TW399275B - A system of solder ball placement and fluxless laser reflow of ball grid array packaging of an IC chip with a substrate having an array of pads, and an apparatus for solder ball placement of ball grid array packaging of an IC chip with a substrate having - Google Patents
A system of solder ball placement and fluxless laser reflow of ball grid array packaging of an IC chip with a substrate having an array of pads, and an apparatus for solder ball placement of ball grid array packaging of an IC chip with a substrate having Download PDFInfo
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- TW399275B TW399275B TW087106696A TW87106696A TW399275B TW 399275 B TW399275 B TW 399275B TW 087106696 A TW087106696 A TW 087106696A TW 87106696 A TW87106696 A TW 87106696A TW 399275 B TW399275 B TW 399275B
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- laser
- bead
- substrate
- array
- pad
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- 239000000758 substrate Substances 0.000 title claims abstract description 30
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 13
- 229910000679 solder Inorganic materials 0.000 title abstract description 20
- 230000004907 flux Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000011324 bead Substances 0.000 claims description 105
- 238000003466 welding Methods 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 238000011179 visual inspection Methods 0.000 claims description 4
- 230000002079 cooperative effect Effects 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000012299 nitrogen atmosphere Substances 0.000 claims 1
- 229910052704 radon Inorganic materials 0.000 claims 1
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 claims 1
- 238000007670 refining Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010931 gold Substances 0.000 abstract description 3
- 229910052737 gold Inorganic materials 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical class [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 235000015170 shellfish Nutrition 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910052778 Plutonium Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67144—Apparatus for mounting on conductive members, e.g. leadframes or conductors on insulating substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- 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
- H01L21/48—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
- H01L21/4814—Conductive parts
