JP2017166926A - 磁気センサおよびその製造方法 - Google Patents
磁気センサおよびその製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 78
- 239000004065 semiconductor Substances 0.000 claims abstract description 51
- 238000007747 plating Methods 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 22
- 239000012790 adhesive layer Substances 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 11
- 238000009713 electroplating Methods 0.000 claims abstract description 8
- 230000004907 flux Effects 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 17
- 238000005530 etching Methods 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 238000000137 annealing Methods 0.000 description 7
- 239000010408 film Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229910000815 supermalloy Inorganic materials 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0052—Manufacturing aspects; Manufacturing of single devices, i.e. of semiconductor magnetic sensor chips
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R3/00—Apparatus or processes specially adapted for the manufacture or maintenance of measuring instruments, e.g. of probe tips
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
- G01R33/077—Vertical Hall-effect devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B61/00—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices
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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
- H10N52/00—Hall-effect devices
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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
- H10N52/00—Hall-effect devices
- H10N52/01—Manufacture or treatment
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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
- H10N52/00—Hall-effect devices
- H10N52/101—Semiconductor Hall-effect devices
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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
- H10N52/00—Hall-effect devices
- H10N52/80—Constructional details
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- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Hall/Mr Elements (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Description
まず、ホール素子の磁気検出原理について説明する。物質中に流れる電流に対して垂直な磁界を印加するとその電流と磁界の双方に対して垂直な方向に電界(ホール電圧)が生じる。そのため、一般的なホール素子は、シリコンなどの半導体基板(ウェハ)表面に電流を流して、垂直な磁界成分を検出する。
したがって、本発明は、応力による影響を抑え、磁気特性のシフトやばらつきが小さい磁気センサおよびその製造方法を提供することを目的とする。
図1は、本発明の実施形態の磁気センサの構造を示す断面図である。
図1に示すように、本実施形態の磁気センサは、半導体基板1と、半導体基板1の表面に設けられ、互いに離間して配置された一対のホール素子2と、ホール素子2を含む半導体基板表面を覆う保護膜3と、半導体基板1の裏面上に設けられた接着層40と、接着層40を介して半導体基板1の裏面上に載置された磁気収束板10と、磁気収束板10の接着層40と反対側の表面上に設けられた導電層11とを備えている。
図2〜4は、本実施形態の磁気センサの製造方法を示す工程断面図であり、図2は、ホール素子の製造プロセス、図3は、磁気収束板の製造プロセス、図4は、半導体基板と磁気収束板とを貼り合わせるプロセスを示している。
続いて、図2(b)に示すように、ホール素子2及び周辺回路が形成された半導体基板1の裏面を研削し、半導体基板1の厚みを100〜400μm程度まで薄くする。
さらに、図3(e)に示すように、磁気収束板10をマスクとして下地導電層11をエッチング除去する。
例えば、上記実施形態においては、保護膜3を形成しているが、必ずしも設けなくても構わない。
また、上記実施形態は、半導体基板1としてP型半導体基板を用いた例を示しているが、N型半導体基板を用いることも可能である。
2 ホール素子
3 保護膜
10 磁気収束板
11 下地導電層
20 レジスト
30 めっき用基板
40 接着剤(接着層)
Claims (7)
- 表面にホール素子を備えた半導体基板と、
前記半導体基板の裏面上に設けられた接着層と、
前記接着層上に設けられた磁気収束板と、
を備える磁気センサ。 - 前記磁気収束板の前記接着層と反対側の表面上に設けられた導電層をさらに備えることを特徴とする請求項1に記載の磁気センサ。
- 前記半導体基板の厚さが100〜400μmであることを特徴とする請求項1または2に記載の磁気センサ。
- 前記磁気収束板の厚さが20〜50μmであ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磁気センサ。
- 半導体基板の表面にホール素子を形成する工程と、
めっき用基板上に下地導電層を形成する工程と、
前記下地導電層上に磁気収束板形成用の開口を有するレジストを形成する工程と、
前記レジストが形成された状態で電解めっきを行い、前記開口内に磁気収束板を形成する工程と、
前記レジストを除去する工程と、
前記磁気収束板をマスクとして前記下地導電層をエッチング除去する工程と、
前記磁気収束板上に接着剤を塗布する工程と、
前記半導体基板の裏面と前記めっき用基板上に形成された前記磁気収束板とを前記接着剤により貼り合わせる工程と、
前記めっき用基板を前記下地導電層から剥離する工程とを備えることを特徴とする磁気センサの製造方法。 - 前記半導体基板の裏面を研削して、前記半導体基板の厚さを100〜400μmにする工程をさらに含むことを特徴とする請求項5に記載の磁気センサの製造方法。
- 前記磁気収束板の厚さが20〜50μmであることを特徴とする請求項5または6に記載の磁気センサの製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016051498A JP6868963B2 (ja) | 2016-03-15 | 2016-03-15 | 磁気センサおよびその製造方法 |
