JP7479850B2 - イメージセンサー - Google Patents
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- JP7479850B2 JP7479850B2 JP2020001233A JP2020001233A JP7479850B2 JP 7479850 B2 JP7479850 B2 JP 7479850B2 JP 2020001233 A JP2020001233 A JP 2020001233A JP 2020001233 A JP2020001233 A JP 2020001233A JP 7479850 B2 JP7479850 B2 JP 7479850B2
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- 239000010410 layer Substances 0.000 claims description 212
- 239000004065 semiconductor Substances 0.000 claims description 201
- 238000002955 isolation Methods 0.000 claims description 59
- 238000006243 chemical reaction Methods 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 16
- 239000007769 metal material Substances 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims 1
- 239000011229 interlayer Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 16
- 238000009792 diffusion process Methods 0.000 description 15
- 230000001681 protective effect Effects 0.000 description 14
- 230000003667 anti-reflective effect Effects 0.000 description 13
- 229910052581 Si3N4 Inorganic materials 0.000 description 11
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 229910052814 silicon oxide Inorganic materials 0.000 description 10
- 229910052721 tungsten Inorganic materials 0.000 description 10
- 239000010937 tungsten Substances 0.000 description 10
- 238000005530 etching Methods 0.000 description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 239000004020 conductor Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 230000002596 correlated effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910017090 AlO 2 Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000004380 ashing Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 229910000449 hafnium oxide Inorganic materials 0.000 description 2
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 150000004770 chalcogenides Chemical class 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- -1 tungsten nitride Chemical class 0.000 description 1
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- H01L27/144—Devices controlled by radiation
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- H01L27/144—Devices controlled by radiation
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- H01L27/14627—Microlenses
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- H01L27/144—Devices controlled by radiation
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- H01L27/14636—Interconnect structures
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- H01L27/144—Devices controlled by radiation
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- H01L27/14641—Electronic components shared by two or more pixel-elements, e.g. one amplifier shared by two pixel elements
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- H01L27/144—Devices controlled by radiation
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- H01L27/14643—Photodiode arrays; MOS imagers
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- H01L27/144—Devices controlled by radiation
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- H01L27/14683—Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
- H01L27/14685—Process for coatings or optical elements
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- H—ELECTRICITY
