JP6901070B2 - Tftバックプレーンの製造方法及びtftバックプレーン - Google Patents
Tftバックプレーンの製造方法及びtftバックプレーン Download PDFInfo
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 12
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- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 2
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Description
び前記窒化物層によって被覆されていない前記酸化物層上に、第2絶縁層を堆積させるステップと;前記第2ゲート電極上方の前記第2絶縁層上に、前記第1活性領域と材質が異なる酸化物の第2活性領域を形成するステップと;前記第2活性領域上及び当該第2活性領域によって被覆されていない前記第2絶縁層上にエッチング阻止層を形成するステップと;前記第1活性領域及び前記第2活性領域用に、第1ソース電極、第1ドレイン電極、第2ソース電極、及び第2ドレイン電極をそれぞれ形成するステップと、を含む。
Claims (16)
- 基板を準備するステップと、
多結晶シリコン材質である第1活性領域を前記基板上に形成するステップと、
前記第1活性領域上、及び前記第1活性領域によって被覆されていない前記基板上に、酸化物層と窒化物層を順次堆積させ、第1絶縁層として形成するステップと、
相互に独立した、前記第1活性領域の上方に位置する第1ゲート電極と、第2ゲート電極とを前記窒化物層上にそれぞれ形成するステップと、
前記第1ゲート電極及び前記第2ゲート電極を自己整合とし、前記第1ゲート電極及び前記第2ゲート電極によって被覆されていない前記窒化物層をドライエッチング法で除去するステップと、
前記第1ゲート電極上、前記第2ゲート電極上、及び前記窒化物層によって被覆されていない前記酸化物層上に、第2絶縁層を堆積させるステップと、
前記第2ゲート電極上方の前記第2絶縁層上に、前記第1活性領域と材質が異なる酸化物の第2活性領域を形成するステップと、
前記第2活性領域上及び当該第2活性領域によって被覆されていない前記第2絶縁層上にエッチング阻止層を形成するステップと、
前記第1活性領域及び前記第2活性領域用に、第1ソース電極、第1ドレイン電極、第2ソース電極、及び第2ドレイン電極をそれぞれ形成するステップと、を含むことを特徴とするTFTバックプレーンの製造方法。 - 前記基板を準備するステップの後、前記第1活性領域を前記基板上に形成するステップの前に、バッファ層を形成するステップをさらに含み、前記バッファ層は窒化シリコン層及び/又は酸化シリコン層を含むことを特徴とする請求項1に記載のTFTバックプレーンの製造方法。
- 前記窒化物層はSiNであることを特徴とする請求項1に記載のTFTバックプレーンの製造方法。
- 前記第1活性領域及び前記第2活性領域用に、第1ソース電極、第1ドレイン電極、第2ソース電極、及び第2ドレイン電極をそれぞれ形成するステップでは、
前記第1活性領域の上方において、前記エッチング阻止層及び前記第2絶縁層を貫通して第1電極孔及び第2電極孔を形成し、前記第1活性領域の両端とそれぞれ接触するように、前記エッチング阻止層上と前記第2絶縁層上、及び前記第1電極孔内と前記第2電極孔内に、前記第1ソース電極及び前記第1ドレイン電極を形成し、
前記第2活性領域の上方において、前記エッチング阻止層を貫通して第3電極孔及び第4電極孔を形成し、前記第2活性領域の両端とそれぞれ接触するように、前記エッチング阻止層上及び前記第3電極孔内と前記第4電極孔内に、前記第2ソース電極及び前記第2ドレイン電極を形成することを特徴とする請求項1に記載のTFTバックプレーンの製造方法。 - 基板を準備するステップと、
多結晶シリコン材質である第1活性領域を前記基板上に形成するステップと、
前記第1活性領域上、及び前記第1活性領域によって被覆されていない前記基板上に、酸化物層と窒化物層を順次堆積させ、第1絶縁層として形成するステップと、
相互に独立した、前記第1活性領域の上方に位置する第1ゲート電極と、第2ゲート電極とを前記窒化物層上にそれぞれ形成するステップと、
前記第1ゲート電極及び前記第2ゲート電極によって被覆されていない前記窒化物層を除去するステップと、
前記第1ゲート電極上、前記第2ゲート電極上、及び前記窒化物層によって被覆されていない前記酸化物層上に第2絶縁層を堆積させるステップと、
前記第2ゲート電極上方の前記第2絶縁層上に、前記第1活性領域と材質が異なる第2活性領域を形成するステップと、
