TWI742484B - 用於與被動裝置使用之虛置填充方案 - Google Patents
用於與被動裝置使用之虛置填充方案 Download PDFInfo
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- TWI742484B TWI742484B TW108145769A TW108145769A TWI742484B TW I742484 B TWI742484 B TW I742484B TW 108145769 A TW108145769 A TW 108145769A TW 108145769 A TW108145769 A TW 108145769A TW I742484 B TWI742484 B TW I742484B
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- 239000004065 semiconductor Substances 0.000 claims abstract description 113
- 238000002955 isolation Methods 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000010410 layer Substances 0.000 claims description 42
- 239000010409 thin film Substances 0.000 claims description 27
- 239000011229 interlayer Substances 0.000 claims description 25
- 239000002019 doping agent Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 18
- 239000002184 metal Substances 0.000 abstract description 18
- 238000005530 etching Methods 0.000 description 14
- 230000005669 field effect Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000003989 dielectric material Substances 0.000 description 9
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- 235000012431 wafers Nutrition 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
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- 229910021332 silicide Inorganic materials 0.000 description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
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- 235000012239 silicon dioxide Nutrition 0.000 description 3
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- -1 silicon dioxide)) Chemical compound 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 238000012876 topography Methods 0.000 description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
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- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
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- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
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- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 1
- 229910021334 nickel silicide Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005389 semiconductor device fabrication Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 229910021341 titanium silicide Inorganic materials 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
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- 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
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Abstract
本發明係關於包括例如金屬基電阻器的被動裝置的結構以及形成包括被動裝置的結構的方法。該結構包括半導體基底、包括被動裝置的互連結構、以及配置在該被動裝置與該半導體基底之間的虛置填充區域。該虛置填充區域包括複數個淺溝槽隔離區域在該半導體基底中、複數個半導體鰭件、複數個源極/汲極區域在該複數個半導體鰭件中、以及配置在該複數個淺溝槽隔離區域上方的複數個接點。
Description
本發明是關於半導體裝置製作和積體電路,並且尤其是關於包括例如金屬基(metal-based)電阻器的被動裝置的結構以及形成包括被動裝置的結構的方法。
互補式金屬氧化物半導體(CMOS)程序可於基底的前段處理期間用來建立p型和n型場效電晶體的組合,其用來建構例如邏輯胞元。場效電晶體大致上包括本體(body),其提供通道區域、源極、汲極和閘極電極。當超過特性臨界電壓的控制電壓施加至該閘極電極時,載子流動發生在該源極與汲極之間的該通道區域中,以產生裝置輸出電流。P型場效電晶體是形成在該基底中包含n阱的主動區域中,而n型場效電晶體則是形成在該基底中包括p阱的主動區域中。
鰭型場效電晶體(FinFET)是非平面裝置結構,其可比平面場效電晶體更緊密地封裝在積體電路中。鰭型場效電晶體可包括由半導體材料的本體所組成的鰭件、繞著該鰭件的閘極結構、以及沿著該鰭件間隔開並且配置在該閘極結構的相對側上的重度摻雜的源極/汲極區域。該源極/
汲極區域是連接至接點,該接點致能與接續於前段處理而製作的互連結構中的金屬化(metallization)的接續直立連接。
互連結構包括與場效電晶體連接的互連。被動裝置(例如,金屬基電阻器)可形成在互連結構中。被動裝置是配置在積體電路的區域中,該區域位在前段處理期間所形成的虛置填料(dummy fill)上方。虛置填料在化學機械研磨期間需要最小化形貌,並且尤其是需要減輕於化學機械研磨期間在被動裝置之下產生的形貌。在被研磨的材料缺乏足夠密度的情況下,可發生局部化過研磨,其在該研磨後導致碟化(dishing)和非平面表面。形成被動裝置(例如,金屬基電阻器)在非平面表面上方可能不利地影響其效能。虛置填料可包括場效電晶體的特徵,該特徵是以傳統方式與主動場效電晶體一起製作。構成傳統虛置填料的場效電晶體特徵在被動裝置與基底之間導致高程度的電容耦合。
需要包括例如金屬基電阻器的被動裝置的改進結構和形成包括被動裝置的結構的方法。
在本發明的實施例中,結構包括半導體基底、包括被動裝置的互連結構、以及配置在該被動裝置與該半導體基底之間的虛置填充區域。該虛置填充區域包括複數個淺溝槽隔離區域在該半導體基底中、複數個半導體鰭件、複數個閘極結構、複數個源極/汲極區域在該複數個半導體鰭件中、以及複數個接點配置在該複數個淺溝槽隔離區域上方。
在本發明的實施例中,方法包括形成從半導體基底突出的複數個半導體鰭件、形成圍繞該複數個半導體鰭件的複數個淺溝槽隔離區
