TWI239563B - A selective etch process for making a semiconductor device having a high-k gate dielectric - Google Patents
A selective etch process for making a semiconductor device having a high-k gate dielectric Download PDFInfo
- Publication number
- TWI239563B TWI239563B TW093125596A TW93125596A TWI239563B TW I239563 B TWI239563 B TW I239563B TW 093125596 A TW093125596 A TW 093125596A TW 93125596 A TW93125596 A TW 93125596A TW I239563 B TWI239563 B TW I239563B
- Authority
- TW
- Taiwan
- Prior art keywords
- gate dielectric
- dielectric layer
- semiconductor device
- manufacturing
- item
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000004065 semiconductor Substances 0.000 title claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 16
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 11
- 150000004820 halides Chemical class 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 8
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 7
- 238000005530 etching Methods 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 6
- 150000002367 halogens Chemical class 0.000 claims description 6
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 4
- 238000005229 chemical vapour deposition Methods 0.000 claims description 3
- 229910000449 hafnium oxide Inorganic materials 0.000 claims description 3
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims description 3
- 229910000042 hydrogen bromide Inorganic materials 0.000 claims description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 2
- XBMWKDXIXPBFGN-UHFFFAOYSA-N [Si+4].[O-2].[Cr+3] Chemical compound [Si+4].[O-2].[Cr+3] XBMWKDXIXPBFGN-UHFFFAOYSA-N 0.000 claims description 2
- 238000000277 atomic layer chemical vapour deposition Methods 0.000 claims description 2
- VKJLWXGJGDEGSO-UHFFFAOYSA-N barium(2+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[Ti+4].[Ba+2] VKJLWXGJGDEGSO-UHFFFAOYSA-N 0.000 claims description 2
- -1 giant oxide Chemical compound 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 2
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 claims 1
- SGSQNVKTDZZBGA-UHFFFAOYSA-N [O-2].[Ti+4].[Hf+4].[Ba+2].[O-2].[O-2].[O-2].[O-2] Chemical compound [O-2].[Ti+4].[Hf+4].[Ba+2].[O-2].[O-2].[O-2].[O-2] SGSQNVKTDZZBGA-UHFFFAOYSA-N 0.000 claims 1
