JP5132943B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5132943B2 JP5132943B2 JP2007013747A JP2007013747A JP5132943B2 JP 5132943 B2 JP5132943 B2 JP 5132943B2 JP 2007013747 A JP2007013747 A JP 2007013747A JP 2007013747 A JP2007013747 A JP 2007013747A JP 5132943 B2 JP5132943 B2 JP 5132943B2
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- 239000004065 semiconductor Substances 0.000 title claims description 101
- 239000000758 substrate Substances 0.000 claims description 30
- 239000010410 layer Substances 0.000 claims description 22
- 238000009792 diffusion process Methods 0.000 claims description 14
- 239000011229 interlayer Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 15
- 238000002955 isolation Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 229910021332 silicide Inorganic materials 0.000 description 7
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 7
- 229910052581 Si3N4 Inorganic materials 0.000 description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 229910003855 HfAlO Inorganic materials 0.000 description 1
- 229910004129 HfSiO Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002184 metal 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
- 238000004335 scaling law Methods 0.000 description 1
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Description
S.Ito, 他, "IEDM 2000",2000年, p.247
本発明の第1の実施形態について図面を参照して説明する。図1(a)及び(b)は第1の実施形態に係る半導体装置であり、(a)は平面構成を示し、(b)は(a)のIb−Ib線における断面構成を示している。図1に示すように、シリコン(Si)からなる半導体基板11の第1の領域11Aには、Nチャネル(N型)トランジスタである第1のMIS(金属−絶縁膜半導体)トランジスタ12Aが形成され、第2の領域11Bには、Pチャネル(P型)トランジスタである第2のMISトランジスタ12Bが形成されている。
以下に、本発明の第2の実施形態について図面を参照して説明する。図5は、第2の実施形態に係る半導体装置の断面構成を示している。図5において図1(b)と同一の構成要素には同一の符号を附すことにより説明を省略する。
11A 第1の領域
11B 第2の領域
12A 第1のMISトランジスタ
12B 第2のMISトランジスタ
13 素子分離領域
14A 第1の活性領域
14B 第2の活性領域
15A 第1のゲート絶縁膜
15B 第2のゲート絶縁膜
16A 第1のゲート電極
16B 第2のゲート電極
17A 第1のL型サイドウォール
17B 第2のL型サイドウォール
17a 第1の絶縁膜
18 外側サイドウォール
18a 第2の絶縁膜
19 I型サイドウォール
22A 第1のソースドレイン領域
22B 第2のソースドレイン領域
23A 第1のエクステンション拡散層
23B 第2のエクステンション拡散層
24 シリサイド層
25 ライナ絶縁膜
26 層間絶縁膜
27 コンタクトプラグ
Claims (17)
- 半導体基板に形成された、互いに導電型の異なる第1のMISトランジスタ及び第2のMISトランジスタと、前記第1のMISトランジスタ及び第2のMISトランジスタを覆い且つ前記第1のMISトランジスタのチャネル領域に前記第1のゲート電極のゲート長方向に応力を加えるライナ絶縁膜とを備え、
前記第1のMISトランジスタは、
前記半導体基板の第1の領域の上に形成された第1のゲート絶縁膜と、
前記第1のゲート絶縁膜の上に形成された第1のゲート電極と、
前記第1のゲート電極の側面上から前記半導体基板の上にわたって断面L字状に形成された第1のL型サイドウォールと、
前記第1の領域における前記第1のゲート電極及び第1のL型サイドウォールに覆われた部分の両側方に形成された第1のソースドレイン領域とを有し、
前記第2のMISトランジスタは、
前記半導体基板の第2の領域の上に形成された第2のゲート絶縁膜と、
前記第2のゲート絶縁膜の上に形成された第2のゲート電極と、
