JP7308819B2 - タングステン酸化還元による、シームのないタングステン充填 - Google Patents
タングステン酸化還元による、シームのないタングステン充填 Download PDFInfo
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- JP7308819B2 JP7308819B2 JP2020518598A JP2020518598A JP7308819B2 JP 7308819 B2 JP7308819 B2 JP 7308819B2 JP 2020518598 A JP2020518598 A JP 2020518598A JP 2020518598 A JP2020518598 A JP 2020518598A JP 7308819 B2 JP7308819 B2 JP 7308819B2
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- 229910052721 tungsten Inorganic materials 0.000 title claims description 114
- 239000010937 tungsten Substances 0.000 title claims description 114
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 113
- 239000000758 substrate Substances 0.000 claims description 131
- 239000000463 material Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 46
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 25
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 25
- 230000003647 oxidation Effects 0.000 claims description 18
- 238000007254 oxidation reaction Methods 0.000 claims description 18
- 238000000151 deposition Methods 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 16
- 229910052710 silicon Inorganic materials 0.000 claims description 16
- 239000010703 silicon Substances 0.000 claims description 16
- 238000011946 reduction process Methods 0.000 claims description 11
- 238000000231 atomic layer deposition Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 7
- 239000003989 dielectric material Substances 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 4
- -1 tungsten halide Chemical class 0.000 claims description 4
- 238000005229 chemical vapour deposition Methods 0.000 claims description 2
- 210000002381 plasma Anatomy 0.000 description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 230000008021 deposition Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical compound C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 150000002429 hydrazines Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000376 reactant 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
- 239000011800 void material Substances 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910020177 SiOF Inorganic materials 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical class B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 229940104869 fluorosilicate Drugs 0.000 description 1
- 230000014509 gene expression Effects 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
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910021426 porous silicon Inorganic materials 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
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- 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
- H01L21/76838—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 conductors
- H01L21/76886—Modifying permanently or temporarily the pattern or the conductivity of conductive members, e.g. formation of alloys, reduction of contact resistances
- H01L21/76888—By rendering at least a portion of the conductor non conductive, e.g. oxidation
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- 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
- H01L21/76838—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 conductors
- H01L21/76877—Filling of holes, grooves or trenches, e.g. vias, with conductive material
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- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—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
- 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
- H01L21/0228—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 deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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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
- H01L21/28—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
- H01L21/28512—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
- H01L21/28556—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 by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
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- 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
- H01L21/76805—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 the opening being a via or contact hole penetrating the underlying conductor
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- 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
- H01L21/76838—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 conductors
- H01L21/7684—Smoothing; Planarisation
