JP5264939B2 - パッケージ部品及び半導体パッケージ - Google Patents
パッケージ部品及び半導体パッケージ Download PDFInfo
- Publication number
- JP5264939B2 JP5264939B2 JP2011006363A JP2011006363A JP5264939B2 JP 5264939 B2 JP5264939 B2 JP 5264939B2 JP 2011006363 A JP2011006363 A JP 2011006363A JP 2011006363 A JP2011006363 A JP 2011006363A JP 5264939 B2 JP5264939 B2 JP 5264939B2
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- Prior art keywords
- plating layer
- package
- package component
- rough
- component according
- 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.)
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 136
- 239000010410 layer Substances 0.000 claims abstract description 255
- 239000011347 resin Substances 0.000 claims abstract description 80
- 229920005989 resin Polymers 0.000 claims abstract description 80
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 239000012790 adhesive layer Substances 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000007747 plating Methods 0.000 claims description 293
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 111
- 239000010949 copper Substances 0.000 claims description 36
- 229910052802 copper Inorganic materials 0.000 claims description 36
- 239000004020 conductor Substances 0.000 claims description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 239000000956 alloy Substances 0.000 claims description 23
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 22
- 239000010931 gold Substances 0.000 claims description 20
- 229910052759 nickel Inorganic materials 0.000 claims description 20
- 229910045601 alloy Inorganic materials 0.000 claims description 19
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 15
- 229910052709 silver Inorganic materials 0.000 claims description 15
- 239000004332 silver Substances 0.000 claims description 15
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 12
- 229910052737 gold Inorganic materials 0.000 claims description 12
- 230000003746 surface roughness Effects 0.000 claims description 11
- 229910052763 palladium Inorganic materials 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000011135 tin Substances 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims 5
- 239000000203 mixture Substances 0.000 abstract description 7
- 239000007888 film coating Substances 0.000 abstract 1
- 238000009501 film coating Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 61
- 238000000034 method Methods 0.000 description 48
- 239000002585 base Substances 0.000 description 27
- 238000005259 measurement Methods 0.000 description 19
- 238000001878 scanning electron micrograph Methods 0.000 description 16
- 238000012545 processing Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000009713 electroplating Methods 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 238000005211 surface analysis Methods 0.000 description 8
- 229910000881 Cu alloy Inorganic materials 0.000 description 7
