TW550715B - Method for manufacturing a microelectronic device and device manufacturing in accordance with said method - Google Patents
Method for manufacturing a microelectronic device and device manufacturing in accordance with said method Download PDFInfo
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- TW550715B TW550715B TW090131716A TW90131716A TW550715B TW 550715 B TW550715 B TW 550715B TW 090131716 A TW090131716 A TW 090131716A TW 90131716 A TW90131716 A TW 90131716A TW 550715 B TW550715 B TW 550715B
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Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000004377 microelectronic Methods 0.000 title claims description 9
- 239000004065 semiconductor Substances 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 37
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims abstract description 26
- 239000010410 layer Substances 0.000 claims description 178
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 35
- 229910052737 gold Inorganic materials 0.000 claims description 35
- 239000010931 gold Substances 0.000 claims description 35
- 230000004888 barrier function Effects 0.000 claims description 29
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 claims description 23
- 238000009792 diffusion process Methods 0.000 claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 20
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 20
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 13
- 229910052719 titanium Inorganic materials 0.000 claims description 13
- 239000010936 titanium Substances 0.000 claims description 13
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 229910052697 platinum Inorganic materials 0.000 claims description 10
- 239000011241 protective layer Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 6
- 230000002079 cooperative effect Effects 0.000 claims description 5
- 230000008021 deposition Effects 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 238000005275 alloying Methods 0.000 claims description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 claims 1
- 150000004767 nitrides Chemical class 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 5
- -1 GaAs compound Chemical class 0.000 abstract description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 230000006798 recombination Effects 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- BYDQGSVXQDOSJJ-UHFFFAOYSA-N [Ge].[Au] Chemical compound [Ge].[Au] BYDQGSVXQDOSJJ-UHFFFAOYSA-N 0.000 description 2
