JP2021048339A - 半導体装置及び半導体装置の製造方法 - Google Patents
半導体装置及び半導体装置の製造方法 Download PDFInfo
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- JP2021048339A JP2021048339A JP2019171102A JP2019171102A JP2021048339A JP 2021048339 A JP2021048339 A JP 2021048339A JP 2019171102 A JP2019171102 A JP 2019171102A JP 2019171102 A JP2019171102 A JP 2019171102A JP 2021048339 A JP2021048339 A JP 2021048339A
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- semiconductor device
- insulating layer
- manufacturing
- layer
- aluminum
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 99
- 238000004519 manufacturing process Methods 0.000 title claims description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 79
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 79
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 24
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 36
- 229910052731 fluorine Inorganic materials 0.000 claims description 30
- 239000011737 fluorine Substances 0.000 claims description 30
- 238000005530 etching Methods 0.000 claims description 26
- 238000004140 cleaning Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 13
- 239000004642 Polyimide Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 229920001721 polyimide Polymers 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 229920002120 photoresistant polymer Polymers 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001020 plasma etching Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 238000004380 ashing Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000012298 atmosphere Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 136
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 29
- 230000001681 protective effect Effects 0.000 description 27
- 239000011229 interlayer Substances 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000001004 secondary ion mass spectrometry Methods 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
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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Abstract
Description
第1の実施形態の半導体装置は、半導体基板と、半導体基板の上に設けられた第1の絶縁層と、第1の絶縁層の上に設けられたアルミニウム層と、第1の絶縁層の上に設けられ、アルミニウム層の表面の第1の領域を覆う第2の絶縁層と、アルミニウム層の表面の第1の領域以外の第2の領域の上に設けられ、αアルミナを主成分とし、膜厚が0.5nm以上3nm以下の酸化アルミニウム膜と、を備える。
第2の実施形態の半導体装置は、第2の絶縁層の上にポリイミド層を、更に備える点で、第1の実施形態の半導体装置と異なっている。以下、第1の実施形態と重複する内容については、一部記述を省略する。
20 シリコン基板(半導体基板)
22 層間絶縁層(第1の絶縁層)
24 アルミニウム層
24a 第1の領域
24b 第2の領域
26 保護絶縁層(第2の絶縁層)
28 酸化アルミニウム膜
30 フォトレジスト(マスク材)
38 ポリイミド層(マスク材)
Claims (16)
- 半導体基板と、
前記半導体基板の上に設けられた第1の絶縁層と、
前記第1の絶縁層の上に設けられたアルミニウム層と、
前記第1の絶縁層の上に設けられ、前記アルミニウム層の表面の第1の領域を覆う第2の絶縁層と、
前記アルミニウム層の前記表面の前記第1の領域以外の第2の領域の上に設けられ、αアルミナを主成分とし、膜厚が0.5nm以上3nm以下の酸化アルミニウム膜と、
を備える半導体装置。 - 前記アルミニウム層はシリコン及び銅の少なくともいずれか一方を含む請求項1記載の半導体装置。
- 前記第2の絶縁層の上にポリイミド層を、更に備える請求項1又は請求項2記載の半導体装置。
- 前記第2の領域の上にボンディングワイヤを、更に備える請求項1ないし請求項3いずれか一項記載の半導体装置。
- 前記ボンディングワイヤと前記アルミニウム層との間の一部に前記酸化アルミニウム膜が存在する請求項4記載の半導体装置。
- 半導体基板の上に第1の絶縁層を形成し、
前記第1の絶縁層の上にアルミニウム層を形成し、
前記アルミニウム層のパターニングを行い、
前記第1の絶縁層及び前記アルミニウム層の上に第2の絶縁層を形成し、
前記第2の絶縁層の上にマスク材を形成し、
前記第2の絶縁層を、前記マスク材をマスクにフッ素を含むエッチングガスを用いた反応性イオンエッチング法によりエッチングを行い、前記アルミニウム層の一部の表面を露出させ、
前記一部の表面に、ph6以上ph7.5以下の液体をノズルから噴射する洗浄処理を行う半導体装置の製造方法。 - 前記液体は、ph6以上ph6.9以下又はph7.1以上ph7.5以下の水溶液である請求項6記載の半導体装置の製造方法。
- 前記液体は、酸の希釈溶液又はアルカリの希釈溶液である請求項6又は請求項7記載の半導体装置の製造方法。
- 前記液体は、炭酸を含む請求項6ないし請求項8いずれか一項記載の半導体装置の製造方法。
- 前記液体を窒素ガスと共に噴射する請求項6ないし請求項9いずれか一項記載の半導体装置の製造方法。
- 前記エッチングガスに窒素ガスを含む請求項6ないし請求項10いずれか一項記載の半導体装置の製造方法。
- 前記洗浄処理の後に、非酸化性雰囲気で450℃以下の熱処理を行う請求項6ないし請求項11いずれか一項記載の半導体装置の製造方法。
- 前記マスク材はフォトレジストであり、前記第2の絶縁層のエッチングを行った後、前記洗浄処理を行う前に、前記フォトレジストを50℃以下の温度でアッシングにより剥離する請求項6ないし請求項12いずれか一項記載の半導体装置の製造方法。
- 前記マスク材は感光性ポリイミドである請求項6ないし請求項12いずれか一項記載の半導体装置の製造方法。
- 前記アルミニウム層はシリコン及び銅の少なくともいずれか一方を含む請求項6ないし請求項14いずれか一項記載の半導体装置の製造方法。
- 前記洗浄処理の後に前記一部の表面にボンディングワイヤを接続する請求項6ないし請求項15いずれか一項記載の半導体装置の製造方法。
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