JP7462537B2 - 半導体装置 - Google Patents
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- JP7462537B2 JP7462537B2 JP2020192122A JP2020192122A JP7462537B2 JP 7462537 B2 JP7462537 B2 JP 7462537B2 JP 2020192122 A JP2020192122 A JP 2020192122A JP 2020192122 A JP2020192122 A JP 2020192122A JP 7462537 B2 JP7462537 B2 JP 7462537B2
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Description
<半導体装置の構造について>
本実施の形態の半導体装置について、図面を参照して説明する。図1は、本実施の形態の半導体装置の要部平面図であり、図2~図6は、本実施の形態の半導体装置の要部断面図である。図1のA-A線の断面図が、図2にほぼ対応し、図1のB-B線の断面図が、図3にほぼ対応し、図1のC-C線の断面図が、図4にほぼ対応し、図1のD-D線の断面図が、図5にほぼ対応している。図1~図5は、抵抗素子3が形成された抵抗素子形成領域1Bの平面図および断面図に対応し、図6は、MISFET2が形成されたMISFET形成領域1Aの断面図に対応している。また、図1に示されるX方向およびY方向は、SOI基板1の主面に略平行な方向であり、X方向とY方向とは互いに直交している。
本実施の形態の半導体装置の製造工程を、図面を参照して説明する。図8~図25は、本実施の形態の半導体装置の製造工程中の要部断面図である。図8~図25のそれぞれには、上記図6に相当する断面(MISFET形成領域1Aの断面)と、上記図2に相当する断面(抵抗素子形成領域1Bの断面)とが、示されている。
図26は、本発明者が検討した検討例の半導体装置の要部断面図であり、図26には、抵抗素子103が形成された領域の断面図が示されている。
本実施の形態の主要な特徴のうちの一つは、SOI基板を構成する半導体層SMと、半導体層SM上に形成したエピタキシャル半導体層(半導体層EP)とにより、抵抗素子3を形成したことである。
次に、本実施の形態の半導体装置の変形例について説明する。
1A MISFET形成領域
1B 抵抗素子形成領域
2 MISFET
3 抵抗素子
4 バイアス電流生成部
103 抵抗素子
BX 絶縁層
CT,CT2a,CT2b コンタクトホール
CP 絶縁膜
EP 半導体層
EP1a,EP1b,EP1c,EP1d 半導体部
EX n-型半導体領域
GE ゲート電極
GF ゲート絶縁膜
L1,L2 絶縁膜
LM1 積層体
M1,M1a,M1b 配線
MS 金属シリサイド層
NW1,NW2,NW3 n型半導体領域
PG,PG1a,PG1b,PG2a,PG2b,PG102a,PG102b プラグ
PW1,PW2 p型半導体領域
RG1a,RG1b,RG2 領域
RP1,RP2 フォトレジストパターン
SB 半導体基板
SD n+型半導体領域
SM,SMa,SMb 半導体層
ST 素子分離領域
ST1 素子分離溝
SW1,SW2 サイドウォールスペーサ
ZM1,ZM2 絶縁膜
ZMP1,ZMP2 絶縁膜パターン
Claims (19)
- 基板と、前記基板の第1領域に形成された抵抗素子と、前記基板の第2領域に形成されたMISFETと、を備える半導体装置であって、
前記基板は、支持基板、前記支持基板上の絶縁層、および前記絶縁層上の半導体層を有し、
前記抵抗素子は、
前記第1領域に位置する前記半導体層と、
前記第1領域に位置する前記半導体層上に形成されたエピタキシャル半導体層と、
からなり、
前記エピタキシャル半導体層は、
前記第1領域に位置する前記半導体層上に形成された第1半導体部と、
前記第1領域に位置する前記半導体層上に形成され、かつ、前記第1半導体部から離間した第2半導体部と、
を有し、
前記第1領域に位置する前記半導体層は、
その上に前記第1半導体部が形成された第1接続部と、
その上に前記第2半導体部が形成された第2接続部と、
前記第1接続部と前記第2接続部の間に位置し、かつ、その上に前記エピタキシャル半導体層が形成されていない素子部と、
を有し、
前記素子部の不純物濃度は、1×10 21 /cm 3 以上である、半導体装置。 - 請求項1記載の半導体装置において、
前記第1半導体部および前記第2半導体部のそれぞれの表面に、金属シリサイド層が形成されている、半導体装置。 - 請求項1記載の半導体装置において、
前記基板に形成され、前記半導体層および前記絶縁層を貫通して底部が前記支持基板に達する素子分離領域を更に備え、
前記第1領域に位置する前記半導体層は、平面視において、周囲を前記素子分離領域により囲まれている、半導体装置。 - 請求項3記載の半導体装置において、
