KR20040093238A - 캔틸레버 형태의 압전 박막 공진 소자 및 그 제조방법 - Google Patents
캔틸레버 형태의 압전 박막 공진 소자 및 그 제조방법 Download PDFInfo
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- KR20040093238A KR20040093238A KR1020030025481A KR20030025481A KR20040093238A KR 20040093238 A KR20040093238 A KR 20040093238A KR 1020030025481 A KR1020030025481 A KR 1020030025481A KR 20030025481 A KR20030025481 A KR 20030025481A KR 20040093238 A KR20040093238 A KR 20040093238A
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Classifications
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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
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/171—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator implemented with thin-film techniques, i.e. of the film bulk acoustic resonator [FBAR] type
- H03H9/172—Means for mounting on a substrate, i.e. means constituting the material interface confining the waves to a volume
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H2003/022—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks the resonators or networks being of the cantilever type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/42—Piezoelectric device making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49005—Acoustic transducer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49126—Assembling bases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49128—Assembling formed circuit to base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
- Y10T29/49156—Manufacturing circuit on or in base with selective destruction of conductive paths
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
Claims (15)
- 압전 박막 공진 소자의 제조 방법에 있어서,(a)기판상에 절연층을 증착하는 단계;(b)상기 절연층 상에 희생층을 증착하고 패터닝하는 단계;(c)상기 희생층 및 절연층상에 하부전극을 증착하고 패터닝하는 단계;(d)상기 하부전극상에 압전층을 증착하고 패터닝하는 단계;(e)상기 압전층 상에 상부전극을 증착하고 패터닝하는 단계;및(f)상기 희생층을 식각하는 단계;를포함하는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 제1항에 있어서,상기 상부전극 상에 절연층을 증착하는 단계;를더 포함하는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 제2항에 있어서,상기 절연층을 식각하여 주파수 튜닝을 하는 단계;를더 포함하는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 압전 박막 공진 소자의 제조 방법에 있어서,(ⅰ)기판을 식각하여 공동부를 형성하는 단계;(ⅱ)상기 공동부가 형성된 기판상에 절연층을 증착하는 단계;(ⅲ)상기 공동부 및 절연층 상에 희생층을 증착하는 단계;(ⅳ)상기 희생층을 평탄화하여 절연층의 일부를 노출시키는 단계;(ⅴ)상기 평탄화된 희생층 및 상기 노출된 절연층 상에 하부전극을 증착시키고 패터닝하는 단계;(ⅵ)상기 하부전극상에 압전층을 증착시키고 패터닝하는 단계;(ⅶ)상기 압전층상에 상부전극을 증착시키고 패터닝하는 단계;및(ⅷ)상기 희생층을 제거하는 단계;를포함하는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 제4항에 있어서,상기 (ⅳ)단계는 CMP공정을 이용하여 평탄화하는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 제4항에 있어서,상기 상부전극 상에 절연층을 증착하는 단계;를더 포함하는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 제6항에 있어서,상기 절연층을 식각하여 주파수튜닝을 하는 단계;를더 포함하는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 절연층이 증착된 기판;상기 절연층 상에 지지부 및 돌출부로 구성된 캔틸레버형태로 제조된 하부전극;상기 하부전극상에 증착된 압전층;및상기 압전층 상에 증착된 상부전극;을포함하는 것을 특징으로 하는 압전 박막 공진 소자.
- 제8항에 있어서,상기 상부전극 상에 증착된 절연층;을더 포함하는 것을 특징으로 하는 압전 박막 공진 소자.
- 상부표면의 일정부분에 공동부가 형성된 기판;상기 공동부가 형성된 기판상에 증착된 절연층;상기 공동부가 형성되지 않은 기판상의 절연층 중 일단과 접하면서 상기 공동부의 상층공간까지 돌출된 형태의 하부전극;상기 하부전극상에 증착된 압전층;및상기 압전층 상에 증착된 상부전극;을포함하는 것을 특징으로 하는 압전 박막 공진 소자.
- 제10항에 있어서,상기 상부전극 상에 증착된 절연층;을더 포함하는 것을 특징으로 하는 압전 박막 공진 소자.
- 제1항에 있어서,상기 (c)단계는 상기 희생층 및 절연층상에 하부전극을 증착하고, 지지부를 이루는 하부전극을 일부 제거하여, 상기 지지부를 이루는 하부전극의 폭이 돌출부를 이루는 하부전극의 폭보다 작은 형태로 형성하는 단계;상기 (e)단계는 상기 압전층 상에 상부전극을 증착하고, 상기 지지부를 이루는 하부전극이 일부 제거된 절연층 상에서 제거되지 않은 하부전극과 일정거리 이격되도록 패터닝하는 단계;로이루어지는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 제4항에 있어서,상기 (ⅴ)단계는 상기 평탄화된 희생층 및 상기 노출된 절연층 상에 하부전극을 증착하고, 상기 절연층과 접하는 하부전극을 일부 제거하여 그 접하는 하부전극의 폭이 공동부 상층공간까지 돌출된 하부전극의 폭보다 작게 하는 단계;상기 (ⅶ)단계는 상기 압전층상에 상부전극을 증착하고, 상기 상부전극을 상기 하부전극이 일부 제거된 절연층상에서 제거되지 않은 하부전극과 일정거리 이격되게 증착시키는 단계;로이루어지는 것을 특징으로 하는 압전 박막 공진 소자의 제조 방법.
- 제8항에 있어서,상기 하부전극의 지지부는 상기 돌출부보다 그 폭이 작고,상기 상부전극은 상기 지지부측으로 추출되어 상기 하부전극의 지지부와 일정거리 이격된 영역의 절연층 상에 증착되어 패드를 노출시키는 것을 특징으로 하는 압전 박막 공진 소자.
- 제10항에 있어서,상기 하부전극이 상기 절연층과 접하는 부분은 상기 돌출된 부분보다 그 폭이 작고,상기 상부전극은 상기 하부전극이 절연층과 접하는 부분과 일정거리 이격된 영역의 절연층 상에 증착되어 패드를 노출시키는 것을 특징으로 하는 압전 박막 공진 소자.
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KR20030025481A KR100599083B1 (ko) | 2003-04-22 | 2003-04-22 | 캔틸레버 형태의 압전 박막 공진 소자 및 그 제조방법 |
EP20040251968 EP1471637B1 (en) | 2003-04-22 | 2004-04-01 | Method for fabricating cantilevered type film bulk acoustic resonator and film bulk acoustic resonator fabricated by the same |
US10/827,532 US7281304B2 (en) | 2003-04-22 | 2004-04-20 | Method for fabricating a film bulk acoustic resonator |
JP2004127018A JP4071213B2 (ja) | 2003-04-22 | 2004-04-22 | カンチレバー状の圧電薄膜素子およびその製造方法 |
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KR100780842B1 (ko) * | 2006-12-14 | 2007-11-30 | 주식회사 에스세라 | 공진 구조체를 가지는 압전 공진자의 형성방법들 |
KR100918380B1 (ko) * | 2007-12-12 | 2009-09-22 | 한국전자통신연구원 | 전기 발생 소자 어레이와 이를 구비하는 전기 발생 시스템및 그 제조방법 |
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US7281304B2 (en) | 2007-10-16 |
EP1471637A2 (en) | 2004-10-27 |
KR100599083B1 (ko) | 2006-07-12 |
US20050034822A1 (en) | 2005-02-17 |
JP2004328745A (ja) | 2004-11-18 |
EP1471637B1 (en) | 2011-03-23 |
EP1471637A3 (en) | 2007-03-28 |
JP4071213B2 (ja) | 2008-04-02 |
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