前記第2のゲート電極の側面上から前記半導体基板の上にわたって断面L字状に形成された第2のL型サイドウォールと、
前記第2のL型サイドウォールの上に形成された外側サイドウォールと、
前記第2の領域における前記第2のゲート電極、第2のL型サイドウォール及び外側サイドウォールに覆われた部分の両側方に形成された第2のソースドレイン領域とを有し、
前記第1のL型サイドウォールの上には前記外側サイドウォールは形成されておらず、
前記ライナ絶縁膜における前記第2のソースドレイン領域上に形成された部分の膜厚の最小値は、前記第1のソースドレイン領域上に形成された部分の膜厚の最小値よりも大きいことを特徴とする半導体装置。 - 前記ライナ絶縁膜における前記第1のソースドレイン領域上において膜厚が最小となる部分の上面は、前記第1のゲート電極の上面よりも低い位置にあり、
前記ライナ絶縁膜における前記第2のソースドレイン領域上において膜厚が最小となる部分の上面は、前記第2のゲート電極の上面よりも高い位置にあることを特徴とする請求項1に記載の半導体装置。 - 前記第2のソースドレイン領域を挟んで前記第2のゲート電極と反対側の領域に設けられた第2の凸部と、
前記第2の凸部の側面上に形成された前記第2のL型サイドウォール及び外側サイドウォールとをさらに備え、
前記ライナ絶縁膜は、前記第2の領域において前記外側サイドウォールの上を覆い且つ前記第2のゲート電極と前記第2の凸部との間に生じた凹部を埋め込むように形成されていることを特徴とする請求項1又は2に記載の半導体装置。 - 前記第2のゲート電極と前記第2の凸部との間隔は、前記第2のL型サイドウォールの膜厚と前記外側サイドウォールの膜厚と前記ライナ絶縁膜の膜厚の和の2倍以下であることを特徴とする請求項3に記載の半導体装置。
- 前記第2のMISトランジスタは複数形成されており、
前記第2の凸部は、一の前記第2のMISトランジスタと隣接して形成された他の前記第2のMISトランジスタにおける前記第2のゲート電極であることを特徴とする請求項3又は4に記載の半導体装置。 - 前記第2の凸部は、配線、ダミー配線及びダミー電極のうちの少なくとも1つであることを特徴とする請求項3又は4に記載の半導体装置。
- 前記第1のソースドレイン領域を挟んで前記第1のゲート電極と反対側の領域に設けられた第1の凸部と、
前記第1の凸部の側面上に形成された前記第1のL型サイドウォールとをさらに備え、
前記ライナ絶縁膜は、前記第1の領域において前記第1のL型サイドウォールに接して設けられ、且つ前記第1のゲート電極と前記第1の凸部との間に生じた凹部に沿って凹部を残存させるように形成されていることを特徴とする請求項3から6のいずれか1項に記載の半導体装置。 - 前記第1のゲート電極と前記第1の凸部との間隔は、前記第1のL型サイドウォールの膜厚と前記ライナ絶縁膜の膜厚の和の2倍よりも広いことを特徴とする請求項7に記載の半導体装置。
- 前記第1のMISトランジスタは複数形成されており、
前記第1の凸部は、一の前記第1のMISトランジスタと隣接して形成された他の前記第1のMISトランジスタにおける前記第1のゲート電極であることを特徴とする請求項7又は8に記載の半導体装置。 - 前記第1の凸部は、配線、ダミー配線及びダミー電極のうちの少なくとも1つであることを特徴とする請求項7又は8に記載の半導体装置。
- 前記第1のゲート電極と前記第1の凸部との間隔と、前記第2のゲート電極と前記第2の凸部との間隔とは互いに等しく、
前記第1のL型サイドウォールの膜厚と前記第2のL型サイドウォールの膜厚とは互いに等しいことを特徴とする請求項7から10のいずれか1項に記載の半導体装置。 - 前記各第1のMISトランジスタはN型のMISトランジスタであり、
前記各第2のMISトランジスタはP型のMISトランジスタであり、
前記ライナ絶縁膜は、前記第1のゲート電極のゲート長方向に引っ張り応力を加える膜であることを特徴とする請求項1から11のいずれか1項に記載の半導体装置。 - 前記半導体基板はシリコンからなり、
前記各第1のゲート電極及び各第2のゲート電極のゲート長方向は前記半導体基板の<100>軸方向に沿っていることを特徴とする請求項1から12のいずれか1項に記載の半導体装置。 - 前記各第1のMISトランジスタは、前記第1のゲート電極と前記第1のL型サイドウォールとの間に断面板状に形成された第1のI型サイドウォールを有し、
前記各第2のMISトランジスタは、前記第2のゲート電極と前記第2のL型サイドウォールとの間に断面板状に形成された第2のI型サイドウォールを有していることを特徴とする請求項1から13のいずれか1項に記載の半導体装置。 - 前記各第1のMISトランジスタは、前記第1の領域における前記第1のL型サイドウォールの下側の部分に形成された第1のエクステンション拡散層を有し、
前記各第2のMISトランジスタは、前記第2の領域における前記第2のL型サイドウォールの下側の部分に形成された第2のエクステンション拡散層を有していることを特徴とする請求項1から14のいずれか1項に記載の半導体装置。 - 前記ライナ絶縁膜の上に形成された層間絶縁膜と、
前記層間絶縁膜を貫通し、前記第1のソースドレイン領域及び第2のソースドレイン領域と電気的に接続されたコンタクトプラグとをさらに備えていることを特徴とする請求項1から15のいずれか1項に記載の半導体装置。 - 前記第1のMISトランジスタ及び前記第2のMISトランジスタは、スタティックランダムアクセスメモリを構成するトランジスタであることを特徴とする請求項1から16のいずれか1項に記載の半導体装置。
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