JP2020526043A - トップゲート型薄膜トランジスタの製造方法 - Google Patents
トップゲート型薄膜トランジスタの製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 68
- 239000010409 thin film Substances 0.000 title claims abstract description 44
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 128
- 238000000034 method Methods 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 238000005530 etching Methods 0.000 claims abstract description 16
- 239000010410 layer Substances 0.000 claims description 156
- 239000000758 substrate Substances 0.000 claims description 47
- 239000011229 interlayer Substances 0.000 claims description 29
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000000059 patterning Methods 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 5
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052733 gallium Inorganic materials 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 5
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical group [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- 238000004380 ashing Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 abstract 1
- 230000000873 masking effect Effects 0.000 description 2
- OFIYHXOOOISSDN-UHFFFAOYSA-N tellanylidenegallium Chemical compound [Te]=[Ga] OFIYHXOOOISSDN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
Description
基板上に導電性チャネル、ゲート絶縁層及びゲートパターンを形成する前記工程は、
ソース領域、ドレイン領域及びチャネル領域を含む活性層を基板上に形成し、
前記活性層上にゲート絶縁層、ゲート金属層及びフォトレジスト層を順次形成し、
第1フォトレジストパターンが形成されるように、前記フォトレジスト層をパターニング処理し、前記第1フォトレジストパターンは、第1遮蔽部及び前記第1遮蔽部の両側に設けられる第2遮蔽部を含み、前記基板上における前記第1遮蔽部の投影と前記基板上における前記チャネル領域の投影とが重なり、前記第1遮蔽部の厚さが前記第2遮蔽部の厚さよりも大きく、
ゲートパターンが形成されるように、前記第1フォトレジストパターンをマスクとして前記ゲート金属層をエッチングし、
前記第1フォトレジストパターンの第2遮蔽部を除去して第2フォトレジストパターンが形成されるように、前記第1フォトレジストパターンの第2遮蔽部をアッシング処理し、
前記ソース領域及び前記ドレイン領域が露出するように前記第2フォトレジストパターンをマスクとして前記ゲート絶縁層をエッチングし、
前記ソース領域上にソース接触領域が形成され、前記ドレイン領域上にドレイン接触領域が形成されるように、前記活性層を導体化し、前記導電性チャネルは、前記ソース接触領域、ドレイン接触領域及びチャネル領域により形成され、
前記基板上における前記ゲートパターンの投影と前記基板上における前記チャネル領域の投影とが重なることにより、前記第1フォトレジストパターンの前記第2遮蔽部を酸素によりアッシング処理することができる、トップゲート型薄膜トランジスタの製造方法が提供される。
層間絶縁層、ソース及びドレインを形成する工程は、
前記第2フォトレジストパターンを剥離し、
前記ゲートパターン、前記ソース接触領域及び前記ドレイン接触領域上に層間絶縁層と、前記層間絶縁層を貫通させる第1ビアホール及び第2ビアホールと、を形成し、前記ソース接触領域及び前記ドレイン接触領域をそれぞれ前記第1ビアホール及び前記第2ビアホールにより露出させ、
前記層間絶縁層上にそれぞれ前記第1ビアホール及び前記第2ビアホールを通じて前記ソース接触領域及び前記ドレイン接触領域に接触する前記ソース及び前記ドレインを形成する。