域在該半導體基底中、形成複數個源極/汲極區域在該複數個半導體鰭件中、以及形成配置在該複數個淺溝槽隔離區域上方的複數個接點。該方法進一步包括形成包括配置在該複數個半導體鰭件、該複數個接點和該複數個淺溝槽隔離區域上方的被動裝置的互連結構,該複數個半導體鰭件、該複數個接點和該複數個淺溝槽隔離區域提供虛置填充區域在該被動裝置下方。
10:半導體鰭件
11:邊緣
12:淺溝槽隔離區域
13:頂表面
14:半導體基底
16:壕溝區域
18:閘極結構
20:側壁間隔件
22:半導體層、磊晶半導體層
24:層間介電層
26:蝕刻遮罩
28:開口
29:凹洞
30:接點
32、33:層間介電層
34:薄膜電阻器
36:打線、互連
37:互連結構
38:接點
併入且構成此說明書的一部分的伴隨圖式例示本發明的各種實施例,並且連同上方給出的該發明的一般性描述及下方給出的實施例的詳細描述,用來解釋本發明的實施例。在圖式中,相同元件符號是用來指示各種視圖中的相同特徵。
第1圖是在依據本發明的實施例的處理方法的初始製作階段中的結構的頂視圖。
第2圖大致上沿著第1圖中的線2-2所取用的剖視圖。
第3-7圖是在接續第2圖的處理方法的延續製作階段的結構的剖視圖。
參考第1、2圖並依據本發明的實施例,結構包括從半導體基底14向上突出的半導體鰭件10及淺溝槽隔離區域12。藉由以微影和蝕刻程序圖案化半導體基底14的單晶半導體材料(例如,單晶矽),可形成半導體鰭件10。半導體鰭件10可朝長度方向(也就是,y-方向)在數列中對
準,並且不同的列可朝與該長度方向正交的方向(也就是,x-方向)側向地隔開。
淺溝槽隔離區域12從半導體基底14的頂表面13延伸至該半導體基底14的該頂表面13之下的給定深度,並且圍繞半導體鰭件10。淺溝槽隔離區域12可由介電材料(例如,矽的氧化物(例如,二氧化矽))組成,藉由化學氣相沉積(CVD)沉積到半導體基底14中的蝕刻溝槽中,然後被研磨以及去漬(deglazed)。淺溝槽隔離區域12隔離半導體鰭件10之下的半導體基底14的個別裝置區域。淺溝槽隔離區域12也定義用於虛置填充區域的外周界的邊緣11,該虛置填充區域是接續地形成,並且在該虛置填充區域上方的薄膜電阻器也是接續地形成。
壕溝區域16是配置在半導體鰭件10之下的半導體基底14中。壕溝區域16延伸至半導體基底14中的深度,其大於淺溝槽隔離區域12的深度。壕溝區域16的部分是分別地配置在淺溝槽隔離區域12內側並且在各個半導體鰭件10之下,以提供主動區域。壕溝區域16是由輕度摻雜的半導體材料組成,該半導體材料提供高阻抗。舉例來說,壕溝區域16可輕度摻雜以含有小於或等於5x1015cm-3的摻質濃度。壕溝區域16上方的半導體基底14於離子布植期間以布植遮罩遮蔽,該離子布植形於互補式金屬氧化物半導體(CMOS)處理期間形成n-阱和p-阱在該半導體基底14的其它區段中。因此,壕溝區域16沒有以提供n-阱和p-阱的摻質布植,並且沒有那些摻質。
參考第3圖,其中,相同的元件符號是指第2圖中的相同特徵,並且在該處理方法的接續製作階段中,該結構復包括在半導體鰭件10和淺溝槽隔離區域12上方跨越的閘極結構18。閘極結構18沿著橫向於半導體鰭件10的個別縱軸延伸,並且,一些閘極結構18與半導體鰭件10的
區段重疊並且繞著該區段。各個閘極結構18可包括閘極電極和在該閘極電極與個別半導體鰭件10之間的閘極介電質,該閘極電極可包括一個或更多個共形阻障金屬層及/或工作函數金屬層,例如,由鈦鋁碳化物及/或鈦氮化物組成的金屬層及/或由導體(例如,鎢、鈷或鋁)所組成的金屬閘極填充層,並且該閘極介電質可由高-k介電材料(例如,鉿氧化物)組成。閘極結構18可形成為取代金屬閘極程序的一部分。
側壁間隔件20是配置在閘極結構18的側壁處。在實施例中,側壁間隔件20是從由介電材料(例如,低-k介電材料,例如,SiOCN、SiBCN、SiCO、SiOC或SiC)所組成的層形成,該介電材料藉由電漿加強化學氣相沉積或原子層沉積共形地沉積,並且之後以非等向性蝕刻程序蝕刻。
半導體層22是形成在半導體鰭件10中所蝕刻的凹洞中。半導體層22可由磊晶生長程序形成,在該磊晶生長程序中,半導體材料從半導體鰭件10的暴露表面磊晶生長。磊晶半導體層22供應用於使用半導體鰭件10形成的場效電晶體的源極/汲極區域。如本文中所使用的,術語「源極/汲極區域」意指半導體材料的摻雜區域,其可作用成場效電晶體的源極或汲極。磊晶半導體層22可含有矽-鍺,其於磊晶生長期間以p型摻質(例如,硼、鋁、鎵、及/或銦)摻雜,以提供p型電性連接性,並且提供用於源極/汲極區域接點的著陸區域(landing area)。或者,磊晶半導體層22可含有矽,其於磊晶生長期間以n型摻質(例如,磷及/或砷)摻雜,以提供n型電性連接性,並且可視需要而以碳摻雜。
