JP2018026499A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2018026499A JP2018026499A JP2016158687A JP2016158687A JP2018026499A JP 2018026499 A JP2018026499 A JP 2018026499A JP 2016158687 A JP2016158687 A JP 2016158687A JP 2016158687 A JP2016158687 A JP 2016158687A JP 2018026499 A JP2018026499 A JP 2018026499A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 382
- 239000010410 layer Substances 0.000 claims description 295
- 239000000758 substrate Substances 0.000 claims description 129
- 239000011229 interlayer Substances 0.000 claims description 63
- 229910021332 silicide Inorganic materials 0.000 claims description 28
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 28
- 238000002955 isolation Methods 0.000 claims description 13
- 239000002344 surface layer Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 31
- 230000004048 modification Effects 0.000 description 44
- 238000012986 modification Methods 0.000 description 44
- 239000012535 impurity Substances 0.000 description 39
- 238000009792 diffusion process Methods 0.000 description 33
- 125000006850 spacer group Chemical group 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 14
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 8
- 229910052721 tungsten Inorganic materials 0.000 description 8
- 239000010937 tungsten Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 7
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 7
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 229910052814 silicon oxide Inorganic materials 0.000 description 6
- 125000001475 halogen functional group Chemical group 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 229910015900 BF3 Inorganic materials 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】半導体装置SM1は、回路形成領域を取り囲むシールリング領域1Cに形成された環状のシールリングSRを備える。シールリングSRは、BOX層BXと、n型半導体層NRと、複数層の配線MR1、MR2,MR3,MR4,MR5から構成される環状の電極部ESRと、を有し、電極部ESRは、プラグ電極PLを介してn型半導体層NRと電気的に接続する。
【選択図】図1
Description
≪半導体装置の構成≫
本実施の形態1による半導体装置の構成について図1を用いて説明する。図1は、本実施の形態1による半導体装置を説明する断面図であり、半導体装置の回路形成領域に形成されたSOI(Silicon On Insulator)トランジスタおよびバルクトランジスタ、並びに回路形成領域を取り囲むシールリング領域に形成された環状のシールリングを例示する。
以下の説明では、MOS構造のnチャネル型SOIトランジスタをn型SOIトランジスタと略し、MOS構造のpチャネル型SOIトランジスタをp型SOIトランジスタと略して、記載する。
以下の説明では、MOS構造のnチャネル型バルクトランジスタをn型バルクトランジスタと略し、MOS構造のpチャネル型バルクトランジスタをp型バルクトランジスタと略して、記載する。
シールリングSRは、p型の単結晶シリコンからなる半導体基板SB上に形成されたBOX層BXと、BOX層BX上に形成されたn型の単結晶シリコンからなるn型半導体層NRと、n型半導体層NRの上部(表層部)に形成されたシリサイド層MSを介してn型半導体層NRと電気的に接続する電極部ESRとから構成される。