基板上に導電性チャネル、ゲート絶縁層及びゲートパターンを形成する前記工程は、
ソース領域、ドレイン領域及びチャネル領域を含む活性層を基板上に形成し、
前記活性層上にゲート絶縁層、ゲート金属層及びフォトレジスト層を順次形成し、
第1フォトレジストパターンが形成されるように、前記フォトレジスト層をパターニング処理し、前記第1フォトレジストパターンは、第1遮蔽部及び前記第1遮蔽部の両側に設けられる第2遮蔽部を含み、前記基板上における前記第1遮蔽部の投影と前記基板上における前記チャネル領域の投影とが重なり、前記第1遮蔽部の厚さが前記第2遮蔽部の厚さよりも大きく、
ゲートパターンが形成されるように、前記第1フォトレジストパターンをマスクとして前記ゲート金属層をエッチングし、
前記第1フォトレジストパターンの第2遮蔽部を除去して第2フォトレジストパターンが形成されるように、前記第1フォトレジストパターンの第2遮蔽部をアッシング処理し、
前記ソース領域及び前記ドレイン領域が露出するように前記第2フォトレジストパターンをマスクとして前記ゲート絶縁層をエッチングし、
前記ソース領域上にソース接触領域が形成され、前記ドレイン領域上にドレイン接触領域が形成されるように、前記活性層を導体化し、前記導電性チャネルは、前記ソース接触領域、ドレイン接触領域及びチャネル領域により形成される、トップゲート型薄膜トランジスタの製造方法が提供される。
層間絶縁層、ソース及びドレインを形成する前記工程は、
前記第2フォトレジストパターンを剥離し、
前記ゲートパターン、前記ソース接触領域及び前記ドレイン接触領域上に層間絶縁層と、前記層間絶縁層を貫通させる第1ビアホール及び第2ビアホールと、を形成し、前記ソース接触領域及び前記ドレイン接触領域をそれぞれ前記第1ビアホール及び前記第2ビアホールにより露出させ、
前記層間絶縁層上にそれぞれ前記第1ビアホール及び前記第2ビアホールを通じて前記ソース接触領域及び前記ドレイン接触領域に接触する前記ソース及び前記ドレインを形成する。
Claims (17)
- 基板上に導電性チャネル、ゲート絶縁層及びゲートパターンを形成する工程を含むトップゲート型薄膜トランジスタの製造方法であって、
基板上に導電性チャネル、ゲート絶縁層及びゲートパターンを形成する前記工程は、
ソース領域、ドレイン領域及びチャネル領域を含む活性層を基板上に形成し、
前記活性層上にゲート絶縁層、ゲート金属層及びフォトレジスト層を順次形成し、
第1フォトレジストパターンが形成されるように、前記フォトレジスト層をパターニング処理し、前記第1フォトレジストパターンは、第1遮蔽部及び前記第1遮蔽部の両側に設けられる第2遮蔽部を含み、前記基板上における前記第1遮蔽部の投影と前記基板上における前記チャネル領域の投影とが重なり、前記第1遮蔽部の厚さが前記第2遮蔽部の厚さよりも大きく、
ゲートパターンが形成されるように、前記第1フォトレジストパターンをマスクとして前記ゲート金属層をエッチングし、
前記第1フォトレジストパターンの第2遮蔽部を除去して第2フォトレジストパターンが形成されるように、前記第1フォトレジストパターンの第2遮蔽部をアッシング処理し、
前記ソース領域及び前記ドレイン領域が露出するように前記第2フォトレジストパターンをマスクとして前記ゲート絶縁層をエッチングし、
前記ソース領域上にソース接触領域が形成され、前記ドレイン領域上にドレイン接触領域が形成されるように、前記活性層を導体化し、前記導電性チャネルは、前記ソース接触領域、ドレイン接触領域及びチャネル領域により形成され、
前記基板上における前記ゲートパターンの投影と前記基板上における前記チャネル領域の投影とが重なることにより、前記第1フォトレジストパターンの前記第2遮蔽部を酸素によりアッシング処理することができる、トップゲート型薄膜トランジスタの製造方法。 - 前記第1フォトレジストパターンが形成されるように、前記フォトレジスト層をパターニング処理する前記工程は、前記第1フォトレジストパターンが形成されるように、前記フォトレジスト層をハーフトーンマスクにより露光させ、露光されたフォトレジスト層を現像液により現像する工程を含む、請求項1に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記活性層の材料は、酸化インジウムガリウム亜鉛又はアモルファスシリコンである、請求項1に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記製造方法は、層間絶縁層、ソース及びドレインを形成する工程をさらに含み、
層間絶縁層、ソース及びドレインを形成する工程は、
前記第2フォトレジストパターンを剥離し、
前記ゲートパターン、前記ソース接触領域及び前記ドレイン接触領域上に層間絶縁層と、前記層間絶縁層を貫通させる第1ビアホール及び第2ビアホールと、を形成し、前記ソース接触領域及び前記ドレイン接触領域をそれぞれ前記第1ビアホール及び前記第2ビアホールにより露出させ、