- H01L21/4846—Leads on or in insulating or insulated substrates, e.g. metallisation
- H01L21/4853—Connection or disconnection of other leads to or from a metallisation, e.g. pins, wires, bumps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3457—Solder materials or compositions; Methods of application thereof
- H05K3/3478—Applying solder preforms; Transferring prefabricated solder patterns
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/04—Soldering or other types of metallurgic bonding
- H05K2203/041—Solder preforms in the shape of solder balls
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/04—Soldering or other types of metallurgic bonding
- H05K2203/043—Reflowing of solder coated conductors, not during connection of components, e.g. reflowing solder paste
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/05—Patterning and lithography; Masks; Details of resist
- H05K2203/0548—Masks
- H05K2203/0557—Non-printed masks
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/10—Using electric, magnetic and electromagnetic fields; Using laser light
- H05K2203/107—Using laser light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3494—Heating methods for reflowing of solder
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Description
經濟部中央標準局負工消費合作社印製 Λ7 B7 五、發明説明(1 ) 發明領域 本發明係關於焊接用於1C裝置與印刷電路板間之電連 接之用途。特別本發明係關於使用雷射技術供再熔化球柵 陣列(BGA)裝置上之焊珠。 發明背景 積體電路(1C)裝置之球柵陣列(BGA)封裝於1C裝置生 產上之重要性曰增。BGA封裝時,1C晶片常安裝於附有 墊之銅基材上,其上方施加助熔劑接著安置焊珠。然後焊 珠於再熔烘箱内焊接於墊。助熔劑含有活化劑其有助於焊 珠於銅墊上的焊接或再熔過程。由於銅於空氣之氧存在下 不穩定,銅墊表面常出現銅氧化物,除非存在有助熔劑去 除銅氧化物且於再熔過程與焊珠反應否則無法妥為焊接。 習知珠安置方法係使用真空吸取頭,該頭有適當吸取 孔陣列而可拾取焊珠。拾取於適當陣列之珠置於頭上隨後 下降至附有預先施用助熔劑之基材上。然後BGA總成可 輸送至再熔烘箱供焊接焊珠。
目前1C晶片生產之傾向係每個晶片之1C密度增加。1C 密度越高於相同晶片大小上所需互連點的數目增加。因此
需要BGA封裝體具有較高密度墊及焊珠。此種高密度BGA 封裝體中,每一晶片之互連墊數高達1〇〇〇至2000,比較低 密度BGA封裝體於相同表面積每個晶片之墊數低於400。 對每晶片高於400墊之高密度封裝體而言,節距(兩個焊珠 間距)及焊珠大小必須相對縮小。例如低密度BGA構造, 每個晶片少於400墊,墊直徑25密耳及節距50密耳可使用30 本紙張尺度適用中國國家標準(CNS ) A4規格(210 X 297公釐) —I—-» - - - - - - - - - 1» - - - ' y n - - - - - - Tw 0¾-° ' / (請先閲讀背面之注意事項再填寫本頁) 4 經濟部中央標準局負工消费合作社印製 Λ7 Β7 i、發明説明(2 ) 密耳直徑之焊珠。於高密度BGA構造之例例如墊直徑10 密耳及節距20密耳,則需使用直徑12密耳之焊珠。 此種節距及焊珠大小縮小造成焊接過程問題。第一個 問題係安置問題》由於焊珠極小且重量極輕,即使些微的 空氣擾動或基材略為翹曲皆可能導致珠位置放置錯誤。由 於尚密度陣列需要細微節距,即使些微異位也可能導致架橋, 架橋為於再溶烘箱中焊接過程兩顆焊珠混合而形成連接。一旦架 橋,整個封裝體必須剔除。結果習知使用真空吸取頭之珠 安置方法因架橋而造成高剔除率β第二個問題係封裝體由 珠放置位置移轉至再熔烘箱。即使焊珠放置位置正確,移 轉封裝體至再熔烘箱所需移動也可能導致珠異位。除前述 問題外,包括焊珠安置於再熔烘箱内再熔,及以去離子水 徹底洗滌而去除任何殘餘助熔劑殘渣(水溶性助熔劑)需要 龐大且昂責的設備。因此需要設計新穎珠安置構想其可避 免焊珠的錯置及架橋同時減少程序中牽涉之設備量而改良 封裝過程® 發明目的 本發明之目的係提供於BGA裝置封裝時準確安置焊 珠方法。 本發明之另一目的係減少於BGA總成生產線上於再 熔過程發生焊珠架橋。 又一目的係於焊接焊珠於BGA裝置時免除再熔烘箱 之需要。 