WO2022210573A1 - 温度センサ - Google Patents
温度センサ Download PDFInfo
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- WO2022210573A1 WO2022210573A1 PCT/JP2022/015105 JP2022015105W WO2022210573A1 WO 2022210573 A1 WO2022210573 A1 WO 2022210573A1 JP 2022015105 W JP2022015105 W JP 2022015105W WO 2022210573 A1 WO2022210573 A1 WO 2022210573A1
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- resistance
- temperature sensor
- electrode portion
- electrode
- sensor according
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract description 67
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims description 31
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 229910052697 platinum Inorganic materials 0.000 claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- 229910000531 Co alloy Inorganic materials 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 10
- 230000006866 deterioration Effects 0.000 abstract description 5
- 238000007747 plating Methods 0.000 description 17
- 230000001681 protective effect Effects 0.000 description 9
- 238000004544 sputter deposition Methods 0.000 description 7
- 229910000570 Cupronickel Inorganic materials 0.000 description 6
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011651 chromium Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910003336 CuNi Inorganic materials 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
- G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
Definitions
- the present disclosure relates generally to temperature sensors, and more particularly to temperature sensors comprising a first resistance section and a second resistance section.
- the temperature detection device described in Patent Document 1 detects temperature based on the difference in resistance between the first resistor and the second resistor.
- the temperature detection accuracy may deteriorate.
- An object of the present disclosure is to provide a temperature sensor capable of suppressing deterioration in temperature detection accuracy.
- a temperature sensor includes an alumina substrate, a planarizing film, a first resistance section, and at least one second resistance section.
- the planarizing film contains alumina as a main component and is formed on the alumina substrate.
- the first resistor section is formed on the planarizing film.
- the second resistance section is formed on the planarization film and forms a bridge circuit together with the first resistance section.
- FIG. 1 is an external perspective view of a temperature sensor according to an embodiment.
- FIG. 2 is a plan view of the same temperature sensor.
- FIG. 3 is an enlarged view of the A1 part in FIG. 2 regarding the same temperature sensor.
- FIG. 4 is a cross-sectional view taken along the line X1-X1 of FIG. 1 regarding the same temperature sensor.
- FIG. 5 is a cross-sectional view taken along line X2-X2 of FIG. 1, relating to the same temperature sensor.
- FIG. 6 is a cross-sectional view taken along the line Y1-Y1 of FIG. 1 regarding the same temperature sensor.
- FIG. 7 is a schematic circuit diagram of the same temperature sensor.
- FIG. 8 is another plan view of the temperature sensor of the same.
- FIG. 1 to 6 and 8 referred to in the following embodiments etc. are all schematic diagrams, and the ratio of the size and thickness of each component in the diagram does not necessarily reflect the actual dimensional ratio. Not necessarily.
- a temperature sensor 1 is an electronic component for measuring temperature.
- the temperature sensor 1 is, for example, a surface-mounted chip component mounted on the surface (mounting surface) of an external substrate (not shown) via a plurality (for example, four) of electrode portions 16, which will be described later.
- the external board is, for example, a printed wiring board.
- the temperature sensor 1 as shown in FIG. 2 resistors 141 , 142 , 143 are provided.
- the planarizing film 12 is mainly composed of alumina and is formed on the support substrate 11 .
- the first resistor section 131 is formed on the planarization film 12 .
- the second resistance sections 141, 142, and 143 are formed on the planarizing film 12 and form a bridge circuit together with the first resistance section 131. As shown in FIG.
- the first resistance section 131 and the second resistance sections 141, 142, and 143 are formed on the planarization film 12 formed on the support substrate 11, as described above. Therefore, compared to the case where the first resistor portion 131 and the second resistor portions 141, 142, and 143 are formed directly on the support substrate 11 without the planarization film 12 interposed therebetween, the first resistor portion 131 and the second resistor portion 141, 142, 143 can be flattened. This makes it possible to suppress deterioration in temperature detection accuracy. Further, in the temperature sensor 1 according to the embodiment, as described above, the main component of the planarizing film 12 is alumina. Therefore, it is possible to improve the adhesion between the supporting substrate 11 made of an alumina substrate and the planarizing film 12 .
- the term "main component of the planarizing film” refers to the component that accounts for the largest proportion in the planarizing film among the components that constitute the planarizing film.
- the main component of the planarizing film 12 is alumina, and the proportion of alumina in the planarizing film 12 is the largest.
- FIG. 1 Details Details of the temperature sensor 1 according to the embodiment will be described below with reference to FIGS. 1 to 7.