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- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/14609—Pixel-elements with integrated switching, control, storage or amplification elements
- H01L27/14612—Pixel-elements with integrated switching, control, storage or amplification elements involving a transistor
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Description
20 行デコーダー
30 行ドライバー
40 列デコーダー
50 タイミング発生器
60 相関二重サンプラー(CDS)
70 アナログデジタルコンバーター(ADC)
80 入出力バッファ
100 半導体層
200 配線構造体
201、201a 層間絶縁膜
203 第1 配線
205 第2配線
207 ビア
209 配線絶縁膜
210 連結配線
211 第1連結ビア
213 第2連結ビア
300 反射防止膜
400 グリッドパターン
401 第1(グリッド)パターン
403 第2(グリッド)パターン
410 遮光パターン
410a 上面
410A 遮光構造体
411 側面
510 貫通ビア
520 パッド
521 連結パターン
530 カラーフィルター
540 カラーフィルター膜
601 遮光膜
603 第1マスクパターン
605 フィルム膜
607 低屈折膜
609 第2マスクパターン
701 貫通電極
703 貫通絶縁パターン
705 埋め込み絶縁パターン
709 絶縁膜
710 コンタクトプラグ構造体
711 スペーサー
713 コンタクトプラグ
720 下部電極
730 上部電極
740 キャッピング層
DTI1、DTI2 第1素子分離膜
FD1、FD2 (第1、第2)浮遊拡散領域
MR マイクロレンズ
P1、P2、P3、P4 (第1、第2、第3、第4)部分
PD 光電変換素子
PD1、PD2 (第1、第2)光電変換素子
SL 保護分離膜
TES 貫通電極構造体
TG トランスファーゲート
TH1、TH2 (第1、第2)トレンチ
TVR 貫通ビア領域
UP 外側セグメント
VH ビアホール
Claims (11)
- 第1領域及び第2領域を含み、互いに対向する第1面及び第2面を有する半導体層と、
前記半導体層の前記第1領域及び前記第2領域内に配置されて、前記第1領域及び前記第2領域内に提供された複数のピクセルを定義する素子分離膜と、
前記半導体層の前記第1領域の前記第1面上に、前記素子分離膜と重畳するように配置された第1グリッドパターンと、
前記半導体層の前記第2領域の前記第1面上に配置された遮光パターンと、を含み、
前記第1グリッドパターンの上面は第1レベルに位置し、前記遮光パターンの上面は第2レベルに位置し、前記第1レベルは前記第2レベルよりも低く、前記第1レベル及び前記第2レベルは前記半導体層の前記第1面に対して定義され、
前記第1グリッドパターンの厚さは、前記遮光パターンの厚さよりも薄く、
前記第1グリッドパターン上の第2グリッドパターンをさらに含み、
前記第1グリッドパターンは、金属及び金属窒化膜の中の少なくとも1つを含み、
前記第2グリッドパターンは、低屈折物質を含み、
前記遮光パターンは、金属物質を含む単一層からなり、
前記半導体層は、第3領域をさらに含み、
前記半導体層の前記第3領域上のパッドをさらに含み、
前記第1グリッドパターンは、前記遮光パターンを通じて前記パッドに連結されることを特徴とするイメージセンサー。 - 前記第1グリッドパターンは、前記第2領域上に延長されて前記遮光パターンの側面を覆い、前記遮光パターンの上面を露出させることを特徴とする請求項1に記載のイメージセンサー。
- 前記第1グリッドパターンは、前記第2領域上に延長されて前記遮光パターンの側面及び上面を覆うことを特徴とする請求項1に記載のイメージセンサー。
- 前記第1グリッドパターンの側面と前記第2グリッドパターンの側面とが整列されたことを特徴とする請求項1に記載のイメージセンサー。
- 前記複数のピクセルは、前記半導体層の前記第1領域内に提供された第1ピクセル及び前記半導体層の前記第2領域内に提供された第2ピクセルを含み、
前記イメージセンサーは、
前記第1ピクセル内の第1光電変換素子と、
前記第2ピクセル内の第2光電変換素子と、をさらに含み、
前記第1グリッドパターンは、前記第1光電変換素子を露出させ、
前記遮光パターンは、前記第2光電変換素子を覆うことを特徴とする請求項1に記載のイメージセンサー。 - 前記複数のピクセルは、前記半導体層の前記第1領域内に提供された第1ピクセル及び前記半導体層の前記第2領域内に提供された第2ピクセルを含み、
前記イメージセンサーは、
前記第1ピクセル内の一対の第1光電変換素子と、
前記第2ピクセル内の一対の第2光電変換素子と、
前記半導体層の前記第1面上に配置され、前記一対の第1光電変換素子を覆うマイクロレンズと、をさらに含むことを特徴とする請求項1に記載のイメージセンサー。 - 前記素子分離膜は、前記半導体層を貫通して前記半導体層の前記第1面及び前記第2面に接触することを特徴とする請求項1に記載のイメージセンサー。
- 前記素子分離膜は、前記半導体層の前記第1面に接触し、前記半導体層の前記第2面から離隔されたことを特徴とする請求項1に記載のイメージセンサー。
- 前記第1グリッドパターンの物質は、前記遮光パターンの物質とは異なることを特徴とする請求項1に記載のイメージセンサー。
- 前記複数のピクセルは、前記半導体層の前記第1領域内の第1ピクセル及び前記半導体層の前記第2領域内の第2ピクセルを含み、
前記イメージセンサーは、
前記第1ピクセル上のカラーフィルターと、
前記第2領域上のカラーフィルター膜と、
前記カラーフィルター上のマイクロレンズと、を含み、
前記マイクロレンズは、前記カラーフィルター膜を露出させることを特徴とする請求項1に記載のイメージセンサー。 - 第1領域及び第2領域を含む半導体層と、
前記半導体層の前記第1領域及び前記第2領域内に配置されて、前記第1領域及び前記第2領域内に提供された複数のピクセルを定義する素子分離膜と、
前記半導体層の前記第1領域上に、前記素子分離膜と重畳するように配置されたグリッドパターンと、
前記半導体層の前記第2領域上の遮光構造体と、を含み、
前記グリッドパターンは、
前記半導体層上に配置されて前記遮光構造体の側面を覆う第1グリッドパターンと、
前記第1グリッドパターンを覆う第2グリッドパターンと、を含み、
前記第1グリッドパターンは、前記遮光構造体の側面と前記第2グリッドパターンとの間に挟まれ、
前記第1グリッドパターンの厚さは、前記遮光構造体の厚さよりも薄く、
前記遮光構造体は、前記半導体層の前記第2領域上に積層された遮光パターン、導電パターン、及び有機パターンを含み、
前記第1グリッドパターンは、前記導電パターンに連結され、
前記第2グリッドパターンは、前記有機パターンに連結され、
前記半導体層は、第3領域をさらに含み、
前記半導体層の前記第3領域上のパッドをさらに含み、
前記第1グリッドパターンは、前記遮光パターンを通じて前記パッドに連結されることを特徴とするイメージセンサー。
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