TWI332243B - - Google Patents

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Publication number
TWI332243B
TWI332243B TW095112353A TW95112353A TWI332243B TW I332243 B TWI332243 B TW I332243B TW 095112353 A TW095112353 A TW 095112353A TW 95112353 A TW95112353 A TW 95112353A TW I332243 B TWI332243 B TW I332243B
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Taiwan
Prior art keywords
welding
wire
needle
bonding
soldering
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TW095112353A
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English (en)
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TW200703529A (en
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Shinkawa Kk
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Publication of TW200703529A publication Critical patent/TW200703529A/zh
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Publication of TWI332243B publication Critical patent/TWI332243B/zh

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    • H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
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    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Wire Bonding (AREA)
  • Wire Processing (AREA)

Description

1332243
九、發明說明： 【發明所屬之技術領域】 本發明係關於打線方法，特別是非常適合低弧形（lo〇p) 化之打線方法。 【先前技術】 將球體接合於第1銲點之球體接合方法，由於須壓潰 銲線直徑約3〜4倍之球體以進行接合，因需要較多面積， 無法因應微間距化之需求。此外，由於球體之頸部為再結 晶區域，既硬又脆，因此銲線之弧形，必須從再結晶區域 部分之上的部分彎曲。是以，無法滿足低弧形化之要求。 作為其改善方法，將銲線本身接合於第1銲點之無球 體接合方法，由於不形成球體，因此非常適合微間距化及 低弧形化。作為此種打線方法，例如有專利文獻“2。 [專利文獻1]日本特開平7— 147296號公報 [專利文獻2]日本特開2〇〇2— 64117號公報 專利文獻1，係在從銲針突出乂 出如線則端部附近設置銲 、’裏專曲用；f干部。在將銲線接合 曲用桿部，將銲線前端彎曲至銲移動鲜線彎 針之，則設有吸引保持機構，此機構係由圍繞銲 吸引孔構成^的複數個電磁鐵或配置成放射狀之複數個 W孔構成。此吸引保 負壓產生機m 揭稱J糟由切換機構切換電源或 座生機構之輸出來改變吸引方向。 專利文件1及2,須於習知打線 部或吸引保持機槿 、 鲊線考曲用桿 字機構。此外，僅是對銲線進行_次接合，因 5 Ϊ332243 此接合性亦是問題。 竹年々月/ 9修(¾正替換頁
又，專利文獻1，由於係將銲線前端部以銲線彎曲用桿 部強制的加以變曲’因此雖不會產生f曲失誤而具有可靠 性，但會因銲線彎曲用桿部之移動方向而決定銲線前端部 之彎曲方向。亦即，會決定被壓接於接合面之銲線的橫亙 M H可進行m之方向受到限制’欲進行不同方 之打線時，須進行工件之旋轉。
寻利文獻2’雖係將銲線前端部以電磁鐵或吸y孔構成 之吸弓I保持機構來加以_f曲於任意方向，但欲將銲針下端 大致垂直延伸之直徑约20〜50μη1之銲線以前述間接手段 來加以f曲’彎曲之可靠度低。χ，若係電磁鐵時辉線 之材質須為磁性材，一般使用之鋁、I、銅並無法直接使 【發明内容】 本發明之目的，在提供—種
不需對既有打線裝置進行 ’且此提昇接合性的打線 任何改造，即能謀求無球體接合 方法。 為解決前述問題之本發明 進行第1銲接後，於第/ 第1鲜點 與第2録毁”第2知點進订第2銲接，將第i銲點 .··之間以銲線加以連接，其特徵在於： 成為==銲接步驟中以銲線切斷步驟形成之尾部，形 為從#針則端部略微突出之長度； 該第1銲接步驟 成下部第1銲接部的 ’係由將該尾部接合於第1銲點以形 步驟；使銲針上升並移動至該下部第i 6
銲接部之上方，之後使銲針下降將銲線重疊連接於該 第1銲接部上以形成中間第i銲接部的步驟；以及， 銲針上升並移動至該中間第1銲接部之上方，之後使 下降將銲線重疊連接於❹間第i銲接部上以料上 銲接部的步驟所構成； 該第2銲接步驟，係由將焊線接合於第2鲜點以 :部第2銲接部的步驟；使銲針上升並移動至該下部第2 ^接^之上方，之後使銲針下降將料重疊連接於該下部 2銲接部上以形成上部第2銲接部的步驟所構成。 由於係將尾部形成為從銲針前端部略 因此不制特料裝置㈣進行無相接1 开1又纟於第1銲接步驟’係將尾部接合於第1銲點以 形成下部第！銲接部，於 知點以 線以形成中間第Η曰& Τ°Ρ弟1杯接部上重疊連接銲 接銲線以形成上M i 2再於中間第1輝接部上重疊連 合的接合性。弟#接部，因此能提昇第1鐸點之接 又由於第2銲接步驟，係 形成下部第2銲接部…， 篆接。於第2銲點以 接銲線以形成上呷第,、下部第2鋒接部上再度重疊連 昇接合之=第2銲接部，因此，於第2銲點亦能提 [實施方式】 以下’以圓I〜圖3說明本發明 態。如圖3⑷所示 ·線方法之-實施形 在由陶瓷基板、印刷基板或引腳框 7
1332243 等構成之電路基板，結合（固定）了形成有焊塾2之晶粒 又’於電路基板1形成有配線4。 首先，如圖1(a)所示，通過挾持器5插通於銲針6之銲 的尾部η，係處於從銲針6之下端略微突出，被彎曲 二銲針6之下面方向的狀態。又，挾持銲線1G之扶持器 5係呈閉合狀態。 於則述狀態下如圖1 (b)所示，# # 於作~針6下降將尾部接合 並為幻鋅點之配線4以形成下部第丨銲接部2G。此時， 並非如習知方式將銲線丨0以銲針 入，^么各 杆对6加以完全壓潰來進行接 、:係在銲…面不接觸配線4之上面、且不切斷銲 挟持内使鲜針6下降來形成下部^銲接部2〇。又， 狹持态5為閉狀態。 所干其^如圖1⑷所示，使銲針6上升，接著如圖UC0 广，使銲針6移動至下部第i銲接部 （） 如圖1⑷所示，使銲針6下降， 2， 21彎曲而將銲線部分21接合於下 ^斤不之I線部分 形成中間第！銲接部22。 接部2〇上’來 其次，如圖1(f)所示，使銲針6 所示，使銲斜6敌么上 上升’接著如圖1 (g；) 使鋅針6移動至中間第i銲接部22之 （g) 如圖1⑻所示，使銲針6下降 上方其次， 23彎曲而將锃始加v 圖1(g)所示之銲線部分 成下:第：Γ 合於下部第1銲接部心： 接部24,而構成第1銲接部25。 屯 :後:將銲線!。連接於作為第2 先，進订習知之倒轉（rev叫 知塾2上。百 亦即’如圖2(a)所示， 8 1332243 '^針6上升。此上升咼度，係略高於圖2(d)所示之晶 的 ij *3 、次，如圖2⑷所*，使銲針6進行往與作為第i 點之晶粒3的相反方向移動之所謂的倒轉動作。 其次’如圖2⑷所示，使銲針6上升。接著，如 不’住焊墊2之方向移動並送出銲 :合於…’來形成下部……。。此時並I 0 =方式將銲線⑽銲針6加以完全壓潰來進行接合= =針6下面不接觸焊塾2之上面、且： 範圍内使銲針6下降來形成下部第2鲜接部30。之 其次，如圖3(a)所示，使銲針6 所示，使銲針6移動至配線4側。其次升接者如圖叫 銲…降，將圖3(b)所示之録線部：3 =:示’使 分…於下部第2銲接部3。上來形成二而=線部 32，而構成第2銲接部33。 第2蚌接部 其次，使銲針6略微上升，接 圖3⑷所示，使挾持器5及銲針6 — /持益5閉合，如 此，輝線10被從第2辉接部 起住k方向移動。據 針6下端突出之尾部】】。 《根部切斷’且形成從銲 如前所述’由於係將尾部 微突出之長度，因此不使用特別的裝置：銲針6前端部略 合。又，由於第】銲接步错，係將尸\亦成進行無球體接 以形成下部第1銲接部2〇,於此下$ / 1接合於第]銲點 連接銲線〗0以形成中間第】銲接杳第1銲接部20上重疊 部K上重叠連接銲線】〇以形再於令間第1銲接 …鲜接部M，因此 9 1 1 今月，峨更)正替換頁/ 昇第1 ~點之接合的接合性。由 將銲線10接人於笛… 由於弟2龄接步驟，係 下部第W接；:上:：以形成τ部第 口Ρ 3 0上再度重疊連接銲 銲接部”’因此，2銲點亦能提昇接合=:。第2 亦能適用於第！銲點為焊塾2、第」"目反的’ 下，稱「正接合」）。此外，不僅是;為：線4之情形(以 Λ 第1鋅點為配線4或焊 塾 之情开>，無論是兩者之組合 U及依正接合—正接合 …合、或正接合一正接合-正接合順序進行接合皆 可。此情形下，能縮短鲜針6之移動時間、提昇生產性。 【圖式簡單說明】 扠幵生產r生 圖1 (a)〜（h) ’係顯示本發明之 的步驟I 之打線方法之-實施形態 圖2(a)〜（d) ’係圖1之後續步驟的圖。 圖3(a)〜（d)，係圖2之後續步驟的圖。 【主要元件代表符號】 1 電路基板 2 焊墊 3 晶粒 4 配線 5 挾持器 6 銲針 10 銲線 10 1332243 f)年今月/日修<更)正替換頁 11 尾部 20 下部第 1銲接部 22 中間第 1銲接部 24 上部第 1銲接部 25 第1銲接部 30 下部第 2銲接部 32 上部第 2銲接部 33 第2銲接部