- FIG. 1
- the temperature sensor 1 is formed in a long rectangular parallelepiped shape along the first direction D1.
- the longitudinal direction of the temperature sensor 1 is the first direction D1
- the width direction (transverse direction) of the temperature sensor 1 is the second direction D2
- the thickness direction of the temperature sensor 1 is the third direction D3.
- these directions are not intended to limit the directions in which the temperature sensor 1 is used.
- the arrows indicating "D1", “D2", and “D3" in the drawings are only shown for explanation, and none of them are substantial.
- the first direction D1, the second direction D2, and the third direction D3 are orthogonal to each other.
- the temperature sensor 1 includes a support substrate 11, a planarizing film 12, a first resistance layer 13, and a second resistance layer 14, as shown in FIGS. Further, the temperature sensor 1 includes a protective film 15, a plurality of (eg, four) electrode portions 16, a plurality of (four in the illustrated example) first plating layers 17, and a plurality of (four in the illustrated example) and a second plating layer 18 .
- the support substrate 11 is, for example, a ceramic substrate.
- the material of the ceramic substrate is, for example, an alumina sintered body having an alumina content of 96% or more. That is, the support substrate 11 is an alumina substrate made of an alumina sintered body.
- the support substrate 11 is formed in a rectangular shape elongated in the first direction D ⁇ b>1 that is the longitudinal direction of the temperature sensor 1 when viewed from the third direction D ⁇ b>3 that is the thickness direction of the temperature sensor 1 .
- the support substrate 11 has a first main surface 111, a second main surface 112, and an outer peripheral surface 113, as shown in FIGS.
- Each of the first main surface 111 and the second main surface 112 is a plane along both the first direction D1 and the second direction D2, which is the width direction (transverse direction) of the temperature sensor 1 .
- each of the first main surface 111 and the second main surface 112 is a plane intersecting (perpendicular to) the third direction D3.
- the first main surface 111 and the second main surface 112 face each other in the third direction D3.
- the outer peripheral surface 113 includes four side surfaces connecting the first major surface 111 and the second major surface 112 . Each of the four side surfaces is a plane along the third direction D3.
- the planarizing film 12 is formed on the first main surface 111 of the support substrate 11, as shown in FIGS.
- the planarizing film 12 is mainly composed of alumina (Al 2 O 3 ), for example. That is, alumina accounts for the largest proportion of the components constituting the planarizing film 12, and is, for example, 50% by mass or more.
- the proportion of alumina in the planarizing film 12 is preferably 80% by mass or more, more preferably 90% by mass or more.
- the planarizing film 12 contains filler.
- the filler is at least selected from the group consisting of, for example, zinc oxide (ZnO), magnesium oxide (MgO), beryllium oxide (BeO), aluminum nitride (AlN), boron nitride (BN), silicon nitride (SiNx) and diamond. Contains 1 material. As a result, the thermal conductivity and linear expansion coefficient of the planarizing film 12 can be brought close to the thermal expansion coefficient and linear expansion coefficient of the support substrate (alumina substrate) 11 .
- the main component of the planarizing film 12 is alumina. Therefore, when the planarization film 12 is formed on the support substrate 11 made of an alumina substrate, even if a thermal load is applied, the difference in thermal expansion coefficient between the support substrate 11 and the planarization film 12 is unlikely to occur. In addition, since the material of the support substrate 11 and the material of the planarization film 12 are similar, the planarization film 12 has excellent insulating properties and thermal conductivity like the support substrate 11 .
- the thickness of the planarizing film 12 is preferably equal to or greater than the height of the irregularities. Specifically, it is preferable that the film thickness of the planarizing film 12 is, for example, 1.0 ⁇ m or more. This makes it possible to form the first resistance layer 13 and the second resistance layer 14 on the surface (upper surface) of the flattening film 12 in which unevenness is suppressed.
- the first resistance layer 13 is formed on the planarizing film 12, as shown in FIGS.
- the material of the first resistance layer 13 includes platinum (Pt), for example.
- the first resistance layer 13 is, for example, a sputtered film formed by sputtering.
- the first resistance layer 13 includes a first resistance section 131 as a resistance temperature detector. That is, the first resistance portion 131 is formed on the planarization film 12, and the material of the first resistance portion 131 is platinum. As shown in FIGS. 2 and 3, the first resistance portion 131 is formed in a meandering shape that meanders along the first direction D1 in plan view from the third direction D3. In other words, the first resistance portion 131 is formed in a meandering river-like shape along the first direction D1 in plan view from the third direction D3.