TW106107897A TWI728065B (zh) | 2016-03-15 | 2017-03-10 | 磁性感測器及其製造方法 |
US15/458,499 US10429453B2 (en) | 2016-03-15 | 2017-03-14 | Magnetic sensor and method of manufacturing the same |
KR1020170031954A KR102343804B1 (ko) | 2016-03-15 | 2017-03-14 | 자기 센서 및 그 제조 방법 |
CN201710154124.9A CN107192406A (zh) | 2016-03-15 | 2017-03-15 | 磁传感器及其制造方法 |
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JP2016051498A JP6868963B2 (ja) | 2016-03-15 | 2016-03-15 | 磁気センサおよびその製造方法 |
Related Child Applications (1)
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JP2021000318A Division JP2021071488A (ja) | 2021-01-05 | 2021-01-05 | 磁気センサ |
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JP2017166926A true JP2017166926A (ja) | 2017-09-21 |
JP6868963B2 JP6868963B2 (ja) | 2021-05-12 |
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JP2016051498A Active JP6868963B2 (ja) | 2016-03-15 | 2016-03-15 | 磁気センサおよびその製造方法 |
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Country | Link |
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US (1) | US10429453B2 (ja) |
JP (1) | JP6868963B2 (ja) |
KR (1) | KR102343804B1 (ja) |
CN (1) | CN107192406A (ja) |
TW (1) | TWI728065B (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019095319A (ja) * | 2017-11-24 | 2019-06-20 | Tdk株式会社 | 磁気センサ |
JP2020134419A (ja) * | 2019-02-25 | 2020-08-31 | Tdk株式会社 | 磁気センサ及びその製造方法 |
EP3742182A1 (en) | 2019-05-24 | 2020-11-25 | Melexis Technologies SA | Semiconductor device with embedded magnetic flux concentrator |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9741924B2 (en) * | 2015-02-26 | 2017-08-22 | Sii Semiconductor Corporation | Magnetic sensor having a recessed die pad |
KR20210128001A (ko) * | 2019-03-20 | 2021-10-25 | 비테스코 테크놀로지스 게엠베하 | 각도 검출 디바이스 |
EP4187262A1 (en) * | 2021-11-25 | 2023-05-31 | Melexis Technologies SA | Stress reduction layer based on coating technique |
CN114784180B (zh) * | 2022-06-21 | 2022-09-30 | 苏州矩阵光电有限公司 | 一种磁铁阵列加工方法 |
Citations (5)
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JPH04106988A (ja) * | 1990-08-27 | 1992-04-08 | Asahi Chem Ind Co Ltd | InAsホール素子 |
US5883567A (en) * | 1997-10-10 | 1999-03-16 | Analog Devices, Inc. | Packaged integrated circuit with magnetic flux concentrator |
WO2007119569A1 (ja) * | 2006-04-13 | 2007-10-25 | Asahi Kasei Emd Corporation | 磁気センサ及びその製造方法 |
JP2007333721A (ja) * | 2006-05-18 | 2007-12-27 | Asahi Kasei Electronics Co Ltd | 磁気センサ及びその製造方法 |
US20140367813A1 (en) * | 2013-06-12 | 2014-12-18 | Magnachip Seminconductor, Ltd. | Magnetic sensor and method of manufacture thereof |
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2016
- 2016-03-15 JP JP2016051498A patent/JP6868963B2/ja active Active
-
2017
- 2017-03-10 TW TW106107897A patent/TWI728065B/zh not_active IP Right Cessation
- 2017-03-14 KR KR1020170031954A patent/KR102343804B1/ko active IP Right Grant
- 2017-03-14 US US15/458,499 patent/US10429453B2/en not_active Expired - Fee Related
- 2017-03-15 CN CN201710154124.9A patent/CN107192406A/zh active Pending
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JP2019095319A (ja) * | 2017-11-24 | 2019-06-20 | Tdk株式会社 | 磁気センサ |
JP7119351B2 (ja) | 2017-11-24 | 2022-08-17 | Tdk株式会社 | 磁気センサ |
JP2020134419A (ja) * | 2019-02-25 | 2020-08-31 | Tdk株式会社 | 磁気センサ及びその製造方法 |
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Also Published As
Publication number | Publication date |
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TW201735338A (zh) | 2017-10-01 |
US10429453B2 (en) | 2019-10-01 |
TWI728065B (zh) | 2021-05-21 |
KR102343804B1 (ko) | 2021-12-27 |
US20170269169A1 (en) | 2017-09-21 |
JP6868963B2 (ja) | 2021-05-12 |
CN107192406A (zh) | 2017-09-22 |
KR20170107402A (ko) | 2017-09-25 |
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