TWI512893B - 用於鑲嵌式圖案化之avd硬遮罩 - Google Patents
用於鑲嵌式圖案化之avd硬遮罩 Download PDFInfo
- Publication number
- TWI512893B TWI512893B TW101148340A TW101148340A TWI512893B TW I512893 B TWI512893 B TW I512893B TW 101148340 A TW101148340 A TW 101148340A TW 101148340 A TW101148340 A TW 101148340A TW I512893 B TWI512893 B TW I512893B
- Authority
- TW
- Taiwan
- Prior art keywords
- forming
- hard mask
- dielectric layer
- trench
- integrated circuit
- Prior art date
Links
- 238000000059 patterning Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 29
- 239000003989 dielectric material Substances 0.000 claims description 20
- 239000004020 conductor Substances 0.000 claims description 12
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 10
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 3
- ONLCZUHLGCEKRZ-UHFFFAOYSA-N cerium(3+) lanthanum(3+) oxygen(2-) Chemical compound [O--].[O--].[O--].[La+3].[Ce+3] ONLCZUHLGCEKRZ-UHFFFAOYSA-N 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 3
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 38
- 238000004891 communication Methods 0.000 description 15
- 229920002120 photoresistant polymer Polymers 0.000 description 13
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 8
- 239000000758 substrate Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052787 antimony Inorganic materials 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
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- -1 tungsten nitride Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/5329—Insulating 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
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76807—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics for dual damascene structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49827—Via connections through the substrates, e.g. pins going through the substrate, coaxial cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/5226—Via connections in a multilevel interconnection structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/528—Geometry or layout of the interconnection structure