- the second resistance layer 14 is formed on the planarizing film 12, as shown in FIGS.
- the material of the second resistance layer 14 is, for example, a NiCrAlSi alloy.
- the weight ratio of nickel (Ni) to chromium (Cr) is 44/55 or more and 55/44 or less.
- the ratio of aluminum (Al) to the total weight is 10% by weight or more and 18% by weight or less.
- the ratio of silicon (Si) to the total weight is 2% by weight or more and 6% by weight or less.
- the second resistance layer 14 is, for example, a sputtered film formed by sputtering.
- the second resistance layer 14 includes a plurality of (three in the illustrated example) second resistance parts 141, 142, and 143, as shown in FIGS. That is, the second resistance sections 141, 142, 143 are formed on the planarizing film 12, and the material of the second resistance sections 141, 142, 143 contains a NiCrAlSi alloy.
- Each of the plurality of second resistance portions 141, 142, and 143 is formed in a rectangular shape elongated in one direction in a plan view from the third direction D3. More specifically, the second resistor portion 141 among the plurality of second resistor portions 141, 142, and 143 is formed in a rectangular shape elongated in the first direction D1.
- Each of the two second resistance portions 142 and 143 among the plurality of second resistance portions 141, 142 and 143 is formed in a rectangular shape elongated in the second direction D2.
- Two of the plurality of second resistance portions 141, 142, and 143 are arranged at both ends of the support substrate 11 in the first direction D1 in a plan view from the third direction D3. . That is, the two second resistance portions 142 and 143 are arranged along the first direction D1.
- the remaining second resistance portions 141 among the plurality of second resistance portions 141, 142, and 143 are one end portion (lower end portion in FIG. 2) of the support substrate 11 in the second direction D2 in plan view from the third direction D3. are placed in
- the above-described first resistor portion 131 is arranged at the other end portion (upper end portion in FIG. 2) of the support substrate 11 in the second direction D2. That is, the first resistance section 131 and the second resistance section 141 are arranged along the second direction D2.
- the material of the first resistance portion 131 contains platinum as described above.
- the material of the second resistor portions 141, 142, 143 includes NiCrAlSi alloy as described above. Therefore, in the temperature sensor 1 according to the embodiment, the temperature coefficient of resistance of the first resistor portion 131 is larger than the temperature coefficient of resistance of the second resistor portions 141 , 142 , 143 . Thereby, it is possible to detect a temperature change in the first resistance section 131 .
- the protective film 15 is a film for protecting the first resistance layer 13 and the second resistance layer 14 .
- the protective film 15 is formed to cover the first resistance layer 13 and the second resistance layer 14, as shown in FIGS.
- the material of the protective film 15 is, for example, silicon dioxide (SiO 2 ).
- SiO 2 silicon dioxide
- the connecting portion between the first resistance portion 131 and the electrode portion 16 described below in the first resistance layer 13 is not covered with the protective film 15 .
- the connecting portions of the second resistance layer 14 between each of the plurality of second resistance portions 141 , 142 , 143 and the electrode portion 16 are not covered with the protective film 15 .
- Each of the plurality of electrode portions 16 is formed at the four corners of the support substrate 11, as shown in FIG.
- the material of the plurality of electrode portions 16 is, for example, a copper-nickel (CuNi) alloy.
- Each of the multiple electrode portions 16 includes an upper surface electrode 161 , an end surface electrode 162 and a lower surface electrode 163 .
- the upper surface electrode 161 is formed on the first main surface 111 of the support substrate 11 and is connected to the first resistance section 131 in the first resistance layer 13 or the second resistance section 141 in the second resistance layer 14 . , 142 and 143 are connected.
- the edge electrode 162 is formed along the longitudinal direction (first direction D1) of the support substrate 11 so as to cover the longitudinal outer peripheral surface 113 of the support substrate 11 .
- the lower electrode 163 is formed on the second main surface 112 of the support substrate 11 .
- Each of the plurality of electrode portions 16 is formed in a U shape in plan view from the first direction D1.
- Each of the plurality of electrode portions 16 is, for example, a sputtered film formed by sputtering.
- the plurality of electrode portions 16 include a first electrode portion 16A, a second electrode portion 16B, a third electrode portion 16C, and a fourth electrode portion 16D.
- the first electrode portion 16A is, for example, a power terminal.
- the second electrode portion 16B is, for example, a ground terminal.
- the third electrode portion 16C is, for example, a first output terminal.