前記第2活性領域上及び当該第2活性領域によって被覆されていない前記第2絶縁層上にエッチング阻止層を形成するステップと、
前記第1活性領域及び前記第2活性領域用に、第1ソース電極、第1ドレイン電極、第2ソース電極、及び第2ドレイン電極をそれぞれ形成するステップと、を含むことを特徴とするTFTバックプレーンの製造方法。 - 前記第1ゲート電極及び前記第2ゲート電極によって被覆されていない前記窒化物層を除去するステップは、前記第1ゲート電極及び前記第2ゲート電極を自己整合とし、前記第1ゲート電極及び前記第2ゲート電極によって被覆されていない前記窒化物層をドライエッチング法で除去する工程を含むことを特徴とする請求項5に記載のTFTバックプレーンの製造方法。
- 前記第2活性領域は酸化物材質であることを特徴とする請求項5に記載のTFTバックプレーンの製造方法。
- 前記基板を準備するステップの後、前記第1活性領域を前記基板上に形成するステップの前に、バッファ層を形成するステップをさらに含み、前記バッファ層は窒化シリコン層及び/又は酸化シリコン層を含むことを特徴とする請求項5に記載のTFTバックプレーンの製造方法。
- 前記窒化物層はSiNであることを特徴とする請求項5に記載のTFTバックプレーンの製造方法。
- 前記第1活性領域及び前記第2活性領域用に、第1ソース電極、第1ドレイン電極、第2ソース電極、及び第2ドレイン電極をそれぞれ形成するステップでは、
前記第1活性領域の上方において、前記エッチング阻止層及び前記第2絶縁層を貫通して第1電極孔及び第2電極孔を形成し、前記第1活性領域の両端とそれぞれ接触するように、前記エッチング阻止層上と前記第2絶縁層上、及び前記第1電極孔内と前記第2電極孔内に、前記第1ソース電極及び前記第1ドレイン電極を形成し、
前記第2活性領域の上方において、前記エッチング阻止層を貫通して第3電極孔及び第4電極孔を形成し、前記第2活性領域の両端とそれぞれ接触するように、前記エッチング阻止層上及び前記第3電極孔内と前記第4電極孔内に、前記第2ソース電極及び前記第2ドレイン電極を形成することを特徴とする請求項5に記載のTFTバックプレーンの製造方法。 - 基板と、
前記基板上に設けられ、多結晶シリコン材質である第1活性領域と、
前記第1活性領域上、及び前記第1活性領域によって被覆されていない前記基板上に設けられ、順次堆積された酸化物層と窒化物層とを含み、且つ前記窒化物層は互いに独立した第1窒化物層及び第2窒化物層を含む第1絶縁層と、
前記第1窒化物層及び前記第2窒化物層上にそれぞれ設けられた第1ゲート電極及び第2ゲート電極で、前記第1ゲート電極及び前記第2ゲート電極と前記酸化物層との間でのみ前記窒化物層が存在する第1ゲート電極及び第2ゲート電極と、
前記第1ゲート電極上、前記第2ゲート電極上、及び前記窒化物層によって被覆されていない前記酸化物層上に設けられた第2絶縁層と、
前記第2ゲート電極上方の前記第2絶縁層上に設けられ、前記第1活性領域と材質が異なる第2活性領域と、
前記第2活性領域上及び当該第2活性領域によって被覆されていない前記第2絶縁層上に形成されるエッチング阻止層と、
前記第1活性領域の両端とそれぞれ接触する第1ソース電極及び第1ドレイン電極と、
前記第2活性領域の両端とそれぞれ接触する第2ソース電極及び第2ドレイン電極と、
を含むことを特徴とするTFTバックプレーン。 - 前記第2活性領域は酸化物材質であることを特徴とする請求項11に記載のTFTバックプレーン。
- 前記第1窒化物層及び前記第2窒化物層は、前記第1ゲート電極及び前記第2ゲート電極を自己整合とし、前記第1ゲート電極及び前記第2ゲート電極によって被覆されていない前記窒化物層をドライエッチング法で除去することで形成されることを特徴とする請求項11に記載のTFTバックプレーン。
- 前記基板と前記第1活性領域との間に設けられ、窒化シリコン層及び/又は酸化シリコン層を含むバッファ層をさらに含むことを特徴とする請求項11に記載のTFTバックプレーン。
- 前記窒化物層はSiNであることを特徴とする請求項11に記載のTFTバックプレーン。
- 前記第1活性領域の上方において、前記エッチング阻止層及び前記第2絶縁層を貫通して第1電極孔及び第2電極孔が形成され、前記エッチング阻止層上と前記第2絶縁層上、及び前記第1電極孔内と前記第2電極孔内に、前記第1ソース電極及び前記第1ドレイン電極が形成され、
前記第2活性領域の上方において、前記エッチング阻止層を貫通して第3電極孔及び第4電極孔が形成され、前記エッチング阻止層上及び前記第3電極孔内と前記第4電極孔内に、前記第2ソース電極及び前記第2ドレイン電極が形成されることを特徴とする請求項11に記載のTFTバックプレーン。
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