JP6748381B2 - キャパシタ - Google Patents
キャパシタ Download PDFInfo
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- JP6748381B2 JP6748381B2 JP2019519149A JP2019519149A JP6748381B2 JP 6748381 B2 JP6748381 B2 JP 6748381B2 JP 2019519149 A JP2019519149 A JP 2019519149A JP 2019519149 A JP2019519149 A JP 2019519149A JP 6748381 B2 JP6748381 B2 JP 6748381B2
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- 239000003990 capacitor Substances 0.000 title claims description 81
- 239000000463 material Substances 0.000 claims description 88
- 239000000758 substrate Substances 0.000 claims description 40
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 29
- 229910052710 silicon Inorganic materials 0.000 claims description 29
- 239000010703 silicon Substances 0.000 claims description 29
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 12
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 11
- 230000001154 acute effect Effects 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 117
- 230000008646 thermal stress Effects 0.000 description 31
- 229920002120 photoresistant polymer Polymers 0.000 description 20
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000005530 etching Methods 0.000 description 9
- 238000001039 wet etching Methods 0.000 description 9
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 229920001721 polyimide Polymers 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 8
- 239000004642 Polyimide Substances 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 239000003989 dielectric material Substances 0.000 description 6
- 230000035882 stress Effects 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 238000001312 dry etching Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000001020 plasma etching Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-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
- 238000004380 ashing Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
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- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
- H01L28/82—Electrodes with an enlarged surface, e.g. formed by texturisation
- H01L28/90—Electrodes with an enlarged surface, e.g. formed by texturisation having vertical extensions
- H01L28/92—Electrodes with an enlarged surface, e.g. formed by texturisation having vertical extensions made by patterning layers, e.g. by etching conductive layers
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
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- 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
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
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- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
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- H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
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- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02208—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
- H01L21/02211—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound being a silane, e.g. disilane, methylsilane or chlorosilane
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- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
- H01L21/02236—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor
- H01L21/02238—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor silicon in uncombined form, i.e. pure silicon
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- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
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- 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
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- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—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 elements of Group IV of the Periodic Table
- H01L21/28525—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 elements of Group IV of the Periodic Table the conductive layers comprising semiconducting material
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- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
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- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
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- 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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
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Description
まず、図1〜図3を参照しつつ、本発明の第1実施形態に係るキャパシタ100の構成について説明する。図1は、第1実施形態に係るキャパシタの構成を概略的に示す平面図である。図2は、図1に示したキャパシタのII−II線に沿った断面の構成を概略的に示す断面図である。図3は、図2に示したキャパシタ断面の拡大断面図である。
第2実施形態として、図4〜図11を参照しつつ、キャパシタ200の製造方法について説明する。第2実施形態は、第1実施形態に係るキャパシタ100の製造方法に相当する。なお、以下の第2実施形態では、上記の第1実施形態と共通の事柄については記述を省略し、異なる点についてのみ説明する。特に、同様の構成による同様の作用効果については逐次言及しない。また、第1実施形態と同様の符号が付された構成は、第1実施形態における構成と同様の構成及び機能を有するものとする。
第3実施形態として、図12を参照しつつ、キャパシタ300の構成について説明する。図12は、第2実施形態に係るキャパシタの構成を概略的に示す断面図である。なお、以下の第3実施形態においても、第2実施形態と同様に、上記第1実施形態及び第2実施形態と共通の事柄については記述を省略し、異なる点についてのみ説明する。特に、同様の構成による同様の作用効果については逐次言及しない。また、第1実施形態と同様の符号が付された構成は、第1実施形態における構成と同様の構成及び機能を有するものとする。
101…第1部分
102…第2部分
110…基材
110A…第1主面
110B…第2主面
111…トレンチ構造部
112…凹状構造部
111A,112A…凸部
111B、112B…凹部
θ11,θ12,θ21,θ22…角度
120…第1電極層
130…誘電体膜
131…第1誘電体層
132…第2誘電体層
140…第2電極層
141…第1導電層
142…第2導電層
150…絶縁膜
Claims (10)
- 主面を有する基材と、
前記基材の前記主面側に設けられた誘電体膜と、
前記誘電体膜の上に設けられた電極層と
を備え、
前記基材は、前記基材の前記主面の法線方向から平面視したとき、前記電極層と重なる領域よりも外側の領域に形成された少なくとも1つの凹部からなる凹状構造部と、前記電極層と重なる領域に形成されたトレンチ構造部とを有し、
前記凹状構造部は、複数の凹部からなり、それぞれの凹部の間に位置する凸部を有し、
前記誘電体膜が前記凹状構造部及び前記トレンチ構造部の上に設けられる、キャパシタ。 - 前記基材の前記主面の法線方向から平面視したとき、前記凹状構造部は、前記電極層と重なる領域を囲むように形成される、
請求項1に記載のキャパシタ。 - 前記凹状構造部の凸部の角によって前記基材側に成される角度は、前記トレンチ構造部の凸部の角によって前記基材側に成される角度よりも小さい、
請求項1又は2に記載のキャパシタ。 - 前記凹状構造部の凹部の角によって前記基材とは反対側に成される角度は、前記トレンチ構造部の凹部の角によって前記基材とは反対側に成される角度よりも小さい、
請求項1から3のいずれか1項に記載のキャパシタ。 - 前記凹状構造部において凸部の角によって前記基材側に成される角度及び凹部の角によって前記基材とは反対側に成される角度のうち最小の角度は、トレンチ構造部において凸部の角によって前記基材側に成される角度及び凹部の角によって前記基材とは反対側に成される角度のうち最小の角度よりも小さい、
請求項1から4のいずれか1項に記載のキャパシタ。 - 前記凹状構造部の凸部の角は、鋭角である、
請求項1から5のいずれか1項に記載のキャパシタ。 - 前記凹状構造部の前記少なくとも1つの凹部の前記主面に対する深さは、前記トレンチ構造部の凹部の前記主面に対する深さよりも大きい、
請求項1から6のいずれか1項に記載のキャパシタ。 - 前記基材がシリコン基板を有し、
前記誘電体膜がシリコン窒化物を有する、
請求項1から7のいずれか1項に記載のキャパシタ。 - 前記主面の結晶方位が<100>と表される、
請求項1から8のいずれか1項に記載のキャパシタ。 - 前記誘電体膜は、前記凹状構造部の上に設けられた部分にクラックが形成される、
請求項1から9のいずれか1項に記載のキャパシタ。
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