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Geometry (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Description
本發明係有關積體電路處理。
現代的積體電路使用導電的互連來連接晶片上的各個裝置及/或與外部裝置發送及/或接收信號。互連之常見的類型包括耦接至各個裝置之銅與銅合金互連(線路),其包括藉由互連穿過貫孔的其它互連(線路)。常見的積體電路具有藉由介電材料分開之互連的多層(例如,5或6層)。在習知的積體電路結構中,用於層間介電質(ILD)最普及的介電材料為二氧化矽(SiO2
)。目前的努力集中在使ILD的有效介電常數最小化,因此,具有介電常數低於SiO2
的材料(低k介電材料)已獲得很大的重視。很多的這些材料,諸如碳、矽、氧基材料都為多孔的。
發展與實施低k ILD式的積體電路可使用互補與相容的微影術與蝕刻處理來使裝置圖案化,其不會腐蝕下方的層而危及到裝置的性能。典型上,接觸是使用鎢來予以製成,例如,如電晶體裝置之源極/汲極接面與第一層互連之間的垂直互連,其典型上是由雙鑲嵌式金屬與用來連接到多層互連設計中接點層的貫孔所構成。目前應用於沈積在接點上之第一雙鑲嵌式金屬層(M1/V0)之柱塞圖案化清除法的處理窗口通常很窄,這是因為需要能夠去除金屬
硬遮罩(例如,鈦或氮化鈦)、光阻、及殘餘的蝕刻聚合物,然而同時不能蝕刻到鎢(經由V0而暴露出之接點中的鎢)銅、或低k ILD。
用以在積體電路結構上形成第一雙鑲嵌式金屬層(M1)的一項製程係使用氮化鈦硬遮罩來建立圍繞鎢柱塞的雙鑲嵌式M1V0。氮化鈦硬遮罩係導電的,且因此必須要去除以避免線路間短路。還沒找到能去除氮化鈦而對鎢接點層不具破壞性之濕式清潔的化學藥品。為了解決這個問題,一種解決方法是在M1V0圖案化後並且在去除氮化鈦之前,犧牲光吸收材料(SLAM)先被沈積並乾式蝕刻以做為濕式清潔氮化鈦期間保護下方之鎢的保護層。此方法會是昂貴的且傾向加大M1V0的關鍵尺寸,由於多重的處理步驟,其會導致V0的錯誤接觸短路。
圖1顯示積體電路結構之部分的斷面側視圖,諸如在形成互連到裝置之製程點處,在矽晶粒上之微處理器晶片的一部分,包括到可能的其它互連。諸如微處理器晶片之典型的積體電路結構,例如具有被層間介電(ILD)材料彼此隔開的多個互連層或平面。請參閱圖1,結構100包括基板110,其可以是其上具有包括電晶體的電路裝置以及互連到裝置之一或多個平面的晶圓基板(例如,矽晶圓的一部分)。圖1顯示的接點120可以是形成在基板(例如,矽基板)內或上的電路裝置,或是形成在晶圓上方到
達晶圓上之裝置的互連線。須瞭解,本文所描述的技術可用於積體電路內之各種不同的互連,包括互連到包括有電路裝置及其它互連的裝置。就意義上來說,接點120代表這類裝置或形成互連接觸的互連。
圖1中之覆蓋基板110者為諸如氮化矽(Six
Ny
)或碳氮化矽(SiCN)之材料的蝕刻停止層130。覆蓋蝕刻停止層130者為例如ILD的介電層140。介電層140之具代表性的材料為例如具有介電常數(k)小於二氧化矽(SiO2
)之介電常數的材料(例如,“低k”材料)。具代表性的低k材料包括了包含有矽、碳及氧的材料,此材料可被稱為聚合物,且是習知技術。在一個實施例中,介電層140為多孔的。
在圖1中,覆蓋介電層140者為第一硬遮罩150。在一個實施例中,第一硬遮罩150為介電材料。適用於硬遮罩150的介電材料包括例如介電常數(k)大於二氧化矽(SiO2
)之介電常數的材料(例如,“高k”材料)。適合之材料是那些具有之密度大於介電材料140所用材料的材料,且相對於介電層140之材料具有蝕刻選擇性(例如,與介電層140之材料具有不同的蝕刻速率或互斥的材料)。具代表性的材料包括氮氧化矽、氧化鉿、氧化鋯、矽化鉿、氮氧化鉿、及氧化鑭、氧化鋁及類似的高介電常數材料。在一個實施例中,硬遮罩150例如藉由電漿沈積處理而被沈積到可做為下方介電層140之遮罩用的厚度(例如,保護介電材料免於受到後續之遮罩對位(mask
registration)中所使用之能量而造成之不想要的修改)。在一個實施例中,具代表性的厚度為不會對ILD之整體介電常數(介電層加上硬遮罩150)有重大影響的厚度,但至多將輕微地影響此整體介電常數。在一個實施例中,具代表性的厚度為30埃(Å)±20 Å的等級。在另一實施例中,具代表性的厚度為2至5奈米(nm)的等級。
