JP2021063990A - 金属ミラーベースのマルチスペクトルフィルタアレイ - Google Patents
金属ミラーベースのマルチスペクトルフィルタアレイ Download PDFInfo
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- JP2021063990A JP2021063990A JP2020208751A JP2020208751A JP2021063990A JP 2021063990 A JP2021063990 A JP 2021063990A JP 2020208751 A JP2020208751 A JP 2020208751A JP 2020208751 A JP2020208751 A JP 2020208751A JP 2021063990 A JP2021063990 A JP 2021063990A
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Spectrometry And Color Measurement (AREA)
- Optical Filters (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
tmax=2*(λmax/(4*nref));
tmin=2*(λmin/(4*nref));
と決定されてもよく、ここで、tmaxは、情報が捕獲される最も高い中心波長のためにミラー構造のセットを分離するスペーサ層の合計の厚さを表し、λmaxは、情報が捕獲される最も高い中心波長を表し、nrefは、スペーサ層の屈折率を表し、tminは、情報が捕獲される最も低い中心波長のためにミラー構造のセットを分離するスペーサ層の合計の厚さを表し、およびλminは、情報が捕獲される最も高い中心波長を表す。
c=2x;
と決定されてもよく、ここで、cは、堆積されたスペーサ層の所与の数xに対して生成されることができるチャネルの最大数を表す。いくつかの実施形態では、スペーサ層の特定の数に対して最大のチャネル数を選択することができる。例えば、4つのスペーサ層の堆積では最大16チャネルが生成されてもよいが、4つのスペーサ層に対して9チャネル、10チャネルなどの別のチャネル数が選択されてもよい。この場合、1つ以上のチャネルは、省略または複製されてもよい。例えば、特定の光センサが、特定の波長に関する情報を捕獲することについての性能不足に関連付けられる場合、特定の波長に関する情報は、情報の精度を向上させるために、複数のチャネルに関連する複数の光センサによって捕獲されるようにされてもよい。
t0=tmin;
t1=(c/2)/((c−1)*2*nref)*(λmax−λmin);
tn=tn−1/2;
n=log2(c);
と決定されてもよく、ここで、tnは、第n番目の層の厚さ(例えば、t0は、第1の層であり、t1は、第2の層である)を表し、cは、チャネルセットのチャネルのチャネル数を表す。いくつかの実施形態では、等距離でないチャネルセットが利用されてもよい。例えば、第1の波長セットと、第1の波長セットと不連続である第2の波長セットとに関する情報を得るために、チャネルの不連続なパターニングが選択されてもよい。この場合、tminおよびtmaxは、やはり決定されるが、異なる中間層のセットが選択されてもよい。いくつかの実施形態では、異なるチャネル数が利用されてもよい。さらに、または代わりに、チャネルのパターニングは、共通の厚さを有する複数のチャネルを用いて利用されてもよく、それにより複数の光センサが共通の波長の光に関する情報を捕獲することを可能にする。
Claims (20)
- 基板に配置されたマルチスペクトルフィルタアレイを含むデバイスであって、
該マルチスペクトルフィルタアレイは、
該基板の上に配置された第1の金属ミラーと、
該第1の金属ミラーの上に配置されたスペーサであって、層のセットを含むスペーサと、
該スペーサの上に配置された第2の金属ミラーと、
を含み、
該第2の金属ミラーは、センサ素子のセットの2つ以上のセンサ素子と整列しているデバイス。 - 前記第1の金属ミラーは、前記センサ素子のセットの上に均一な厚さを有する請求項1に記載のデバイス。
- 前記第2の金属ミラーは、前記センサ素子のセットのすべてと整列している請求項1に記載のデバイス。
- 前記層のセットは、
スペーサ層のセットであって、
該スペーサ層のセットの第1の層は、前記センサ素子のセットと整列している光チャネルのセットの第1のチャネルに対応し、および第1の厚さに関連付けられ、
