JP6770238B2 - 湿度センサ - Google Patents
湿度センサ Download PDFInfo
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- JP6770238B2 JP6770238B2 JP2017071469A JP2017071469A JP6770238B2 JP 6770238 B2 JP6770238 B2 JP 6770238B2 JP 2017071469 A JP2017071469 A JP 2017071469A JP 2017071469 A JP2017071469 A JP 2017071469A JP 6770238 B2 JP6770238 B2 JP 6770238B2
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- 230000001681 protective effect Effects 0.000 claims description 38
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- 239000004065 semiconductor Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 48
- 238000000034 method Methods 0.000 description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 12
- 230000005684 electric field Effects 0.000 description 12
- 229910052710 silicon Inorganic materials 0.000 description 12
- 239000010703 silicon Substances 0.000 description 12
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 10
- 239000010931 gold Substances 0.000 description 9
- 229910052737 gold Inorganic materials 0.000 description 8
- 229910052697 platinum Inorganic materials 0.000 description 8
- 229910052703 rhodium Inorganic materials 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- 239000004642 Polyimide Substances 0.000 description 6
- 238000001020 plasma etching Methods 0.000 description 6
- 229920001721 polyimide Polymers 0.000 description 6
- 239000007772 electrode material Substances 0.000 description 5
- 229910000510 noble metal Inorganic materials 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
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- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 229910018125 Al-Si Inorganic materials 0.000 description 3
- 229910018520 Al—Si Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910018594 Si-Cu Inorganic materials 0.000 description 3
- 229910008465 Si—Cu Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
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- 239000002861 polymer material Substances 0.000 description 3
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
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- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
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- 238000004528 spin coating Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/227—Sensors changing capacitance upon adsorption or absorption of fluid components, e.g. electrolyte-insulator-semiconductor sensors, MOS capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
第1実施形態に係る湿度センサについて説明する。図3は、第1実施形態に係る湿度センサを示す概略断面図である。
第2実施形態に係る湿度センサについて説明する。図12は、第2実施形態に係る湿度センサを示す概略断面図である。
実施例1では、基板11、絶縁膜12、第1の感湿膜15及び第2の感湿膜19の特性を以下に示すパラメータに固定し、下部電極13に対する上部電極17の面積(外形)を変化させたときの静電容量値(arbitrary unit)をシミュレーションにより算出した。なお、第1の感湿膜15の面積は、上部電極17の面積よりも大きくなるように設定した。また、動作時の基板11の電位を浮遊(Float)状態とし、下部電極13を1V、上部電極17を0Vとして湿度センサを動作させた。
基板11 シリコン基板
絶縁膜12 SiO2膜(膜厚:5μm、比誘電率3.9)
第1の感湿膜15 PI膜(膜厚:1μm、0%Rh相当時の比誘電率:3.69、100%Rh相当時の比誘電率:4.19)