- IZJSTXINDUKPRP-UHFFFAOYSA-N aluminum lead Chemical compound [Al].[Pb] IZJSTXINDUKPRP-UHFFFAOYSA-N 0.000 claims 1
- KUVFGOLWQIXGBP-UHFFFAOYSA-N hafnium(4+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[Ti+4].[Hf+4] KUVFGOLWQIXGBP-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 60
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000000151 deposition Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000673 Indium arsenide Inorganic materials 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000347 anisotropic wet etching Methods 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- VTGARNNDLOTBET-UHFFFAOYSA-N gallium antimonide Chemical compound [Sb]#[Ga] VTGARNNDLOTBET-UHFFFAOYSA-N 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- OZGWMIDURNBUND-UHFFFAOYSA-N lead rhenium Chemical compound [Re].[Pb] OZGWMIDURNBUND-UHFFFAOYSA-N 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012702 metal oxide precursor Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Electrodes Of Semiconductors (AREA)
Description
1239563 (1) 九、發明說明 【發明所屬之技術領域】 本發明係關於一種半導體裝置的製造方法,且更特別 的,係關於包括高k閘極介電層之半導體裝置的製造方法 【先前技術】 習知用以蝕刻高k閘極介電層的方法乃應用各向異个生 電漿蝕刻和各向異性濕蝕刻技術。如果乾蝕刻法以比蝕刻 基底顯著快的速率蝕刻基底,則這些乾蝕刻法可能會對位 在高k閘極介電層下的基底造成損壞。雖然濕蝕刻法可相 對於下層基底選擇性蝕刻介電層,但是,此方法亦會蝕刻 位在閘極電極下方的介電層,如此會使此構造變弱或升高 該構造。 因此,於此需要改善包括高k閘極介電層之半導體裝 置之製造方法。於此需要之方法爲其可相對於下層基底和 相對於閘極電極覆蓋的膜部份而選擇性蝕刻高k膜的曝露 部份。本發明正是可提供此種方法。 【發明內容】 本發明揭示一種半導體裝置的製造方法。該方法包含 形成一高k閘極介電層在一基底上’和調整高k閘極介電 層之第一部份以使其可相對於高k閛極介電層之第二部份 受到選擇性移除。 -5- 1239563 在下述說明中,所說明的許多細節旨在提供對於本發 明的充分瞭解。但是,對於熟悉此項技藝的人士而言,明 顯的’本發明可以其它非於此所述之方式實施。因此,本 發明不受下述說明之細節所限制。 【實施方式】 在本發明之方法中,一高k閘極介電層形成在一基底 上。該基底可包含一塊矽或矽上絕緣體構造。替代的,此 基底可包含其它材料,其可或不與砂結合,例如,鍺、銦 、銻化物、鉛化締、砷化銦、磷化銦、砷化鎵、或銻化鎵 。雖然於此說明可形成基底的範例材料,但是,任何可當 成基礎以供半導體裝置建立於其上之材料皆在本發明之精 神和範禱內。 高k閘極介電層包含介電常數大於二氧化矽之介電常 數之材料。較佳的,高k閘極介電層具有至少約二氧化矽 之介電常數兩倍的介電常數,亦即,大於8的介電常數。 用以形成局k閘極介電層之材料包括:氧化給、飴砂氧 化物、氧化鑭、氧化鉻、矽鉻氧化物、氧化鈦、氧化鉅, 鋇鋸鈦氧化物、鋇鈦氧化物、鋸鈦氧化物、氧化釔、氧化 鋁、和鉛銃鉅氧化物。其中特別佳的是氧化飴、氧化鉻、 氧化鈦、和氧化鋁。雖然於此說明可使用以形成高k閘極 介電層之數個材料例,但是,對於熟悉此項技藝的人士而 言,高k閘極介電層亦可以其它材料形成。 局k聞極介電層可使用習知沉積方法形成在基底上, - 6- (3) 1239563 習知方法例如習知化學蒸氣沉積(C V D )、低壓C V D、或 物理蒸氣沉積(PVD )法。較佳的,使用習知原子層CVD 法。在此方法中,一金屬氧化物先驅物(如金屬氯化物) 和蒸氣以所選擇的流速饋入C V D反應器中,而後C V D反 應器在所選擇的溫度和壓力下操作以在基底和高k閘極介 電層間產生一原子的平滑介面。