JP2008241439A - ボロメータ型THz波検出器 - Google Patents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0215—Compact construction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0225—Shape of the cavity itself or of elements contained in or suspended over the cavity
- G01J5/0235—Spacers, e.g. for avoidance of stiction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0225—Shape of the cavity itself or of elements contained in or suspended over the cavity
- G01J5/024—Special manufacturing steps or sacrificial layers or layer structures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0815—Light concentrators, collectors or condensers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/20—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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- Investigating Or Analysing Materials By Optical Means (AREA)
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Abstract
【解決手段】ボロメータ薄膜7を含む温度検出部14(ダイアフラム)が支持部13によって回路基板2から浮いた状態で支持されるマイクロブリッジ構造のボロメータ型THz波検出器1において、温度検出部14の上部にTHz波を効率良く集めるための誘電体材料からなる部材(誘電体カバー11)を追加し、誘電体カバー11の屈折率をn、厚みをt、THz波の波長をλとした場合に、nt>λとなるように設定し、かつ、誘電体カバー11と温度検出部14との間隔をλ/2の整数倍に設定する。これらにより、ボロメータ型赤外線検出器の構造や製造方法を利用してTHz波の吸収率を向上させることが可能となり、高性能のボロメータ型THz波検出器を高い歩留まりで製造することができる。
【選択図】図1
Description
2 回路基板
2a 読出回路
3 反射膜
4 コンタクト
5 第1保護膜
6 第2保護膜
7 ボロメータ薄膜
8 第3保護膜
9 電極配線
10 第4保護膜
11 誘電体カバー
13 支持部
14 温度検出部
15 空洞部
16 吸収膜
17 庇
18 光学膜
19 真空パッケージ
20 窓
21 温度安定器
22、23 犠牲層
30 基板
31 ガラス層
32 金属アンテナ
33 ヒータ膜
34、36 絶縁体
35 感熱抵抗層
37 検知素子
38 脚
Claims (10)
- 基板に形成された読出回路に接続される電極配線を含む支持部により、前記電極配線に接続されるボロメータ薄膜を含む温度検出部が、前記基板から浮いた状態で支持されるマイクロブリッジ構造を有するボロメータ型THz波検出器であって、
前記温度検出部の上部に誘電体部材が配置され、
前記誘電体部材の屈折率と厚みとの積がTHz波の波長よりも大きく、かつ、前記誘電体部材と前記温度検出部との間隔が前記THz波の半波長の整数倍に設定されることを特徴とするボロメータ型THz波検出器。 - 前記ボロメータ型THz波検出器は、前記マイクロブリッジ構造の複数の画素が配列された2次元アレイ検出器であり、
前記誘電体部材は、前記複数の画素の上部を覆い、かつ、前記複数の画素の周囲の少なくとも一部で前記基板に固定されることを特徴とする請求項1記載のボロメータ型THz波検出器。 - 前記誘電体部材は、前記複数の画素の周囲の全てで前記基板に密着しており、前記誘電体部材の内部が真空又は減圧状態となっていることを特徴とする請求項2記載のボロメータ型THz波検出器。
- 前記基板上の前記温度検出部に対向する位置にTHz波を反射する反射膜が形成され、前記温度検出部上に前記THz波を吸収する吸収膜が形成され、前記反射膜と前記温度検出部とで光学的共振構造が形成され、
前記反射膜と前記温度検出部との間隔は赤外線の波長を基準にして設定され、かつ、前記温度検出部のシート抵抗は前記THz波を基準にして設定されることを特徴とする請求項1乃至3のいずれか一に記載のボロメータ型THz波検出器。 - 前記基板上の前記温度検出部に対向する位置にTHz波を反射する反射膜が形成され、前記温度検出部上に前記THz波を吸収する吸収膜が形成され、前記反射膜と前記温度検出部との間に前記THz波を透過する光学膜が配置され、前記反射膜と前記温度検出部とで光学的共振構造が形成され、
前記反射膜と前記温度検出部との間隔は赤外線の波長を基準にして設定され、かつ、前記温度検出部のシート抵抗は前記THz波を基準にして設定されることを特徴とする請求項1乃至3のいずれか一に記載のボロメータ型THz波検出器。 - 前記光学膜は、シリコン酸化膜、シリコン窒化膜、シリコン酸窒化膜、シリコン膜のいずれかであることを特徴とする請求項5記載のボロメータ型THz波検出器。
- 更に、前記温度検出部上に、該温度検出部の周縁部から外側に延びる庇が形成され、前記吸収膜が、前記温度検出部上及び前記庇上に形成されることを特徴とする請求項4乃至6のいずれか一に記載のボロメータ型THz波検出器。
- 前記反射膜と前記温度検出部との間隔は、略1.5乃至2.5μmの範囲に設定され、
前記温度検出部のシート抵抗は、前記反射膜と前記温度検出部との間の光路長における、前記温度検出部のシート抵抗と前記THz波の吸収率との相関関係に基づいて、前記THz波の吸収率がピーク近傍となる範囲に設定されることを特徴とする請求項4乃至7のいずれか一に記載のボロメータ型THz波検出器。 - 前記温度検出部のシート抵抗は、前記THz波の吸収率が略10%以上となる範囲に設定されることを特徴とする請求項8記載のボロメータ型THz波検出器。
- 前記温度検出部のシート抵抗は、略10乃至100Ω/squareの範囲に設定されることを特徴とする請求項8又は9に記載のボロメータ型THz波検出器。
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JP2007081828A JP5109169B2 (ja) | 2007-03-27 | 2007-03-27 | ボロメータ型THz波検出器 |
US12/056,631 US7557349B2 (en) | 2007-03-27 | 2008-03-27 | Bolometer-type THz-wave detector |
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Cited By (8)
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JP2010261935A (ja) * | 2009-04-30 | 2010-11-18 | Commissariat A L'energie Atomique & Aux Energies Alternatives | 赤外からテラヘルツ周波数帯域の電磁放射を検出するボロメータ検出器、およびかかる検出器を備えたアレイ検出装置 |
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JP2013152213A (ja) * | 2011-12-09 | 2013-08-08 | Commissariat A L'energie Atomique & Aux Energies Alternatives | テラヘルツ領域の電磁放射線のボロメータ検出器および同検出器を含む検出器アレイデバイス |
JP2013253896A (ja) * | 2012-06-08 | 2013-12-19 | Seiko Epson Corp | 光検出素子、カメラおよび電子機器 |
JP2014001941A (ja) * | 2012-06-15 | 2014-01-09 | Seiko Epson Corp | 検出素子、検出モジュール、撮像デバイス、検出撮像モジュール、電子機器、テラヘルツカメラ、検出素子の製造方法 |
JP2014119461A (ja) * | 2012-12-17 | 2014-06-30 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | 赤外線検出デバイスを作るための方法 |
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