前記層間絶縁層上にそれぞれ前記第1ビアホール及び前記第2ビアホールを通じて前記ソース接触領域及び前記ドレイン接触領域に接触する前記ソース及び前記ドレインを形成する、請求項1に記載のトップゲート型薄膜トランジスタの製造方法。 - 前記第2フォトレジストパターンを剥離する工程は、
前記第2フォトレジストパターンを剥離液に浸漬する、請求項4に記載のトップゲート型薄膜トランジスタの製造方法。 - 前記ゲート絶縁層の材料は、それぞれ酸化シリコン及び窒化シリコンのうちの一つ以上を含む、請求項1に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記活性層をプラズマガスにより導体化することができる、請求項1に記載のトップゲート型薄膜トランジスタの製造方法。
- 基板上に導電性チャネル、ゲート絶縁層及びゲートパターンを形成する工程を含むトップゲート型薄膜トランジスタの製造方法であって、
基板上に導電性チャネル、ゲート絶縁層及びゲートパターンを形成する前記工程は、
ソース領域、ドレイン領域及びチャネル領域を含む活性層を基板上に形成し、
前記活性層上にゲート絶縁層、ゲート金属層及びフォトレジスト層を順次形成し、
第1フォトレジストパターンが形成されるように、前記フォトレジスト層をパターニング処理し、前記第1フォトレジストパターンは、第1遮蔽部及び前記第1遮蔽部の両側に設けられる第2遮蔽部を含み、前記基板上における前記第1遮蔽部の投影と前記基板上における前記チャネル領域の投影とが重なり、前記第1遮蔽部の厚さが前記第2遮蔽部の厚さよりも大きく、
ゲートパターンが形成されるように、前記第1フォトレジストパターンをマスクとして前記ゲート金属層をエッチングし、
前記第1フォトレジストパターンの第2遮蔽部を除去して第2フォトレジストパターンが形成されるように、前記第1フォトレジストパターンの第2遮蔽部をアッシング処理し、
前記ソース領域及び前記ドレイン領域が露出するように前記第2フォトレジストパターンをマスクとして前記ゲート絶縁層をエッチングし、
前記ソース領域上にソース接触領域が形成され、前記ドレイン領域上にドレイン接触領域が形成されるように、前記活性層を導体化し、前記導電性チャネルは、前記ソース接触領域、ドレイン接触領域及びチャネル領域により形成される、トップゲート型薄膜トランジスタの製造方法。 - 前記基板上における前記ゲートパターンの投影と前記基板上における前記チャネル領域の投影とが重なる、請求項8に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記第1フォトレジストパターンが形成されるように、前記フォトレジスト層をパターニング処理する前記工程は、前記第1フォトレジストパターンが形成されるように、前記フォトレジスト層をハーフトーンマスクにより露光させ、露光されたフォトレジスト層を現像液により現像する工程を含む、請求項8に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記第1フォトレジストパターンが形成されるように、前記フォトレジスト層をパターニング処理する前記工程は、前記第1フォトレジストパターンが形成されるように、前記フォトレジスト層をハーフトーンマスクにより露光させ、露光されたフォトレジスト層を現像液により現像する工程を含む、請求項9に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記第1フォトレジストパターンの第2遮蔽部を酸素によりアッシング処理することができる、請求項8に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記活性層の材料は、酸化インジウムガリウム亜鉛又はアモルファスシリコンである、請求項8に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記製造方法は、層間絶縁層、ソース及びドレインを形成する工程をさらに含み、
層間絶縁層、ソース及びドレインを形成する前記工程は、
前記第2フォトレジストパターンを剥離し、
前記ゲートパターン、前記ソース接触領域及び前記ドレイン接触領域上に層間絶縁層と、前記層間絶縁層を貫通させる第1ビアホール及び第2ビアホールと、を形成し、前記ソース接触領域及び前記ドレイン接触領域をそれぞれ前記第1ビアホール及び前記第2ビアホールにより露出させ、
前記層間絶縁層上にそれぞれ前記第1ビアホール及び前記第2ビアホールを通じて前記ソース接触領域及び前記ドレイン接触領域に接触する前記ソース及び前記ドレインを形成する、請求項8に記載のトップゲート型薄膜トランジスタの製造方法。 - 前記第2フォトレジストパターンを剥離する前記工程は、
前記第2フォトレジストパターンを剥離液に浸漬する、請求項14に記載のトップゲート型薄膜トランジスタの製造方法。 - 前記ゲート絶縁層の材料は、それぞれ酸化シリコン及び窒化シリコンのうちの一つ以上を含む、請求項8に記載のトップゲート型薄膜トランジスタの製造方法。
- 前記活性層をプラズマガスにより導体化することができる、請求項8に記載のトップゲート型薄膜トランジスタの製造方法。
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