JP6834156B2 - 半導体装置および製造方法 - Google Patents
半導体装置および製造方法 Download PDFInfo
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- JP6834156B2 JP6834156B2 JP2016053015A JP2016053015A JP6834156B2 JP 6834156 B2 JP6834156 B2 JP 6834156B2 JP 2016053015 A JP2016053015 A JP 2016053015A JP 2016053015 A JP2016053015 A JP 2016053015A JP 6834156 B2 JP6834156 B2 JP 6834156B2
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- 239000004065 semiconductor Substances 0.000 title claims description 108
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 91
- 229910052721 tungsten Inorganic materials 0.000 claims description 91
- 239000010937 tungsten Substances 0.000 claims description 91
- 238000007747 plating Methods 0.000 claims description 46
- 239000000758 substrate Substances 0.000 claims description 43
- 239000010410 layer Substances 0.000 claims description 39
- 239000011229 interlayer Substances 0.000 claims description 38
- 230000001681 protective effect Effects 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 description 17
- 229910000679 solder Inorganic materials 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
特許文献1 特開2010−267655号公報
Claims (11)
- 半導体基板と、
前記半導体基板に形成された活性領域と、
前記半導体基板において前記活性領域よりも外側に形成されたガードリング部と
を備え、
前記ガードリング部は、
前記半導体基板の上面において環状に形成されたガードリングと、
前記ガードリングの上方に形成された層間絶縁膜と、
前記ガードリングに沿って前記層間絶縁膜の上方に環状に形成されたフィールドプレートと、
前記ガードリングに沿って環状に形成され、前記層間絶縁膜を貫通して1つの前記ガードリングと対向する1つの前記フィールドプレートとを接続する複数のタングステンプラグと、
前記複数のタングステンプラグのうち隣接する2つを接続する接続プラグと
を有し、
前記接続プラグは、前記1つの前記ガードリングと前記対向する1つの前記フィールドプレートの間に設けられる
半導体装置。 - 前記フィールドプレートがタングステンで形成された
請求項1に記載の半導体装置。 - 対応する前記ガードリングおよび前記フィールドプレートの間に、前記複数のタングステンプラグが環状に形成されている
請求項1または2に記載の半導体装置。 - 環状に形成された前記複数のタングステンプラグにおいて、前記複数のタングステンプラグのうち隣接する2つの距離が、前記複数のタングステンプラグのうち1つの1本分の幅よりも大きい
請求項3に記載の半導体装置。 - 前記活性領域の上方に設けられ、アルミニウムを含む材料で形成された素子電極と、
前記素子電極上に形成されためっき層と、
前記めっき層上に形成され、且つ、前記めっき層の一部の領域を露出させる保護膜と
を更に備える請求項2に記載の半導体装置。 - 前記めっき層は、前記素子電極の上面全体に形成される
請求項5に記載の半導体装置。 - 前記活性領域に形成された半導体素子部と、
前記半導体素子部および前記ガードリング部の間において、前記層間絶縁膜を貫通して設けられ、タングステンで形成されたホール引抜プラグと
を更に備える請求項1から6のいずれか一項に記載の半導体装置。 - 前記活性領域の上方に設けられた素子電極を更に備え、
前記フィールドプレートが、前記素子電極と同一の材料で形成された
請求項1に記載の半導体装置。 - 半導体装置の製造方法であって、
ガードリングを、半導体基板の上面において環状に形成するガードリング形成段階と、
前記ガードリングの上方に層間絶縁膜を形成する絶縁膜形成段階と、
前記ガードリングに沿って環状に設けられ、前記層間絶縁膜を貫通する複数のタングステンプラグを形成するとともに、前記ガードリングに沿って前記層間絶縁膜の上方に環状に設けられ、前記複数のタングステンプラグと接続するフィールドプレートを形成するフィールドプレート形成段階と
を備え、
前記フィールドプレート形成段階では、前記複数のタングステンプラグのうち隣接する2つを接続し、前記ガードリングと前記フィールドプレートの間に設けられ、前記複数のタングステンプラグと同じ工程で形成される接続プラグを形成する
製造方法。 - 前記半導体基板の上面において前記ガードリングで囲まれる活性領域に、アルミニウムを含む材料で素子電極を形成する素子電極形成段階と、
前記素子電極形成段階および前記フィールドプレート形成段階の後に、前記半導体基板の上面側をめっきして、前記素子電極上にめっき層を形成するめっき段階と、
前記半導体基板の上面側に保護膜を形成する保護膜形成段階と
を更に備える請求項9に記載の製造方法。 - 前記めっき段階では、前記めっき層を前記素子電極の上面全体に形成する
請求項10に記載の製造方法。
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