Claims (1)

  1. 十:範Λ: J2鲆筏，將第1銲點與第 以連接，其特徵在於： ’，.-之間以銲線加 將该第2銲接步驟t以鲜線切斷步 成為從銲針前端部略微突出之長度； 毛邛，形 該第1銲接步驟，係由 成下部第1銲接部的步驟;使:針::接:於第1輝點以形 :::r，之後使銲針下降將^^:二1 録斜上以形成中間第1輝接部的步驟.以及J 、十上升並移動至該中間第丨銲接 /再使 下降將銲線重疊連接於該中間第’之後使銲針 銲接部的步驟所構成； 部上以形成上部第J 该第2銲接步驟 下部第2鮮接部的步驟^線接合於第2銲點以形成 銲接部之上方，之 、θ針上升並移動至該下部第2 第2鋒接部上以形成上部銲線重疊連接於該下部 ~接部的步驟所構成。 十一'圖式： 如次頁 12 1332243 _ 竹年~月/ ΰ修(史)正替換頁1 七、指定代表圖： . (一）本案指定代表圖為：第（1 )圖。 (二）本代表圖之元件符號簡單說明： 1 電路基板 4 配線 5 挾持器 6 銲針 10 銲線 . 11 尾部 20 下部第 1銲接部 22 中間第 1銲接部 24 上部第 1銲接部 25 第1銲接部 八、本案若有化學式時，請揭示最能顯示發明特徵的化學式： 4
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