JP2012522383A - 光焼結及び/またはレーザー焼結を強化するためのバッファ層 - Google Patents
光焼結及び/またはレーザー焼結を強化するためのバッファ層 Download PDFInfo
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- 238000000149 argon plasma sintering Methods 0.000 title claims description 18
- 229920001721 polyimide Polymers 0.000 claims abstract description 52
- 239000004642 Polyimide Substances 0.000 claims abstract description 48
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 229920000642 polymer Polymers 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 32
- 229910052802 copper Inorganic materials 0.000 claims description 31
- 239000010949 copper Substances 0.000 claims description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 30
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 239000010703 silicon Substances 0.000 claims description 21
- 239000002105 nanoparticle Substances 0.000 claims description 16
- 238000000151 deposition Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 description 29
- 239000000976 ink Substances 0.000 description 27
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 19
- 230000017525 heat dissipation Effects 0.000 description 5
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000002082 metal nanoparticle Substances 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- B22F3/10—Sintering only
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
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- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
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- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
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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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
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- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
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- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4664—Adding a circuit layer by thick film methods, e.g. printing techniques or by other techniques for making conductive patterns by using pastes, inks or powders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
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Abstract
Description
2.効果的な光焼結は、300nm未満のナノ粒子によってもたらされる。
3.基板の熱伝導率は、金属インクの光焼結に影響を及ぼし得る。基板の熱伝導率が低いほど、ナノ粒子膜の導電性が優れる。
4.高熱伝導性基板は、効果的な光焼結工程のために、ポリイミドまたはポリマーなどの低熱伝導性材料で被覆することによって、調整及び分離することができる。
5.熱散逸を分離するために必要なポリイミド被膜の厚さは、約1〜50マイクロメートルである。
6.レーザー焼結及び光焼結の両方によって、シリコンウエハなどの高熱伝導性材料上で銅インクが導電膜となることが実証された。
7.高熱伝導性シリコンウエハ上での熱散逸が、ウエハ上に被覆されたさまざまな厚さのポリイミドで示された。低熱伝導性材料は、熱散逸の速度を落とし、光またはレーザー焼結を強化するためのバッファ層として使用することができる。