形成層間介電層24,其包括區段,該區段填充磊晶半導體層22上方在閘極結構18上的側壁間隔件20之間的空間以及淺溝槽隔離區域12上方在閘極結構18上的側壁間隔件20之間的空間。層間介電層
24可由介電材料(例如,矽的氧化物(例如,二氧化矽))組成,其由化學氣相沉積沉積並且平坦化。形成閘極結構18的取代閘極程序可於層間介電層24形成後實施。
參考第4圖,其中,相同的元件符號是指第3圖中的相同特徵,並且在該處理方法的接續製作階段中,蝕刻遮罩26是形成在該層間介電層24上方。蝕刻遮罩26包括開口28,其暴露淺溝槽隔離區域12上方的閘極結構18的區段和層間介電層24的區段。蝕刻遮罩26可包括來自有機平坦化層(OPL)的材料,其被鋪設作為自旋式硬遮罩,並且之後由微影蝕刻程序圖案化,以提供開口28。蝕刻遮罩26覆蓋配置在半導體鰭件10上方的閘極結構18的區段和及半導體鰭件10中的磊晶半導體層22上方的層間介電層24的區段。
參考第5圖,其中,相同的元件符號是指第4圖中的相同特徵,並且在該處理方法的接續製作階段中,使用蝕刻程序移除在淺溝槽隔離區域12上方並且在閘極結構18之間的層間介電層24的區段,其被開口28暴露。蝕刻程序對於閘極結構18和側壁間隔件20的材料而選擇性移除層間介電層24的介電材料,並且產生凹洞29。在半導體鰭件10上方和在閘極結構18之間的層間介電層24的區段由蝕刻遮罩26遮蔽,並且在蝕刻程序完成之後完整無損傷。
參考第6圖,其中,相同的元件符號是指第5圖中的相同特徵,並且在該處理方法的接續製作階段中,蝕刻遮罩26由例如具有氧化物電漿的灰化(ashing)加以移除。接點30是形成在淺溝槽隔離區域12上方和閘極結構18之間的凹洞29(第5圖)中,凹洞係由選擇性移除層間介電層24的區段而打開。半導體鰭件10上方和閘極結構18之間的層間介電層24的區段作用成阻擋形成接點30延伸至磊晶半導體層22。
接點30可由金屬、金屬矽化物或其組合組成。舉例來說,接點30可包括由金屬矽化物(例如,鎢矽化物、鈦矽化物、鎳矽化物或鈷矽化物)組成的下部分、由例如鎢組成的上部分、以及由例如關於該上部分的鈦氮化物組成的襯裡(未顯示)。接點30的上和下部分,並連同襯裡,可各者由例如化學氣相沉積沉積,並且該接點30的該上部分可由化學機械研磨平坦化,並且以選擇性蝕刻程序凹化。接點30可配置成直接實體接觸淺溝槽隔離區域12的頂表面13,具體來說,該接點30的個別下部分(其包含金屬矽化物)可配置成與該淺溝槽隔離區域12的該頂表面13直接實體接觸。
參考第7圖,其中,相同的元件符號是指第6圖中的相同特徵,並且在該處理方法的接續製作階段中,中段(MOL)處理和後段(BEOL)處理接著以形成互連結構37。互連結構37包括層間介電層32、33、可由例如MOL處理形成的薄膜電阻器34、以及由接點38而與該薄膜電阻器34連接的打線或互連36。互連結構37可與半導體基底14的其它區域中的主動和被動裝置(未顯示)連接。
接點38可由金屬(例如,鎢、銅或鈷)組成,並且位於層間介電層33中的個別蝕刻的接觸開口中。層間介電層32、33可由介電材料(例如,矽的氧化物)組成,由化學氣相沉積沉積,以及以例如化學機械研磨(CMP)平坦化。舉例來說,層間介電層32、33可由使用臭氧和四乙基正矽酸鹽(TEOS)作為反應物的化學氣相沉積所沉積的二氧化矽組成。
薄膜電阻器34是配置在半導體鰭件10、閘極結構18和接點30上方的互連結構37中,其參與形成在該薄膜電阻器34之下的虛置填充區域。在實施例中,薄膜電阻器34的占晶面積(footprint)(也就是,在半導體基底14的頂表面13處的投射面積)等於或實質地等於虛置填充區
域的周界或占晶面積,其由邊緣11(第1圖)所建立。參與虛置填充區域的閘極結構18是非主動或虛置閘極,並且參與該虛置填充區域的接點30沒有連接至上覆的互連結構37中的金屬化。特別地,配置在薄膜電阻器34與虛置填充區域之間的層間介電層32沒有包括接點,並且在該虛置填充區域上方是連續而沒有斷開的。薄膜電阻器34可由金屬(例如,鎳-鉻、鉭氮化物、鈦氮化物或鎢氮化物)組成,其是沉積在層間介電層32上並且之後被圖案化,以提供給定尺寸的形狀,並且其之後在圖案化後被層間介電層33覆蓋。相較於傳統多矽電阻器,薄膜電阻器34(其為金屬基的)可具有較低的電阻溫度係數,以為了於運作期間提供高準確性。