CVD反應器可操作足夠 長時間以形成具有所需厚度的層。在大部份應用中,高k 閘極介電層需小於約4 0 A厚,且更佳的是,介於約5 A和 約2 Ο A厚,亦即,小於或等於約5單層厚。 當沉積時,高k閘極介電層可能會包括不需要的雜質 ,如殘留氯氣,其會造成該層和多晶矽的不相容。藉由沉 積一犧牲層在其表面,而後在犧牲層已吸收最初存在於高 k閘極介電層中之大部份雜質後移除犧牲層,可使高k閘 極介電層純化。替代的,藉由使高k閘極介電層還原至一 金屬層,而後再氧化該金屬層,亦可使高k閘極介電層純 化。較佳的,可經由例如濕或乾氧化法以增加高k閘極介 電層之氧含重。爲了確保和多晶砂基閘極電極相容,高k 閘極介電層亦可以其它方式調整,例如藉由添加氮,或設 置中間層在膜和閘極電極間。 在高k閘極介電層形成在基底上後,一閘極電極可形 成在該層上。在一較佳實施例中,閘極電極包含多晶矽。 此一閘極電極可藉由最初沉積多晶矽層】〇2在介電層I 〇】 和基底1 〇〇上而形成,如圖I a之構造所示。多晶矽層 】〇2可使用習知方法沉積,且其厚度最好在約5 0 0A和約 (4) 1239563 4〇〇〇A間。而後,多晶矽層102可受到蝕刻以曝露高k閘 極介電層10]之第一部份103,產生如圖lb之構造。 在蝕刻多晶矽層1 〇 2後,曝露的第一部份1 〇 3必須移 除。但是,在蝕刻第一部份I 〇3之前’本發明之方法調整 第一部份1 0 3,如圖1 c所示,以確保其可相對於高k閘 極介電層1 0 1之第二部份1 04受到選擇性移除。高k閘極 介電層101之第一部份103可藉由添加雜質至介電層之該 部份而調整。在一較佳實施例中’該雜質包含鹵素’其可 孕含在鹵素分子中或和氫結合以形成鹵化物。 亦可使用電漿增強化學蒸氣沉積(PECVD )法添加雜 質至高k閘極介電層101之第一部份103。在PECVD法 中,鹵素或鹵化物氣體(或此氣體之結合)可在衝擊電漿 前饋至反應器中。此反應器必須在適當條件下操作(例如 ,溫度、壓力、射頻、和功率)一段充足時間以調整高k 閘極介電層1 〇 1之第一部份1 03,以確保其可相對於其它 材料而可選擇性移除。在一較佳實施例中,使用一低功率 、例如小於2 0 0瓦的P E C V D法。 在一特別較佳實施例中,溴化氫(HBr)和氯氣(C】2 )乃以適當流速饋至反應器中以確保從這些氣體產生的電 漿會依需要調整高k閘極介電層1 0 1之第一部份]03。可 施加介於約50和1〇〇瓦晶圓偏壓(最好爲約100瓦)一 段充足時間以完成第一部份1 03之所需轉變。持續少於約 一分鐘、可能如5秒的短的電漿曝露可適當的引起此種轉 1239563 (5) 雖然於此說明用於調整高k閘極介電層]Ο 1之第一部 份1 03之數個範例方法,對於熟悉此項技藝之人士而言, 亦可使用其它處理。因此,使用以調整第一部份1 03的方 法並不限於上述之說明。本發明之方法可嘗試使用任何適 當的濕或乾化學處理,其添加雜質至高k閘極介電層1 0 1 之弟一部份1〇3以確保第一部份103可相對於高k閘極介 電層101之第二部份104而選擇性移除。 在第一部份1 03受到調整後,移除第一部份。添加雜 質之存在使第一部份1 0 3可相對於第二部份1 〇 4受到選擇 性移除、即蝕刻,以產生圖1 d所示的構造。在一較佳實 施例中,藉由使第一部份曝露至相當強的酸、例如鹵化物 基酸(如溴化氫或氫氯酸)或磷酸而移除。 當使用一鹵化物基酸時,此酸最好包含介於約0.5 % 至約1 0%重量百分比的HBr或HC1,且更佳的約爲5%重 量百分比。雖然可依需要使用較長的曝露時間,但是使用 此酸的蝕刻法可在或接近室溫下進行,且最好持續約5至 30分鐘。當使用磷酸時,磷酸最好包含介於約7 5 %至約 9 5 %重量百分比的 Η 3 Ρ Ο 4。使用磷酸之蝕刻法最好在約 ]40°C至約】80°C之溫度下進行,且更好爲約]60°C。對於 2 0 A厚的膜而言,當使用磷酸時,曝露步驟須持續約3 0 秒至約5分鐘,且最好約]分鐘。 雖然於此說明用於相對於第二部份1 0 4選擇性移除第 一部份】〇3之數個範例方法,對於熟悉此項技藝之人士而 言,亦可使用其它方法。本發明之方法可嘗試使用任何適 -9- (6) 1239563 當的處理以相對於高k閘極介電層]Ο 1之第二部份1 04而 選擇性移除高k閘極介電層1 0 1之第一部份1 〇 3。 對於熟悉此項技藝之人士而言,一般使用以完成半導 體裝置之其它步驟是已知的,因此,於此不再詳細說明。 雖然閘極電極最好包含多晶砂,其亦可以其它可使用高k 閘極介電之各種金屬形成。此外,閘極電極亦可包含多晶 矽和一或多個金屬或半金屬材料之結合。 如上所述,各向異性的調高k閘極介電層1 0 1之第一 部份1 03,以使相鄰構造不會受到處理步驟的影響,可確 保後續濕蝕刻處理不會蝕入下層基底或接鄰的第二部份。 結果,當使用此方法以蝕刻高k閘極介電層時,下層基底 不會遭受任何實質損害,且閘極電極不會被升高或下切至 一顯著程度。 雖然上述實施例是可使高k閘極介電層之第一部份相 對於高k閘極介電層之第二部份受到選擇性移除之方法範 例,但是,本發明並不限於這些特殊實施例。本發明可嘗 試其它轉變高k閘極介電層之部份以確保其選擇性移除的 方法,且確保該介電層蝕刻不會顯著損害下層基底或下切 該閘極電極。 本發明並不限於上述之實施例,且於此仍可達成各種 改變和修飾’但其仍屬本發明之精神和範疇。因此,本發 明之精神和範疇應由下述申請專利範圍界定之。 【圖式簡單說明】 - 10- (7) 1239563 圖1 a-1 d分別爲當實施本發明之方法之實施例時所形 成之構造的橫截面圖。 【主要元件符號說明】 1 00 :基底