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- KERTUBUCQCSNJU-UHFFFAOYSA-L nickel(2+);disulfamate Chemical compound [Ni+2].NS([O-])(=O)=O.NS([O-])(=O)=O KERTUBUCQCSNJU-UHFFFAOYSA-L 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 229910021585 Nickel(II) bromide Inorganic materials 0.000 description 3
- -1 copper metals Chemical class 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- IPLJNQFXJUCRNH-UHFFFAOYSA-L nickel(2+);dibromide Chemical compound [Ni+2].[Br-].[Br-] IPLJNQFXJUCRNH-UHFFFAOYSA-L 0.000 description 3
- 238000007788 roughening Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 229960004643 cupric oxide Drugs 0.000 description 1
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- 238000000635 electron micrograph Methods 0.000 description 1
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- 239000008187 granular material Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- 230000008439 repair process Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 210000002374 sebum Anatomy 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- 229960002218 sodium chlorite Drugs 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/321—Disposition
- H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/32225—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
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- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45117—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 400°C and less than 950°C
- H01L2224/45124—Aluminium (Al) as principal constituent
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- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
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- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45144—Gold (Au) as principal constituent
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- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
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- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H01L2224/48505—Material at the bonding interface
- H01L2224/48599—Principal constituent of the connecting portion of the wire connector being Gold (Au)
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- H01L2224/48699—Principal constituent of the connecting portion of the wire connector being Aluminium (Al)
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- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73201—Location after the connecting process on the same surface
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- H01L2224/73204—Bump and layer connectors the bump connector being embedded into the layer connector
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Description
前記パッケージ部品が、導体基材と、その表面を部分的もしくは全体的に被覆した導電性皮膜とからなり、かつ
前記導電性皮膜が、前記被覆面において、粗面化された表面プロファイルをもった粗面めっき層からなることを特徴とするパッケージ部品にある。
チオシアン酸ナトリウム 15g/L
塩化アンモニウム 30g/L
pH 4.5〜5.5
浴温 常温(約25℃)
処理時間 約15秒間〜約30分間
陰極電流密度 約1〜3A/cm2
硼酸 30g/L
臭化ニッケル 10g/L
pH 3.0〜4.0
浴温 約30〜50℃
処理時間 約15秒間〜約30分間
陰極電流密度 約3〜30A/cm2