- the fourth electrode portion 16D is, for example, a second output terminal. That is, in the temperature sensor 1 according to the embodiment, DC power is supplied from a power supply (not shown) so that the first electrode portion 16A is on the positive (plus) side and the second electrode portion 16B is on the negative (minus) side. supplied.
- Each of the plurality of first plating layers 17 is, for example, an electrolytic copper plating layer.
- Each of the plurality of first plating layers 17 is formed so as to cover the corresponding electrode portion 16 among the plurality of electrode portions 16 . That is, each of the plurality of first plated layers 17 covers the upper surface electrode 161 , the end surface electrode 162 and the lower surface electrode 163 of the corresponding electrode portion 16 .
- Each of the plurality of first plating layers 17 is formed in a U shape when viewed from above in the first direction D1.
- Each of the plurality of second plating layers 18 is, for example, an electrolytic tin plating layer. Each of the plurality of second plating layers 18 is formed to cover the corresponding first plating layer 17 among the plurality of first plating layers 17 . Each of the plurality of second plating layers 18 is formed in a U shape when viewed from above in the first direction D1.
- the temperature sensor 1 includes a first resistance section 131 and a plurality of (three in the illustrated example) second resistance sections 141, 142, and 143.
- the temperature sensor 1 also includes a first electrode portion 16A, a second electrode portion 16B, a third electrode portion 16C, and a fourth electrode portion 16D.
- the first electrode portion 16A is the power terminal
- the second electrode portion 16B is the ground terminal
- the third electrode portion 16C is the first output terminal
- the fourth electrode portion 16D is the second output terminal. is.
- the first end of the first resistance section 131 is connected to the first end of the second resistance section 143 at a point P1, as shown in FIG.
- a second end of the first resistor portion 131 is connected to a second end of the second resistor portion 142 at a point P3.
- a second end of the second resistor portion 143 is connected to a second end of the second resistor portion 141 at a point P4.
- a first end of the second resistor portion 141 is connected to the first end of the second resistor portion 141 at a point P2. That is, the temperature sensor 1 according to the embodiment includes three second resistance portions 141, 142, and 143 as second resistance portions.
- the first resistance section 131 and the three second resistance sections 141, 142, 143 form a full bridge circuit. This makes it possible to amplify the detected voltage compared to the case where a half-bridge circuit is configured with the first resistance section and the second resistance section.
- the first electrode portion 16A is connected to the first resistance portion 131 and the second resistance portion 143 via the first connection portion 132.
- the first connection portion 132 is a connection portion between the first resistance portion 131 and the second resistance portion 143 of the first resistance layer 13 and the first electrode portion 16A.
- the second electrode portion 16B is connected to the two second resistance portions 141 and 142 via the second connection portion 133 .
- the second connection portion 133 is a connection portion between the two second resistance portions 141 and 142 of the second resistance layer 14 and the second electrode portion 16B.
- the third electrode portion 16 ⁇ /b>C is connected to the first resistance portion 131 and the second resistance portion 142 via the third connection portion 134 .
- the third connection portion 134 is a connection portion between the first resistance portion 131 and the second resistance portion 142 of the first resistance layer 13 and the third electrode portion 16C.
- the fourth electrode portion 16D is connected to the two second resistance portions 141 and 143 via the fourth connection portion 135 .
- the fourth connection portion 135 is a connection portion between the two second resistance portions 141 and 143 of the second resistance layer 14 and the fourth electrode portion 16D.
- the first electrode portion 16A and the second electrode portion 16B are arranged so that the first electrode portion 16A is on the positive (plus) side and the second electrode portion 16B is on the negative (minus) side.
- a power supply (not shown) is connected between and. Then, when the DC power from the power supply is supplied between the first electrode portion 16A and the second electrode portion 16B, the detected voltage (output signal) corresponding to the detected temperature is generated between the third electrode portion 16C and the fourth electrode portion 16C. Output from the unit 16D to the outside (for example, an external substrate). Then, the measurement circuit mounted on the external board calculates the detected temperature based on the detected voltage from the temperature sensor 1 .
- the manufacturing method of the temperature sensor 1 has 1st to 10th steps.
- the support substrate 11 is prepared. More specifically, in the first step, a substrate main body, which is the base of the supporting substrate 11 of each of the plurality of temperature sensors 1, is prepared.
- the substrate body is, for example, a ceramic substrate.
- the material of the ceramic substrate as the substrate body is, for example, an alumina sintered body having an alumina content of 96% or more.