又另—目的係免除BGA裝置組裝過程之助熔劑施用 本纸張尺度適用中國國家榡隼(CNS ) Α4規格(210X297公釐) (請先閱讀背面之注意事項再填寫本頁) ,1Τ -泉. 經濟部中央棣準局貝工消資合作社印製 Λ7 --------__ A、發明説明(3 ) 於去除步驟。 發明概述 本發明為一種焊珠安置及無助熔劑雷射再熔用於 BGA封裝之系統包含模版對正裝置,焊珠安置裝置及雷 射頭。模版對正位於不含助熔劑之基材表面上之連接墊》 對正的模版可正確的導引藉珠安置裝置安置珠於墊上。一 顆焊珠落至模版之各個孔上恰位於不含助溶劑之塾上方。 定位於塾上之焊珠隨後藉雷射頭暴露於雷射,結果導致正 位於基材墊上之焊珠快速熔化。然後使熔化的焊珠快速冷 卻。此種附有模版之無助熔劑雷射再熔方法可改良珠放置 之正確性且免除珠架橋問題,同時免除使用再炫烘箱及清 潔室,此等裝置皆為BGA裝置封裝時相關的龐大而昂貴 的設備。實施本發明需要以由適合無助溶劑及焊接之材料 製成之墊封裝。此等適當材料為貴金屬且不易於空氣中氧 化。以金墊為佳。 圖式之簡單說明 第1圖為根據本發明之珠安置之示意圖。 第2圊為根據本發明之雷射再熔系統之示意圖。 第3圊為示意圖顯示雷射再熔焊珠用之矩陣雷射頭之 定位。 第4圖為流程圖示例說明根據本發明之雷射再熔過程 設計之各步驟。 發明說明 --------}裝------1Τ------Λ (請先聞讀背面之注意事項再填寫本頁}
-6 - 經濟部中央梂準局貝工消費合作社印製 Λ7 Β7 五、發明説明(4 ) 本發明利用兩種個別技術之組合而於高密度Bga裝 置之封裝達成協同優異效果,同時許可免除習知BGA封 裝方法之三大步驟。第一種技術牵涉使用模版而導引由習 知珠吸取頭釋放及定位珠《一旦珠妥為定位於基材上及模 版内部,使用第二雷射再熔技術,其許可焊珠熔化及有效 焊接。使用此二技術組合使用適當墊,可免除助熔劑施用 於助熔劑去除步驟。焊珠可未使用助熔劑直接焊接於墊上 。此外,也可免除烘箱再熔步驟。結果可大體縮短完成封 裝過程所需時間及龐大設備。 第1圖顯示根據本發明之珠安置方法之示意圖。高密 度陣列模版22恰置於基材上而未事先施用助溶劑。附有焊 珠定位之珠吸取頭24使用模版做導引對正基材之墊。當珠 吸取頭之陣列對正模版陣列時,珠吸取頭的真空解除,及 烊珠排放至基材上》珠吸取頭可為習用於BGA封裝者, 而陣列適合高密度裝置,模版可為具有所需密度之篩目大 小之線網。模版可由任一種耐熱材料製成如不鏽鋼及鋁β 較佳材料為不鏽鋼。線網之線需夠厚以防止焊珠滾過線上 。例如對直徑12密耳之焊珠而言,線網之線厚度如第3囷 之參考編號26指示約為12密耳以防止珠滾出模穴27之外。 此外,模穴内部面積較佳略大於焊珠之刳面積俾易由珠吸 取頭安置,及防止珠黏著於線網。較佳面積比焊珠之剖面 積大15-35% ^供本發明之用,墊需由適當貴金屬或合金 製成因此焊珠可無需添加助熔劑直接焊於墊上。較佳金屬 為金。 本紙張尺度適用中國國家標準(CNS ) Α4規格(21〇Χ:297公釐) (請先閲讀背面之注意事項再填寫本頁) ,裝- 、1Τ 經濟部中央標準局貝工消費合作社印裝 A7 B7 五、發明説明(5 ) 第2圖示例說明矩陣雷射頭如何用來再熔焊珠。珠吸 取頭於安置珠後由基材上移開,雷射頭30置於模版及焊珠 上及於雷射束作用下快速熔化形成金屬間熔合。一旦關閉 雷射束,熔化的焊珠以高冷卻速率快速冷卻。雷射頭較佳 為迴轉儀頭或矩陣形頭包含一串光纖以球陣列之相同陣列 排列。雷射如鈥:釔-鋁-石榴石(Nd : YAG)雷射適合雷射 再熔。雷射再熔可於一般周圍條件下進行或可於氮氣環境 下進行。暴露時間及強度隨不同焊珠而異且可以例行實驗 決定。 第3圖顯示雷射頭之光纖對正助熔劑層32上方位於模 版29之腔室27内部安置之焊珠28。光纖罩於殼體34内,殼 體固定光纖36陣列而匹配墊及焊珠陣列。模版線網之高度 26約略等於焊珠直徑。 第4圖為流程圖顯示根據本發明之方法,模版對正基 材接著以珠吸取頭42安置珠。於步驟42後,較佳進行目測 檢視44俾確保珠妥為定位接著為雷射再熔46。步驟42-46 較佳以封裝體固定進行俾減少於焊珠置於基材上之任何干 擾。雷射焊接後封裝體可於再熔烘箱或熱板48加熱短時間 而平滑及拋光焊珠表面。目測檢視技術較佳使用攝影機如 CCD(電容器帶電裝置)攝影機進行。 雖然已經就第1至4圖說明本發明,但需瞭解附圖僅供 舉例說明之用而絕非限制本發明。業界人士可未悖離所述 本發明之精髓及範圍做出多種變化及修改。 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) ^^1 n^i n^i ^^^1 ·\ i^n K .-3^--9 (請先閲讀背面之注意事項再填寫本頁) Λ7 B7 五、發明説明(6 ) 元件標號對照 20…基材 29…模版 22…模版 30…雷射頭 24…吸取頭 32…助溶劑 26…厚度 34…殼體 27…模穴 36…光纖 28…烊珠 42-46…步驟 t . -- I - I - m - - u ί / - - κι - I— I ^^^1 — . ^1» 、τ (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局貝工消費合作社印製 本紙張尺度適用中國國家標準(CNS ) Α4規格(210Χ297公釐)
Claims (1)
