JP2004209640A - エピタキシャルリアクタにおける表面マイクロマシニングされた構造のためのギャップチューニング - Google Patents
エピタキシャルリアクタにおける表面マイクロマシニングされた構造のためのギャップチューニング Download PDFInfo
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- 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
- B81C1/00023—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems without movable or flexible elements
- B81C1/00055—Grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
- B81B3/0064—Constitution or structural means for improving or controlling the physical properties of a device
- B81B3/0086—Electrical characteristics, e.g. reducing driving voltage, improving resistance to peak voltage
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- B81C2201/00—Manufacture or treatment of microstructural devices or systems
- B81C2201/01—Manufacture or treatment of microstructural devices or systems in or on a substrate
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- B81C2201/0112—Bosch process
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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
- B81C2203/00—Forming microstructural systems
- B81C2203/01—Packaging MEMS
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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
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Abstract
【解決手段】デバイスの上部層における少なくとも1つのマイクロメカニカルエレメントの輪郭をエッチングし、該輪郭が、少なくとも1つのマイクロメカニカルエレメントの複数の面のうちの少なくとも2つの向き合った面を規定しており、エピタキシャルリアクタにおいて複数の面のうちの少なくとも2つの向き合った面にギャップ狭め層を堆積させ、複数の面のうちの少なくとも2つの向き合った面の間のギャップが、ギャップ狭め層によって狭められるようになっている。
【選択図】図2a
Description
Claims (29)
- デバイス上の少なくとも1つのマイクロメカニカルエレメントの複数の面の間のギャップをチューニングする方法において、
デバイスの上部層において少なくとも1つのマイクロメカニカルエレメントの輪郭をエッチングし、該輪郭が、少なくとも1つのマイクロメカニカルエレメントの複数の面のうちの少なくとも2つの向き合った面を規定しており、
エピタキシャルリアクタにおいて複数の面のうちの少なくとも2つの向き合った面にギャップ狭め層を堆積させ、
複数の面のうちの少なくとも2つの向き合った面の間のギャップが、ギャップ狭め層によって狭められるようになっていることを特徴とする、デバイス上の少なくとも1つのマイクロメカニカルエレメントの複数の面の間のギャップをチューニングする方法。 - ギャップ狭め層がシリコン層を含む、請求項1記載の方法。
- 前記ギャップ狭め層がゲルマニウム層を含む、請求項1記載の方法。
- 前記ギャップ狭め層がシリコン/ゲルマニウム層を含む、請求項1記載の方法。
- 前記デバイスが、
基板層と;
該基板層の少なくとも第1の部分上に堆積された犠牲層と;
上部層を形成するために犠牲層の少なくとも第2の部分上に堆積された機能層とを含む、請求項1記載の方法。 - 前記犠牲層が二酸化ケイ素を含み;
ギャップ狭め層の堆積中に、犠牲層上への堆積が、エピタキシャルリアクタの温度、圧力及びガス組成のうちの少なくとも1つを調節することによって選択的に回避される、請求項5記載の方法。 - エピタキシャルリアクタのガス組成が、臭素、塩素、フッ素又は水素のうちの少なくとも1つの化合物を含む、請求項6記載の方法。
- さらなる犠牲層を提供することか;又は
さらなる機能層を提供することのうちの少なくとも1つを含む、請求項5記載の方法。 - さらなる犠牲層を提供することか又はさらなる機能層を提供することのうちの少なくとも1つが、輪郭エッチング作業の前に行われる、請求項8記載の方法。
- さらなる犠牲層をエッチングすることを含む、請求項8記載の方法。