- a planarizing film 12 is formed on the first main surface of the substrate body. More specifically, in the second step, for example, the planarizing film 12 is formed by applying a material for the planarizing film 12 onto the first main surface of the substrate body and then baking the material.
- the first main surface of the substrate main body is a surface that becomes the first main surface 111 of each support substrate 11 of the plurality of temperature sensors 1 .
- the first resistance layer 13 and the second resistance layer 14 of each of the plurality of temperature sensors 1 are formed. More specifically, in the third step, the first resistance layer 13 and the second resistance layer 14 are formed on the planarizing film 12 by, for example, sputtering. Further, in the third step, the first resistor portion 131 is patterned by, for example, a photolithography method so that the shape of the first resistor portion 131 in the first resistor layer 13 has a meander shape.
- a protective film 15 is formed. More specifically, in the fourth step, for example, a paste of silicon dioxide is applied on the planarization film 12 by screen printing so as to partially cover the first resistance layer 13 and the second resistance layer 14, and then, A protective film 15 is formed by baking.
- a protective film 15 is formed as shown in FIG.
- a plurality of upper surface electrodes 161 for each of the plurality of temperature sensors 1 are formed on the first principal surface of the substrate body. More specifically, in the fifth step, for example, by forming a copper-nickel-based alloy film on the first main surface of the substrate body by sputtering, the plurality of upper surface electrodes 161 in each of the plurality of temperature sensors 1 are formed. .
- a plurality of lower surface electrodes 163 for each of the plurality of temperature sensors 1 are formed on the second main surface of the substrate body. More specifically, in the sixth step, for example, by forming a copper-nickel-based alloy film on the second main surface of the substrate body by sputtering, the plurality of lower surface electrodes 163 in each of the plurality of temperature sensors 1 are formed. .
- the second main surface of the substrate main body is the second main surface 112 of each support substrate 11 of the plurality of temperature sensors 1 .
- the plurality of temperature sensors 1 integrally formed in the first to sixth steps are cut into individual temperature sensors 1 . More specifically, in the seventh step, for example, a laser or dicing is used to cut the integrally formed multiple temperature sensors 1 into individual temperature sensors 1 .
- a plurality of end face electrodes 162 are formed on the individually cut temperature sensors 1 . More specifically, in the eighth step, for example, a copper-nickel-based alloy film is formed on the outer peripheral surface 113 of the support substrate 11 by sputtering, thereby forming the plurality of end face electrodes 162 in each of the plurality of temperature sensors 1. . Thereby, the plurality of upper surface electrodes 161 and the plurality of lower surface electrodes 163 are connected via the plurality of end surface electrodes 162 .
- a plurality of first plating layers 17 are formed on each of the plurality of temperature sensors 1 . More specifically, in the ninth step, for example, a plurality of first plating layers 17 are formed so as to cover the plurality of electrode portions 16 for each of the plurality of temperature sensors 1 .
- a plurality of second plating layers 18 are formed on each of the plurality of temperature sensors 1 . More specifically, in the tenth step, for example, a plurality of second plating layers 18 are formed so as to cover the plurality of first plating layers 17 for each of the plurality of temperature sensors 1 .
- the temperature sensor 1 according to the embodiment can be manufactured by the first to tenth steps described above.
- the First Electrode Portion is a Power Terminal
- the first electrode portion 16A is a power terminal like the temperature sensor 1 according to the embodiment
- the second electrode portion 16B is a ground terminal.
- the adjustment part 130 is formed, and the adjustment part 140 is formed in the second resistance part 141 .
- the adjustment portion 130 is a groove formed in the first resistance portion 131 .
- the adjustment portion 140 is a groove formed in the second resistance portion 141 .
- the first resistance section 131 has a plurality of (two in the illustrated example) adjustment sections 130 .
- one of the plurality of adjusting portions 130 has an elliptical shape elongated along the first direction D1, and the other has an elliptical shape elongated along the second direction D2.
- the second resistance section 141 has one adjustment section 140 .
- the shape of the adjustment portion 140 is L-shaped. This makes it possible to equalize the potential of the third electrode portion 16C and the potential of the fourth electrode portion 16D.
- the first resistance section 131 and the second resistance section 141 are specific resistance sections.
- each of the second resistance sections 142 and 143 has one adjustment section 140 .
- each adjusting portion 140 has an L shape. This makes it possible to equalize the potential of the third electrode portion 16C and the potential of the fourth electrode portion 16D.
- the two second resistors 142 and 143 are specific resistors.
- each adjusting portion 140 is formed in each.