第2の感湿膜19 PI膜(膜厚:2μm、0%Rh相当時の比誘電率:3.69、100%Rh相当時の比誘電率:4.19)
図16は、実施例1に係る湿度センサにおける水付着の影響の防止効果を示す図である。図中、横軸は上部電極17の1辺の長さから下部電極13の1辺の長さを引いた値(μm)を示す。即ち、上部電極17の面積と下部電極13の面積とが等しい場合に0となり、上部電極17の面積が下部電極13の面積よりも大きい場合に正の値となり、上部電極17の面積が下部電極13の面積よりも小さい場合に負の値となる。また、図中、縦軸は静電容量値(arbitrary unit)を示す。また、図中、菱形マークでプロットされたラインA1は、第1の感湿膜15の乾燥時(湿度0%Rh、比誘電率3.69)の静電容量値の変化を示す。四角マークでプロットされたラインB1は、第1の感湿膜15の多湿時(湿度100%Rh、比誘電率4.19)の静電容量値の変化を示す。三角マークでプロットされたラインC1は、センサの表面に水が付着した状態(多湿状態+水付着)での静電容量値の変化を示す。
実施例2では、動作時の基板11の電位を0Vに固定(接地)した点以外は、実施例1と同様の条件でシミュレーションを行った。
11 基板
13 下部電極
15 第1の感湿膜
17 上部電極
17a 開口部
19 第2の感湿膜
22 開口
Claims (8)
- 基板の上に形成された下部電極と、
前記下部電極を覆う第1の感湿膜と、
前記第1の感湿膜の上に形成されて所定の開口パターンを有する上部電極と、
前記上部電極を覆うと共に前記上部電極の開口部で前記第1の感湿膜に接続された第2の感湿膜と、
を有し、
前記上部電極は、前記基板と電気的に接続されており、
前記上部電極の面積は、前記下部電極の面積よりも大きく、且つ前記第1の感湿膜の面積よりも小さい、
湿度センサ。 - 前記第1の感湿膜には、開口が形成されており、
前記上部電極は、前記開口を介して前記基板と電気的に接続されていることを特徴とする請求項1に記載の湿度センサ。 - 前記上部電極は、当該湿度センサの外部で前記基板と電気的に接続されていることを特徴とする請求項1に記載の湿度センサ。
- 前記基板は、動作時に電位が固定されることを特徴とする請求項1乃至3のいずれか一項に記載の湿度センサ。
- 前記基板は、p型の半導体により形成されており、且つ接地されていることを特徴とする請求項4に記載の湿度センサ。
- 前記基板は、n型の半導体により形成されており、且つ正の電位に固定されていることを特徴とする請求項4に記載の湿度センサ。
- 前記上部電極の全周を覆う保護膜を有する、
請求項1乃至6のいずれか一項に記載の湿度センサ。 - 前記第2の感湿膜の上に、前記上部電極の最外周縁から最外周の前記開口部までの間を開始位置とし、前記湿度センサの外周に向かって配置された樹脂を有する、
請求項1乃至7のいずれか一項に記載の湿度センサ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017071469A JP6770238B2 (ja) | 2017-03-31 | 2017-03-31 | 湿度センサ |
PCT/JP2018/007053 WO2018180107A1 (ja) | 2017-03-31 | 2018-02-26 | 湿度センサ |
CN201880019163.0A CN110494744B (zh) | 2017-03-31 | 2018-02-26 | 湿度传感器 |
US16/491,247 US11435310B2 (en) | 2017-03-31 | 2018-02-26 | Humidity sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017071469A JP6770238B2 (ja) | 2017-03-31 | 2017-03-31 | 湿度センサ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2018173335A JP2018173335A (ja) | 2018-11-08 |
JP6770238B2 true JP6770238B2 (ja) | 2020-10-14 |
Family
ID=63675309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2017071469A Active JP6770238B2 (ja) | 2017-03-31 | 2017-03-31 | 湿度センサ |
Country Status (4)
Country | Link |
---|---|
US (1) | US11435310B2 (ja) |
JP (1) | JP6770238B2 (ja) |
CN (1) | CN110494744B (ja) |
WO (1) | WO2018180107A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107668019A (zh) * | 2017-10-24 | 2018-02-09 | 好得科技(深圳)有限公司 | 一种智能侦测安全保护电捕鼠器 |
US11313824B2 (en) | 2018-11-16 | 2022-04-26 | Minebea Mitsumi Inc. | Detecting device |
JP7193203B2 (ja) | 2018-11-16 | 2022-12-20 | ミネベアミツミ株式会社 | 検出装置 |
JP2021092453A (ja) * | 2019-12-11 | 2021-06-17 | ミネベアミツミ株式会社 | 湿度センサ |
CN110927224B (zh) * | 2019-12-13 | 2021-07-23 | 潍坊歌尔微电子有限公司 | 基于聚酰亚胺的湿度传感器及其制备方法 |
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2017
- 2017-03-31 JP JP2017071469A patent/JP6770238B2/ja active Active
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2018
- 2018-02-26 WO PCT/JP2018/007053 patent/WO2018180107A1/ja active Application Filing
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