JP7114327B2 - 半導体装置及び半導体装置の製造方法 - Google Patents
半導体装置及び半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 79
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- 238000000034 method Methods 0.000 title description 22
- 239000010410 layer Substances 0.000 claims description 160
- 239000000758 substrate Substances 0.000 claims description 142
- 230000002093 peripheral effect Effects 0.000 claims description 25
- 239000011229 interlayer Substances 0.000 claims description 24
- 230000000149 penetrating effect Effects 0.000 claims description 24
- 239000012535 impurity Substances 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 21
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 11
- 239000012774 insulation material Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 11
- 238000002955 isolation Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 229920005591 polysilicon Polymers 0.000 description 9
- 238000005530 etching Methods 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- 229910052814 silicon oxide Inorganic materials 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910021332 silicide Inorganic materials 0.000 description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000000231 atomic layer deposition Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 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
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- IVHJCRXBQPGLOV-UHFFFAOYSA-N azanylidynetungsten Chemical compound [W]#N IVHJCRXBQPGLOV-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Description
LW 下部配線構造
LC1~LC3 下部コンタクト
LM0~LM2 下部配線ライン
HW 上部配線構造
HC1~HC3 上部コンタクト
HM0~HM2 上部配線ライン
101 第1基板
105 不純物領域
120 回路素子
122 回路ゲート誘電層
124 スペーサ層
125 回路ゲート電極層
150 コンタクトプラグ
190 周辺領域絶縁層
201 第2基板
210 エピタキシャル層
220 層間絶縁層
230 ゲート電極
240 チャネル領域
245 ゲート誘電層
250 チャネル絶縁層
255 チャネルパッド
260 貫通絶縁領域
265 配線領域
270 マスク層
280 犠牲層
292、294 セル領域絶縁層
Claims (23)
- 第1基板上に設けられ、回路素子、及び前記第1基板上において垂直に延在されるコンタクトプラグを含む周辺回路領域と、
前記第1基板の上部に配置される第2基板上に設けられ、メモリセルを含むメモリセル領域と、
前記第2基板を貫通する貫通絶縁領域であり、当該貫通絶縁領域は絶縁材料からなり且つ前記コンタクトプラグの上面全体と接触している、貫通絶縁領域と、を含み、
前記コンタクトプラグは、前記第1基板を前記貫通絶縁領域と直接接続している、
半導体装置。 - 前記コンタクトプラグは、前記貫通絶縁領域により前記第2基板から電気的に分離される、請求項1に記載の半導体装置。
- 前記メモリセル領域は、
前記第2基板上において垂直に互いに離隔して積層されるゲート電極と、
前記ゲート電極を貫通し、前記第2基板上において垂直に延在されるチャネルと、を含み、
前記貫通絶縁領域は、前記ゲート電極の少なくとも一部を貫通して延在される、請求項1又は2に記載の半導体装置。 - 前記貫通絶縁領域は、前記ゲート電極のエッジ(edge)領域に配置される、請求項3に記載の半導体装置。
- 前記ゲート電極は、少なくとも一方向に沿って下部の前記ゲート電極が上部の前記ゲート電極より長く延在されるコンタクト領域を提供し、
前記貫通絶縁領域は、前記コンタクト領域の少なくとも一部を貫通する、請求項3に記載の半導体装置。 - 前記チャネルの外側に、前記ゲート電極を貫通し、前記第2基板上において垂直に延在されるダミーチャネルをさらに含み、
前記貫通絶縁領域は、前記ダミーチャネルの一部を貫通する、請求項3に記載の半導体装置。 - 前記第2基板を貫通するように配置され、前記メモリセル領域と前記周辺回路領域の前記回路素子を電気的に連結する配線構造を含む配線領域をさらに含む、請求項1乃至6のいずれか一項に記載の半導体装置。
- 前記貫通絶縁領域及び前記配線領域は、同一の深さを有する、請求項7に記載の半導体装置。
- 前記配線構造は、前記第1基板上において垂直に延在される導電性プラグを含む、請求項7又は8に記載の半導体装置。
- 前記第1基板は不純物を含む第1ウェル領域を含み、前記第2基板は不純物を含む第2ウェル領域を含み、
前記コンタクトプラグは、前記第1ウェル領域から前記第2ウェル領域に延在される、請求項1乃至9のいずれか一項に記載の半導体装置。 - 前記第1及び第2ウェル領域は、同一の導電型の不純物を含む、請求項10に記載の半導体装置。
- 前記コンタクトプラグは、複数個が列をなして配置される、請求項1乃至11のいずれか一項に記載の半導体装置。
- 前記コンタクトプラグは、多結晶シリコンからなる、請求項1乃至12のいずれか一項に記載の半導体装置。
- 前記貫通絶縁領域は、互いに離隔して複数個配置される、請求項1乃至13のいずれか一項に記載の半導体装置。
- 第1基板上に設けられ、前記第1基板において垂直に延在されるコンタクトプラグを含む第1領域と、
前記第1基板の上部に配置される第2基板上に設けられ、前記第2基板上において垂直に延在されるチャネルを含む第2領域と、
前記第2基板を貫通して前記コンタクトプラグの上面全体と接触する貫通絶縁領域と、を含み、
前記コンタクトプラグは、前記第1基板を前記貫通絶縁領域と直接接続している、
半導体装置。 - 前記貫通絶縁領域は、前記チャネルより高い高さを有する、請求項15に記載の半導体装置。
- 前記貫通絶縁領域は、上面より狭い下面を有する、請求項15又は16に記載の半導体装置。
- 第1基板上に周辺回路をなす回路素子を形成する段階と、
前記第1基板上において垂直に延在される少なくとも一つのコンタクトプラグを形成する段階と、
前記少なくとも一つのコンタクトプラグと連結される第2基板を形成する段階と、
前記第2基板上に犠牲層及び層間絶縁層を交互に積層する段階と、
前記犠牲層及び前記層間絶縁層を貫通するチャネルを形成する段階と、
前記第2基板を貫通し、前記コンタクトプラグの上面全体と接触する貫通絶縁領域を形成する段階と、
前記犠牲層を除去し、前記犠牲層が除去された領域にゲート電極を形成する段階と、を含み、
前記コンタクトプラグは、前記第1基板を前記貫通絶縁領域と直接接続し、前記貫通絶縁領域内に配線構造は形成されない、
半導体装置の製造方法。 - 前記貫通絶縁領域を形成する段階は、前記チャネルを形成する段階以後に行われる、請求項18に記載の半導体装置の製造方法。
- 前記貫通絶縁領域を形成する段階は、
前記犠牲層、前記層間絶縁層、及び前記第2基板を貫通する開口部を形成する段階と、
前記開口部に絶縁物質を充填する段階と、を含む、請求項18又は19に記載の半導体装置の製造方法。 - 前記開口部により、前記少なくとも一つのコンタクトプラグと前記第2基板とが分離される、請求項20に記載の半導体装置の製造方法。
- 前記第2基板を貫通する配線領域を形成する段階をさらに含み、
前記配線領域を形成するための配線領域の開口部が、前記貫通絶縁領域を形成するための前記開口部とともに形成される、請求項20に記載の半導体装置の製造方法。 - 前記配線領域内に導電性プラグを形成する段階をさらに含む、請求項22に記載の半導体装置の製造方法。
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