- JQBPGTQXACIVED-UHFFFAOYSA-N [N].[W].[Ti] Chemical compound [N].[W].[Ti] JQBPGTQXACIVED-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- DFJQEGUNXWZVAH-UHFFFAOYSA-N bis($l^{2}-silanylidene)titanium Chemical compound [Si]=[Ti]=[Si] DFJQEGUNXWZVAH-UHFFFAOYSA-N 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910021352 titanium disilicide Inorganic materials 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229920002101 Chitin Polymers 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- WIGAYVXYNSVZAV-UHFFFAOYSA-N ac1lavbc Chemical compound [W].[W] WIGAYVXYNSVZAV-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000007789 gas Substances 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
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 235000015067 sauces Nutrition 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28575—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising AIIIBV compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/11—Manufacturing methods
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
- H01L29/452—Ohmic electrodes on AIII-BV compounds
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/05001—Internal layers
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/05001—Internal layers
- H01L2224/0502—Disposition
- H01L2224/05026—Disposition the internal layer being disposed in a recess of the surface
- H01L2224/05027—Disposition the internal layer being disposed in a recess of the surface the internal layer extending out of an opening
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/05001—Internal layers
- H01L2224/05075—Plural internal layers
- H01L2224/0508—Plural internal layers being stacked
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- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/0554—External layer
- H01L2224/0556—Disposition
- H01L2224/05571—Disposition the external layer being disposed in a recess of the surface
- H01L2224/05572—Disposition the external layer being disposed in a recess of the surface the external layer extending out of an opening
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- H—ELECTRICITY
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- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
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- H01L24/03—Manufacturing methods
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- H—ELECTRICITY
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/02—Bonding areas ; Manufacturing methods related thereto
- H01L24/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L24/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
