JP2022528719A - 低抵抗率を有する銅部品を製造するための光造形プロセス - Google Patents
低抵抗率を有する銅部品を製造するための光造形プロセス Download PDFInfo
- Publication number
- JP2022528719A JP2022528719A JP2021559867A JP2021559867A JP2022528719A JP 2022528719 A JP2022528719 A JP 2022528719A JP 2021559867 A JP2021559867 A JP 2021559867A JP 2021559867 A JP2021559867 A JP 2021559867A JP 2022528719 A JP2022528719 A JP 2022528719A
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- Prior art keywords
- resin
- copper
- paste
- heat treatment
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 53
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- 239000011347 resin Substances 0.000 claims abstract description 48
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 239000012298 atmosphere Substances 0.000 claims abstract description 41
- 229910052802 copper Inorganic materials 0.000 claims abstract description 41
- 239000010949 copper Substances 0.000 claims abstract description 41
- 239000002245 particle Substances 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 239000000654 additive Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 239000002243 precursor Substances 0.000 claims abstract description 24
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 230000001590 oxidative effect Effects 0.000 claims abstract description 17
- 239000007800 oxidant agent Substances 0.000 claims abstract description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 23
- -1 polypropylene Polymers 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 230000001588 bifunctional effect Effects 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 13
- 229920001155 polypropylene Polymers 0.000 claims description 13
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 claims description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 229910001882 dioxygen Inorganic materials 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- XRMBQHTWUBGQDN-UHFFFAOYSA-N [2-[2,2-bis(prop-2-enoyloxymethyl)butoxymethyl]-2-(prop-2-enoyloxymethyl)butyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(CC)COCC(CC)(COC(=O)C=C)COC(=O)C=C XRMBQHTWUBGQDN-UHFFFAOYSA-N 0.000 claims description 5
- 229920000123 polythiophene Polymers 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000003999 initiator Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 abstract description 27
- 241000790917 Dioxys <bee> Species 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 238000009472 formulation Methods 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 229910052799 carbon Inorganic materials 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 10
- 230000008018 melting Effects 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- 239000003085 diluting agent Substances 0.000 description 6
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- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 2
- QKTWWGYCVXCKOJ-UHFFFAOYSA-N 2-methoxy-1-(2-methoxyphenyl)-2-phenylethanone Chemical compound C=1C=CC=CC=1C(OC)C(=O)C1=CC=CC=C1OC QKTWWGYCVXCKOJ-UHFFFAOYSA-N 0.000 description 2
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 2
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002118 epoxides Chemical class 0.000 description 2