該スペーサ層のセットの第2の層は、該光チャネルのセットの第2のチャネルに対応し、および該第1の厚さと異なる第2の厚さに関連付けられ、
該第1の層は、該センサ素子のセットのうち第1の数のセンサ素子を覆い、
該第2の層は、該センサ素子のセットのうち第2の数のセンサ素子を覆い、
該第2の数は、該第1の数の半分である、
スペーサ層のセットを含む請求項1に記載のデバイス。 - 前記第1の金属ミラーおよび前記第2の金属ミラーは、
銀(Ag)ベースのミラー、
アルミニウム(Al)ベースのミラー、または
銅(Cu)ベースのミラー
のうちの少なくとも1つを含む請求項1に記載のデバイス。 - 前記スペーサは、
アモルファスシリコンベースの材料
水素化アモルファスシリコン(Si:H)ベースの材料
ゲルマニウム(Ge)ベースの材料
酸化ニオブ(Nb2O5)ベースの材料
酸化チタン(TiO2)ベースの材料
酸化タンタル(Ta2O5)ベースの材料
二酸化シリコン(SiO2)ベースの材料
酸化イットリウム(Y2O3)ベースの材料
酸化ジルコニウム(ZrO2)ベースの材料
酸化アルミニウム(Al2O3)ベースの材料
窒化シリコン(Si3N4)ベースの材料
のうちの少なくとも1つを含む請求項1に記載のデバイス。 - 前記マルチスペクトルフィルタアレイの1つ以上の層は、パルスマグネトロンスパッタリングプロセスを使用して前記基板の上に堆積された堆積層である請求項1に記載のデバイス。
- 前記センサ素子のセットは、
フォトダイオードアレイ、
電荷結合デバイス(CCD)、または
相補型金属酸化膜半導体(CMOS)、
のうちの少なくとも1つを更に含む請求項1に記載のデバイス。 - 前記マルチスペクトルフィルタアレイは、
前記第1の金属ミラーを挟む第1の酸化亜鉛保護層と、
前記第2の金属ミラーを挟む第2の酸化亜鉛保護層と、
を更に含む請求項1に記載のデバイス。 - 前記センサ素子のセットに向けられた光をフィルタにかけるために前記マルチスペクトルフィルタアレイの上に配置された1つ以上のフィルタ層であって、
該1つ以上のフィルタ層は、
帯域外遮蔽層のセット、
反射防止コーティング層のセット、または
高次抑制層のセット、
のうちの少なくとも1つを含む、1つ以上のフィルタ層を更に含む請求項1に記載のデバイス。 - 前記マルチスペクトルフィルタアレイの上に配置されたレンズのセットを更に含み、
該レンズのセットの特定のレンズは、該マルチスペクトルフィルタアレイのチャネルを経由して、前記センサ素子のセットの特定の光センサへ光を向けることに関連付けられている請求項1に記載のデバイス。 - 第1の層に向けられた光の一部を反射するための第1のミラーであり、センサ素子のセットに関連付けられた基板の上に堆積されている第1の層と、
該第1の層の上のみに堆積され、該センサ素子のセットに対応するチャネルのセットに関連付けられ、た第2の層のセットであって、
該チャネルのセットのチャネルは、該センサ素子のセットの特定のセンサ素子に向けられるべき光の特定の波長に対応する特定の厚さに関連付けられている第2の層のセットと、
第3の層に向けられた光の一部を反射するための第2の金属ミラーであり、該第2の層のセットに関連付けられた複数の該センサ素子のセットの上に堆積されている第3の層と、
を含む光フィルタ。 - 前記光フィルタが光源に露光された場合、前記センサ素子のセットに向けられた光のスペクトル範囲は、約380nmから約1100nmの間である請求項12に記載の光フィルタ。
- 前記第1の層は、パルスマグネトロンスパッタリングプロセスを用いて前記基板の上に堆積されている請求項12に記載の光フィルタ。
- 請求項12に記載の光フィルタ。
- 基板に組み込まれた光センサのセットと、
該基板の上に堆積されたマルチスペクトルフィルタアレイと、
を含み、
該マルチスペクトルフィルタアレイは、
第1の銀(Ag)金属ミラーと、
第2の銀(Ag)金属ミラーと、
該第1の銀(Ag)金属ミラーおよび該第2の銀(Ag)金属ミラーの間に配置された複数のスペーサ層と、
を含むシステム。 - 前記光センサのセットは、スーパーアレイの複数の光センサである請求項16に記載のシステム。
- 前記光センサのセットは、光源からの光の一部を受け取ることに関連付けられている請求項16に記載のシステム。
- 前記光センサのセットは、裏面照射型センサアレイである請求項16に記載のシステム。
- 前記複数のスペーサ層は、光源から前記光センサのセットに向かう光の角度シフトを低減させるように選択された材料を含む請求項16に記載のシステム。
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