前記第2領域に位置する前記半導体層は、平面視において、周囲を前記素子分離領域により囲まれており、
前記第1領域に位置する前記半導体層と、前記第2領域に位置する前記半導体層とは、前記素子分離領域により離間されている、半導体装置。 - 請求項1記載の半導体装置において、
前記エピタキシャル半導体層は、前記第2領域に位置する前記半導体層上にも形成されており、
前記エピタキシャル半導体層は、
前記第2領域に位置する前記半導体層上に形成された第3半導体部と、
前記第2領域に位置する前記半導体層上に形成され、かつ、前記第3半導体部から離間した第4半導体部と、
を有し、
前記MISFETは、前記第2領域に位置する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を有し、
前記MISFETのソース領域は、前記第2領域に位置する前記半導体層および前記第3半導体部に形成され、
前記MISFETのドレイン領域は、前記第2領域に位置する前記半導体層および前記第4半導体部に形成されている、半導体装置。 - 請求項5記載の半導体装置において、
前記ゲート電極は、平面視において、前記第3半導体部と前記第4半導体部との間に配置されている、半導体装置。 - 請求項5記載の半導体装置において、
前記素子部の不純物濃度は、前記ソース領域および前記ドレイン領域のそれぞれの不純物濃度と同じである、半導体装置。 - 請求項7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不純物濃度は、1×1021/cm3以上である、半導体装置。 - 請求項5記載の半導体装置において、
前記素子部の厚さは、前記ゲート電極の厚さよりも薄い、半導体装置。 - 請求項9記載の半導体装置において、
前記素子部の厚さは、前記ゲート電極の下の前記半導体層の厚さと同じである、半導体装置。 - 請求項10記載の半導体装置において、
前記素子部の厚さは、30nm以下である、半導体装置。 - 請求項10記載の半導体装置において、
前記素子部の厚さは、3nm~30nmである、半導体装置。 - 請求項1記載の半導体装置において、
前記素子部の厚さは、30nm以下である、半導体装置。 - 請求項1記載の半導体装置において、
前記素子部の厚さは、3nm~30nmである、半導体装置。 - 請求項1記載の半導体装置において、
前記基板上に、前記半導体層および前記エピタキシャル半導体層を覆うように形成された層間絶縁膜を更に備え、
前記層間絶縁膜には、複数の導電性プラグが埋め込まれており、
前記複数の導電性プラグは、前記第1半導体部上に形成され、かつ、前記第1半導体部と電気的に接続された第1プラグと、前記第2半導体部上に形成され、かつ、前記第2半導体部と電気的に接続された第2プラグと、を含んでいる、半導体装置。 - 請求項15記載の半導体装置において、
前記第1半導体部および前記第2半導体部のそれぞれの表面に、金属シリサイド層が形成されており、
前記第1プラグは、前記第1半導体部の表面に形成された前記金属シリサイド層と接し、
前記第2プラグは、前記第2半導体部の表面に形成された前記金属シリサイド層と接している、半導体装置。 - 請求項16記載の半導体装置において、
前記第1領域に位置する前記半導体層の表面には、金属シリサイド層は形成されていない、半導体装置。 - 支持基板と、
前記支持基板上に形成された絶縁層と、
前記絶縁層上に形成された半導体層と、
前記半導体層上に形成されたエピタキシャル半導体層と、
を有し、
前記エピタキシャル半導体層は、
前記半導体層上に形成された第1半導体部と、
前記半導体層上に形成され、かつ、前記第1半導体部から離間した第2半導体部と、
を有し、
前記半導体層は、
その上に前記第1半導体部が形成された第1接続部と、
その上に前記第2半導体部が形成された第2接続部と、
前記第1接続部と前記第2接続部の間に位置し、かつ、その上に前記エピタキシャル半導体層が形成されていない素子部と、
を有し、
前記素子部の厚さは、30nm以下であり、
前記素子部の不純物濃度は、1×1021/cm3以上である、半導体装置。 - 請求項18記載の半導体装置において、
前記素子部の厚さは、3nm~30nmである、半導体装置。
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JP2009064860A (ja) | 2007-09-05 | 2009-03-26 | Renesas Technology Corp | 半導体装置 |
JP2013130454A (ja) | 2011-12-21 | 2013-07-04 | Toyota Motor Corp | 半導体温度センサおよびこれを備えた半導体装置 |
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