1 0 1 :高k閘極介電層 1 0 2 :多晶矽層 1 0 3 :第一部份 104 :第二部份
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Claims (1)
1239563 ⑴ 十、申請專利範圍 1 · 一種半導體裝置的製造方法,包含: 形成一高k閘極介電層在一基底上;和 調整局k閘極介電層之第一部份以使其可相對於高k 閘極介電層之第二部份受到選擇性移除。 2 ·如申請專利範圍第1項的半導體裝置的製造方法 ’其中局k閘極介電層以原子層化學蒸氣沉積形成約5入 至40A厚,且包含選自以氧化飴、飴矽氧化物、氧化鑭 、氧化鍩、矽鉻氧化物、氧化鈦、氧化鉅,鋇緦鈦氧化物 、鋇鈦氧化物、緦鈦氧化物、氧化釔、氧化鋁、和鉛航鉅 氧化物所組成之群之一材料。 3 .如申請專利範圍第2項的半導體裝置的製造方法 ,進一步包含移除相對於高k閘極介電層之第二部份具有 選擇性的高k閘極介電層之第一部份。 4 ·如申請專利範圍第1項的半導體裝置的製造方法 ,其中高k閘極介電層藉由添加雜質至高k閘極介電層的 第一部份而調整。 5 ·如申請專利範圍第4項的半導體裝置的製造方法 ,其中該雜質包含鹵素。 6 .如申請專利範圍第4項的半導體裝置的製造方法 ,其中該雜質包含鹵化物。 7.如申請專利範圍第4項的半導體裝置的製造方法 ,其中使用電漿增強化學蒸氣沉積以添加雜質。 8 .如申請專利範圍第3項的半導體裝置的製造方法 -12- 1239563 (2) ,其中藉由曝露高k閘極介電層之第一部份至酸以選擇性 移除相對於® k閘極介電層之第二部份的高k閘極介電層 之第一部份。 9 ·如申請專利範圍第8項的半導體裝置的製造方法 ,其中該酸包含一鹵化物基酸。 10·如申請專利範圍第8項的半導體裝置的製造方法 ,其中該酸包含磷酸。 11. 一種半導體裝置的製造方法,包含: 形成一高k閘極介電層在一基底上; 形成一閘極電極在高k閘極介電層上; 蝕刻該閘極電極以曝露高k閘極介電層之第一部份; 添加雜質至高k閘極介電層之第一部份;和 選擇性移除相對於高k閘極介電層之第二部份的高k 閘極介電層之第一部份。 1 2 ·如申請專利範圍第I 1項的半導體裝置的製造方 法,其中該閘極電極包含多晶矽。 13·如申請專利範圍第1 1項的半導體裝置的製造方 法,其中該閘極電極爲一金屬閘極電極。 ]4 ·如申請專利範圍第1 1項的半導體裝置的製造方 法,其中使用低功率電漿增強化學蒸氣沉積法以添加包含 鹵素和鹵化物的雜質。 15·如申請專利範圍第1 1項的半導體裝置的製造方 法,其中藉由曝露高k閘極介電層之第一部份至酸以選擇 性移除相對於高k閘極介電層之第二部份的高k閘極介電 -13- 1239563 (3) 層之第一部份,該酸選自由鹵化物基酸和磷酸所組成之群 〇 16· —種半導體裝置的製造方法,包含: 形成一高k閘極介電層在一基底上; 形成一多晶矽基閘極電極在高k閘極介電層上; 蝕刻該多晶矽基閘極電極以曝露高k閘極介電層之第 一部份; 應用一電漿增強化學蒸氣沉積法以添加雜質至高k閘 極介電層之第一部份;和而後 將高k閘極介電層之第一部份曝露至酸,該酸選自由 鹵化物基酸和磷酸所組成之群。 1 7 .如申請專利範圍第1 6項的半導體裝置的製造方 法,其中該電漿增強化學蒸氣沉積法在小於約2 0 0瓦下執 行,和其中該雜質包含鹵素和鹵化物之混合物。 1 8 ·如申請專利範圍第】7項的半導體裝置的製造方 法,其中該酸包含氫溴酸和氫氯酸,和該雜質包含溴化氫 和氯氣的混合物。 ]9 .如申請專利範圍第1 8項的半導體裝置的製造方 法,其中該電發增強化學蒸氣沉積法執行少於約一分鐘。 20.如申請專利範圍第1 8項的半導體裝置的製造方 法,其中高k閘極介電層之第一部份在約爲室溫下曝露至 酸約5至3 0分鐘。
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2004
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TW200509244A (en) | 2005-03-01 |
WO2005024929A1 (en) | 2005-03-17 |
KR100716689B1 (ko) | 2007-05-09 |
KR20050021943A (ko) | 2005-03-07 |
CN1591786B (zh) | 2010-06-16 |
US20050048791A1 (en) | 2005-03-03 |
EP1511073A1 (en) | 2005-03-02 |
CN1591786A (zh) | 2005-03-09 |
US7037845B2 (en) | 2006-05-02 |
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