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- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L24/13—Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
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- H—ELECTRICITY
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1203—Rectifying Diode
- H01L2924/12032—Schottky diode
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1305—Bipolar Junction Transistor [BJT]
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- H—ELECTRICITY
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- H01L2924/10—Details of semiconductor or other solid state devices to be connected
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- H01L2924/14—Integrated circuits
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Bipolar Transistors (AREA)
- Electrodes Of Semiconductors (AREA)
Description
550715 A7 B7 五、發明説明(1 ) 本發明關於一種製造微電子裝置的方法,及其所製造 的微電子裝置,該裝置具有至少一鎵砷化物(G a A S ) 合成半導體材料之電極。 爲製造半導體材料之半導體裝置的電極與基底及/或 外部電路裝置的其他裝置間的電連接,便在半導體材料上 製造一個電傳導接點,其中該接點包栝至少一金屬低阻抗 傳導層。然而,該接點的設計高度取決於接點的類型(歐 姆式/蕭特基式/電谷式)、裝置的類型(雙極式/場效 電晶體式)、半導體材料(砂/鎵氮(G a N) /鎵/… )及摻料的類型(p / η )與密度。意即,依據所採用該 些參數的個別組合,而進行不同的接點設計,而以某些設 計所達到的優點,通常不能轉移至其他參數的組合設計。 例如,李(Lee )等人於2 0 0 0年4月2 4日所提出 之「對於η型鎵氮之鈦/鋁/鉑/金歐姆接點的長期熱穩 定」物理專利,第17卷、第17冊,其中2364至 2 3 6 6頁補充說明,具有鋁與金間之鉑層的η型鎵氮半 導體材料,其歐姆接點之慣用的鈦一鋁一金層序列。此係 希望降低所觀察到接點歐姆阻抗增加之形式的惡化。 「ΕΡ 〇 402 061」描述以金作爲矽基底 上低阻抗傳導層的鈦鎢/鈦鎢氮/鈦鎢/金層序列,其中 鈦鎢/鈦鎢氮/鈦鎢層序列作爲附著層,而屏障則沈積於 鈍態層的窗口上。爲達到二氧化矽鈍態層窗口的低接點阻 抗,由1 9 8 3年5月1 2日I Β Μ技術發表期干ί]( Technical Disclosure Bulletin),第 2 5 卷、第 1 2 冊,「 -----^- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) (請先閱讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 550715 A7 __ B7 五、發明説明(2) (請先閱讀背面之注意事項再填寫本頁) 接點冶金的新結構」6 3 9 8至6 3 9 9頁得知,在η +型 矽半導體區上蒸汽沈積鈦氮薄膜,以及藉由高溫程序,在 半導體界線上製造二矽化鈦層,其中作爲擴散屏障且鋁沈 積其上作爲傳導層的鈦氮層,在二矽化鈦層上生成。 在合成的半導體群組中,由於鎵砷化物技術的高電荷 移動率及與其相關裝置的高限制頻率,所以其特別普遍。 此類裝置特別是用於高頻交換電路,例如功率放大器、振 盪器、混波交換竃路,以及個別裝置。接點典型地由數層 組成,並包括金傳導層,其係藉由擴散屏障層及附著層, 而由基底分割而來。金傳導層的特點,特別是高傳導性及 不受侵蝕。 接點的結構可以是例如藉由剝落(lift-off )程序,而 在半導體表面上生成,其中接點的表面結構是藉由浮雕( undercut)而不在光阻層中蝕刻,而接點的層序列,則於之 後沈積。包括光阻遮罩上的附著層、屏障層及傳導層(金 )之整個層序列的沈積,不單是具成本效益,而且確保接 點連續層的自我校準沈積。 經濟部智慧財產局員工消費合作社印製 然而,依據本慣用法所製造的鎵砷化物裝置,不利地 具有惡化性能數據之不合格的長期表現,例如,在增益形 式方面,在異質接面合雙極電晶體中明顯的全面惡化。 在1 9 8 5年1 2月7日I B Μ技術發表期刊( Technical Disclosure Bulletin),第 28 卷、第 7 冊,「鎵 砷化物的金鎳鍺接點」3 1 8 3至3 1 8 4頁中揭露,藉 由合金處理,鎳/金鍺/鎳/金層序列,在鎵砷化物半導 ------g___ 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 550715 A7 _B7____ 五、發明説明(3) 體表面上,生成低接點阻抗之N i 2 G e A s / A u 3 G a 層序列的程序。
It0等人於1 9 8 4年8月8日日本應用物理期刊( Japanese Journal of Applied Physics),第 2 3 卷、第 8 冊 ,「η型鎵砷化物之鋁鎵砷化物異質接面合雙極電晶體的 極低阻抗歐姆接點」,L 6 3 5至L 6 3 7頁中說明製造 η型鎵砷化物接點的方法。在此方法中,金鍺/鎳/鈦/ 金多層結構進行低溫合金處理,其中在約3 7 0 t的溫度 ,達成最低的接點阻抗。
