevented from being damaged.
- a grindstone dicing 'saw
- thermoelectric bar 80 At the same time as the thermoelectric bar 80 is cut, the horizontal bridge 38 connecting the first electrodes 31 and the first electrodes 31 at both ends in the row direction are connected to the frame 40 as shown in FIG.
- the cutting pieces 4 1 are cut off, and the thermoelectric chips 1 are individually formed on the first electrodes 31 arranged in the row direction. W / 4
- the first electrodes 31 are separated, and the matrix of the first electrodes 31 is separated from the frame 40 force. Since the horizontal bridge 33 and the cut-out piece 41 are floating from the first substrate 10, the cutting can be performed without bringing the grindstone into contact with the substrate. Further, since the frame 40 and the extended bridge 34 are thin and bonded to the first substrate 10, they can be prevented from being erroneously cut.
- FIG. 21 shows a state in which individual thermoelectric chips 1 are formed on the first electrodes 31 separated in the row direction in this way.
- the first conductor plate 10 is cut off at the portion indicated by the hatching in FIG. 22, and the thermoelectric bar 80 is not joined to the first conductor plate 30 at the portion corresponding to the extension bridge 34 on the outer row Therefore, the thermoelectric chips separated here are removed, and the thermoelectric chips 1 are arranged in the outer row at twice the pitch of the other rows.
- the cut piece 41 is also cut at the same time to separate the matrix of the first electrode 31 from the frame 40.
- the depth of the cut 45 provided in the above-mentioned opening 42 is substantially equal to the thickness of the horizontal bridge 38, and a grindstone 100 is formed in the cut 45 to cut the horizontal bridge 38. Cutting may be performed using a laser, a high-pressure water jet, or the like instead of the grindstone 100.
- the second conductor plate 50 is also joined to the second substrate 20 in the same manner as the first conductor plate 30. As shown in FIG. 23, the second electrode 51 is separated in the row direction by a horizontal bridge, and The second electrode 51 is separated from the frame 60.
- a rectangular seal frame 70 is placed between the first substrate 10 and the second substrate 20. And seal the matrix of thermoelectric chip 1 between them.
- the seal frame 70 has the first conductor plate 10 and the second conductor plate — Joined to frames 40, 60 of port 20.
- the seal frame 70 is formed by forming a metal film 72 of copper, nickel, tin or the like on the surface of a synthetic resin frame by plating, spraying, or the like, and is joined to the frames 40 and 60 by soldering 73.
- the penetration of moisture is prevented. Also, as shown in FIG.
- the seal frame 70 has a cross-sectional shape having a portion directly in contact with the first substrate and the second substrate inside the frames 40 and 60, so that the distance between the two substrates can be improved. The interval can be determined accurately. Since the soldered part is visible from the outside, its quality can be determined. Also, an adhesive 74 is used in combination to prevent moisture from entering from a crack where the metal film 72 is not provided or a fatigue of the solder 73. The seal frame 70 also bears a load applied to the substrates 10 and 20.
- the bonding between the seal frame 70 and the second substrate 20 is performed simultaneously with the bonding between the second electrode 51 on the second substrate 20 and the thermoelectric chip 1.
- the distance between the two substrates is determined by the seal frame 70, and the variation in the height of the thermoelectric chip 1 can be adjusted by the thickness of the solder joined to the second electrode 51.
- the load can be shared by the rigidity of the seal frame 70 and the rigidity of the thermoelectric chip 1, and the load applied to the thermoelectric chip 1 can be reduced.
- FIG. 27 in order to improve the rigidity of the seal frame 70, it is preferable to increase the thickness of the four corners and to provide a column 75 for receiving a load at the center.
- thermoelectric module configured as described above is composed of the first and second electrodes 31 and 51 and the vertical bridge 3 in which the entire thermoelectric chip 1 is bonded on the first and second substrates 10 and 20. 8 and the extension bridge 34 electrically connect in series to form a series circuit, and are connected to the power supply via the electric terminals 44 and 64.