僅在淺溝槽隔離區域12上方的接點30的配置不同於傳統配置,在傳統配置中,接點僅配置在半導體鰭件10中的半導體層22上方。位於接點30之下的淺溝槽隔離區域12的介電材料的介電係數(也就是,介電常數)大於傳統配置中的摻雜的半導體材料的介電係數。放置虛置填充區域的接點30在淺溝槽隔離區域12的介電材料上方是運作成消除用於寄生電流的路徑。不放置虛置填充區域的接點30在半導體鰭件10上方是運作成減少薄膜電阻器34與半導體基底14之間的電容性耦合。壕溝區域16在半導體基底14中的配置不同於傳統配置,在傳統配置中,摻雜的阱是配置在半導體鰭件10之下。壕溝區域16具有較高阻抗,其運作成減少薄膜電阻器34與半導體基底14之間的耦合電容。薄膜電阻器34與半導體基底14之間的減少的電容性耦合可改進該薄膜電阻器34的頻率響應。虛置填料可致能更精確的形貌控制,以提供更嚴格的電性變異並且控制在晶片上、在不同晶片上、或在不同晶圓上製作的不同薄膜電阻器34之間的電阻匹配多者,並且也可有效率地將由該薄膜電阻器34所產生的熱轉移離開該薄膜電阻器34。
包括重新放置的接點30的虛置填充區域提供可隨著薄膜電阻器34的尺寸而縮放的結構。可滿足用於虛置填充區域的密度需求,而不用像傳統依賴與場效電晶體形狀相同的單元胞元(也就是,最小的重覆單元)。基於單元胞元的傳統虛置填料的占晶面積可大於薄膜電阻器的占晶面積,這會導致浪費繞著薄膜電阻器的外周界的晶片面積。對照之下,本發明的虛置填充區域的占晶面積(其由邊緣11(第1圖)建立)可等於或實質地等於薄膜電阻器34的占晶面積。在實施例中,薄膜電阻器34的邊緣可對稱地(也就是,直立地或水平地)對準於虛置填充區域的邊緣11。在實施例中,虛置填充區域的邊緣11可實質地對準於薄膜電阻器34的邊緣。在實施例中,虛置填充區域的邊緣11可朝相對於薄膜電阻器34的邊緣的兩個正交方向(也就是,x-方向和y-方向)對準,使得該虛置填充區域的該邊緣11和薄膜電阻器34彼此直立地並且重合(coincident)側向地移位。
在不同實施例中,虛置填充區域可與其它類型的被動裝置一起使用,例如,金屬-絕緣體-金屬電容器,其形成在互連結構37中。
上方所描述的方法是使用在製作積體電路晶片。生成的積體電路晶片可由製作者以生晶圓形式(例如,如具有多個未封裝晶片的單一晶圓)、裸晶、或以封裝形式加以分配。晶片可與其它晶片、分離電路元件、及/或其它訊號處理裝置整合,作為中間產品或終端產品的部件。終端產品可為包括積體電路晶片的任何產品,例如具有中央處理器的電腦產品或智慧型手機。
在本文中至由近似語言(例如,「大約」、「近似地」和「實質地」)所修飾的參考並不限制所指定的精確數值。近似語言可對應於用來測量該數值的儀器的精確性,並且,除非另外依於儀器的精確性,可指示陳述的數值的+/-10%。
在本文中至術語(例如,「直立」、「水平」等)的參考可藉由範例、而不是藉由限制作出,以建立參考的框架。如在本文中所使用的術語「水平」是定義成與半導體基底的傳統平面平行的平面,而不論其真正的三維空間轉向。術語「直立」和「正交」是指與如剛才所定義的水平垂直的方向。術語「側向」是指在該水平平面內的方向。
特徵「連接」或「耦接」至另一個元件可直接地連接或耦接至該其它元件、或者可出現一個或更多個中介元件。如果沒有中介元件出現,特徵可「直接地連接」或「直接地耦接」至另一個元件。如果出現至少一個中介元件,特徵可「間接地連接」或「間接地耦接」至另一個元件。特徵「上」或「接觸」另一個特徵可直接地在其它特徵上或直接接觸該其它特徵,或者可出現一個或更多個中介特徵。如果沒有中介特徵,特徵可「直接地在…上」或「直接接觸」另一個特徵。如果出現至少一個中介特徵,特徵可「間接地在…上」或「間接接觸」另一個特徵。
本發明的各種實施例的描述已經呈現,為了例示的目的,而不意圖窮盡或限制至所揭露的實施例。許多修飾和變化對於本領域中的熟習技術者將是明顯的,而不致於偏離該描述的實施例的範疇和精神。本文所使用的技術用語經選擇最佳解釋該實施例的原理、針對市場中所發現的技術的實際應用或技術改進、或致能本領域中的其他通常技術者了解本文所揭露的實施例。
10:半導體鰭件
11:邊緣
12:淺溝槽隔離區域
Claims (17)