在圖1的結構100中,覆蓋硬遮罩150者為選用的硬遮罩160。在一個實施例中,硬遮罩160為導電材料,諸如氮化矽、氮化鈦、或鈦。須瞭解,由於其為選用的,所以第二硬遮罩160並不需要出現。如果出現,第二硬遮罩160之具代表性的厚度為20奈米的等級。
圖2顯示圖1在光阻材料170的沈積與圖案化之後的結構。在此實施例中,光阻170被圖案化以便在第二硬遮罩160上方界定允許硬遮罩160與硬遮罩150圖案化之開口175,以露出介電層140供溝槽開口用。
圖3顯示圖2在溝槽之開口直達介電層140並去除光阻材料170之後的結構。圖3也顯示在去除選用之硬遮罩160後的結構100。在一個實施例中,可以用濕式清潔化學藥品來去除氮化矽的硬遮罩。
圖4顯示圖3在結構之上及硬遮罩150上方沈積犧牲材料(例如,SLAM、BARC)且犧牲材料進入溝槽200之後的結構。犧牲材料210被沈積到大於溝槽200之深度的厚度以提供平坦表面。在犧牲材料210的沈積之後,光阻材料220被沈積並圖案化以包括用以形成貫孔的開口
230。請參閱圖4,須注意,用來界定開口230之光阻220的圖案化不需要是精確的。硬遮罩150的出現將防止蝕刻進入被硬遮罩所保護之介電層140的區域。在此方法中,描述以自對準處理來形成貫孔250。
圖5顯示所形成的貫孔250通過介電層140及蝕刻停止層130而到達接點120。
圖6顯示圖5在去除了光阻層220及犧牲材料210,並在溝槽200與貫孔250中沈積了導電材料之後的結構。用於溝槽200與貫孔250之適合的導電材料為藉由電鍍處理所沈積的銅或銅合金。須理解,貫孔與溝槽可襯以(lined with)障壁層或黏著層。適合障壁層的材料包括但不限於耐火材料,諸如氮化鈦、氮化鎢、鉭或氮化鉭。適合黏著層的材料包括但不限於鈦、鉭、及釕。此外,可在導入銅或銅合金導電材料之前,先沈積適合的晶種材料(seed material)。適合沈積銅互連材料的晶種材料包括銅、鎳、鈷、及釕。圖6也顯示在形成貫孔250與溝槽200之後剩餘的硬遮罩150,並選擇性地保留做為結構100的永久部分。在另一實施例中,在貫孔250形成之後硬遮罩150被去除。圖7顯示結構100的頂視圖,並說明貫孔250與溝槽200皆被填以導電材料。毗鄰的溝槽200與貫孔250為導電材料之對應的溝槽。須理解,在結構100中所顯示的互連層上可形成到達其它接點之另外的互連層,包括但不限於包括有互連線的下方裝置。
在以上的實施例中,形成整個溝槽深度,接著去除導
電材料的選用硬遮罩(硬遮罩160),及到達接點的整個貫孔深度。在另一實施例中,此製程可做修改,例如,在去除導電材料的選用硬遮罩之前,先將貫孔形成到部分的深度。按此方式,在去除選用之導電材料硬遮罩的期間,位在部分貫孔深度以下之剩餘的介電材料可保護接點(例如,接點120)不致受到可能的損害。另一修改是部分溝槽深度修改結合所描述之部分貫孔深度的修改製程,在此,溝槽形成到部分深度、貫孔形成到部分深度、去除導電材料的選用硬遮罩、及完成貫孔與溝槽的深度。
圖8說明按照本發明之一個實施的計算裝置300。計算裝置300容納主機板302。主機板302可包括許多組件,包括但不限於處理器304及至少一個通信晶片306。處理器304係實體與電性地耦接至主機板302。在某些實施中,至少一通信晶片306也實體與電性地耦接至主機板302。在另些實施中,通信晶片306為處理器304的一部分。
視其應用而定,計算裝置300可包括其它組件,這些組件可以或不與主機板302實體與電性地耦接。這些其它的組件包括但不限於揮發性記憶體(例如,DRAM 308)、非揮發性記憶體(例如,ROM 309)、快閃記憶體、繪圖處理器310、數位信號處理器、密碼處理器、晶片組311、天線312、顯示器、觸控螢幕顯示器320、觸控螢幕控制器313、電池319、聲音編解碼器、視訊編解碼器、功率放大器316、全球定位系統(GPS)裝置314、指北針315、加速儀、迴旋儀、喇叭317、照相機318、及大
量儲存裝置(諸如硬式磁碟機、光碟機(CD)、數位多功能光碟(DVD)、等等)。
通信晶片306能夠無線通信以便與計算裝置300之間往來傳輸資料。“無線”這個名詞及它的衍生字可被用來描述電路、裝置、系統、方法、技術、通道頻道等,其可經由使用調變的電磁輻射經由非固體的媒介來傳遞資料。此名詞並未暗示相關的裝置不包含任何導線,然而在某些實施例中沒有導線。通信晶片306可用任何一種無線標準或協定來實施,包括但不限於Wi-Fi(IEEE 802.11系列)、WiMAX(IEEE 802.16系列)、IEEE 802.20、長期演化(LTE)、Ev-DO、HSPA+、HSDPA+、HSUPA+、EDGE、GSM、GPRS、CDMA、TDMA、DECT、藍牙、及它們的衍生物、以及稱為3G、4G、5G及以後任何其它的無線協定。計算裝置300可包括複數個通信晶片306。例如,第一通信晶片可專用於較近距離的無線通信諸如Wi-Fi與藍牙,而第第二通信晶片可專用於較遠距離的無線通信,諸如GPS、EDGE、GPRS、CDMA、WiMAX、LTE、Ev-DO、及其它。