(1)導体基材上に順に形成された、下地めっき層(例えば、平滑面めっき層)及び粗面めっき層の組み合わせ、
(2)導体基材上に順に形成された、粗面めっき層及び表面めっき層の組み合わせ、
(3)導体基材上に順に形成された、下地めっき層(例えば、平滑面めっき層)、粗面めっき層及び表面めっき層の組み合わせ、
などを挙げることができる。多層構造(1)において、粗面めっき層を「表面めっき層」ということもできる。なお、下地めっき層は、存在もしくは不存在のいずれであってもよいけれども、もしも存在させる場合には、工数及びコストの削減などを考慮して、非被覆層に形成される平滑面めっき層を利用するのが好ましい。
パッケージ部品が放熱板である別の半導体パッケージもある。このような半導体パッケージの例として、半導体素子が配線基板上に搭載されており、該配線基板に接着剤層を介して放熱板が接合されているタイプの半導体パッケージを挙げることができる。
水酸化ナトリウム(NaOH) 5〜60g/L
リン酸三ナトリウム(Na3PO4) 0〜200g/L
浴温 約50〜100℃
処理時間 約5秒間〜約5分間
電流密度 約0〜10A/dm2
例えば、それぞれニッケルからなる粗面めっき層及び平滑面めっき層は、図10及び図11に模式的に示すようなめっき処理装置を使用して有利に実施することができる。
粗面Niめっき層の形成:
微量の鉄(Fe)を含有する銅合金材(商品名「CDA194」)をサンプルとして用意し、その片面に粗面Niめっき層を異なる膜厚で電解めっきし、下記の4種類のサンプルを作製した。
サンプルB:膜厚1.0μm
サンプルC:膜厚3.0μm
サンプルD:膜厚5.0μm
塩化ニッケルめっき浴:
塩化ニッケル 75g/L
チオシアン酸ナトリウム 15g/L
塩化アンモニウム 30g/L
pH: 約4.5〜5.5
浴温: 常温(約25℃)
陰極電流密度: 約1〜3A/cm2
(A)走査電子顕微鏡(SEM、×10,000)による表面形態の観察、
(B)走査電子顕微鏡(SEM、×5,000)による断面状態の観察、及び
(C)原子間力顕微鏡(AFM)による表面状態の解析
を行うとともに、平均表面粗さRaも求めた。AFMは、測定範囲:10μm2で実施した。これらの測定結果は、図12〜図15に示され、また、下記の第1表にまとめられている。
図13…サンプルB(Ni膜厚:1.0μm)
図14…サンプルC(Ni膜厚:3.0μm)
図15…サンプルD(Ni膜厚:5.0μm)
平滑面Niめっき層の形成:
微量の鉄(Fe)を含有する銅合金材(商品名「CDA194」)をサンプルとして用意し、その片面に平滑面Niめっき層を異なる膜厚で電解めっきし、下記の4種類のサンプルを作製した。
サンプルII:膜厚1.0μm
サンプルIII:膜厚3.0μm
サンプルIV:膜厚5.0μm
スルファミン酸ニッケル 320g/L
硼酸 30g/L
臭化ニッケル 10g/L
pH: 約3.0〜4.0
浴温: 約30〜50℃
陰極電流密度: 約3〜30A/cm2
(A)走査電子顕微鏡(SEM、×10,000)による表面形態の観察、
(B)走査電子顕微鏡(SEM、×5,000)による断面状態の観察、及び
(C)原子間力顕微鏡(AFM)による表面状態の解析
を行うとともに、平均表面粗さRaも求めた。AFMは、測定範囲:10μm2で実施した。これらの測定結果は、図16〜図19に示され、また、下記の第1表にまとめられている。
図17…サンプルII(Ni膜厚:1.0μm)
図18…サンプルIII(Ni膜厚:3.0μm)
図19…サンプルIV(Ni膜厚:5.0μm)
カップせん断強さの測定:
本例では、前記実施例1で作製したサンプルA〜D及び前記実施例2で作製したサンプルI〜IVについて、SEMI標準規格G69−0996に規定される手順に従ってカップせん断強さを測定し、粗面Niめっき層及び平滑面Niめっき層に対する樹脂の密着性を評価した。
封止樹脂A…OCNタイプ(N社製)
封止樹脂B…BNLタイプ(H社製)
から成形した。カップ21を図22(B)に示すようにサンプル(リードフレーム)1の上に載置し、175℃で6時間にわたって加熱(ポストキュア)した。
本例では、それぞれ3層構造をもった粗面Niめっき層及び平滑面Niめっき層に対する樹脂の密着性をカップせん断強さで評価した。
前記実施例2に記載の手法に従って、銅合金材(商品名「CDA194」)の片面に平滑面Niめっき層を異なる膜厚(0.3,0.5,0.7,1.0,1.2,1.5及び2.0μm)で電解めっきした。次いで、図25(A)に示すように、形成された平滑面Niめっき層の上に膜厚0.05μmのパラジウム(Pd)めっき層と膜厚0.005μmの金(Au)めっき層を順次形成した。Auめっき層の表面は、Niめっき層と同様に平滑なままであった。
前記実施例1に記載の手法に従って、銅合金材(商品名「CDA194」)の片面に粗面Niめっき層を異なる膜厚(0.3,0.5,0.7,1.0,1.2,1.5及び2.0μm)で電解めっきした。次いで、図25(B)に示すように、形成された粗面Niめっき層の上に膜厚0.05μmのパラジウム(Pd)めっき層と膜厚0.005μmの金(Au)めっき層を順次形成した。Auめっき層の表面は、Niめっき層の粗化面をそのまま再現していた。
カップせん断強さの測定:
まず、初期(ポストキュア直後)のサンプルI−1〜I−7を使用して、SEMI標準規格G69−0996に規定される手順に従ってカップせん断強さを測定し、平滑面Niめっき層に対する樹脂の密着性を評価した。図26は、それぞれのサンプルについて測定されたカップせん断強さをプロットしたグラフである。
2 導電性皮膜
3 銀めっき層
4 放熱板
5 半導体素子
8 ボンディングワイヤ
9 封止樹脂
10 半導体パッケージ
14 放熱板
15 配線基板
Claims (35)
- 絶縁性樹脂で封止される被覆面と、絶縁性樹脂による封止がなされない非被覆面とを備える半導体用のパッケージ部品において、
該パッケージ部品はリードフレームであり、
前記リードフレームの一方の表面が前記被覆面によって占有されており、かつそれに相対する他方の表面が前記非被覆面によって占有されており、
前記リードフレームが、所定の形状に加工された後の導体基材と、その表面を部分的もしくは全体的に被覆した導電性皮膜とからなり、かつ
前記導電性皮膜が、前記被覆面において、粗面化された表面プロファイルをもった粗面めっき層からなり、かつ前記非被覆面において、平滑な表面プロファイルをもった平滑面めっき層からなるとともに、前記被覆面の粗面めっき層と前記非被覆面の平滑面めっき層が、同一のめっき金属から形成されていることを特徴とするパッケージ部品。 - 前記粗面めっき層が、50nm以上の表面粗さ(Ra)を有していることを特徴とする請求項1に記載のパッケージ部品。
