JP6594261B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6594261B2 JP6594261B2 JP2016102958A JP2016102958A JP6594261B2 JP 6594261 B2 JP6594261 B2 JP 6594261B2 JP 2016102958 A JP2016102958 A JP 2016102958A JP 2016102958 A JP2016102958 A JP 2016102958A JP 6594261 B2 JP6594261 B2 JP 6594261B2
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Description
以下、図面を参照しながら本実施の形態の半導体装置について詳細に説明する。
図1は、本実施の形態の半導体装置の第1構成を示す断面図であり、図2は、本実施の形態の半導体装置の第1構成を示す平面図である。図1は、例えば、図2(A)のA−A断面部に対応する。図2(B)は、2つの活性領域1Acの平面図を示す。なお、図面を分かりやすくするため、平面図において、ゲート電極GE1の周囲に配置される側壁膜SWを省略している。また、後述するように、本実施の形態の半導体装置においては、SOI領域1Aとバルク領域2Aとを有する場合がある(図8、図9参照)。図1および図2においては、SOI領域1Aが示されている。
次いで、SOI領域1Aとバルク領域2Aとを有する半導体装置について説明する。具体的には、SOI基板を用いて半導体装置を形成する場合、上記半導体層SLに形成されるMISFET(ここでは、SOI−MISFETという)と、絶縁層BOXと半導体層SLとを除去した支持基板(いわゆる、バルク基板)SBに形成されるMISFET(ここでは、バルクMISFETという)とが混載される場合がある。なお、SOI−MISFETとするか、バルクMISFETとするかは、要求される回路機能に応じて適宜選択される。
次いで、図11〜図28を参照しながら本実施の形態の半導体装置の製造工程を説明するとともに、本実施の形態の半導体装置の構成をより明確にする。図11〜図28は、実施の形態1の半導体装置の製造工程を示す断面図である。なお、図1に示す半導体装置は、図8に示す応用例の半導体装置の左側と同様であり、類似の製造工程で形成することができるため、図8に示す応用例の半導体装置を例として、製造工程を説明する。
本実施の形態においては、上記実施の形態1の半導体装置の変形例について説明する。
実施の形態1においては、図2を参照しながら説明したように、X方向に並んで配置された2つの活性領域1Ac間において、Y方向に延在するように、ダミーゲート電極DGE1およびダミー側壁膜DSWの合成体(以下、これをダミーパターンとも言う)を形成したが、このダミーパターンをX方向にも延在させてもよい。
実施の形態1においては、図2を参照しながら説明したように、X方向に並んで配置された2つの活性領域1Ac間において、Y方向に延在するように、1本のダミーパターンを形成したが、2本のダミーパターンを設けてもよい。
上記変形例2においては、2つの活性領域1AcのX方向の間隔が広い場合について説明したが、本応用例においては、2つの活性領域1AcのX方向の間隔が狭い場合について説明する。
実施の形態1(図1、図8)においては、SOI領域1AのMISFETとして、nチャネル型のMISFETを例示し、また、バルク領域2AのMISFETとして、nチャネル型のMISFETを例示したが、もちろん、これらの領域に、pチャネル型のMISFETを形成してもよい。この場合、ウエル(PW1、PW2)、低濃度不純物領域(EX1、EX2)および高濃度不純物領域(SD1、SD2)が、逆導電型となる。
1Ac 活性領域
1Iso 素子分離領域
2A バルク領域
2Ac 活性領域
2Iso 素子分離領域
BOX 絶縁層
C1 コンタクトホール
CAP キャップ絶縁膜
DGE1 ダミーゲート電極
DGE2 ダミーゲート電極
DSW ダミー側壁膜
EP エピタキシャル層
EX1 n型の低濃度不純物領域
EX2 n型の低濃度不純物領域
GE1 ゲート電極
GE2 ゲート電極
GI1 ゲート絶縁膜
GI2 ゲート絶縁膜
IL1 層間絶縁膜
IL1a 薄い窒化シリコン膜
IL1b 酸化シリコン膜
IL2 層間絶縁膜
IL2a 薄い窒化シリコン膜
IL2b 酸化シリコン膜
L1 距離
L2 距離
M1 配線
NA nチャネル型のMISFETの形成領域
OX 酸化膜
P1 プラグ
PA pチャネル型のMISFETの形成領域
PS 多結晶シリコン膜
PW1 p型ウエル
PW2 p型ウエル
R 窪み
S1 第1膜
S2 第2膜
S3 第3膜
S4 第4膜
SB 支持基板
SD1 高濃度不純物領域
SD2 高濃度不純物領域
SIL 金属シリサイド層
SL 半導体層
STI 素子分離絶縁膜
SW 側壁膜
Claims (8)
- 第1活性領域、および前記第1活性領域に接して配置された素子分離領域を有し、かつ、支持基板、前記支持基板上に形成された絶縁層、および前記絶縁層上に形成された半導体層を有するSOI基板と、
前記第1活性領域の前記半導体層上にゲート絶縁膜を介して形成されたゲート電極と、
前記第1活性領域の前記半導体層のうち、前記ゲート電極の両側に形成されたソース領域およびドレイン領域と、
前記素子分離領域に形成されたダミーゲート電極と、