- the adjustment portion 140 is a groove formed in each of the second resistance portions 142 and 143 .
- each of the second resistance sections 142 and 143 has one adjustment section 140 .
- each adjusting portion 140 has an L shape. This makes it possible to equalize the potential of the third electrode portion 16C and the potential of the fourth electrode portion 16D.
- the two second resistors 142 and 143 are specific resistors.
- the first resistance section 131 has a plurality of (two in the illustrated example) adjustment sections 130 .
- one of the plurality of adjusting portions 130 has an elliptical shape elongated along the first direction D1, and the other has an elliptical shape elongated along the second direction D2.
- the second resistance section 141 has one adjustment section 140 .
- the shape of the adjustment portion 140 is L-shaped. This makes it possible to equalize the potential of the third electrode portion 16C and the potential of the fourth electrode portion 16D.
- the first resistance section 131 and the second resistance section 141 are specific resistance sections.
- the first resistance section 131 and the plurality of second resistance sections 141 , 142 , 143 are formed on the planarization film 12 formed on the support substrate 11 . is formed in As a result, compared to the case where the first resistor section 131 and the plurality of second resistor sections 141, 142, and 143 are formed on the support substrate 11 without the planarization film 12 intervening, the first resistor section 131 and the plurality of second resistor sections 141, 142, 143 are formed. It becomes possible to planarize the two resistor portions 141, 142, and 143. As a result, since the rough surface roughness of the support substrate 11 does not directly become the surface roughness of the first resistance section 131 and the second resistance sections 141, 142, and 143, deterioration of temperature detection accuracy can be suppressed. becomes possible.
- the planarizing film 12 contains at least one material selected from the group consisting of zinc oxide, magnesium oxide, beryllium oxide, aluminum nitride, boron nitride, silicon nitride, and diamond. I'm in. Thereby, the thermal conductivity and linear expansion coefficient of the planarizing film 12 can be brought close to the thermal conductivity and linear expansion coefficient of the support substrate 11 .
- the material of the first resistance portion 131 contains platinum. This makes it possible to obtain a good temperature coefficient of resistance with respect to temperature.
- the material of the second resistance portions 141, 142, 143 contains the NiCrAlSi alloy. This makes it possible to use the second resistors 141, 142, and 143 as reference resistors whose temperature coefficient of resistance is substantially zero.
- the first resistance section 131 and the three second resistance sections 141, 142, 143 form a full bridge circuit. This makes it possible to amplify the detected voltage compared to the case where a half-bridge circuit is configured with the first resistance section and the second resistance section.
- the temperature sensor 1 includes the third electrode portion that outputs the output signal from the full bridge circuit composed of the first resistor portion 131 and the three second resistor portions 141, 142, and 143. 16C and a fourth electrode portion 16D. This makes it possible to output the output signal from the full bridge circuit to the outside.
- the first resistance section 131 and the second resistance section 141 have the adjustment sections 130 and 140 as described above. This makes it possible to adjust the resistance values of the first resistance portion 131 and the second resistance portion 141, and as a result, it is possible to equalize the potential of the third electrode portion 16C and the potential of the fourth electrode portion 16D. becomes. Furthermore, since each of the adjustment portions 130 and 140 is a groove formed in the first resistance portion 131 or the second resistance portion 141, the resistance value of the first resistance portion 131 and the resistance value of the second resistance portion 141 can be easily adjusted. can be adjusted to
- the material of the first resistance portion 131 is platinum in the above-described embodiment, the material of the first resistance portion 131 is not limited to platinum.
- the material of the first resistor portion 131 may include, for example, nickel (Ni), copper (Cu), or nickel-cobalt (NiCo) alloy.
- the material of the first resistance portion 131 may include two or more of platinum, nickel, copper, and nickel-cobalt alloy. In short, the material of the first resistance portion 131 should contain at least one of platinum, nickel, copper, and nickel-cobalt alloy.
- the shapes of the adjustment portion 130 of the first resistance portion 131 and the adjustment portion 140 of the second resistance portion 141 are merely examples, and may be other shapes. In other words, the shape of the adjustment portions 130 and 140 may be any shape as long as the resistance value of the first resistance portion 131 and the resistance value of the second resistance portion 141 can be adjusted.
- one first resistance section 131 and three second resistance sections 141, 142, and 143 form a full bridge circuit.
- a half-bridge circuit may be configured with the resistance section.
- two resistors are provided with the adjusters. is formed.
- the adjustment section 130 may be formed only in the first resistance section 131, or the adjustment section 130 may be formed only in the second resistance section 141. 140 may be formed.