計算裝置300的處理器304包括封裝在處理器304之內的積體電路晶粒。在某些實施中,處理器的積體電路晶粒包括一或多個裝置,諸如按照以上描述之實施所形成的電晶體或互連,在此,以介電硬遮罩來覆蓋一或多層介電層(ILD)可保持最終的電路晶粒結構。“處理器”一詞意指處理來自暫存器及/或記憶體之電子資料,將該電子資
料轉換成可被存入暫存器及/或記憶體中之其它電子資料的任何裝置或部分裝置。
通信晶片306也包括封裝在通信晶片306之內的積體電路晶粒。按照本發明的其它實施,通信晶片的積體電路晶粒包括一或多個裝置,諸如按照以上所描述在一或多層介電層上結合介電硬遮罩之實施所形成的電晶體或互連。
在另些實施中,容納於計算裝置300內之其它組件包含積體電路晶粒,其包括一或多個裝置,諸如按照以上所描述在一或多層介電層上結合介電硬遮罩之實施所形成的電晶體或互連。
在各種不同的實施中,計算裝置300可以是膝上型電腦、連網小筆電、筆記型電腦、超輕薄筆電、智慧型手機、平板電腦、個人數位助理(PDA)、超行動PC、行動電話、桌上型電腦、伺服器、印表機、掃描器、監視器、機上盒、娛樂控制單元、數位式照相機、可攜式音樂播放器、或數位式錄影機。在另些實施中,計算裝置300可以是處理資料的任何其它電子裝置。
在以上的描述中,基於解釋之目的,為了提供對實施例的徹底瞭解而陳述了諸多特定的細節。不過,熟悉此方面技術之人士須明瞭,實行一或多個其它的實施例不用這些特定的某些細節。所描述之特定的實施例不是提供對本發明之限制,而是對本發明的說明。本發明的範圍不是由以上提供的特定實例來決定,而僅由以下的申請專利範圍來予以決定。在其它例中,習知的結構、裝置、及操作以
方塊圖的形式來予以顯示,或不詳述細節,以避免模糊了對本敍述的瞭解。在各圖之間被重複之參考數字或參考數字的終端部分係用來指示對應或類似的元件,這些元件選擇性地具有類似之特性在此被認為是恰當的。
亦須理解,本說明書從頭到尾參考的例如“一個實施例”、“某實施例”、“一或多個實施例”、或“不同的實施例”,意指某特定的特徵可包括在本發明的實行中。同樣地,須理解,為了使揭示順暢並有助於對種種發明態樣之瞭解,所描述的種種特徵有時被群組在單一個實施例、圖、或對其的描述中。不過,所揭示的此方法,並不能解釋成反映本發明需要比每一個申請專利範圍項所明確陳述更多之特徵的意圖。反之,如下述申請專利範圍反映,發明的態樣在於可少於所揭示之單一實施例的所有特徵。因此,接在實施方式之後的申請專利範圍特此明確地併入實施方式,每一項申請專利範圍都依據其自已做為本發明的獨立實施例。
100‧‧‧結構
110‧‧‧基板
120‧‧‧接點
130‧‧‧蝕刻停止層
140‧‧‧介電層
150‧‧‧第一硬遮罩
160‧‧‧第二硬遮罩
170‧‧‧光阻材料
175‧‧‧開口
200‧‧‧溝槽
210‧‧‧犧牲材料
220‧‧‧光阻材料
230‧‧‧開口
250‧‧‧貫孔
300‧‧‧計算裝置
302‧‧‧主機板
304‧‧‧處理器
306‧‧‧通信晶片
308‧‧‧DRAM
309‧‧‧ROM
310‧‧‧繪圖處理器
311‧‧‧晶片組
312‧‧‧天線
313‧‧‧觸控螢幕控制器
314‧‧‧全球定位系統(GPS)裝置
315‧‧‧指北針
316‧‧‧功率放大器
317‧‧‧喇叭
318‧‧‧照相機
319‧‧‧電池
320‧‧‧觸控螢幕
圖1顯示包括接點之部分電路結構的剖面側視示意圖,在接點上方為蝕刻停止層,接著層間介電質(ILD)及兩層硬遮罩。
圖2顯示圖1導入光阻材料以溝槽圖案化硬遮罩的結構。
圖3顯示圖2接著形成溝槽並去除光阻材料及選擇性
地去除一硬遮罩的結構。
圖4顯示圖3接著在結構上方導入犧牲材料並導入經圖案化的光阻材料來界定一或多個貫孔之結構。
圖5顯示圖4接著貫孔之開口到達下方接點的結構。
圖6顯示圖5接著去除犧牲光吸收材料及光阻材料並在溝槽與貫孔中導入導電材料的結構。
圖7顯示圖6之結構的頂視圖。
圖8說明計算裝置之概示說明圖。
100‧‧‧結構
110‧‧‧基板
120‧‧‧接點
130‧‧‧蝕刻停止層
140‧‧‧介電層
150‧‧‧第一硬遮罩
Claims (15)
