JP4812139B2 - マイクロ機械加工されたマイクロフォンおよびマルチセンサ、ならびにそれらを生産する方法 - Google Patents
マイクロ機械加工されたマイクロフォンおよびマルチセンサ、ならびにそれらを生産する方法 Download PDFInfo
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- 229920002120 photoresistant polymer Polymers 0.000 claims description 35
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 26
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- H—ELECTRICITY
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- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00134—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems comprising flexible or deformable structures
- B81C1/00182—Arrangements of deformable or non-deformable structures, e.g. membrane and cavity for use in a transducer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/005—Electrostatic transducers using semiconductor materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/02—Sensors
- B81B2201/0228—Inertial sensors
- B81B2201/0235—Accelerometers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/02—Sensors
- B81B2201/0257—Microphones or microspeakers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
- H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
- H01L2224/491—Disposition
- H01L2224/49105—Connecting at different heights
- H01L2224/49109—Connecting at different heights outside the semiconductor or solid-state body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/1515—Shape
- H01L2924/15151—Shape the die mounting substrate comprising an aperture, e.g. for underfilling, outgassing, window type wire connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Description
本発明の実施形態において、マイクロ機械加工されたマイクロフォンは、シリコンウェハまたはシリコンオンインシュレーター(SOI)ウェハから形成される。当該分野に公知なように、SOIウェハは、通常は、デバイス層と呼ばれる上面シリコン層、中間絶縁体(酸化物)層、および通常は上面シリコン層よりもはるかに厚い(約650ミクロン)底面シリコン層を含む。本発明において、シリコンウェハまたはSOIウェハのいずれかで形成された上面層は、本発明の一部の実施形態において約10ミクロンの厚さであり得、他の実施形態において、さらに厚く、約50ミクロンの厚さであり得る。本発明の実施形態において、固定感知電極(本明細書中において「バックプレート」とも呼ばれる)は、ウェハの上面シリコン層から形成され、ダイヤフラムは、上面シリコン層より上に吊るされるように形成される。穿孔が、固定感知電極において形成されることによって、音波が、ウェハの底面側からダイヤフラムに到達することを可能にする。上面シリコン層の裏側にある酸化物層は、SOIウェハの固有酸化物層またはシリコンウェハ上に堆積した酸化物層であり得、エッチ停止層として用いられることによって、固定感知電極の機械加工を制御する。本発明の特定の実施形態において、慣性センサ、例えばマイクロ機械加工された加速度計またはジャイロスコープは、マイクロフォンとして同一のウェハ上に形成される。簡素化のために、そのような配列は、下文において「マルチセンサ」と参照され得、それは、該センサが、単一のチップ上に複数のマイクロ機械加工されたセンサ要素を含むからである。マイクロフォンのダイヤフラムは、外気に触れるように開いているが、慣性センサは、密閉式に密封されるように提供される。
Claims (20)
- 少なくとも第1のシリコン層を有するウェハからマイクロ機械加工されたマイクロフォンを製造する方法であって、該方法は、
該第1のシリコン層を介してトレンチを形成することと、