- the material of the electrode portion 16 is a copper-nickel alloy, but the material of the electrode portion 16 is not limited to the copper-nickel alloy, and may be an alloy containing gold, for example.
- a temperature sensor (1) includes an alumina substrate (11), a planarizing film (12), a first resistor (131), and at least one second resistor (141, 142, 143). ) and The planarizing film (12) is mainly composed of alumina and is formed on the alumina substrate (11). A first resistor portion (131) is formed on the planarization film (12). The second resistors (141, 142, 143) are formed on the planarization film (12) and form a bridge circuit together with the first resistors (131).
- the planarizing film (12) contains filler.
- the filler is at least one selected from the group consisting of zinc oxide, magnesium oxide, beryllium oxide, aluminum nitride, boron nitride, silicon nitride and diamond. Contains seed material.
- the material of the first resistance part (131) is at least platinum, nickel, copper, nickel-cobalt alloy including one.
- the material of the second resistance parts (141, 142, 143) contains a NiCrAlSi alloy.
- the second resistor section (141, 142, 143) as a reference resistor whose temperature coefficient of resistance is substantially zero.
- a temperature sensor (1) in any one of the first to fifth aspects, has three second resistance portions (141, 142 , 143).
- the bridge circuit is a full bridge circuit composed of a first resistor (131) and three second resistors (141, 142, 143).
- a temperature sensor (1) is, in the sixth aspect, ) and further comprising: A first electrode portion (16A) and a second electrode portion (16B) supply power to the full bridge circuit.
- the third electrode portion (16C) and the fourth electrode portion (16D) output the output signal from the full bridge circuit to the outside.
- the specific resistance portion eg, the first resistance portion 131 and the second resistance portion 141 is the specific resistance portion has an adjustment part (130, 140) for adjusting the resistance value of The specific resistance section is at least one of the first resistance section (131) and the second resistance section (141, 142, 143).
- the temperature sensor (1) alone can correct the potential difference between the detection electrodes of the bridge circuit, zero point correction after mounting on the external substrate is unnecessary.
- the adjustment units (130, 140) are formed in the specific resistance units (eg, the first resistance unit 131 and the second resistance unit 141). It is a groove.
- the configurations according to the second to ninth aspects are not essential to the temperature sensor (1) and can be omitted as appropriate.
- first resistance portion specific resistance portion
- second resistance unit specific resistance unit
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Abstract
Description
(1)概要
実施形態に係る温度センサ1は、温度を測定するための電子部品である。温度センサ1は、例えば、後述の複数(例えば4つ)の電極部16を介して、外部基板(図示せず)の表面(実装面)に実装される表面実装型のチップ部品である。外部基板は、例えば、プリント配線板である。
以下、実施形態に係る温度センサ1の詳細について、図1~図7を参照して説明する。
まず、実施形態に係る温度センサ1の構造について、図1~図6を参照して説明する。
次に、実施形態に係る温度センサ1の回路構成について、図7を参照して説明する。
