JP2020524410A - 事前に濡れさせたコンタクト側壁表面を備える集積回路パッケージ - Google Patents
事前に濡れさせたコンタクト側壁表面を備える集積回路パッケージ Download PDFInfo
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- JP2020524410A JP2020524410A JP2019570362A JP2019570362A JP2020524410A JP 2020524410 A JP2020524410 A JP 2020524410A JP 2019570362 A JP2019570362 A JP 2019570362A JP 2019570362 A JP2019570362 A JP 2019570362A JP 2020524410 A JP2020524410 A JP 2020524410A
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- 229910000679 solder Inorganic materials 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000011241 protective layer Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- 239000010410 layer Substances 0.000 claims description 15
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 8
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 5
- 238000011179 visual inspection Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000000976 ink Substances 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 238000005538 encapsulation Methods 0.000 description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002105 nanoparticle Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 235000019253 formic acid Nutrition 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012536 packaging technology Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Abstract
Description
本明細書においてナノAgインクが事前錫めっき材料として記載されているが、錫ナノ粒子、金ナノ粒子などの他のタイプの導電性インクを用いてもよい。
Claims (15)
- 集積回路(IC)パッケージであって、
リードフレームに取り付けられる集積回路ダイを含む封止パッケージ、
露出されたコンタクト側壁表面と露出されたコンタクト下側表面とを各々が有する、コンタクトのセット、及び
各コンタクト側壁表面を覆う材料の保護層、
を含む、ICパッケージ。 - 請求項1に記載のICパッケージであって、材料の前記保護層が銀ナノ粒子を含む、ICパッケージ。
- 請求項1に記載のICパッケージであって、材料の前記保護層がはんだである、ICパッケージ。
- 請求項1に記載のICパッケージであって、前記リードフレームが銅である、ICパッケージ。
- 請求項1に記載のICパッケージであって、各露出されたコンタクト下側表面が錫めっきで覆われている、ICパッケージ。
- 方法であって、
個々のリードフレームを有するリードフレームストリップを封止することであって、前記リードフレームストリップが、前記個々のリードフレームに取り付けられるICダイを含み、少なくとも2つの隣接する個々のリードフレームがコンタクト要素を共有する、前記封止すること、
コンタクト側壁表面を形成するために、前記コンタクト要素に隣接する前記封止されたリードフレームストリップにトレンチを部分的にソーイングすること、
前記トレンチに事前錫めっき材料を堆積すること、
前記コンタクト側壁表面を前記事前錫めっき材料で覆うため、前記事前錫めっき材料をリフローすること、
前記封止されたリードフレームストリップを、コンタクト側壁表面を各々有する個々のICパッケージに分離すること、
を含み、
前記事前錫めっき材料が前記コンタクト側壁表面上に保護層を形成する、
方法。 - 請求項6に記載の方法であって、事前錫めっき材料の層が銀ナノ粒子を含む、方法。
- 請求項6に記載の方法であって、事前錫めっき材料の層がはんだである、方法。
- 請求項6に記載の方法であって、前記事前錫めっき材料が、インクジェットプリンタを用いて堆積される、方法。
- 請求項6に記載の方法であって、前記封止されたフレームストリップを個々のICパッケージに分離することが、前記トレンチより薄い切り口(kerf)を生成する、方法。
- 請求項6に記載の方法であって、前記封止されたリードフレームストリップを個々のICパッケージに分離する前に、前記トレンチを背面充填することを更に含む、方法。
- 自動外観検査(AVI:automatic visual inspection)を実施するための方法であって、
基板上のパッドに集積回路(IC)パッケージをはんだ付けすることであって、前記ICパッケージがコンタクトを有し、前記コンタクトの各々が下側表面と側壁表面とを有する、前記はんだ付けすること、
前記ICパッケージ上のコンタクトと前記基板上のパッドとの間のはんだ接合のはんだプロファイルを視覚的に検査すること、及び
前記はんだプロファイルが、前記コンタクトの前記側壁表面の実質的な部分を覆うフィレットを含まないとき、前記はんだ接合を不合格とすること、
を含む、方法。 - 請求項12に記載の方法であって、前記はんだプロファイルが、前記コンタクトの前記側壁表面の実質的な部分を覆うフィレットを含むとき、前記はんだ接合を合格とすることを更に含む、方法。
- 請求項12に記載の方法であって、前記コンタクトの各々の前記側壁表面の実質的な部分が、材料の保護層で覆われている、方法。
- 請求項14に記載の方法であって、材料の前記保護層が銀ナノ粒子を含む、方法。
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