- 一種形成積體電路結構的方法,包含:在積體電路結構的接觸點上形成介電層;在該介電層的表面上形成包含介電材料的硬遮罩;在該硬遮罩中形成開口,並在該介電層中形成溝槽;在該溝槽中以及在該硬遮罩上形成犧牲材料;在該犧牲材料上形成遮罩,該遮罩具有用於貫孔形成的至少一開口;使用該硬遮罩做為圖案,在該介電層中形成至少一個到達該接觸點的貫孔;以及在形成到達該接觸點的該至少一個貫孔之後,在該貫孔中形成與仍保留在該介電層上之該硬遮罩的互連。
- 如申請專利範圍第1項之形成積體電路結構的方法,其中,該硬遮罩的該介電材料具有大於二氧化矽之介電常數的介電常數。
- 如申請專利範圍第1項之形成積體電路結構的方法,其中,該硬遮罩的該介電材料具有大於該介電層之介電材料之密度的密度。
- 如申請專利範圍第2項之形成積體電路結構的方法,其中,該硬遮罩的該介電材料係選自由氮氧化矽、氧化鉿、氧化鋯、矽化鉿、氮氧化鉿、及氧化鑭所構成的群組。
- 如申請專利範圍第2項之形成積體電路結構的方法,其中,該介電層的材料具有小於二氧化矽之介電常數 的介電常數。
- 如申請專利範圍第2項之形成積體電路結構的方法,其中,該介電層的材料為多孔的。
- 如申請專利範圍第1項之形成積體電路結構的方法,其中,在該溝槽中以及在該硬遮罩上形成該犧牲材料包括將材料沉積到大於該溝槽之深度的厚度以定義出平坦表面。
- 一種形成積體電路結構的方法,包含:在積體電路結構的接觸點上形成介電層;在該介電層的表面上形成包含介電材料的第一硬遮罩;在該第一硬遮罩上形成包含導電材料的第二硬遮罩;在該第一硬遮罩和該第二硬遮罩中形成開口,並在該介電層中形成溝槽;在該溝槽中以及在該硬遮罩上形成犧牲材料;在該犧牲材料上形成遮罩,該遮罩具有用於貫孔形成的至少一開口;以及使用該硬遮罩做為圖案,在該介電層中形成至少一個到達該接觸點的貫孔。
- 如申請專利範圍第8項之形成積體電路結構的方法,其中,在形成該至少一條溝槽之後,去除該第二硬遮罩。
- 一種形成積體電路結構的方法,包含:在積體電路結構的接觸點上形成第一低K介電材料的 介電層;在該介電層的表面上形成包含第二高K介電材料的硬遮罩;為至少一條溝槽而圖案化該硬遮罩;在該介電層中形成該至少一條溝槽;以及在形成該至少一條溝槽之後,在該至少一條溝槽中及在該硬遮罩上形成犧牲材料;在該犧牲材料上形成遮罩,該遮罩具有用於貫孔形成的至少一開口;在該介電層中形成到達該接觸點的至少一個貫孔;以及在到達該接觸點的該貫孔中形成與仍保留在該介電層上之該硬遮罩的互連。
- 如申請專利範圍第10項之形成積體電路結構的方法,其中,該硬遮罩之該第二高K介電材料具有大於該介電層之該第一低K介電材料之密度的密度。
- 如申請專利範圍第10項之形成積體電路結構的方法,其中,該硬遮罩之該第二高K介電材料係選自由氮氧化矽、氧化鉿、氧化鋯、矽化鉿、氮氧化鉿、及氧化鑭所構成的群組。
- 如申請專利範圍第10項之形成積體電路結構的方法,其中,在該至少一條溝槽中及在該硬遮罩上形成該犧牲材料包括將材料沉積到大於該溝槽之深度的厚度以定義 出平坦表面。
- 一種形成積體電路結構的方法,包含:在積體電路結構的接觸點上形成第一低K介電材料的介電層;以及在該介電層的表面上形成包含第二高K介電材料的第一硬遮罩;在該第一硬遮罩上形成包含導電材料的第二硬遮罩;為至少一條溝槽而圖案化該第一硬遮罩及該第二硬遮罩;在該介電層中形成該至少一條溝槽;以及在形成該至少一條溝槽之後,在該至少一條溝槽中及在該硬遮罩上形成犧牲材料;在該犧牲材料上形成遮罩,該遮罩具有用於貫孔形成的至少一開口;在該介電層中形成到達該接觸點的至少一個貫孔;以及在到達該接觸點的該貫孔中形成與仍保留在該介電層上之該硬遮罩的互連。
- 如申請專利範圍第14項之形成積體電路結構的方法,其中,在形成該至少一條溝槽之後,去除該第二硬遮罩。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2011/067764 WO2013101028A1 (en) | 2011-12-29 | 2011-12-29 | Avd hardmask for damascene patterning |
Publications (2)
Publication Number | Publication Date |
---|---|
TW201342528A TW201342528A (zh) | 2013-10-16 |
TWI512893B true TWI512893B (zh) | 2015-12-11 |
Family
ID=48698267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW101148340A TWI512893B (zh) | 2011-12-29 | 2012-12-19 | 用於鑲嵌式圖案化之avd硬遮罩 |
