JP6341336B2 - 薄膜素子およびその製造方法 - Google Patents
薄膜素子およびその製造方法 Download PDFInfo
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- JP6341336B2 JP6341336B2 JP2017547728A JP2017547728A JP6341336B2 JP 6341336 B2 JP6341336 B2 JP 6341336B2 JP 2017547728 A JP2017547728 A JP 2017547728A JP 2017547728 A JP2017547728 A JP 2017547728A JP 6341336 B2 JP6341336 B2 JP 6341336B2
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- Prior art keywords
- film
- external electrode
- resist film
- wiring conductor
- resist
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- 239000010409 thin film Substances 0.000 title claims description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000010408 film Substances 0.000 claims description 243
- 239000004020 conductor Substances 0.000 claims description 72
- 230000001681 protective effect Effects 0.000 claims description 46
- 229910000679 solder Inorganic materials 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 238000000206 photolithography Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 36
- 230000004907 flux Effects 0.000 description 13
- 238000007747 plating Methods 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000004380 ashing Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Description
基材と、
前記基材の表面に形成される配線導体膜と、
少なくとも前記配線導体膜の表面に被覆され、平面視で前記配線導体膜と重なる位置にコンタクトホールを有する保護膜と、
前記コンタクトホール内、且つ、前記配線導体膜の表面に形成され、前記保護膜より厚く、側面を有する外部電極と、
前記保護膜の表面に被覆される第1レジスト膜および第2レジスト膜と、
を備え、
前記第1レジスト膜は、前記外部電極の前記側面の全周に沿って接し、
前記第2レジスト膜は、前記外部電極の前記側面および前記第1レジスト膜から離間して配置されることを特徴とする。
基材の表面に配線導体膜を形成する第1工程と、
少なくとも前記配線導体膜の表面に、前記配線導体膜と重なる位置にコンタクトホールを有する保護膜を被覆する第2工程と、
前記コンタクトホール内、且つ、前記配線導体膜の表面に、側面の全周に沿って庇部を有する外部電極を形成する第3工程と、
前記保護膜の表面にレジスト膜を被覆する第4工程と、
前記レジスト膜のうち、平面視で前記庇部に重なる第1レジスト膜と、前記第1レジスト膜以外である第2レジスト膜とを離間する離間部を除去する第5工程と、
を備えることを特徴とする。
図1は第1の実施形態に係る薄膜素子101の外部電極4の構成を示す平面詳細図である。図2は、図1におけるA−A断面図である。図3は薄膜素子101の外部電極4の実際の様子を示す断面図である。図2において、各部の厚みは誇張して図示している。以降の各実施形態における断面図についても同様である。薄膜素子101は、例えばキャパシタ等の受動素子やLC複合電子部品、半導体集積回路素子、ESD保護素子等の薄膜デバイス(Thin−Film Device)である。
第2の実施形態では、外部電極4および第1レジスト膜11の形状が第1の実施形態とは異なる例を示す。
なお、上述の実施形態では、外部電極4の平面形状が円形である例を示したが、これ限定されるものではない。外部電極4の平面形状は、正方形、矩形、多角形、楕円形等、適宜変更可能である。
L1…光線
S1…外部電極の側面
1…基材
2…配線導体膜
3…保護膜
4…外部電極
5…導電性接合材
6…庇部
10…レジスト膜
11…第1レジスト膜
12…第2レジスト膜
31…離間部
41…第1電極層
42…第2電極層
50…界面
51…レジスト膜
61…フォトマスク
100A,100B,101,102…薄膜素子
Claims (7)
- 基材と、
前記基材の表面に形成される配線導体膜と、
少なくとも前記配線導体膜の表面に被覆され、平面視で前記配線導体膜と重なる位置にコンタクトホールを有する保護膜と、
前記コンタクトホール内、且つ、前記配線導体膜の表面に形成され、前記保護膜より厚く、側面を有する外部電極と、
前記保護膜の表面に被覆される第1レジスト膜および第2レジスト膜と、
を備え、
前記第1レジスト膜は、前記外部電極の前記側面の全周に沿って接し、
前記第2レジスト膜は、前記外部電極の前記側面および前記第1レジスト膜から離間して配置され、
前記外部電極は、前記側面の全周に沿って形成される庇部を有し、
前記第1レジスト膜は、平面視で前記庇部に重なる、薄膜素子。 - 前記第1レジスト膜は熱硬化性樹脂である、請求項1に記載の薄膜素子。
- 前記外部電極は、底面から表面に向かって前記側面が逆テーパー状に形成される、請求項1または2に記載の薄膜素子。
- 前記配線導体膜は銅を主成分とする金属膜であり、
前記保護膜はチタンを主成分とする金属膜であり、
前記外部電極はニッケルを主成分とする金属である、請求項1から3のいずれかに記載の薄膜素子。 - 基材の表面に配線導体膜を形成する第1工程と、
少なくとも前記配線導体膜の表面に、前記配線導体膜と重なる位置にコンタクトホールを有する保護膜を被覆する第2工程と、
前記コンタクトホール内、且つ、前記配線導体膜の表面に、側面の全周に沿って庇部を有する外部電極を形成する第3工程と、
前記保護膜の表面にレジスト膜を被覆する第4工程と、
前記レジスト膜のうち、平面視で前記庇部に重なる第1レジスト膜と、前記第1レジスト膜以外である第2レジスト膜とを離間する離間部を除去する第5工程と、
を備える、薄膜素子の製造方法。 - 前記第5工程は、
前記レジスト膜はポジ型感光性レジスト膜であり、前記離間部をフォトリソグラフィにより除去し、
前記外部電極の前記庇部をフォトマスクにして露光する工程を含む、請求項5に記載の薄膜素子の製造方法。 - 前記第5工程の後に、前記外部電極の表面にはんだをプリコートする工程をさらに有する、請求項5または6に記載の薄膜素子の製造方法。
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