Stareev在1 9 9 3年5月3 1日應用物理專利C 6 2 (22)) ,「p型鎵砷化物之極低阻抗鈦/鉑/金歐姆 接點的形成」,2 8 0 1至2 8 0 3頁中說明,製造p型 鎵砷化物接點的方法。在此方法中,鎵砷化物表面於準備 步驟,藉由離子爆炸加以淸理,接著在鈦/鉑/金層序列 沈積成爲非合金接點之前,歷經校正溫度步驟。 本發明旨在揭露以至少一鎵砷化物合成半導體材料之 電極’製造微電子裝置的方法,及其所製造的微電子裝置 ;該材料使得可製造具穩定長期成本效益特性的裝置。 依據本發明,目標是達成具個別申請專利範圍中所揭 露的特性。相依申請專利範圍定義有利的實施例,及本發 明的其餘發展。 若鎵砷化物合成半導體材料之接點中的傳導層完全或 至少大部分由鋁組成,而非鎵砷化物接點所慣用之傳導層 材料的金,那麼便容易地以具成本效益的方式,製造出具 本紙張尺度適用中—家縣(CNS )八4規格(21Gx297公酱) 6 -- (請先閱讀背面之注意事項再填寫本頁} 裝·
、1T 經濟部智慧財產局員工消費合作社印製 550715 經濟部智慧財產局員工消費合作社印製 A7 ____ B7_____五、發明説明(4) 長期裝置特性穩定的低阻抗接點,該特性特別是指異質接 面雙極電晶體(Η B T )的增益。接點可有利地藉由剝落 程序來製造。 本發明所依據的想法是,當藉由剝落程序而沈積具有 例如金傳導層,及該傳導層之下的屏障層的接點時,該接 點各層的厚度,由於沈積於光阻遮罩上而變薄,趨向於接 點的邊緣,其中該遮罩的結構是藉由在剝落程序中浮雕而 定。意即,傳統鎵砷化物接點邊緣之屏障層的擴散屏障效 果惡化,而金的低阻抗傳導層可擴散至半導體基底的電極 區。在此例中,金擴散至例如鎵砷化物半導體材料的摻碳 型電極區,依據鎵砷化物技術完成之異質接面雙極電晶體 的基本電極,可能因爲金作爲半導體中的雜質,而使得基 本電極中增加的電荷進行重組。此使得增益惡化。 當鋁作‘爲鎵砷化物合成半導體材料中,電極接點之傳 導層的材料時,該等裝置特性的惡化不會發生。因此,本 發明亦可有利地用於製造依據鎵砷化物技術完成之異質接 面雙極電晶體的基本電極。該裝置可形成部分的龐雜積體 電路。 在本技藝的情況中,接點的傳導層一詞,表示接點層 序列的層,由於其材料及相當的層厚度,提供接點的傳導 値,以傳輸平行於基底表面的電流。可能發生的擴散,自 傳導層進入電極,並未如金在摻碳型鎵砷化物電極中般的 ,引發重組中心的形成。在一較佳的實施例中,擴散屏障 層因而可完全省略。附著層可補償半導體材料及傳導層間 本紙張尺度適用中國國家標準( CNS ) Α4規格(210X297公釐) ? ' (請先閱讀背面之注意事項再填、寫本頁} 裝. -訂 線 550715 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明(5) 的機械張力,確保該層附著於半導體材料上,以及特別是 減少傳導層材料及基底間接點的潛在屏障,附著層常沈積 方 < 基底上,作爲接點的第一層。附著層較佳地明顯包括一 或多項的鈦 '鉑、鉬、鎳、鈀,特別是鈦。附著層的厚度 相較於傳導層的厚度爲小,較佳的不大於5 〇奈米。由於 使用欽,且傳導層與半導體材料間附著層的薄厚度,垂直 於各層的歐姆阻抗極小。 避免鋁腐蝕的保護層,較佳地在剝落程序的過程中沈 積在錦的傳導層上。保護層較佳地明顯包括一或多項的鈦 、鎳、鉑,而且較佳地類似於附著層及傳導層,特別是緊 接者藉由蒸汽沈積而沈積。當使用鈦作爲較佳的附著層材 料時,其特別是不再需要藉由離子爆炸,而準備半導體表 面。在依據本發明的方法中,亦不進行合金步驟。因此, 本發明揭露一種簡單且具成本效益的製造接點的方法。 若在傳導層中不可避免的使用金,例如由於個別的技 術狀況,那麼依據本發明的一個有利的變化,其可能沈積 一*個具包含金之傳導層、分離傳導層與半導體材料的擴散 屏障層及附著層(若合適的話)的傳統層序列,該附著層 位於表面大於接點結構的半導體材料上,特別是位於該半 導體的整個表面上’其並可能以結構的方式,藉蝕刻大表 面層序列而產生接點。在此例中,在接點內可獲致具可靠 屏障效果的均勻屏障層,防止金擴散進入半導體材料。 在本發明另一個有利的變化中,一個具傳導層的接點 在接點層序列沈積之前,藉將絕緣層沈積於半導體材料之 本紙張尺度適用中國國家標準(CNS ) A4規格(21〇x297公釐) 訂 線 (請先閱讀背面之注意事項再填寫本頁) 550715 A7 _ __B7_ 五、發明説明(6 ) 上而形成,該傳導層包括金及擴散屏障層,而該絕緣層則 較佳地包括矽氮化物;其中在電極上方的絕緣層中產生一 接點窗口。該接點的慣用層序列,例如附著層、屏障層及 金傳導層的形式,可於之後依據傳統剝落技術而完成,其 中該接點的結構覆蓋接點窗口的邊緣,如此一來,使得接 點結構邊緣的層厚度,在具有置於絕緣層上之浮雕遮罩的 沈積中變薄,該絕緣層亦作爲擴散屏障。意即,金不可能 經由絕緣層,或經由接點窗口中的屏障層,而擴散至半導 體材料。 下列將參考以附圖描繪之有利的實施例,進行更詳細 的說明。附圖顯示: 圖1,傳統設計的截面圖; 圖2,具不含金之傳導層的接點層序列的截面圖; 圖3,具蝕刻背層序列之接點的截面圖; 圖4,覆蓋接點窗口之接點的截面圖。 符號說明 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 1 半 導 體 層 2 、 2 1 、2 2 附 著 層 3 > 3 1 、3 2 擴 散 屏 障 層 4 5、 4 1 、4 2 傳 導 層 6 腐 蝕 保 護 層 1 0 絕 緣 層 P L 光 阻 遮 罩 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 550715 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS ) Μ規格(210X297公釐) A7 B7 五、發明説明(7) Μ 〇 遮罩開口 R Β 邊界區 Κ F 接點窗口 圖1顯示接點慣用設計的截面圖,其中包含附著層2 、擴散屏障層3及低阻抗的金傳導層4的金屬層序列,沈 積於半導體層1之上,例如包含合成半導體材料之異質接 面合雙極電晶體的摻碳型基本層,特別是依據鎵砷化物技 術而完成。