Country Status (3)
Country | Link |
---|---|
US (3) | US9502281B2 (zh) |
TW (1) | TWI512893B (zh) |
WO (1) | WO2013101028A1 (zh) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9679803B2 (en) | 2014-01-13 | 2017-06-13 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method for forming different patterns in a semiconductor structure using a single mask |
WO2017049267A1 (en) | 2015-09-19 | 2017-03-23 | Applied Materials, Inc. | Titanium-compound based hard mask films |
CN105789115A (zh) * | 2016-04-26 | 2016-07-20 | 京东方科技集团股份有限公司 | 过孔的制作方法、阵列基板及其制作方法、显示装置 |
US10903110B2 (en) * | 2018-12-06 | 2021-01-26 | Nanya Technology Corporation | Method of forming fine interconnection for a semiconductor device |
US20220384366A1 (en) * | 2021-06-01 | 2022-12-01 | Cree, Inc. | Multilayer encapsulation for humidity robustness and related fabrication methods |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020081854A1 (en) * | 2000-12-22 | 2002-06-27 | Patrick Morrow | Method for making a dual damascene interconnect using a multilayer hard mask |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5126006A (en) * | 1990-10-30 | 1992-06-30 | International Business Machines Corp. | Plural level chip masking |
US5651855A (en) * | 1992-07-28 | 1997-07-29 | Micron Technology, Inc. | Method of making self aligned contacts to silicon substrates during the manufacture of integrated circuits |
US7115517B2 (en) * | 2003-04-07 | 2006-10-03 | Applied Materials, Inc. | Method of fabricating a dual damascene interconnect structure |
US7335980B2 (en) | 2004-11-04 | 2008-02-26 | International Business Machines Corporation | Hardmask for reliability of silicon based dielectrics |
US7767570B2 (en) * | 2006-03-22 | 2010-08-03 | Taiwan Semiconductor Manufacturing Company, Ltd. | Dummy vias for damascene process |
US7550377B2 (en) * | 2006-06-22 | 2009-06-23 | United Microelectronics Corp. | Method for fabricating single-damascene structure, dual damascene structure, and opening thereof |