次に、実施形態に係る温度センサ1の製造方法について説明する。
次に、実施形態に係る温度センサ1の抵抗値の調整について、図2、図3及び図8を参照して説明する。
実施形態に係る温度センサ1のように、第1電極部16Aが電源端子である場合、第2電極部16Bはグランド端子である。
第2電極部16Bが電源端子である場合、第1電極部16Aはグランド端子である。
実施形態に係る温度センサ1では、上述したように、第1抵抗部131及び複数の第2抵抗部141,142,143は、支持基板11上に形成された平坦化膜12上に形成されている。これにより、平坦化膜12を介さずに支持基板11上に第1抵抗部131及び複数の第2抵抗部141,142,143を形成する場合に比べて、第1抵抗部131及び複数の第2抵抗部141,142,143を平坦化することが可能となる。その結果、支持基板11の粗い表面粗さが直接的に第1抵抗部131及び第2抵抗部141,142,143の表面粗さとなることがないため、温度の検出精度の劣化を抑制することが可能となる。
上述の実施形態は、本開示の様々な実施形態の一つにすぎない。上述の実施形態は、本開示の目的を達成できれば、設計等に応じて種々の変更が可能である。以下、上述の実施形態の変形例を列挙する。以下に説明する変形例は、適宜組み合わせて適用可能である。
本明細書には、以下の態様が開示されている。
11 支持基板(アルミナ基板)
12 平坦化膜
16A 第1電極部
16B 第2電極部
16C 第3電極部
16D 第4電極部
130 調整部
131 第1抵抗部(特定抵抗部)
140 調整部
141,142,143 第2抵抗部(特定抵抗部)
Claims (9)
- アルミナ基板と、
アルミナを主成分とし、前記アルミナ基板上に形成されている平坦化膜と、
前記平坦化膜上に形成されている第1抵抗部と、
前記平坦化膜上に形成されており、前記第1抵抗部とブリッジ回路を構成する少なくとも1つの第2抵抗部と、を備える、
温度センサ。 - 前記平坦化膜は、フィラーを含む、
請求項1に記載の温度センサ。 - 前記フィラーは、酸化亜鉛、酸化マグネシウム、酸化ベリリウム、窒化アルミニウム、窒化ホウ素、窒化シリコン及びダイヤモンドからなる群から選択される少なくとも1種の材料を含む、
請求項2に記載の温度センサ。 - 前記第1抵抗部の材料は、白金、ニッケル、銅、ニッケル-コバルト合金の少なくとも1つを含む、
請求項1~3のいずれか1項に記載の温度センサ。 - 前記第2抵抗部の材料は、NiCrAlSi合金を含む、
請求項1~4のいずれか1項に記載の温度センサ。 - 前記第2抵抗部として、3つの第2抵抗部を備え、
前記ブリッジ回路は、前記第1抵抗部と前記3つの第2抵抗部とで構成されるフルブリッジ回路である、
請求項1~5のいずれか1項に記載の温度センサ。 - 前記フルブリッジ回路に電力を供給する第1電極部及び第2電極部と、
前記フルブリッジ回路からの出力信号を外部に出力する第3電極部及び第4電極部と、を更に備える、
請求項6に記載の温度センサ。 - 前記第1抵抗部及び前記第2抵抗部の少なくとも1つの抵抗部である特定抵抗部は、前記特定抵抗部の抵抗値を調整するための調整部を有する、
請求項1~7のいずれか1項に記載の温度センサ。 - 前記調整部は、前記特定抵抗部に形成されている溝である、
請求項8に記載の温度センサ。
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US18/549,305 US20240175764A1 (en) | 2021-03-31 | 2022-03-28 | Temperature sensor |
CN202280017481.XA CN116981919A (zh) | 2021-03-31 | 2022-03-28 | 温度传感器 |
JP2023511283A JPWO2022210573A1 (ja) | 2021-03-31 | 2022-03-28 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03130630A (ja) * | 1989-10-17 | 1991-06-04 | Tama Electric Co Ltd | 温度検出回路網 |
JPH08290437A (ja) * | 1995-04-21 | 1996-11-05 | Mitsubishi Electric Corp | プレス成形装置およびプレス成形方法 |
JP2007027299A (ja) * | 2005-07-14 | 2007-02-01 | Matsushita Electric Ind Co Ltd | 薄膜抵抗体およびそれを用いた電子部品ならびにその製造方法 |
JP2017516081A (ja) * | 2014-03-26 | 2017-06-15 | ヘレウス センサー テクノロジー ゲーエムベーハー | セラミック担体、セラミック担体を有するセンサ素子、加熱素子およびセンサモジュール、ならびにセラミック担体の製造方法 |
-
2022
- 2022-03-28 US US18/549,305 patent/US20240175764A1/en active Pending
- 2022-03-28 JP JP2023511283A patent/JPWO2022210573A1/ja active Pending
- 2022-03-28 WO PCT/JP2022/015105 patent/WO2022210573A1/ja active Application Filing
- 2022-03-28 CN CN202280017481.XA patent/CN116981919A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03130630A (ja) * | 1989-10-17 | 1991-06-04 | Tama Electric Co Ltd | 温度検出回路網 |
JPH08290437A (ja) * | 1995-04-21 | 1996-11-05 | Mitsubishi Electric Corp | プレス成形装置およびプレス成形方法 |
JP2007027299A (ja) * | 2005-07-14 | 2007-02-01 | Matsushita Electric Ind Co Ltd | 薄膜抵抗体およびそれを用いた電子部品ならびにその製造方法 |
JP2017516081A (ja) * | 2014-03-26 | 2017-06-15 | ヘレウス センサー テクノロジー ゲーエムベーハー | セラミック担体、セラミック担体を有するセンサ素子、加熱素子およびセンサモジュール、ならびにセラミック担体の製造方法 |
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CN116981919A (zh) | 2023-10-31 |
US20240175764A1 (en) | 2024-05-30 |
JPWO2022210573A1 (ja) | 2022-10-06 |
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