- 前記粗面めっき層が、71.7〜140.9nmの表面粗さ(Ra)を有していることを特徴とする請求項1又は2に記載のパッケージ部品。
- 前記平滑面めっき層が、17.6〜34.1nmの表面粗さ(Ra)を有していることを特徴とする請求項1〜3のいずれか1項に記載のパッケージ部品。
- 前記被覆面の粗面めっき層と前記非被覆面の平滑面めっき層が、同一もしくは異なる膜厚を有していることを特徴とする請求項1〜4のいずれか1項に記載のパッケージ部品。
- 前記めっき金属が、ニッケル、銅、パラジウム、金、銀、すず、クロム又はその合金からなることを特徴とする請求項1〜5のいずれか1項に記載のパッケージ部品。
- 前記導電性皮膜の粗面化された表面プロファイルが、めっき金属の針状結晶構造からなることを特徴とする請求項1〜6のいずれか1項に記載のパッケージ部品。
- 前記被覆面において、前記導電性皮膜が、2層もしくはそれ以上の多層構造からなることを特徴とする請求項1〜7のいずれか1項に記載のパッケージ部品。
- 前記導電性皮膜の多層構造が、下記の群:
(1)導体基材上に順に形成された、平滑面めっき層及び粗面めっき層、
(2)導体基材上に順に形成された、粗面めっき層及び表面めっき層、及び
(3)導体基材上に順に形成された、平滑面めっき層、粗面めっき層及び表面めっき層、
から選ばれる一員であることを特徴とする請求項8に記載のパッケージ部品。 - 前記表面めっき層が、下地の粗面めっき層の粗面化された表面プロファイルを複製していることを特徴とする請求項9に記載のパッケージ部品。
- 前記表面めっき層が、金、銀、銅、パラジウム、ニッケル、すず、クロム又はその合金からなる群から選ばれためっき金属から形成されていることを特徴とする請求項10に記載のパッケージ部品。
- 前記粗面めっき層が、めっき金属を酸化処理することにより粗面化させためっき層からなることを特徴とする請求項1〜11のいずれか1項に記載のパッケージ部品。
- 前記導体基材が、銅又は非銅系金属、それらの合金もしくは化合物からなることを特徴とする請求項1〜12のいずれか1項に記載のパッケージ部品。
- 前記非銅系金属が、アルミニウム又は鉄−ニッケルであることを特徴とする請求項13に記載のパッケージ部品。
- 絶縁性樹脂で封止されるかもしくは接着剤層が適用される被覆面と、絶縁性樹脂による封止及び接着剤の適用がなされない非被覆面とを備える半導体用のパッケージ部品において、
該パッケージ部品は放熱板であり、
前記放熱板の一方の表面が前記被覆面によって占有されており、かつそれに相対する他方の表面が前記非被覆面によって占有されており、
前記放熱板が、所定の形状に加工された後の導体基材と、その表面を部分的もしくは全体的に被覆した導電性皮膜とからなり、かつ
前記導電性皮膜が、前記被覆面において、粗面化された表面プロファイルをもった粗面めっき層からなり、かつ前記非被覆面において、平滑な表面プロファイルをもった平滑面めっき層からなるとともに、前記被覆面の粗面めっき層と前記非被覆面の平滑面めっき層が、同一のめっき金属から形成されていることを特徴とするパッケージ部品。 - 前記粗面めっき層が、50nm以上の表面粗さ(Ra)を有していることを特徴とする請求項15に記載のパッケージ部品。
- 前記粗面めっき層が、71.7〜140.9nmの表面粗さ(Ra)を有していることを特徴とする請求項15又は16に記載のパッケージ部品。
- 前記平滑面めっき層が、17.6〜34.1nmの表面粗さ(Ra)を有していることを特徴とする請求項15〜17のいずれか1項に記載のパッケージ部品。
- 前記被覆面の粗面めっき層と前記非被覆面の平滑面めっき層が、同一もしくは異なる膜厚を有していることを特徴とする請求項15〜18のいずれか1項に記載のパッケージ部品。
- 前記めっき金属が、ニッケル、銅、パラジウム、金、銀、すず、クロム又はその合金からなることを特徴とする請求項15〜19のいずれか1項に記載のパッケージ部品。
- 前記導電性皮膜の粗面化された表面プロファイルが、めっき金属の針状結晶構造からなることを特徴とする請求項15〜20のいずれか1項に記載のパッケージ部品。
- 前記被覆面において、前記導電性皮膜が、2層もしくはそれ以上の多層構造からなることを特徴とする請求項15〜21のいずれか1項に記載のパッケージ部品。
- 前記導電性皮膜の多層構造が、下記の群:
(1)導体基材上に順に形成された、平滑面めっき層及び粗面めっき層、
(2)導体基材上に順に形成された、粗面めっき層及び表面めっき層、及び
(3)導体基材上に順に形成された、平滑面めっき層、粗面めっき層及び表面めっき層、
から選ばれる一員であることを特徴とする請求項22に記載のパッケージ部品。 - 前記表面めっき層が、下地の粗面めっき層の粗面化された表面プロファイルを複製していることを特徴とする請求項23に記載のパッケージ部品。
- 前記表面めっき層が、金、銀、銅、パラジウム、ニッケル、すず、クロム又はその合金からなる群から選ばれためっき金属から形成されていることを特徴とする請求項24に記載のパッケージ部品。
- 前記粗面めっき層が、めっき金属を酸化処理することにより粗面化させためっき層からなることを特徴とする請求項15〜25のいずれか1項に記載のパッケージ部品。
- 前記導体基材が、銅又は非銅系金属、それらの合金もしくは化合物からなることを特徴とする請求項15〜26のいずれか1項に記載のパッケージ部品。
- 前記非銅系金属が、アルミニウム又は鉄−ニッケルであることを特徴とする請求項27に記載のパッケージ部品。
- 少なくとも1個の半導体素子を、請求項1〜28のいずれか1項に記載のパッケージ部品と組み合わせて備えてなることを特徴とする半導体パッケージ。
- 前記パッケージ部品がリードフレームであるとき、該リードフレームの所定の位置に前記半導体素子が搭載され、絶縁性樹脂で封止されていることを特徴とする請求項29に記載の半導体パッケージ。
- 前記リードフレームの前記被覆面の全部が前記絶縁性樹脂で封止されたパッケージであることを特徴とする請求項30に記載の半導体パッケージ。
- 一部の表面が外部に露出した外部露出型放熱板をさらに有していることを特徴とする請求項31に記載の半導体パッケージ。
- 前記リードフレームの一部が外部に露出したパッケージであることを特徴とする請求項30に記載の半導体パッケージ。
- 前記パッケージ部品が放熱板であるとき、その一部の表面が外部に露出していることを特徴とする請求項29に記載の半導体パッケージ。
- 前記半導体素子が配線基板上に搭載されており、該配線基板に接着剤層を介して前記放熱板が接合されていることを特徴とする請求項34に記載の半導体パッケージ。
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