該第1のシリコン層の表側を覆い、該トレンチをライニングする第1の酸化物層を堆積させることと、
該第1の酸化物層に複数の犠牲のポリシリコンのマイクロフォン構造を形成することと、
該第1の酸化物層および該犠牲のポリシリコンのマイクロフォン構造の上に第2の酸化物層を堆積させることと、
該第2の酸化物層に、ダイヤフラムを含む複数のポリシリコンのマイクロフォン構造を形成することと、
該犠牲のポリシリコンのマイクロフォン構造を除去することと、
該トレンチを介して、該第1のシリコン層の裏側から、複数のポリシリコンのマイクロフォン構造の下にある少なくとも1つの酸化物層のうちの一部分を除去することと
を包含する、方法。 - 前記第1の酸化物層に前記複数の犠牲のポリシリコン構造を形成することは、
該第1の酸化物層を覆い前記ライニングされたトレンチを充填するポリシリコン層を堆積させることと、
該ポリシリコン層をパターニングすることによって前記複数の犠牲のポリシリコンのマイクロフォン構造を形成することと
を包含する、請求項1に記載の方法。 - 前記複数のポリシリコン構造の下にある前記少なくとも1つの酸化物層の前記一部分を除去する前に、
該少なくとも1つの酸化物層および前記複数のポリシリコン構造の上に追加の酸化物層を形成することと、
該追加の酸化物層をパターニングすることによってポリシリコン構造の一部および前記第1のシリコン層の一部を露出させることと、
少なくとも該ポリシリコン構造の該露出した部分および該第1のシリコン層の該露出した部分に金属電極を形成することと
をさらに包含する、請求項1に記載の方法。 - 前記複数のポリシリコン構造の下にある前記少なくとも1つの酸化物層の前記一部分を除去する前に、
前記ウェハをパターニングすることによって、前記ダイヤフラムの少なくとも一部分を露出させることと、
該ダイヤフラムの該露出した一部分の上に、該ダイヤフラムの少なくとも1つの穴の上から第1のフォトレジスト層を堆積させることと、
フォトレジスト材料をパターニングすることによって、該ダイヤフラムの該一部分を再び露出させることと、
該ダイヤフラムにおける該少なくとも1つの穴の下の酸化物の一部分を除去することと、
該ダイヤフラムにおける該少なくとも1つの穴の下にペデスタルを形成する第2のフォトレジスト層を堆積させることであって、該ペデスタルは、該複数のポリシリコン構造の下にある該少なくとも1つの酸化物層の該一部分の除去の間に、該ダイヤフラムを支持する、ことと、
該複数のポリシリコン構造の下にある該少なくとも1つの酸化物層の該一部分を除去した後に、該ペデスタルを除去することと
をさらに包含する、請求項1に記載の方法。 - 前記ポリシリコンのマイクロフォン構造の形成の間に、複数の慣性センサ構造を形成することをさらに包含する、請求項1に記載の方法。
- 前記複数の犠牲のポリシリコンのマイクロフォン構造の形成の間に、前記第1の酸化物層上に複数の犠牲のポリシリコンの慣性センサ構造を形成することと、
該犠牲のポリシリコンの慣性センサ構造の上に前記第2の酸化物層を堆積させることと、
該犠牲のポリシリコンの慣性センサ構造を除去することと
をさらに包含する、請求項1に記載の方法。 - 前記犠牲のポリシリコンのマイクロフォン構造の形成の間に、前記ポリシリコン層をパターニングすることによって前記複数の犠牲のポリシリコンの慣性センサ構造を形成することをさらに包含する、請求項2に記載の方法。
- 前記ウェハは、第2のシリコン層と、前記第1のシリコン層と該第2のシリコン層の間の中間酸化物層とをさらに含み、
該第1のシリコン層の前記裏側から前記複数のポリシリコンのマイクロフォン構造の下にある前記少なくとも1つの酸化物層の前記一部分を除去することは、
該第2のシリコン層および該中間酸化物層の下にある部分を除去することによって裏側の空洞を形成することと、
該裏側の空洞を介して該複数のポリシリコンのマイクロフォン構造の下にある該少なくとも1つの酸化物層の該一部分を除去することと
を包含する、請求項1に記載の方法。 - 前記ウェハは、第2のシリコン層と、前記第1のシリコン層と該第2のシリコン層の間の中間酸化物層とをさらに含み、
該第1のシリコン層の前記裏側から前記複数のポリシリコンのマイクロフォン構造の下にある前記少なくとも1つの酸化物層の前記一部分を除去することは、
該第2のシリコン層および該少なくとも1つの中間酸化物層の下にある部分を除去することによって前記マイクロフォンおよび前記慣性センサのための裏側の空洞を形成することと、
該裏側の空洞を介して該マイクロフォン構造および該慣性センサの構造の下にある少なくとも1つの中間材料の部分を除去することと
を包含する、請求項5に記載の方法。 - 前記第2のシリコン層の裏側にガラス層を形成することをさらに包含し、
該ガラス層は、前記慣性センサのための裏側の空洞を覆い、密封しているが、前記マイクロフォンのための裏側の空洞は覆っていない、請求項9に記載の方法。 - 前記複数のトレンチは、音波が、前記第1のシリコン層の前記裏側から前記ダイヤフラムに到達することを可能にする、請求項1に記載の方法。
- 前記第1のシリコン層は、SOIウェハのデバイス層である、請求項1に記載の方法。
- 少なくとも第1のシリコン層を有するウェハであって、該ウェハは、該第1のシリコン層を介して形成された複数のトレンチを含む、ウェハと、
該第1のシリコン層の表側にある第1の酸化物層であって、該トレンチをライニングする第1の酸化物層と、
該第1の酸化物層上の犠牲のポリシリコン層と、
該犠牲のポリシリコン層上の第2の酸化物層と、