- the thermoelectric chips 1 are thinned out at the top row and the bottom row because the first and second conductor plates are Thus, a common one can be used, and the P-type thermoelectric chips 1 or the N-type thermoelectric chips 1 are prevented from being continuously connected. At the center of the lowest row, two thermoelectric chips 1 of the same type are connected in series.
- thermoelectric chips 1 causes a slight decrease in efficiency, but such an arrangement allows the use of conductor plates of the same pattern with an odd number of rows of thermoelectric chips 1 and also reduces thermal stress. This is because it is possible to form slits 32 on the conductor plate to form two electrode matrices.
- thermoelectric chips 1 of the same type are arranged at both end rows. Although the rows at both ends remove part of the thermoelectric bar as described above, the same type makes it easier to recycle the removed one. If odd rows are used, P-type thermoelectric chips 1 should be placed in both rows. When the P-type thermoelectric chip 1 and the N-type thermoelectric chip 1 are compared, the P-type has better characteristics and lower cost.
- FIGS. 28 and 29 show the conductor plate 3 OA having the above structure integrally molded in an insulating resin by injection molding or the like, and the resin plate 1 OA supporting the conductor plate 30 A. .
- the upper and lower surfaces of the electrode 31A are exposed on the upper and lower surfaces of the substrate 1OA, and the cut piece 41A connecting the frame 40A and the electrode 31A is shown in FIG. 28.
- the substrate 1OA is cut by shaving four rounds on the upper surface.
- the surface of the conductor plate 30A into the substrate 1OA is oxidized once, and then the oxide film on the surface of the electrode 31A to which the thermoelectric bar is joined is removed. Perform Ni processing together with it.
- the above-mentioned seal frame can be integrally formed.
- the electrode 31 A ⁇ the vertical bridge 38 A and the extended bridge 34 A are radiating members ⁇ heat absorption It can be brought into direct contact with members, improving heat dissipation and heat absorption characteristics.
- the resin substrate 1 OA can particularly improve the heat radiation characteristics as compared with the ceramic substrate, it is necessary to use the ceramic substrate as the heat absorption side and use the resin substrate as the heat radiation side. Is desirable.
- a resin substrate can be used for both the heat dissipation side and the heat absorption side.
- the insulating resin substrate 1 OA is slightly higher than the surface of the electrode 31 A, when soldering to the thermoelectric battery and the thermoelectric chip, it will be Short circuits can be easily prevented.
- a part of the corresponding substrate 1OA is also cut at the same time.
- the area ratio of the resin portion to the metal portion exposed on the substrate is set to be substantially equal on both surfaces of the substrate, so that the warpage of the resin substrate is minimized.
- the resin an epoxy resin, particularly a resin to which SiO 2 is added is preferable.
- thermoelectric chips 1 are connected in series by the pattern shown in FIG. 3OA, but in addition to this, FIG. 30B to FIG. 3OF and FIG. 31A to FIG. 1F or the pattern shown in Figure 32 applies.
- FIG. 32 one line indicates connection between electrodes on one substrate side, and two lines indicate connection between electrodes on the other substrate side.
- thermoelectric bar 80 and the thermoelectric chip 1 are joined to the electrodes by soldering.However, the Mo layer 85 and the Ni layer 86 should be provided as a barrier layer on the thermoelectric chip 1 as shown in Fig. 33. Is preferred in terms of preventing diffusion. Also in Figure 31 In the figure, a layer made of a material selected from Sn, Bi, Ag, and Au, for example, a welding layer 81 which is a Sn + Bi layer is further provided on the Ni layer 18. This welding layer 81 is for preventing oxidation of the Ni layer 86 and improving solderability.
- the Ni layer 86 has a thickness of 1 ⁇ or more, and the Mo layer 85 has a smaller thickness.
- the Mo layer 85 is set to 0.2 nm
- the Ni layer 86 is set to 2 ⁇
- the deposited layer 81 of Sn + Bi is set to 2 ⁇ m.