US7833893B2 (en) * | 2007-07-10 | 2010-11-16 | International Business Machines Corporation | Method for forming conductive structures |
JP2010171081A (ja) | 2009-01-20 | 2010-08-05 | Toshiba Corp | 半導体装置及びその製造方法 |
-
2011
- 2011-12-29 US US13/995,133 patent/US9502281B2/en active Active
- 2011-12-29 WO PCT/US2011/067764 patent/WO2013101028A1/en active Application Filing
-
2012
- 2012-12-19 TW TW101148340A patent/TWI512893B/zh active
-
2016
- 2016-10-24 US US15/332,199 patent/US9780038B2/en active Active
-
2017
- 2017-10-02 US US15/723,083 patent/US10593626B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020081854A1 (en) * | 2000-12-22 | 2002-06-27 | Patrick Morrow | Method for making a dual damascene interconnect using a multilayer hard mask |
Also Published As
Publication number | Publication date |
---|---|
US9780038B2 (en) | 2017-10-03 |
WO2013101028A1 (en) | 2013-07-04 |
US9502281B2 (en) | 2016-11-22 |
US20130320564A1 (en) | 2013-12-05 |
US20180122744A1 (en) | 2018-05-03 |
US20170040263A1 (en) | 2017-02-09 |
US10593626B2 (en) | 2020-03-17 |
TW201342528A (zh) | 2013-10-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10032643B2 (en) | Method and structure to contact tight pitch conductive layers with guided vias using alternating hardmasks and encapsulating etchstop liner scheme | |
KR101619682B1 (ko) | 후드층을 갖는 에어갭 인터커넥트 및 그 형성 방법 | |
US9659860B2 (en) | Method and structure to contact tight pitch conductive layers with guided vias | |
US10672650B2 (en) | Via blocking layer | |
KR102073176B1 (ko) | 등각 저온 밀봉 유전체 확산 장벽들 | |
EP3097582B1 (en) | Methods for forming interconnect layers having tight pitch interconnect structures | |
JP6415686B2 (ja) | ボイドにより破壊を加速させたmos型アンチヒューズ | |
US10593626B2 (en) | AVD hardmask for damascene patterning | |
CN109155279B (zh) | 通路阻断层 | |
TW201735303A (zh) | 用於形成具有改善的調正及電容降低之導電特徵的技術 | |
TW201526231A (zh) | 微電子晶體接點及其製造方法 | |
TW201735302A (zh) | 用於形成具有改進的對準及電容降低的導電特徵的技術 |