- 一種半導體結構,包含:半導體基底;互連結構,包括被動裝置;虛置填充區域,配置在該被動裝置與該半導體基底之間,該虛置填充區域包括複數個淺溝槽隔離區域在該半導體基底中、複數個半導體鰭件、複數個閘極結構、複數個源極/汲極區域在該複數個半導體鰭件中、以及複數個接點配置在該複數個淺溝槽隔離區域上方;以及壕溝區域,在該虛置填充區域之下的該半導體基底中,其中,該壕溝區域含有小於或等於5x1015cm-3的摻質濃度。
- 如申請專利範圍第1項所述之半導體結構,其中,該半導體基底具有頂表面,該複數個淺溝槽隔離區域從該半導體基底的該頂表面延伸至第一深度,而該壕溝區域從該半導體基底的該頂表面延伸至大於該複數個淺溝槽隔離區域的該第一深度的第二深度。
- 如申請專利範圍第1項所述之半導體結構,其中,該複數個淺溝槽隔離區域圍繞該壕溝區域的複數個區段,該壕溝區域的該複數個區段分別地配置在該複數個半導體鰭件之下。
- 如申請專利範圍第1項所述之半導體結構,進一步包含:層間介電層,包括直接地配置在該複數個源極/汲極區域上方的複數個區段。
- 如申請專利範圍第4項所述之半導體結構,其中,該複數個源極/汲極區域未被該複數個接點接觸,並且該複數個接點僅配置在該複數個淺溝槽隔離區域上方。
- 如申請專利範圍第4項所述之半導體結構,其中,該複數個閘極結構是配置成與該複數個半導體鰭件重疊,該複數個源極/汲極區域是配置在該複數個閘極結構之間的該複數個半導體鰭件中,而該層間介電層的該複數個區段是分別地配置在該複數個閘極結構之間的該複數個源極/汲極區域上方。
- 如申請專利範圍第1項所述之半導體結構,其中,該被動裝置是從該虛置填充區域朝直立方向移位,該虛置填充區域包括第一複數個邊緣,而該被動裝置包括與該虛置填充區域的該第一複數個邊緣對準的第二複數個邊緣。
- 如申請專利範圍第7項所述之半導體結構,其中,該虛置填充區域的該第一複數個邊緣是朝兩個正交方向而與該被動裝置的該第二複數個邊緣對準。
- 如申請專利範圍第1項所述之半導體結構,其中,該複數個閘極結構是配置成與該複數個半導體鰭件和該複數個淺溝槽隔離區域重疊,而該複數個接點是分別地配置在該複數個閘極結構之間的該複數個淺溝槽隔離區域上方。
- 如申請專利範圍第1項所述之半導體結構,其中,該複數個接點具有與該複數個淺溝槽隔離區域的直接接觸關係。
- 如申請專利範圍第1項所述之半導體結構,其中,該被動裝置是薄膜電阻器。
- 一種形成半導體結構的方法,該方法包含:形成從半導體基底突出的複數個半導體鰭件;形成圍繞該複數個半導體鰭件的複數個淺溝槽隔離區域在該半導體基底中; 形成複數個源極/汲極區域在該複數個半導體鰭件中;形成複數個接點,配置在該複數個淺溝槽隔離區域上方;形成壕溝區域在由該複數個半導體鰭件、該複數個接點和該複數個淺溝槽隔離區域提供虛置填充區域之下的該半導體基底中;以及形成互連結構,該互連結構包括配置在該虛置填充區域上方的被動裝置,其中,該壕溝區域含有小於或等於5x1015cm-3的摻質濃度。
- 如申請專利範圍第12項所述之方法,進一步包含:形成層間介電層的區段,該層間介電層包括直接地配置在該複數個源極/汲極區域上方的複數個區段;以及形成複數個閘極結構,該複數個閘極結構配置成與該複數個半導體鰭件重疊,其中,該複數個源極/汲極區域是配置在該複數個閘極結構之間的該複數個半導體鰭件中,而該層間介電層的該複數個區段是配置在該複數個閘極結構之間的該複數個源極/汲極區域上方。
- 如申請專利範圍第12項所述之方法,其中,該被動裝置從該虛置填充區域朝直立方向移位,該虛置填充區域包括第一複數個邊緣,而該被動裝置包括朝兩個正交方向而與該虛置填充區域的該第一複數個邊緣對準的第二複數個邊緣。
- 如申請專利範圍第12項所述之方法,其中,該被動裝置是薄膜電阻器。
- 如申請專利範圍第12項所述之方法,進一步包含:形成複數個閘極結構,該複數個閘極結構配置成與該複數個半導體鰭件和該複數個淺溝槽隔離區域重疊, 其中,該複數個接點是配置在該複數個閘極結構之間的該複數個淺溝槽隔離區域上方。
- 如申請專利範圍第12項所述之方法,其中,該複數個接點具有與該複數個淺溝槽隔離區域的直接接觸關係。
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US9401358B1 (en) * | 2015-01-08 | 2016-07-26 | United Microelectronics Corp. | Semiconductor device structure |
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