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical class OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- ZDHCZVWCTKTBRY-UHFFFAOYSA-N omega-Hydroxydodecanoic acid Natural products OCCCCCCCCCCCC(O)=O ZDHCZVWCTKTBRY-UHFFFAOYSA-N 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 238000002411 thermogravimetry Methods 0.000 description 2
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- OTKCEEWUXHVZQI-UHFFFAOYSA-N 1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(=O)CC1=CC=CC=C1 OTKCEEWUXHVZQI-UHFFFAOYSA-N 0.000 description 1
- UHFFVFAKEGKNAQ-UHFFFAOYSA-N 2-benzyl-2-(dimethylamino)-1-(4-morpholin-4-ylphenyl)butan-1-one Chemical compound C=1C=C(N2CCOCC2)C=CC=1C(=O)C(CC)(N(C)C)CC1=CC=CC=C1 UHFFVFAKEGKNAQ-UHFFFAOYSA-N 0.000 description 1
- LWRBVKNFOYUCNP-UHFFFAOYSA-N 2-methyl-1-(4-methylsulfanylphenyl)-2-morpholin-4-ylpropan-1-one Chemical compound C1=CC(SC)=CC=C1C(=O)C(C)(C)N1CCOCC1 LWRBVKNFOYUCNP-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- GUCYFKSBFREPBC-UHFFFAOYSA-N [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C(=O)C1=C(C)C=C(C)C=C1C GUCYFKSBFREPBC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
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- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
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- 125000003976 glyceryl group Chemical group [H]C([*])([H])C(O[H])([H])C(O[H])([H])[H] 0.000 description 1
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- 239000003345 natural gas Substances 0.000 description 1
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- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical class [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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Images
Classifications
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
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- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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Abstract
Description
- 製造後、部品に残留応力が存在し、熱機械的応力を解放するために以後の熱処理を行う必要があること、
- 成分の蒸発による局所的組成の変化、
- 表面品質が低く、研磨工程が必要となること、
- 最適な層化を実行するために特定の粒度分布の粉末を必要とし、原料購入に無視できない規模のコストが生じること、
- 研磨及び洗浄工程における粉末の管理及び取り扱いがあり、したがって、健康、安全性及び環境の点で特定の注意を要すること。
a)光造形により部品を造形する工程であって、造形は、
a1)銅粒子の粉末、第1の樹脂の1種又は複数の光重合性前駆体、光開始剤及び場合によっては光学添加剤を含むペースト層を形成する工程、
a2)第1の樹脂の光重合性前駆体を光重合する工程
によって実行され、工程a1)及びa2)は、複数回繰り返し得るサイクルを形成する、工程、
b)第1の雰囲気中で、第1の温度Tdにて、第1の熱処理を実行し、第1の樹脂を除去する工程、
c)第2の雰囲気中で、第1の温度Tdより高い第2の温度Tfにて、第2の熱処理を実行し、銅粒子を焼結して銅部品を得る工程
を含み、
第1の雰囲気は、少なくとも10容積%の酸化剤、例えば二酸素を含有する酸化性雰囲気からなり、第2の雰囲気は、還元性雰囲気からなる、
3Dプリンティングによる銅部品の製造方法、特に光造形によって、達成される。
- 銅粒子の粉末、
- 第1の樹脂の複数の光重合性前駆体、
- 光開始剤、及び
- 場合により、シリカ、ポリチオフェン、ポリビニルアルコール、ポリプロピレン、及び事前に架橋され粉砕された第2の樹脂から選択される光学添加剤、四官能性アクリレート及び二官能性アクリレートからなる光重合性前駆体並びに2,2-ジメトキシ-2-フェニルアセトフェノンからなる光開始剤
を含むペーストにも関する。
a)光造形により部品を造形する工程であって、造形は、
a1)銅粉末、光重合性樹脂、光開始剤、並びに場合によって光学添加剤及び/又は反応性希釈剤を含む、ペースト層を形成する工程、
a2)第1の樹脂の光重合性前駆体を光重合し、第1の樹脂を形成する工程
によって実行され、工程a1)及びa2)は、複数回繰り返し得るサイクルを形成する、工程、
b)少なくとも10容積%の酸化剤を含有する酸化性雰囲気中で、部品上で第1の温度Tdにて第1の熱処理を実行し、第1の樹脂を除去する工程、
c)還元性雰囲気中で、第1の温度Tdより高い第2の温度Tfにて、第2の熱処理を実行し、銅粒子を焼結して銅部品を得る工程
を含む。
部品は、工程a)において、光造形により造形される。すなわち、複数のペースト層の順次的重合によって得られる。
Rは、多価の基、例えば炭化水素、ポリアルキルエーテル、又はアルコキシル化ポリオール型の基であり;