本実施の形態1によるシールリングSRでは、前述したように、第1シールリング電極SR1および第2シールリング電極SR2から構成される電極部ESRは、シリサイド層MSおよびプラグ電極PLを介してn型半導体層NRと電気的に接続する。そして、n型半導体層NRはBOX層BX上に形成されている。従って、第1シールリング電極SR1および第2シールリング電極SR2から構成される電極部ESRと、p型の半導体基板SBとの間には、n型半導体層NR、BOX層BXおよびp型ウェルPWRが存在することになる。
本実施の形態1による半導体装置の製造方法について図2〜図6を用いて説明する。図2〜図6は、本実施の形態1による半導体装置の製造工程を説明する断面図である。
以下、本実施の形態1の変形例(第1変形例〜第6変形例)による半導体装置の構成について説明する。
本実施の形態1の第1変形例による半導体装置の構成について図7を用いて説明する。図7は、本実施の形態1の第1変形例による半導体装置を説明する断面図である。
本実施の形態1の第2変形例による半導体装置の構成について図8を用いて説明する。図8は、本実施の形態1の第2変形例による半導体装置を説明する断面図である。
本実施の形態1の第3変形例による半導体装置の構成について図9を用いて説明する。図9は、本実施の形態1の第3変形例による半導体装置を説明する断面図である。
本実施の形態1の第4変形例による半導体装置の構成について図10を用いて説明する。図10は、本実施の形態1の第4変形例による半導体装置を説明する断面図である。
本実施の形態1の第5変形例による半導体装置の構成について図11を用いて説明する。図11は、本実施の形態1の第5変形例による半導体装置を説明する断面図である。
本実施の形態1の第6変形例による半導体装置の構成について図12を用いて説明する。図12は、本実施の形態1の第6変形例による半導体装置を説明する断面図である。
≪半導体装置の構成≫
本実施の形態2による半導体装置の構成について図13および図14を用いて説明する。図13は、本実施の形態2による半導体装置を説明する平面図である。図14は、図13のA−A線に沿った断面図である。
≪半導体装置の構成≫
本実施の形態3による半導体装置の構成について図15および図16を用いて説明する。図15は、本実施の形態3による半導体装置を説明する平面図である。図16は、図15のB−B線に沿った断面図である。
≪半導体装置の構成≫
本実施の形態4による半導体装置の構成について図17および図18を用いて説明する。図17は、本実施の形態4による半導体装置を説明する平面図である。図18は、図17のC−C線に沿った断面図である。
本実施の形態4の変形例による半導体装置の構成について図19を用いて説明する。図19は、本実施の形態4の変形例による半導体装置を説明する断面図である。
1B バルク領域
1C シールリング領域
AC アナログ回路部
BN nチャネル型バルクトランジスタ
BP pチャネル型バルクトランジスタ
BX BOX層
CT 接続孔
DC デジタル回路部
DF ダイシング面
DNW 埋め込みn型ウェル
EP エピタキシャル層
ESR 電極部
GEBn,GEBp,GESn,GESp ゲート電極
GIBn,GIBp,GISn,GISp ゲート絶縁膜
IL1〜IL5 第1〜第5層間絶縁膜
M1〜M5,MR1〜MR5 配線
MS シリサイド層
NB ソース・ドレイン用半導体領域
NB1 n型エクステンション層
NB2 n型拡散層
NR n型半導体層
NRR n型拡散層
NS ソース・ドレイン用半導体領域
NS1 n型エクステンション層
NS2 n型拡散層
NSL n型半導体層
NWB,NWR,NWS n型ウェル
PB ソース・ドレイン用半導体領域
PB1 p型エクステンション層
PB2 p型拡散層
PE パッド電極
PL プラグ電極
PO 多結晶シリコン膜
PR p型半導体層
PRR p型拡散層
PS ソース・ドレイン用半導体領域
PS1 p型エクステンション層
PS2 p型拡散層
PSL p型半導体層
PSN 絶縁膜
PWB,PWR,PWS p型ウェル
RF 保護膜
SB 半導体基板
SL 半導体層
SM1,SM1a,SM1b,SM1c,SM1d,SM1e,SM1f 半導体装置
SM2,SM3,SM4 半導体装置
SN nチャネル型SOIトランジスタ
SP pチャネル型SOIトランジスタ
SR シールリング
SR1 第1シールリング電極
SR2 第2シールリング電極
SR3 第3シールリング電極
SRB,SRC シードリングの一部
STI 素子分離部
SWB,SWS サイドウォールスペーサ
VA1〜VA4 第1〜第4導電膜
Claims (16)
- 第1領域と、
前記第1領域の外周を囲む第2領域と、
前記第2領域に形成された環状のシールリングと、
を備える半導体装置であって、
前記第2領域は、
第1導電型の半導体基板、前記半導体基板上の埋め込み絶縁膜および前記埋め込み絶縁膜上の半導体層とから構成されるSOI基板と、
前記半導体層上に設けられた層間絶縁膜と、
を有し、
前記シールリングは、
前記層間絶縁膜に埋設された導電膜からなる環状の電極部と、
前記半導体層と、
前記埋め込み絶縁膜と、
を有し、
前記電極部は前記半導体層と電気的に接続している、半導体装置。 - 請求項1記載の半導体装置において、