前記ダミーゲート電極の両側に形成された側壁膜と、
を含み、
前記素子分離領域に形成され、かつ、前記半導体層および前記絶縁層を貫通するように前記支持基板まで到達する溝内には、絶縁膜が埋め込まれており、
前記絶縁膜上に形成された前記側壁膜は、前記第1活性領域と前記素子分離領域との境界に沿って配置される、半導体装置。 - 請求項1記載の半導体装置において、
前記側壁膜は、前記第1活性領域と前記素子分離領域との境界と一致または重なるように配置される、半導体装置。 - 請求項2記載の半導体装置において、
前記ソース領域および前記ドレイン領域のそれぞれの上には、コンタクトプラグが形成されている、半導体装置。 - 請求項2記載の半導体装置において、
前記第1活性領域と前記素子分離領域との境界部において、前記絶縁膜の表面は、前記半導体層の表面より低い、半導体装置。 - 請求項4記載の半導体装置において、
前記ソース領域および前記ドレイン領域上には、前記ソース領域および前記ドレイン領域を構成する半導体と金属との化合物膜が、それぞれ形成されている、半導体装置。 - 請求項5記載の半導体装置において、
前記ソース領域および前記ドレイン領域のそれぞれは、前記半導体層と、前記半導体層と前記化合物膜との間のエピタキシャル層との積層部に形成された不純物領域から成る、半導体装置。 - 請求項6記載の半導体装置において、
前記側壁膜の端部は、前記エピタキシャル層の上方に位置する、半導体装置。 - 請求項2記載の半導体装置において、
前記SOI基板は、さらに、前記素子分離領域を介して前記第1活性領域と離間して配置された第2活性領域を有し、
前記第2活性領域には、前記SOI基板を構成する前記絶縁層と、前記SOI基板を構成する前記半導体層とを有しておらず、
前記素子分離領域は、断面視において、前記第2活性領域よりも前記第1活性領域側に位置する第1外周部と、前記第1活性領域よりも前記第2活性領域側に位置する第2外周部と、を有し、
前記ダミーゲート電極は、前記第1外周部上に配置されているが、前記第2外周部上には配置されていない、半導体装置。
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| TW106109427A TW201806116A (zh) | 2016-05-24 | 2017-03-22 | 半導體裝置及半導體裝置之製造方法 |
| US15/583,829 US20170345750A1 (en) | 2016-05-24 | 2017-05-01 | Semiconductor device and method for manufacturing semiconductor device |
| EP17169993.7A EP3249688B1 (en) | 2016-05-24 | 2017-05-08 | Semiconductor device |
| CN201710317887.0A CN107424998B (zh) | 2016-05-24 | 2017-05-08 | 半导体器件及半导体器件的制造方法 |
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2016
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-
2017
- 2017-03-22 TW TW106109427A patent/TW201806116A/zh unknown
- 2017-05-01 US US15/583,829 patent/US20170345750A1/en not_active Abandoned
- 2017-05-08 CN CN201710317887.0A patent/CN107424998B/zh active Active
- 2017-05-08 EP EP17169993.7A patent/EP3249688B1/en active Active
- 2017-05-19 KR KR1020170062079A patent/KR102307226B1/ko active Active
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| Publication number | Publication date |
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| EP3249688B1 (en) | 2020-10-28 |
| US20190393248A1 (en) | 2019-12-26 |
| KR20170132673A (ko) | 2017-12-04 |
| KR102307226B1 (ko) | 2021-10-01 |
| JP2017212267A (ja) | 2017-11-30 |
| EP3249688A1 (en) | 2017-11-29 |
| TW201806116A (zh) | 2018-02-16 |
| CN107424998B (zh) | 2023-05-09 |
| CN107424998A (zh) | 2017-12-01 |
| US20170345750A1 (en) | 2017-11-30 |
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