Mは、R基に応じた整数である。
- 80~95質量%、好ましくは90~95質量%の銅粒子、
- 0.1~5質量%、好ましくは0.1~1質量%の1種又は複数の光開始剤、
- 2~15質量%、好ましくは2~10質量%の樹脂の1種又は複数の光重合性前駆体、例えば、四官能性前駆体と二官能性前駆体の混合物、
- 場合によって、0.1~10質量%、好ましくは0.5~1質量%の光学添加剤、
- 場合によって、1~5質量%、好ましくは1~2質量%の反応性希釈剤
を含む。
造形(工程a)において、樹脂は、未加工部品(グリーンパーツとも呼ばれる)へのバインダーとしての役割を果たし、粘着力を確保する。
最初に、異なるペースト(配合物)を調製する。使用する銅粒子は、Ecka社によって販売されるものであり、粒径は<45μmである。
- HDDA (Sigma aldrich社) 1.7質量%
- 四官能性オリゴアクリレート(Sartomer社 SR355) 4.9質量%
- 三官能性オリゴアクリレート(Sartomer社 CN509) 1.7質量%
- 2-メチル-4’-メチルチオ-2-モルフォリノプロピオフェノン(Sigma Aldrich社) 0.2質量%
- フェニルビス(2,4,6-トリメチル-ベンゾイル)ホスフィンオキシド(Sigma Aldrich社) 0.2質量%
- 樹脂中90.8質量%(すなわち54容積%)の銅
- 0.5質量%の光学添加剤
- HDDA (Sigma aldrich社) 1.3質量%
- 四官能性オリゴアクリレート(Sartomer社 SR355) 2.2質量%
- 三官能性オリゴアクリレート(Sartomer社 CN509) 1.3質量%
- アクリレートアミン(Sartomer社 CN371EU) 2.2質量%
- メチル-4’-メチルチオ-2-モルフォリノプロピオフェノン(Sigma Aldrich社) 0.2質量%
- フェニルビス(2,4,6-トリメチル-ベンゾイル)ホスフィンオキシド(Sigma Aldrich社) 0.2質量%
- 樹脂中92.2質量%(すなわち58.6容積%)の銅
- 0.5質量%の光学添加剤
- HDDA (Sigma aldrich社) 1.5質量%
- 四官能性オリゴアクリレート(Sartomer社 SR355) 4.2質量%
- 二官能性オリゴアクリレート(Diacryl 101) 1.4質量%
- メチル-4’-メチルチオ-2-モルフォリノプロピオフェノン(Sigma Aldrich社) 0.2質量%
- フェニルビス(2,4,6-トリメチル-ベンゾイル)ホスフィンオキシド(Sigma Aldrich社) 0.2質量%
- 樹脂中92.5質量%(60容積%に相当する)の銅
- HDDA (Sigma aldrich社) 1.5質量%
- 四官能性オリゴアクリレート(Sartomer社 SR355) 4.2質量%
- 二官能性オリゴアクリレート(Diacryl 101) 1.4質量%
- 2,2-ジメトキシ-2-フェニルアセトフェノン0.4質量%
- 樹脂中92.5質量%(60容積%に相当する)の銅
Claims (17)
- 少なくとも以下の順次的工程:
a)光造形により部品を造形する工程であって、前記造形は、
a1)銅粒子の粉末、第1の樹脂の1種又は複数の光重合性前駆体、光開始剤、及び場合によって光学添加剤を含む、ペースト層を形成する工程、
a2)前記第1の樹脂の前記光重合性前駆体を光重合する工程、
によって実行され、工程a1)及びa2)は、複数回繰り返し得るサイクルを形成する、工程、
b)第1の雰囲気中で、第1の温度Tdにて、第1の熱処理を実行し、前記第1の樹脂を除去する工程、
c)第2の雰囲気中で、前記第1の温度Tdより高い第2の温度Tfにて、第2の熱処理を実行し、前記銅粒子を焼結して銅部品を得る工程
を含む銅部品を製造する方法であって、
前記第1の雰囲気は、少なくとも10容積%の酸化剤、例えば二酸素を含有する酸化性雰囲気からなり、前記第2の雰囲気は、還元性雰囲気からなることを特徴とする、方法。 - 前記第1の雰囲気が、少なくとも15容積%の二酸素を含有することを特徴とする、請求項1に記載の方法。
- 前記第1の雰囲気が、空気からなることを特徴とする、請求項1又は2に記載の方法。
- 前記第2の雰囲気が、二水素又は二水素とアルゴンの混合物からなることを特徴とする、請求項1から3のいずれか一項に記載の方法。
- 前記第1の熱処理が、300~800℃の温度で実行されることを特徴とする、請求項1から4のいずれか一項に記載の方法。
- 前記第1の熱処理が、2~7時間にわたって実行されることを特徴とする、請求項1から5のいずれか一項に記載の方法。
- 前記第2の熱処理が、980~1080℃の温度で実行されることを特徴とする、請求項1から6のいずれか一項に記載の方法。
- 前記第2の熱処理が、1~7時間、好ましくは1~4時間にわたって実行されることを特徴とする、請求項1から7のいずれか一項に記載の方法。
- 前記第1の樹脂の前記光重合性前駆体が、四官能性アクリレート及び二官能性アクリレートであることを特徴とする、請求項1から8のいずれか一項に記載の方法。
- 前記ペーストが、四官能性アクリレート、二官能性アクリレート及び2,2-ジメトキシ-2-フェニルアセトフェノンを含むことを特徴とする、請求項1から9のいずれか一項に記載の方法。
- 前記四官能性アクリレート/前記二官能性アクリレートの質量比が、1~5の範囲、好ましくは2~4の範囲にあり、例えば3となることを特徴とする、請求項9又は10に記載の方法。
- 前記四官能性アクリレートが、ジ(トリメチロールプロパン)テトラアクリレートであり、前記二官能性アクリレートが、ビスフェノールAエトキシレートジメタクリレートであることを特徴とする、請求項9から11のいずれか一項に記載の方法。
- 前記銅粉末が、前記ペーストの少なくとも35容積%、好ましくは35~65容積%を占めることを特徴とする、請求項1から12のいずれか一項に記載の方法。
- 前記光学添加剤が、シリカ、ポリチオフェン、ポリビニルアルコール、ポリプロピレン、及び事前に架橋され粉砕された第2の樹脂から選択されることを特徴とする、請求項1から13のいずれか一項に記載の方法。
- 光造形方法において使用して、銅部品を製造することを意図しており、
- 銅粒子の粉末、
- 第1の樹脂の光重合性前駆体、
- 光開始剤、並びに
- 場合により、光学添加剤、好ましくは、シリカ、ポリチオフェン、ポリビニルアルコール、ポリプロピレン、及び事前に架橋され粉砕された第2の樹脂から選択される光学添加剤、
を含むペーストであって、
前記光重合性前駆体が、四官能性アクリレート及び二官能性アクリレートからなり、前記光開始剤が、2,2-ジメトキシ-2-フェニルアセトフェノンからなることを特徴とする、ペースト。 - 前記四官能性アクリレート/前記二官能性アクリレートの質量比が、1~5の範囲、好ましくは2~4の範囲にあり、例えば3となることを特徴とする、請求項15に記載の方法。
- 前記四官能性アクリレートが、ジ(トリメチロールプロパン)テトラアクリレートであり、前記二官能性アクリレートが、ビスフェノールAエトキシレートジメタクリレートであることを特徴とする、請求項15又は16に記載のペースト。
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