表面之金屬層序列2 - 4的結構,依據剝落技 術而發生,即藉由光阻遮罩P L的協助,遮罩開口 μ〇經 由浮雕而朝向半導體層1變寬。層序列2 - 4係以單一遮 罩進行蒸汽沈積而完成。在沈積層序列後,變將光阻遮罩 及其上所沈積的金屬移除。所沈積的各層在邊界區r Β中 變薄,該區在遮罩開口 Μ〇的垂直投影下延伸,使得該區 之屏障層3的擴散屏障效果減弱,甚至若邊緣發展的不規 則,該效果在某些位置可能不存在。意即金可自傳導層4 擴散進入半導體層1 ,並形成其中的重組中心。由於增強 的電荷重組,該些重組中心使得半導體裝置的特性數據惡 化,例如雙極電晶體的增益。 . 在圖2所顯示的接點中,其亦依據可靠且具成本效益 的剝落技術而完成,半導體層1上設計的是不同的層序列 ,包括附著層2、完全或至少大部分由鋁組成且不含金的 傳導層5、腐蝕保護層6。傳導鋁層5及半導體層1間的 擴散屏障層並不需要而且最好不要,因爲鋁並不像金在某 4Θ- (請先閱讀背面之注意事項再填寫本頁)
55〇715 A7 B7 五、發明説明(8) 程度上會擴散進入半導體層,所以不會引發相同的惡化效 果。藉由限制擴散至邊界區,額外的擴散屏障層可進一步 减少鋁擴散進入半導體層到一定的程度。由於鋁的卓越傳 導性,與較附著層2爲大之傳導層5的厚度,可確保平行 於各層的咼傳導値。保護層6避免傳導層5的錦在含氧氣 體中氧化,因而使得可舒適地掌控其餘製造程序中的設計 。保護層包括例如,鈦、鎳、鉑或其他保護鋁免於腐蝕的 材料。附著層確保層序列在半導體層1上的卓越機械性附 著’以及垂直於各層平面之低接點阻抗,並可包括例如, 鈦、鉑、鉬、鎳、鈀,特別是鈦。 圖3截面圖中所顯示的接點,可包括例如依據圖1之 接點的相同層序列,並特別包括擴散屏障層3 1及附著層 2 1上的金傳導層4 1。層序列佈滿半導體層的整個表面 (如虛線所示),並經蝕刻使用光阻遮罩的半導體層而形 成結構。由於層序列沈積於整個表面,終極結構接點中的 屏障層3 1具有均勻的層厚度,有效地避免金擴散進入半 導體層1。 當製造圖4中所示,亦包含半導體層1上之金傳導層 4 2的接點時,較佳地包含矽氮化物S i 3 N 4的絕緣層 1 0便開始沈積,其中接點窗口 K F被置於該絕緣層中, 例如藉由具鈾刻遮罩的乾式化學蝕刻。接著’包含附著層 2 2、擴散屏障層3 2及低阻抗金傳導層4 2的金屬層序 列,傳統地依據剝落技術而加以沈積’其中用於剝落程序 之光阻遮罩的結構及該些蝕刻遮罩’加以調整以適於彼此 _____Μ- 本紙張尺度適用中國國家標準(CNS ) Α4規格(210Χ297公釐) (請先閲讀背面之注意事項再填寫本頁)
-、1T 經濟部智慧財產局員工消費合作社印製 550715 A7 B7 五、發明説明(9) ,如此一來,接點結構便可確實地覆蓋接點窗口 K F的邊 緣。由於該些措施,具有位於絕緣層1 〇上之較薄各層的 接點的邊界區,並與接點窗口區隔。接著,在金屬層序歹[] 的邊界區之下,便可確實避免金經屏障層3 2而擴散至半 導體層。由於屏障層的均勻厚度,可避免接點窗口上方的 擴散。 上述及申請專利範圍中所揭露的特性,以及附圖中可 確定的特性,可有利地個別或以不同組合加以完成。本發 明並不侷限於所說明的實施例。相反地,本發明可在熟悉 本技藝人士的專業知識範圍內,以不同的方式加以修改。 (請先閱讀背面之注意事項再填寫本頁) -裝·
、1T 線 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS ) Μ規格(210Χ297公釐)
Claims (1)
- 經濟部智慧財產局員工消費合作社印製 六、申請專利範圍 附件二第90 I 3 I 7 I 6號專利申請案 中文申請專利範圍替換本 民國92年1月27日修正 1 · 一種製造微電子裝置的方法,該裝置具有一鎵砷 化物(G a A s )合成半導體材料的電極,及在面對該電 極之半導體材料上的至少一低阻抗金屬接點,其中該接點 包括數種不同餍及一低阻抗傳導層,而且其中至少大部分 ,甚或特別的完全由鋁組成的一層,沈積作爲低阻抗傳導 層。 2 ·如申請專利範圍第1項之方法,特色在於該接點 是藉由剝落程序所製造。 3 ·如申請專利範圍第1項之方法,特色在於在傳導 層的頂端上沈積一防止氧化保護層。 4 ·如申請專利範圍第3項之方法,特色在於該保護 層明顯地至少包括一或更多項鈦、鎳、鉑等物質。 5 ·如申請專利範圍第1項之方法,特色在於並無擴 散屏障層沈積於傳導層及基底之間。 6 .如申請專利範圍第1項之方法,特色在於附著層 沈積作爲第一層。 7 .如申請專利範圍第6項之方法,特色在於該附著 層明顯地至少包括一或更多項鈦、鉑、鉬、鎳、鈀等元素 0 8 .如申請專利範圍第6項之方法,特色在於包括附 著層、傳導層及保護層之層序列的各層,特別是緊接著進 本紙張尺度適用肀國國家標準(CNS ) A4現格(210X 297公釐) .裝 訂 ^ (請先閱讀背面之注意事項再填寫本頁) 550715 8 8 8 8 ABCD 經濟部智慧財產局員工消費合作社印製 六、申請專利範圍 行蒸汽沈積。 9 ·如申請專利範圍第1項之方法,特色在於傳導層 (若合適的話)、附著層及保護層,並不進行合金程序。 1 0 ·如申請專利範圍第1項之方法,特色在於半導 體材料包括鎵砷化物(G a A s )材料。 1 1 ·如申請專利範圍第1至第1 〇項之任一項的方 法’特色在於該裝置是異質接面合雙極電晶體。 1 2 · —種製造微電子裝置的方法,該裝置具有一合 成半導體材料的電極,及在面對該電極之半導體材料上的 至少一低阻抗金屬接點,其中該接點依據剝落技術而完成 ’包括一低阻抗含金傳導層,及置於該傳導層及半導體材 料間的擴散屏障層,特色在於一絕緣層在該接點的層序列 沈積於半導體材料上之前,便進行沈積,而且其中該接點 在該絕緣層窗口下延伸。 