- thermoelectric bars 80B are used for one row of electrodes, the stress applied to the thermoelectric bars due to the warpage generated on the substrate after the thermoelectric bars 80B are joined to the electrodes can be reduced. be able to.
- a reinforcing frame 78 may be provided on the outer periphery of the seal frame 70 as shown in FIG.
- a metal ring 47 for fixing the reinforcing frame 78 to the outside of the frame 40 is provided.
- the reinforcing frame 78 may be soldered to the ring 47 in the same manner as the seal frame 70, or may be fixed by an adhesive.
- FIG. 37 and FIG. 38 show another seal frame 70C used for the thermoelectric module.
- the seal frame 70C integrally includes a partition wall 76 for maintaining electrical insulation between the thermoelectric chips 1, and a joint between one surface of the thermoelectric chip 1 and the second electrode 51 of the second substrate 20 is shown in FIG. As shown in the drawing, the thermoelectric chips 1 can be separated from each other by the partition wall 76, so that a short circuit due to solder at the time of joining can be prevented.
- FIGS. 39 to 41 show embodiments in which the matrix of the thermoelectric chip is provided on both surfaces of the first substrate 10D.
- the first conductor plate 30D is joined to both surfaces of the first substrate 10D
- the thermoelectric chip 1 is formed on the first electrode 31D of each conductor plate 30D
- the second substrate 20D is formed. Formation The second electrode 51D thus formed is connected to the matrix of each thermoelectric chip 1 to form a thermoelectric module.
- each series circuit of the thermoelectric chip 1 formed on both sides of the first substrate 10D connects the electric terminals 44D formed on the first conductor plate 30D to each other through the notch 11 at the end of the substrate 10D. Can be connected directly.
- the second substrate 20D is made of an insulating synthetic resin, and is integrally provided with a sheet frame 70D. As shown in FIG. 40, the seal frames 70D abut on the outer periphery of the first substrate 10D to form a second frame. Two substrates are connected. Incidentally, as shown in FIG. 42, the first substrate 10D may be sandwiched between the seal frames 70D. In this case, the outer peripheral edge of the end of the seal frame 70D is joined to the frame 40D of the first substrate 10D.
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- Electric Clocks (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE69735589T DE69735589T2 (de) | 1996-05-28 | 1997-05-27 | Herstellungsverfahren für einen thermoelektrischen modul |
| EP97922202A EP0843366B1 (en) | 1996-05-28 | 1997-05-27 | Method for manufacturing thermoelectric module |
| US08/973,095 US5950067A (en) | 1996-05-27 | 1997-06-03 | Method of fabricating a thermoelectric module |
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15767796A JP3956405B2 (ja) | 1996-05-28 | 1996-05-28 | 熱電モジュールの製造方法 |
| JP8/133997 | 1996-05-28 | ||
| JP8133997A JPH09321352A (ja) | 1996-05-28 | 1996-05-28 | 熱電モジュール |
| JP8/157675 | 1996-05-28 | ||
| JP8157675A JPH09321354A (ja) | 1996-05-28 | 1996-05-28 | 金属パターンプレート |
| JP8/157677 | 1996-05-28 | ||
| JP8/133996 | 1996-05-28 | ||
| JP8133996A JPH09321351A (ja) | 1996-05-28 | 1996-05-28 | 電極プレート |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997045882A1 true WO1997045882A1 (en) | 1997-12-04 |
Family
ID=27471796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1997/001797 Ceased WO1997045882A1 (en) | 1996-05-27 | 1997-05-27 | Method for manufacturing thermoelectric module |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5950067A (ja) |
