JP6386133B2 - ラップアラウンド接点集積方式 - Google Patents
ラップアラウンド接点集積方式 Download PDFInfo
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- JP6386133B2 JP6386133B2 JP2017103717A JP2017103717A JP6386133B2 JP 6386133 B2 JP6386133 B2 JP 6386133B2 JP 2017103717 A JP2017103717 A JP 2017103717A JP 2017103717 A JP2017103717 A JP 2017103717A JP 6386133 B2 JP6386133 B2 JP 6386133B2
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- film
- raised
- dielectric film
- metal
- dielectric
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- 238000000034 method Methods 0.000 title claims description 54
- 230000010354 integration Effects 0.000 title description 4
- 230000008569 process Effects 0.000 claims description 32
- 238000005530 etching Methods 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 12
- 229910044991 metal oxide Inorganic materials 0.000 claims description 11
- 150000004706 metal oxides Chemical class 0.000 claims description 11
- 238000000151 deposition Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052914 metal silicate Inorganic materials 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 239000010408 film Substances 0.000 description 59
- 239000000463 material Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000010926 purge Methods 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 229910004541 SiN Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02181—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing hafnium, e.g. HfO2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02186—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing titanium, e.g. TiO2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02189—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing zirconium, e.g. ZrO2
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Description
Claims (19)
- 基板処理方法であって、
第1誘電膜内において隆起した接点及び前記第1誘電膜上の第2誘電膜を含む基板を提供するステップであって、前記第2誘電膜は、側壁及び底部を有する凹状フィーチャを前記隆起した接点の上方に備え、前記隆起した接点は、前記第1誘電膜の下に埋設されている、ステップと、
前記凹状フィーチャの前記側壁上及び前記底部上にコンフォーマル膜を堆積するステップと、
第1異方性エッチングプロセスにおいて、前記底部から前記コンフォーマル膜を除去するステップであって、残りの前記コンフォーマル膜は前記側壁上に保護膜を形成し、前記凹状フィーチャの幅を確定する、ステップと、
第2異方性エッチングプロセスを使用して、前記第1誘電膜の前記隆起した接点まで前記凹状フィーチャを拡張し、前記隆起した接点を露出させるステップと、
等方性エッチングプロセスにおいて、前記隆起した接点を収容する空洞を形成するステップであって、前記空洞の幅は前記凹状フィーチャの幅より大きい、ステップと、
を含む方法。 - さらに、前記凹状フィーチャ内及び前記空洞内にバリア層を堆積するステップを含む、
請求項1記載の方法。 - 前記バリア層は、Ti層、TiN層又はTi層とTiN層の両方を含む、
請求項2記載の方法。 - さらに、前記凹状フィーチャ及び前記空洞を金属で充填するステップを含む、
請求項1記載の方法。 - 前記金属は、タングステン(W)及び銅(Cu)を含むグループから選択される、
請求項4記載の方法。 - さらに、前記充填するステップの前に、前記凹状フィーチャから前記保護膜を除去するステップを含む、
請求項4記載の方法。 - 前記第1誘電膜、第2誘電膜又は前記第1誘電膜と第2誘電膜の両方は、SiO2を含む、
請求項1記載の方法。 - 前記コンフォーマル膜は、HfO2、ZrO2、TiO2、Al2O3及びそれらの組み合わせからなるグループから選択される金属酸化物膜を含む、
請求項1記載の方法。 - 前記コンフォーマル膜は、金属酸化物膜、金属窒化物膜、金属酸化窒化物膜、金属ケイ酸塩膜及びそれらの組み合わせからなるグループから選択される、
請求項1記載の方法。 - 前記隆起した接点はSiGe又はSiCを含む、
請求項1記載の方法。 - 基板処理方法であって、
第1誘電膜内において隆起した接点及び前記第1誘電膜上の第2誘電膜を含む基板を提供するステップであって、前記第2誘電膜は、側壁及び底部を有する凹状フィーチャを前記隆起した接点の上方に備え、前記隆起した接点は、前記第1誘電膜の下に埋設されている、ステップと、
前記側壁上及び前記底部上にコンフォーマル膜を堆積するステップと、
第1異方性エッチングプロセスにおいて、前記底部から前記コンフォーマル膜を除去するステップであって、残りの前記コンフォーマル膜は前記側壁上に保護膜を形成し、前記凹状フィーチャの幅を確定する、ステップと、
第2異方性のエッチングプロセスを使用して前記隆起した接点まで前記凹状フィーチャを拡張し、前記隆起した接点を露出させるステップと、
等方性エッチングプロセスにおいて、前記隆起した接点を収容する空洞を形成するステップであって、前記空洞の幅は前記凹状フィーチャの幅より大きい、ステップと、
前記凹状フィーチャ及び前記空洞を金属で充填するステップと、
を備える方法。 - 半導体装置であって、
第1誘電膜内の空洞内において隆起した接点及び前記第1誘電膜上の第2誘電膜を含む基板であって、前記第2誘電膜は、側壁を有する凹状フィーチャを前記隆起した接点の上方に備える、基板と、
前記凹状フィーチャの幅を確定する、前記側壁上の保護膜と、
前記空洞及び前記凹状フィーチャを充填する金属であって、前記空洞の幅は前記凹状フィーチャの幅より大きい、金属と、
を備える、半導体装置。 - さらに、前記凹状フィーチャ内及び前記空洞内のバリア層を備える、
請求項12記載の半導体装置。 - 前記バリア層は、Ti層、TiN層又はTi層とTiN層の両方を含む、
請求項13記載の半導体装置。 - 金属は、タングステン(W)又は銅(Cu)より成るグループから選択される、
請求項12記載の半導体装置。 - 前記第1誘電膜、第2誘電膜又は前記第1誘電膜と第2誘電膜の両方は、SiO2を含む、
請求項12記載の半導体装置。 - 前記保護膜は、HfO2、ZrO2、TiO2、Al2O3及びそれらの組み合わせからなるグループから選択される金属酸化物膜を含む、
請求項12記載の半導体装置。 - 前記保護膜は、金属酸化物膜、金属窒化物膜、金属酸化窒化物膜、金属ケイ酸塩膜及びそれらの組み合わせからなるグループから選択される、
請求項12記載の半導体装置。 - 前記隆起した接点は、SiGe又はSiCを含む、
請求項12記載の半導体装置。
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