1 3 ·如申請專利範圍第1 2項之方法,特色在於一 氮化物沈積作爲絕緣層。 1 4 · 一種製造微電子裝置的方法,該裝置具有一合 成半導體材料的電極,及在面對該電極之半導體材料上的 一低阻抗金屬接點,其中該接點包括一含金傳導層,及置 於該傳導層及半導體材料間的擴散屏障層,特色在於進行 該接點層序列的大表面沈積,而且其中該接點是以結構的 方式’藉向後蝕刻該層序列而產生。 1 5 · —種依據申請專利範圍第1項之方法所製造的 微電子裝置,其包含一接點,其在一鎵砷化物(G a A s 本紙張尺度適用中國國家標準(CNS ) A4規格(210 xm公釐) ---------^------IT------φ (請先閱讀背面之注意事項再填寫本頁) 550715 A8 B8 C8 D8 六、申請專利範圍 )合成半導體上,具有一附著層、一傳導層及一保護層, 其中該傳導層完全或至少大部分由鋁組成。 1 6 ·如申請專利範圍第1 5項之裝置,其特徵在於 該附著層、傳導層及保護層的層厚度朝向邊緣減少。 ---------^------1T------^ (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本纸張尺度適用中國國家標隼(CNS > Μ規格(210 X 297公釐) -3-
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DE10064479A DE10064479A1 (de) | 2000-12-22 | 2000-12-22 | Verfahren zur Herstellung eines mikroelektronischen Bauelements |
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EP (1) | EP1346403A2 (zh) |
CN (1) | CN1222984C (zh) |
DE (1) | DE10064479A1 (zh) |
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DE2543518A1 (de) * | 1975-09-30 | 1977-04-07 | Licentia Gmbh | Halbleiterbauelement mit einem mehrschichtigen ohmschen anschlusskontakt |
JPS57183071A (en) * | 1981-05-06 | 1982-11-11 | Nec Corp | Formation of recess type fine multi-layer gate electrode |
JPS60123026A (ja) * | 1983-12-08 | 1985-07-01 | Toshiba Corp | 半導体装置の製造方法 |
JPH0722141B2 (ja) * | 1984-03-07 | 1995-03-08 | 住友電気工業株式会社 | 半導体素子の製造方法 |
JPS6298768A (ja) * | 1985-10-25 | 1987-05-08 | Nec Corp | 半導体素子用電極 |
US4994892A (en) * | 1986-10-09 | 1991-02-19 | Mcdonnell Douglas Corporation | Aluminum germanium ohmic contacts to gallium arsenide |
WO1989004057A1 (en) * | 1987-10-20 | 1989-05-05 | Bell Communications Research, Inc. | Epitaxial intermetallic contact for compound semiconductors |
US5849630A (en) * | 1989-03-29 | 1998-12-15 | Vitesse Semiconductor Corporation | Process for forming ohmic contact for III-V semiconductor devices |
JP2661333B2 (ja) * | 1989-06-05 | 1997-10-08 | モトローラ・インコーポレーテツド | 金属被覆化プロセス処理方法 |
FR2697945B1 (fr) * | 1992-11-06 | 1995-01-06 | Thomson Csf | Procédé de gravure d'une hétérostructure de matériaux du groupe III-V. |
JP2606581B2 (ja) * | 1994-05-18 | 1997-05-07 | 日本電気株式会社 | 電界効果トランジスタ及びその製造方法 |
JPH0945635A (ja) * | 1995-07-27 | 1997-02-14 | Mitsubishi Electric Corp | 半導体装置の製造方法,及び半導体装置 |
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CN1222984C (zh) | 2005-10-12 |
CN1481579A (zh) | 2004-03-10 |
WO2002052626A3 (de) | 2003-02-13 |
EP1346403A2 (de) | 2003-09-24 |
DE10064479A1 (de) | 2002-07-04 |
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