該第2の酸化物上のダイヤフラムを含む複数のポリシリコンのマイクロフォン構造であって、該犠牲のポリシリコン層は、該ダイヤフラムの少なくとも一部分の下にある将来的なペデスタルの位置に開口部を含み、該第1の酸化物層、該犠牲のポリシリコン層および該第2の酸化物層は、基板と該ダイヤフラムの間にある、装置。 - 第1のシリコンウェハの表側の上に形成された複数のポリシリコンの慣性センサ構造をさらに備え、
前記複数のポリシリコンのマイクロフォン構造および該複数のポリシリコンの慣性センサ構造は、実質的に同一の工程を用いて、実質的に同時に形成される、請求項13に記載の装置。 - 前記ウェハは、第2のシリコン層と、前記第1のシリコン層と該第2のシリコン層の間の中間酸化物層とをさらに含み、
該第2のシリコン層と該中間酸化物層との下にある部分は、前記トレンチを露出させる裏側の空洞を形成するように除去される、請求項13に記載の装置。 - 前記トレンチは、前記裏側の空洞を介する前記第1のシリコン層を介して形成される、請求項15に記載の装置。
- 前記複数のトレンチは、音波が、前記第1のシリコン層の前記裏側から前記ダイヤフラムに到達することを可能にする、請求項13に記載の装置。
- 前記ダイヤフラムは、パターニングされたばね上で支持されている、請求項13に記載の装置。
- 前記ウェハがSOIウェハを含む、請求項13に記載の装置。
- 同一のダイ上に慣性センサをさらに備えている、請求項19に記載の装置。
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Application Number | Priority Date | Filing Date | Title |
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US11/113,925 US7825484B2 (en) | 2005-04-25 | 2005-04-25 | Micromachined microphone and multisensor and method for producing same |
US11/113,925 | 2005-04-25 | ||
PCT/US2006/014982 WO2006116017A2 (en) | 2005-04-25 | 2006-04-21 | Micromachined microphone and multisensor and method for producing same |
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JP2008539666A JP2008539666A (ja) | 2008-11-13 |
JP2008539666A5 JP2008539666A5 (ja) | 2009-09-10 |
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JP2011164611A Expired - Fee Related JP5317231B2 (ja) | 2005-04-25 | 2011-07-27 | マイクロ機械加工されたマイクロフォンおよびマルチセンサ、ならびにそれらを生産する方法 |
JP2013097305A Expired - Fee Related JP5950863B2 (ja) | 2005-04-25 | 2013-05-07 | マイクロ機械加工されたマイクロフォンおよびマルチセンサ、ならびにそれらを生産する方法 |
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EP (1) | EP1878306B1 (ja) |
JP (3) | JP4812139B2 (ja) |
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CN101208990B (zh) | 2012-03-14 |
WO2006116017A2 (en) | 2006-11-02 |
US20110103622A1 (en) | 2011-05-05 |
WO2006116017A3 (en) | 2007-02-08 |
CN101208990A (zh) | 2008-06-25 |
US20100285628A1 (en) | 2010-11-11 |
EP1878306B1 (en) | 2014-11-19 |
JP2011254517A (ja) | 2011-12-15 |
CN102572662A (zh) | 2012-07-11 |
US20130236036A1 (en) | 2013-09-12 |
EP1878306A2 (en) | 2008-01-16 |
US8934648B2 (en) | 2015-01-13 |
JP2013176147A (ja) | 2013-09-05 |
CN102572662B (zh) | 2016-06-29 |
US8129803B2 (en) | 2012-03-06 |
US8422703B2 (en) | 2013-04-16 |
US20060237806A1 (en) | 2006-10-26 |
JP5950863B2 (ja) | 2016-07-13 |
JP2008539666A (ja) | 2008-11-13 |
US7825484B2 (en) | 2010-11-02 |
JP5317231B2 (ja) | 2013-10-16 |
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