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- 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
- H01L21/76838—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 conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76871—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers
- H01L21/76876—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers for deposition from the gas phase, e.g. CVD
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- 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
- H01L21/76838—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 conductors
- H01L21/76885—By forming conductive members before deposition of protective insulating material, e.g. pillars, studs
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- 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
- H01L21/76838—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 conductors
- H01L21/76895—Local interconnects; Local pads, as exemplified by patent document EP0896365
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- 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
- H01L21/02244—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 a metallic layer
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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
- 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
- H01L23/53204—Conductive materials
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Description
Claims (13)
- 基板の処理方法であって、
第1の材料の第1の基板表面及び第2の材料の第2の基板表面を基板に設けることであって、前記基板は、側壁及び底部を有する少なくとも1つのフィーチャを有し、前記側壁は前記第1の基板表面により形成され、前記底部は前記第2の基板表面により形成される、第1の材料の第1の基板表面及び第2の材料の第2の基板表面を基板に設けることと、
前記基板にタングステン膜を形成することであって、前記タングステン膜は、前記フィーチャの範囲内に形成されたシームと、前記フィーチャより外側の前記第1の基板表面に形成された表皮とを有する、タングステン膜を形成することと、
前記タングステン膜の頂面が前記フィーチャより外側の前記第1の基板表面とほぼ同一平面上となるように前記第1の基板表面から前記表皮を除去するために、前記第1の基板表面を平坦化することと、
前記タングステン膜を酸化させて、シームが無い状態で前記少なくとも1つのフィーチャから延在する酸化タングステン柱状部を形成することと、
前記酸化タングステン柱状部をタングステンに還元することであって、前記タングステンは、タングステンの間隙充填の頂面が、前記フィーチャより外側の前記第1の基板表面より下方に存在するように、前記少なくとも1つのフィーチャの範囲内に、実質的にシームのない前記タングステンの間隙充填を形成する、タングステンに還元することと、
前記フィーチャより外側の前記第1の基板表面と実質的に同一平面となるように前記タングステンの間隙充填の前記頂面を上昇させるために、前記タングステンの間隙充填上に追加的なタングステンを選択的に堆積させること
を含む、方法。 - 基板の処理方法であって、
基板表面に形成される少なくとも1つのフィーチャを基板に備えることであって、前記フィーチャは、前記基板表面から或る一定の長さで延在し、かつ側壁及び底部を有し、前記フィーチャの前記側壁及び前記基板表面は第1の材料を含み、前記底部は前記第1の材料とは異なる第2の材料を含む、基板表面に形成される少なくとも1つのフィーチャを基板に備えることと、
前記少なくとも1つのフィーチャの範囲内のタングステン膜の範囲内のボイドと、前記基板表面に形成されたタングステンの表皮と、が存在するように、前記基板にタングステン膜を形成することと、
前記タングステン膜の頂面が前記基板表面と実質的に同一平面上にあるように前記基板表面から前記タングステンの表皮を除去するために、前記基板を平坦化することと、
前記タングステン膜を酸化させて、シームが無い状態で前記少なくとも1つのフィーチャから延在する酸化タングステン柱状部を形成することと、
前記酸化タングステン柱状部を還元して、前記少なくとも1つのフィーチャの範囲内に、実質的にシームのないタングステンの間隙充填を形成することであって、前記タングステンの間隙充填の頂面が、前記フィーチャより外側の前記基板表面より下方に存在する、前記タングステンの間隙充填を形成することと、
前記フィーチャより外側の前記基板表面と実質的に同一平面となるように前記タングステンの間隙充填の前記頂面を上昇させるために、前記タングステンの間隙充填上に追加的なタングステンを選択的に堆積させること
を含む、方法。 - 前記第1の材料及び前記第2の材料のうちの一方は誘電材料を含み、前記第1の材料及び前記第2の材料のうちの他方は導電性材料を含む、請求項1又は2に記載の方法。
- 前記タングステン膜の前記形成は、原子層堆積プロセス又は化学蒸着プロセスの1つ以上により実施される、請求項1又は2に記載の方法。
- 前記少なくとも1つのフィーチャの範囲内に形成された前記シームは閉じている、請求項1又は2に記載の方法。
- 前記少なくとも1つのフィーチャの範囲内に形成された前記シームの上端が、当該シームの前記上端が平坦化の後に除去されるように、前記側壁より上方に存在する、請求項1又は2に記載の方法。
- 前記タングステン膜は、熱酸化を通じて酸化される、請求項1又は2に記載の方法。
- 前記タングステン膜は、プラズマ酸化を通じて酸化される、請求項1又は2に記載の方法。
- 前記酸化タングステン柱状部を還元することは、熱還元プロセスを含む、請求項1又は2に記載の方法。
- 前記酸化タングステン柱状部を還元することは、プラズマ還元プロセスを含む、請求項1又は2に記載の方法。
- 前記酸化タングステン柱状部が還元された後で、前記タングステンの間隙充填の前記頂面は、10Å以内で、前記フィーチャより外側の前記第1の基板表面と同一平面上に存在する、請求項1に記載の方法。
- 追加的なタングステンを選択的に堆積させることは、前記タングステンの間隙充填上にシリコン膜を堆積させること、及び、前記シリコン膜をハロゲン化タングステンに晒して前記シリコン膜をタングステンに変換することを含む、請求項1又は2に記載の方法。
- 基板の処理方法であって、
第1の材料の第1の基板表面及び第2の材料の第2の基板表面を基板に設けることであって、前記第1の材料は誘電材料を含み、前記第2の材料は導電性材料を含み、前記基板は側壁及び底部を有する少なくとも1つのフィーチャを有し、前記側壁は前記第1の基板表面により形成され、前記底部は前記第2の基板表面により形成される、第1の材料の第1の基板表面及び第2の材料の第2の基板表面を基板に設けることと、
原子層堆積により前記基板にタングステン膜を形成することであって、前記タングステン膜は、前記フィーチャの範囲内に形成された閉じたシームと、前記フィーチャより外側の前記第1の基板表面に形成された表皮とを有し、前記シームの上端が前記側壁より上方に存在する、タングステン膜を形成することと、
前記タングステン膜の頂面が前記フィーチャより外側の前記第1の基板表面とほぼ同一平面上となり且つ前記シームの前記上端が除去されるように前記第1の基板表面から前記表皮を除去するために、前記第1の基板表面を平坦化することと、
熱酸化プロセス又はプラズマ酸化プロセスにより、前記タングステン膜を酸化させて、シームが無い状態で前記フィーチャから延在する酸化タングステン柱状部を形成することと、
熱還元プロセス又はプラズマ還元プロセスにより、前記酸化タングステン柱状部をタングステンに還元することであって、前記タングステンが、前記フィーチャの範囲内に、実質的にシームのないタングステンの間隙充填を形成し、前記タングステンの間隙充填の頂面が、前記フィーチャより外側の前記第1の基板表面より下方の約10Å以下のところに存在する、前記酸化タングステン柱状部をタングステンに還元することと、
前記フィーチャより外側の前記第1の基板表面と実質的に同一平面上にあるように前記タングステンの間隙充填の前記頂面を上昇させるために、追加的なタングステンを前記タングステンの間隙充填上に堆積させることであって、前記タングステンの間隙充填上にシリコン膜を堆積させ、前記シリコン膜をハロゲン化タングステンに晒して、前記シリコン膜をタングステンに変換させることにより、追加的なタングステンを前記タングステンの間隙充填上に堆積させること
を含む、方法。
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