8.銅インクは、光焼結では、1x10−5Ω・cmの抵抗を有するシリコンウエハ上に被覆されたポリイミドの場合、レーザー焼結では、4x10−6Ω・cmの場合に良好に焼結され得る。
9.ポリイミド材料は、高熱伝導性基板上で断熱材として利用して、銅インク光及びレーザー焼結の効果を増大させることができるだけでなく、低融点の基板に適用して焼結工程の間に熱的損傷から基板を保護する断熱材としても利用することができる。
10.ポリイミド層及び金属線層は、多層回路として数回繰り返すことができる。
11.ポリイミド層は、誘電材料として使用することができ、キャパシタとして組み込まれることができる。
12.ナノ−銅インクは、二次元及び三次元チップパッケージ用途におけるコンタクト金属として上層導体で使用することができる。
1102 金属材料
1103 低熱伝導性材料
1104 ビア
1105 導電インク
1106 インクジェット装置
1107 導電線
Claims (25)
- 基板上に導電線を堆積する方法であって、
前記基板上に金属層をパターン状に堆積するステップと、
パターン形成された前記金属層及び前記基板上に低熱伝導率を有する材料の層を被覆するステップと、
前記低熱伝導率を有する材料の層上に導電性インクの膜を堆積するステップと、
前記導電性インクの膜を焼結するステップと、
を含む方法。 - 前記低熱伝導率を有する材料の層を通るビアを形成することによって、前記パターン形成された金属層の一部分を露出させるステップをさらに含み、前記導電性インクの膜を堆積するステップが、導電性インクの膜を前記ビア内に堆積することによって、前記パターン化された金属層の前記部分を前記導電性インクの膜で被覆するステップを有し、前記パターン化された金属層の前記部分を被覆する前記導電性インクの膜もまた焼結される、請求項1に記載の方法。
- 前記パターン形成された金属層の前記部分上に被覆された導電性インクの膜が、前記低熱伝導率を有する材料の層上に被覆された導電性インクの膜よりも、焼結からのエネルギーを散逸しない、請求項2に記載の方法。
- 前記低熱伝導率を有する材料の層がポリマーを含む、請求項3に記載の方法。
- 前記低熱伝導率を有する材料の層がポリイミドを含む、請求項3に記載の方法。
- 前記ポリイミドが少なくとも50マイクロメートルの厚さを有する、請求項5に記載の方法。
- 前記焼結を光焼結装置で実施する、請求項5に記載の方法。
- 前記焼結をレーザー焼結装置で実施する、請求項5に記載の方法。
- 前記レーザー焼結装置が、830nmの波長及び800mWの出力を有する固体ダイオードを含む、請求項8に記載の方法。
- 前記固体ダイオードが直径15マイクロメートルの焦点ビームサイズを有する、請求項9に記載の方法。
- 前記ポリイミドが少なくとも5マイクロメートルの厚さを有する、請求項5に記載の方法。
- 前記ポリイミドが少なくとも2.3マイクロメートルの厚さを有する、請求項5に記載の方法。
- 前記基板がシリコンを含む、請求項5に記載の方法。
- 前記基板がセラミックを含む、請求項5に記載の方法。
- 前記基板が、前記低熱伝導率を有する材料の層より大きな熱伝導率を有する、請求項1に記載の方法。
- 前記導電性インクの膜が銅ナノ粒子を含む、請求項5に記載の方法。
- 基板と、
前記基板上に堆積された金属線のパターンと、
前記基板、及び前記基板上に堆積された前記金属線のパターンの上に被覆された低熱伝導性材料の層であって、前記金属線のパターンの部分上に前記低熱伝導性材料の層を通るビアが形成された、低熱伝導性材料の層と、
前記基板上に被覆された前記低熱伝導性材料の層上に被覆された焼結導電インクの膜であって、前記焼結導電インクの膜が、前記低熱伝導性材料の層を通って形成されたビア内の金属線のパターンの部分上に被覆された、焼結導電インクの膜と、
を含む電子回路。 - 前記基板が前記低熱伝導性材料の層より大きな熱伝導率を有する、請求項17に記載の電子回路。
- 前記低熱伝導性材料の層がポリイミドを含む、請求項18に記載の電子回路。
- 前記ポリイミドが少なくとも50マイクロメートルの厚さを有する、請求項19に記載の電子回路。
- 前記焼結導電性インクが、光焼結装置で焼結された焼結銅ナノ粒子を含む、請求項19に記載の電子回路。
- 前記焼結導電性インクが、レーザー焼結装置で焼結された焼結銅ナノ粒子を含む、請求項19に記載の電子回路。
- 前記ポリイミドが少なくとも5マイクロメートルの厚さを有する、請求項19に記載の電子回路。
- 前記ポリイミドが少なくとも2.3マイクロメートルの厚さを有する、請求項19に記載の電子回路。
- 前記基板がシリコンを含む、請求項19に記載の電子回路。
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KR20120013350A (ko) | 2012-02-14 |
US20140057428A1 (en) | 2014-02-27 |
JP5740389B2 (ja) | 2015-06-24 |
CN102365713B (zh) | 2015-11-25 |
US8647979B2 (en) | 2014-02-11 |
WO2010111581A1 (en) | 2010-09-30 |
TWI492303B (zh) | 2015-07-11 |
EP2412007B1 (en) | 2020-07-22 |
EP2412007A4 (en) | 2014-11-12 |
CN102365713A (zh) | 2012-02-29 |
EP2412007A1 (en) | 2012-02-01 |
KR101735710B1 (ko) | 2017-05-15 |
US9131610B2 (en) | 2015-09-08 |
US20120049384A1 (en) | 2012-03-01 |
TW201106426A (en) | 2011-02-16 |
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