- 时年W//E1知正 補充 六、申請專利範圍 第87106696號專利申請案申請專利範圍修正本 修正日期:S8年12月 1 · 一種附有具有墊陣列之基材之1C晶片球栅陣列封裝用 之焊珠安置及無助熔劑式雷射再熔系統,其包含: 模版對正裝置具有模穴陣列可匹配塾陣列之模版 焊珠安置裝置,及 雷射模組’附有雷射頭適合發射至少一股雷射束 至焊珠上, 該系統循序執行下列步驟: 對正模版之模穴含有墊陣列; 使用模版作為導引對正焊珠安置裝置與基材故焊 珠陣列對正墊陣列; 排放對正的焊珠於附有預先施用之助熔劑之墊上 ’故焊珠置於各模版之模穴内; 雷射頭對正基材;及 辦放雷射束至焊珠上故焊珠被熔化且無助熔劑式 焊接於墊上。 2.如申請專利範圍第1項之附有具有墊陣列之基材之…晶 片球柵陣列封裝用之焊珠安置及無助熔劑式雷射再熔 系統,其中該系統又包括一部攝影機,及於焊珠安置 後使用攝影機來執行目測檢視之額外步驟。 3_如申請專利範圍第丨項之附有具有墊陣列之基材之圯晶 片球柵陣列封裝用之焊珠安置及無助溶劑式雷射再炫 (請先閱讀背面之注意事項再填寫本頁) i · I I I I---^ l· I — I 峻 本紙張疋度適射關家標準(CNS)A4規格7 210 X 297 公釐) 时年W//E1知正 補充 六、申請專利範圍 第87106696號專利申請案申請專利範圍修正本 修正日期:S8年12月 1 · 一種附有具有墊陣列之基材之1C晶片球栅陣列封裝用 之焊珠安置及無助熔劑式雷射再熔系統,其包含: 模版對正裝置具有模穴陣列可匹配塾陣列之模版 焊珠安置裝置,及 雷射模組’附有雷射頭適合發射至少一股雷射束 至焊珠上, 該系統循序執行下列步驟: 對正模版之模穴含有墊陣列; 使用模版作為導引對正焊珠安置裝置與基材故焊 珠陣列對正墊陣列; 排放對正的焊珠於附有預先施用之助熔劑之墊上 ’故焊珠置於各模版之模穴内; 雷射頭對正基材;及 辦放雷射束至焊珠上故焊珠被熔化且無助熔劑式 焊接於墊上。 2.如申請專利範圍第1項之附有具有墊陣列之基材之…晶 片球柵陣列封裝用之焊珠安置及無助熔劑式雷射再熔 系統,其中該系統又包括一部攝影機,及於焊珠安置 後使用攝影機來執行目測檢視之額外步驟。 3_如申請專利範圍第丨項之附有具有墊陣列之基材之圯晶 片球柵陣列封裝用之焊珠安置及無助溶劑式雷射再炫 (請先閱讀背面之注意事項再填寫本頁) i · I I I I---^ l· I — I 峻 本紙張疋度適射關家標準(CNS)A4規格7 210 X 297 公釐) 六、申請專利範圍 系統,其中該雷射頭為矩陣雷射頭。 4. 如申請專利範圍第i項之附有具有墊陣列之基材之IC晶 片球栅陣列封裝用之焊珠安置及無助熔劑式雷射再熔 系統’其中該雷射頭可傳送Nd: YAG雷射束。 5. 如申請專利範圍第!項之附有具有墊陣列之基材之IC晶 片球柵陣列封裝用之焊珠安置及無助熔劑式雷射再熔 系統’其中該雷射焊接步驟係於氮氣環境下進行。 6. 如申凊專利範圍第丨至5項中任一項之附有具有墊陣列 之基材之1C晶片球栅陣列封裝用之烊珠安置及無助熔 劑式雷射再熔系統,其中該系統又包含一片熱板及 於雷射焊接步驟後以熱板執行焊珠之加熱拋光之額外 步驟。 7·如申請專利範圍第!至5項中任一項之附有具有墊陣列 之基材之1C晶片球栅陣列封裝用之焊珠安置及無助炫 劑式雷射再炫系統,其中該系統又包含一座再炼供箱 ,及於雷射焊接步驟後使用再㈣箱執行焊珠之加熱 拋光'之額外步驟。 8. 如申請㈣㈣第1至5射任—項之时具有塾陣歹 晶片球栅陣列封裝用之焊珠安置及無㈣ 劑式雷射再稼系統,其中該塾為金製成。 9. 一㈣晶狀球柵陣列封裝用之焊珠安置 晶片附有具有互連料列之⑽,„置包含· 模版對正裝署H 士 塾陣列; 其具有-片模版附有模穴陣列匹配 本紙張尺度適用中國國家標準規格(2J0" -2- χ 297公釐 ) A8 _ B8 3992 冗 Eg 六、申請專利範圍 焊珠安置於不含助熔劑墊上之裝置;及 一個雷射頭其適合發射雷射束至焊珠故焊珠被熔 化 ------------ i - -----^'.1-------- (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐)
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SG1997003591A SG67423A1 (en) | 1997-09-26 | 1997-09-26 | Fluxless laser reflow with template for solder balls of bga packaging |
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TW087106696A TW399275B (en) | 1997-09-26 | 1998-04-30 | A system of solder ball placement and fluxless laser reflow of ball grid array packaging of an IC chip with a substrate having an array of pads, and an apparatus for solder ball placement of ball grid array packaging of an IC chip with a substrate having |
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US7003874B1 (en) * | 1998-09-03 | 2006-02-28 | Micron Technology, Inc. | Methods of bonding solder balls to bond pads on a substrate |
CN113634890A (zh) * | 2020-05-11 | 2021-11-12 | 三赢科技(深圳)有限公司 | 激光焊接系统及激光焊接方法 |
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1998
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