- 前記デバイスがSOIウェハを含み、SOIウェハの絶縁層が犠牲層を形成しており、SOIウェハの上部シリコン層が上部層を形成している、請求項1記載の方法。
- 堆積作業がさらに、
H2流にシラン、ジクロロシラン又はトリクロロシランのうちの1つを連行させ、
デバイス上にH2流を通過させることを含む、請求項1記載の方法。 - さらに、残ったギャップ幅を検出し;
残ったギャップ幅が所望のギャップ幅にほぼ等しくなった場合にギャップ狭め層の堆積を終了させることを含む、請求項1記載の方法。 - 検出作業が、光学検出器を用いて残ったギャップ幅を検出することを含む、請求項13記載の方法。
- 光学検出器が、デバイスから屈折された光から干渉パターンを検出する、請求項14記載の方法。
- 光学検出器が、デバイスのより高い面から反射された第1の光反射と、デバイスのより低い面から反射された第2の光反射とを検出し;
前記第1の光反射が、第1の光強度と第1の光位相との少なくとも1つを含み;
前記第2の光反射が、第2の光強度と第2の光位相との少なくとも1つを含み;
第1の光反射と第2の光反射との比が決定される、請求項14記載の方法。 - ギャップ狭め層の堆積が、選択的な堆積プロセスを含む、請求項1記載の方法。
- ギャップ狭め層の堆積が、均等な堆積プロセスを含む、請求項1記載の方法。
- 少なくとも2つの向き合った面を有する上部層と;
エピタキシャルに堆積された少なくとも2つの層とが設けられており、該エピタキシャルに堆積された少なくとも2つの層のそれぞれが、少なくとも2つの向き合った面のそれぞれ1つに配置されており、エピタキシャルに堆積された少なくとも2つの層の合計の厚さが、少なくとも2つの向き合った面の間のギャップをチューニングすることを特徴とする、デバイス。 - エピタキシャルに堆積された少なくとも2つの層のうちの少なくとも1つが、シリコン層、ゲルマニウム層、又はシリコン/ゲルマニウム層のうちの少なくとも1つを含む、請求項19記載のデバイス。
- 少なくとも2つの向き合った面が、デバイスの上部層において少なくとも1つのマイクロメカニカルエレメントを規定している、請求項19記載のデバイス。
- 基板層と;
該基板層の第1の部分上に堆積された犠牲層とが設けられており;
上部層が、犠牲層の少なくとも第2の部分にエピタキシャルに堆積された少なくとも1つの機能層を含む、請求項19記載のデバイス。 - 基板層の下方に配置された別の犠牲層とが設けられており、
デバイスを気体水素に曝露することによって前記別の犠牲層が基板層から解放される、請求項22記載のデバイス。 - 前記犠牲層が二酸化ケイ素を含み、
ギャップ狭め層の堆積中に、犠牲層上の堆積が、エピタキシャルリアクタの温度、圧力、又はガス組成のうちの少なくとも1つを調節することによって選択的に回避される、請求項22記載のデバイス。 - さらにSOIウェハを含み、絶縁層が犠牲層を形成しており、上部シリコン層が上部層を形成している、請求項19記載のデバイス。
- エピタキシャルに堆積された少なくとも2つの層のうちの少なくとも1つが、シラン、ジクロロシラン、又はトリクロロシランのうちの1つを含む環境において堆積させられ、前記シラン、ジクロロシラン、又はトリクロロシランのうちの1つが、H2流において連行されている、請求項19記載のデバイス。
- エピタキシャルに堆積された少なくとも2つの層が、エピタキシリアクタ環境において堆積させられる、請求項19記載のデバイス。
- 少なくとも2つの向き合った面の間のギャップが、デバイス上に配置された少なくとも1つのマイクロメカニカルエレメントのための所望のギャップ幅を規定している、請求項19記載のデバイス。
- エピタキシャルに堆積された少なくとも2つの層が、一回のプロセス作業において堆積される、請求項19記載のデバイス。
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US10/334,463 US6808953B2 (en) | 2002-12-31 | 2002-12-31 | Gap tuning for surface micromachined structures in an epitaxial reactor |
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JP2012054950A Expired - Lifetime JP5362060B2 (ja) | 2002-12-31 | 2012-03-12 | エピタキシャルリアクタにおける表面マイクロマシニングされた構造のためのギャップチューニング |
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US20050014374A1 (en) | 2005-01-20 |
EP1435336A2 (en) | 2004-07-07 |
US6808953B2 (en) | 2004-10-26 |
JP2012106340A (ja) | 2012-06-07 |
US7507669B2 (en) | 2009-03-24 |
EP1435336A3 (en) | 2005-12-28 |
US20040124483A1 (en) | 2004-07-01 |
JP5038581B2 (ja) | 2012-10-03 |
JP5362060B2 (ja) | 2013-12-11 |
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