前記半導体層の表層部にシリサイド層が設けられている、半導体装置。 - 請求項1記載の半導体装置において、
前記シールリングは、前記半導体基板と前記埋め込み絶縁膜との界面から第1深さを有して、前記半導体基板に設けられた第1ウェルをさらに有し、
前記半導体層は、前記第1導電型と異なる第2導電型であり、
前記第1ウェルは、前記第1導電型である、半導体装置。 - 請求項3記載の半導体装置において、
前記シールリングは、前記第1ウェルの底面を取り囲む、前記第2導電型の第1埋め込みウェルをさらに有する、半導体装置。 - 請求項1記載の半導体装置において、
前記シールリングは、前記半導体基板と前記埋め込み絶縁膜との界面から第2深さを有して、前記半導体基板に設けられた第2ウェルと、前記半導体基板と前記埋め込み絶縁膜との界面から、前記第2深さよりも浅い第3深さを有して、前記半導体基板に設けられた半導体領域と、をさらに有し、
前記半導体層および前記第2ウェルは、前記第1導電型と異なる第2導電型であり、
前記半導体領域は、前記第1導電型である、半導体装置。 - 請求項1記載の半導体装置において、
前記シールリングは、前記半導体基板と前記埋め込み絶縁膜との界面から第4深さを有して、前記半導体基板に設けられた第3ウェルをさらに有し、
前記半導体層は、前記第1導電型であり、
前記第3ウェルは、前記第1導電型と異なる第2導電型である、半導体装置。 - 請求項1記載の半導体装置において、
前記シールリングは、前記半導体基板と前記埋め込み絶縁膜との界面から第5深さを有して、前記半導体基板に設けられた第4ウェルをさらに有し、
前記半導体層および前記第4ウェルは、前記第1導電型と異なる第2導電型である、半導体装置。 - 請求項1記載の半導体装置において、
前記シールリングは、前記半導体基板と前記埋め込み絶縁膜との界面から第6深さを有して、前記半導体基板に設けられた第5ウェルをさらに有し、
前記半導体層および前記第5ウェルは、前記第1導電型である、半導体装置。 - 請求項8記載の半導体装置において、
前記シールリングは、前記第5ウェルの底面を取り囲む、前記第1導電型と異なる第2導電型の第2埋め込みウェルをさらに有する、半導体装置。 - 請求項1記載の半導体装置において、
前記シールリングの一部では、前記電極部が前記半導体層と接続していない、半導体装置。 - 請求項1記載の半導体装置において、
前記第1領域には、アナログ回路が形成されており、
前記アナログ回路に近接する前記シールリングの一部では、前記電極部が前記半導体層と接続していない、半導体装置。 - 請求項1記載の半導体装置において、
前記シールリングの一部では、前記埋め込み絶縁膜が形成されておらず、前記半導体層が前記半導体基板に接続する、半導体装置。 - 請求項1記載の半導体装置において、
前記半導体基板は平面視において四角形状であり、
前記シールリングは、前記半導体基板の周縁に沿って設けられており、
前記半導体基板の角部に近接する前記シールリングの一部では、前記埋め込み絶縁膜が形成されておらず、前記半導体層が前記半導体基板に接続する、半導体装置。 - 請求項1記載の半導体装置において、
前記電極部は、前記第1領域側に設けられた環状の第1シールリング電極と、前記第1シールリング電極と離間して、前記第1領域と反対側に設けられた環状の第2シールリング電極と、前記第1シールリング電極および前記第2シールリング電極と離間して、前記第1シールリング電極と前記第2シールリング電極との間に設けられた環状の第3シールリング電極と、から構成され、
前記第1シールリング電極および前記第3シールリング電極の直下には、前記埋め込み絶縁膜が配置され、前記第2シールリング電極の直下には、前記埋め込み絶縁膜が配置されていない、半導体装置。 - 請求項14記載の半導体装置において、
前記第1シールリング電極および前記第3シールリング電極は、前記埋め込み絶縁膜上の前記半導体層の表層部に設けられた第1シリサイド層と接続し、
前記第2シールリング電極は、前記半導体基板の表層部に設けられた第2シリサイド層と接続する、半導体装置。 - 請求項14記載の半導体装置において、
前記第1シールリング電極および前記第3シールリング電極が設けられる領域と、前記第2シールリング電極が設けられる領域との間に、素子分離部が設けられている、半導体装置。
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US11699663B2 (en) * | 2020-04-27 | 2023-07-11 | Taiwan Semiconductor Manufacturing Company, Ltd. | Passivation scheme design for wafer singulation |
US20230019608A1 (en) * | 2021-07-09 | 2023-01-19 | Taiwan Semiconductor Manufacturing Company, Ltd. | Seal ring for semiconductor device with gate-all-around transistors |
WO2023050267A1 (zh) * | 2021-09-30 | 2023-04-06 | 京东方科技集团股份有限公司 | 显示基板及相关显示母板和显示面板 |
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