| EP (1) | EP0843366B1 (ja) |
| CN (1) | CN1104746C (ja) |
| DE (1) | DE69735589T2 (ja) |
| RU (1) | RU2154325C2 (ja) |
| WO (1) | WO1997045882A1 (ja) |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0827215A3 (en) * | 1996-08-27 | 2000-09-20 | Kubota Corporation | Thermoelectric modules and thermoelectric elements |
| US6400013B1 (en) | 1997-05-12 | 2002-06-04 | Matsushita Electric Works, Ltd. | Thermoelectric module with interarray bridges |
| RU2173493C2 (ru) * | 1997-12-05 | 2001-09-10 | Мацушита Электрик Уорк, Лтд. | Термоэлектрический модуль и способ его изготовления |
| US6391676B1 (en) | 1997-12-05 | 2002-05-21 | Matsushita Electric Works, Ltd. | Thermoelectric module and a method of fabricating the same |
| CN1109366C (zh) * | 1997-12-05 | 2003-05-21 | 松下电工株式会社 | 热电组件及其制作方法 |
| DE19856771C2 (de) * | 1997-12-05 | 2003-07-10 | Matsushita Electric Works Ltd | Thermoelektrisches Modul und Verfahren zur Herstellung desselben |
| US10367131B2 (en) | 2013-12-06 | 2019-07-30 | Sridhar Kasichainula | Extended area of sputter deposited n-type and p-type thermoelectric legs in a flexible thin-film based thermoelectric device |
| US10566515B2 (en) | 2013-12-06 | 2020-02-18 | Sridhar Kasichainula | Extended area of sputter deposited N-type and P-type thermoelectric legs in a flexible thin-film based thermoelectric device |
| US11024789B2 (en) | 2013-12-06 | 2021-06-01 | Sridhar Kasichainula | Flexible encapsulation of a flexible thin-film based thermoelectric device with sputter deposited layer of N-type and P-type thermoelectric legs |
| US10553773B2 (en) | 2013-12-06 | 2020-02-04 | Sridhar Kasichainula | Flexible encapsulation of a flexible thin-film based thermoelectric device with sputter deposited layer of N-type and P-type thermoelectric legs |
| US10141492B2 (en) | 2015-05-14 | 2018-11-27 | Nimbus Materials Inc. | Energy harvesting for wearable technology through a thin flexible thermoelectric device |
| US11283000B2 (en) | 2015-05-14 | 2022-03-22 | Nimbus Materials Inc. | Method of producing a flexible thermoelectric device to harvest energy for wearable applications |
| US11276810B2 (en) | 2015-05-14 | 2022-03-15 | Nimbus Materials Inc. | Method of producing a flexible thermoelectric device to harvest energy for wearable applications |
| WO2017036149A1 (zh) * | 2015-08-31 | 2017-03-09 | 华为技术有限公司 | 一种热电制冷模组、光器件及光模组 |
| JP2017228610A (ja) * | 2016-06-21 | 2017-12-28 | パナソニックIpマネジメント株式会社 | 熱電変換器 |
| JP2018019008A (ja) * | 2016-07-29 | 2018-02-01 | アイシン高丘株式会社 | 熱電モジュールおよびその製造方法 |
| US10559738B2 (en) | 2016-12-05 | 2020-02-11 | Sridhar Kasichainula | Pin coupling based thermoelectric device |
| US10516088B2 (en) | 2016-12-05 | 2019-12-24 | Sridhar Kasichainula | Pin coupling based thermoelectric device |
| US10290794B2 (en) | 2016-12-05 | 2019-05-14 | Sridhar Kasichainula | Pin coupling based thermoelectric device |
| JP2019033149A (ja) * | 2017-08-07 | 2019-02-28 | 株式会社三五 | 熱電発電モジュール及び当該熱電発電モジュールを含む熱電発電ユニット |
| JP2022013375A (ja) * | 2020-07-03 | 2022-01-18 | 株式会社Kelk | 熱電発電モジュール |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2154325C2 (ru) | 2000-08-10 |
| EP0843366A1 (en) | 1998-05-20 |
| DE69735589T2 (de) | 2007-01-04 |
| DE69735589D1 (de) | 2006-05-18 |
| CN1190492A (zh) | 1998-08-12 |
| EP0843366A4 (en) | 2000-09-27 |
| US5950067A (en) | 1999-09-07 |
| EP0843366B1 (en) | 2006-03-29 |
| CN1104746C (zh) | 2003-04-02 |
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