KR20080029862A - Hbar 발진기 및 그 제조 방법 - Google Patents
Hbar 발진기 및 그 제조 방법 Download PDFInfo
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- KR20080029862A KR20080029862A KR1020070097572A KR20070097572A KR20080029862A KR 20080029862 A KR20080029862 A KR 20080029862A KR 1020070097572 A KR1020070097572 A KR 1020070097572A KR 20070097572 A KR20070097572 A KR 20070097572A KR 20080029862 A KR20080029862 A KR 20080029862A
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- 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
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- 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
- H03H3/04—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 for obtaining desired frequency or temperature coefficient
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02007—Details of bulk acoustic wave devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02047—Treatment of substrates
- H03H9/02055—Treatment of substrates of the surface including the back surface
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
- H03H9/105—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a cover cap mounted on an element forming part of the BAW device
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- 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
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/58—Multiple crystal filters
- H03H9/60—Electric coupling means therefor
- H03H9/605—Electric coupling means therefor consisting of a ladder configuration
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- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
Claims (20)
- 발진기를 제조하는 방법으로서,기판을 제공하는 단계와,상기 기판의 일부분을 포함하는 HBAR(high tone bulk acoustic resonator)를 제조하는 단계와,상기 기판 위에 FBAR(film bulk acoustic resonator) 필터를 제조하는 단계와,원하는 기판 두께를 제공하기 위해 상기 기판의 일부분을 제거하는 단계를 포함하는 발진기 제조 방법.
- 제 1 항에 있어서,상기 제거 단계는상기 기판을 제 1 두께로 연마(grinding)하는 단계와,상기 기판을 원하는 두께로 폴리싱(polishing)하는 단계를 더 포함하는발진기 제조 방법.
- 제 1 항에 있어서,상기 HBAR의 제조 단계는 상기 HBAR의 활성 영역 위에 돌출형 프레임 구조물을 형성하는 단계를 더 포함하는발진기 제조 방법.
- 제 1 항에 있어서,상기 HBAR의 제조 단계는 상기 HBAR의 활성 영역 위에 오목형 프레임 구조물을 형성하는 단계를 더 포함하는발진기 제조 방법.
- 제 1 항에 있어서,상기 FBAR 필터의 제조 단계는상기 기판 내에 복수의 캐비티(cavities)를 제조하는 단계와,각각의 상기 캐비티 위에 FBAR 구조물을 제조하는 단계를 더 포함하는발진기 제조 방법.
- 제 1 항에 있어서,상기 FBAR 필터의 제조 단계는상기 기판 내에 복수의 음향 차단기(acoustic isolators)를 제조하는 단계와,각각의 상기 음향 차단기 위에 FBAR 구조물을 제조하는 단계를 더 포함하는발진기 제조 방법.
- 제 6 항에 있어서,상기 음향 차단기는 브래그 미러(Bragg mirrors)인발진기 제조 방법.
- 제 1 항에 있어서,상기 HBAR의 압전층 위에 온도 보정 소자를 제공하는 단계를 더 포함하는발진기 제조 방법.
- 제 1 항에 있어서,상기 HBAR 및 상기 FBAR 필터 위에 마이크로캡 구조물(microcap structure)을 형성하는 단계를 더 포함하고,상기 마이크로캡 구조물은 상기 HBAR 및 상기 FBAR 필터에 기밀성(hermeticity)을 제공하는발진기 제조 방법.
- 제 1 항에 있어서,상기 기판의 하부 및 적어도 상기 HBAR의 하부 영역 내에 보호 구조물을 제공하는 단계를 더 포함하는발진기 제조 방법.
- 제 10 항에 있어서,상기 보호 구조물과 상기 기판 사이에 공극(air gap)을 형성하는 단계를 더 포함하는발진기 제조 방법.
- 제 1 항에 있어서,상기 기판은 실리콘이고,상기 원하는 두께는 대략 10.0㎛ 내지 대략 50.0㎛의 범위를 갖는발진기 제조 방법.
- 기판과,상기 기판의 일부분을 포함하는 HBAR(high tone bulk acoustic resonator)과,상기 기판 위에 배치되고, 복수의 FBAR 장치를 포함하는 FBAR(film bulk acoustic resonator) 필터와,상기 기판 내에 배치된 복수의 음향 차단기를 포함하고,상기 차단기 중 하나는 각각의 상기 FBAR 장치 아래에 배치되는발진기.
- 제 13 항에 있어서,상기 HBAR의 상부 전극 위에 배치된 프레임 구조물을 더 포함하고,상기 프레임 구조물은 상기 HBAR 내의 의사 모드(spurious modes)를 억제할 수 있는발진기.
- 제 13 항에 있어서,상기 기판은 원하는 고조파 모드 주파수 간격을 제공하도록 선택된 두께를 갖는발진기.
- 제 14 항에 있어서,상기 필터는 복수의 고조파 모드(harmonic modes) 중 선택된 것을 통과시키는발진기.
- 제 13 항에 있어서,상기 HBAR와 상기 FBAR 필터 위의 마이크로캡 구조물을 더 포함하고,상기 마이크로캡 구조물은 상기 HBAR 및 상기 FBAR 필터에 기밀성을 제공하 는발진기.
- 제 13 항에 있어서,상기 HBAR은 온도 보정 소자를 더 포함하는발진기.
- 제 13 항에 있어서,상기 기판의 하부 및 적어도 상기 HBAR의 하부 영역 내에 배치된 보호 구조물을 더 포함하는발진기.
- 제 14 항에 있어서,상기 프레임 구조물은 돌출형 프레임 구조물 또는 오목형 프레임 구조물인발진기.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/540,413 US7508286B2 (en) | 2006-09-28 | 2006-09-28 | HBAR oscillator and method of manufacture |
US11/540,413 | 2006-09-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20080029862A true KR20080029862A (ko) | 2008-04-03 |
KR100880791B1 KR100880791B1 (ko) | 2009-02-02 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020070097572A KR100880791B1 (ko) | 2006-09-28 | 2007-09-27 | Hbar 발진기 및 그 제조 방법 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7508286B2 (ko) |
KR (1) | KR100880791B1 (ko) |
GB (1) | GB2442352B (ko) |
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KR100880791B1 (ko) | 2009-02-02 |
GB0719023D0 (en) | 2007-11-07 |
US7508286B2 (en) | 2009-03-24 |
GB2442352A (en) | 2008-04-02 |
GB2442352B (en) | 2011-08-31 |
US20080079516A1 (en) | 2008-04-03 |
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