TW419799B - Leadless array package - Google Patents

Leadless array package Download PDF

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Publication number
TW419799B
TW419799B TW088104633A TW88104633A TW419799B TW 419799 B TW419799 B TW 419799B TW 088104633 A TW088104633 A TW 088104633A TW 88104633 A TW88104633 A TW 88104633A TW 419799 B TW419799 B TW 419799B
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integrated circuit
bottom layer
crystal
package
cube
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TW088104633A
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Julius A Kovats
Paul I Suciu
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Atmel Corp
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture 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
    • H01L21/48Manufacture 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
    • H01L21/4814Conductive parts
    • H01L21/4846Leads on or in insulating or insulated substrates, e.g. metallisation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/48Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/488Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
    • H01L23/498Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
    • H01L23/49805Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers the leads being also applied on the sidewalls or the bottom of the substrate, e.g. leadless packages for surface mounting
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/93Batch processes
    • H01L24/95Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
    • H01L24/97Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01013Aluminum [Al]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01033Arsenic [As]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01082Lead [Pb]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/102Material of the semiconductor or solid state bodies
    • H01L2924/1025Semiconducting materials
    • H01L2924/10251Elemental semiconductors, i.e. Group IV
    • H01L2924/10253Silicon [Si]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/12Passive devices, e.g. 2 terminal devices
    • H01L2924/1204Optical Diode
    • H01L2924/12042LASER
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/14Integrated circuits
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341Surface mounted components
    • H05K3/3431Leadless components
    • H05K3/3442Leadless components having edge contacts, e.g. leadless chip capacitors, chip carriers

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
  • Testing Of Individual Semiconductor Devices (AREA)

Description

41979 D
發明領域 本發明係關於積體電路封裝件之領域。 背景技術 在積體電路的裝配中’製造具有較大密度及較小封事 寸之電子組件是一項持續的挑戰。將印刷電路板上的^尺 空間作盡可此最有效率的運用是極為重要的β積體電路封 裝的趨勢’是擺脫傳統的雙排(dual-in-1 ine )及穿孔式 封裝’而朝向表面式安裝(surface-mount)封裝件,諸 列Gba丄L gj ii aj:X4J )及晶方承載器封裝件(cj3u ’ )。表面式安裝是一種將一封裝1(:物理 地裝設至印刷電路板(PCB)表面的過程,而不是將引線 插入穿過PCB鍍上金屬的孔。封裝件的設計細節,諸如外 形、插腳排列方式及尺寸,通常由同業公會,例如JEDEC 來訂定。 大部分表面式安裝的元件都使用引線以將晶f封裝件安 裝至PCB表面。小型1C封裝件(S〇ic, small outline 1C )及四邊形扁平封裝件(QFP,QUad flat pack)經常使 用從該元件伸展開的「鷗翼型(gu丨丨w i ng )」引線。鷗 翼型的主要優點是,焊接頭可易於檢查。其缺點則是,暴 露出來的引線常會在系統板上回焊(ref l〇w )之前的處裡 中彎曲及斷裂。其另一缺點是,因為引線展開,所以在 PCB上引線會佔用額外的空間。 另一種使用的引線形式為「】引線」,其引線被捲摺在
)41979 9 五、發明說明(2) 裝置下,形狀如同英文字母「J」。「J引線」通常被使用 於塑膠引線式晶方承載器(PLCC,plastic-leaded chip carrier ) 。 「J引線」的優點是,其佔用電路板較少的空 間’且引線被保護於裝置的下方。然而,這也使此種裝置 較不易於測試、檢查或維修,且不允許薄斷面安裝(1 〇w profile mounting) ° 無引線式積體電路封裝件為先前技術中習知者。MUes 等人之美國專利第5,5 3 5,1 0 1號揭示—種^ ?厂線一恐 ,其使用球形格狀陣列供安裝至印席/電路 形格狀陣列係利用位於,產鈹之焊球而安裝至印 路板。此種安排具有一些優點,例如,因為沒有 裝件邊緣突出’所以封裝件尺寸較小。然格: 歹“似)存在著某些缺點。首先,焊接頭係隱藏於封/ 件底侧’而使得視查及原地探針測試f τ π ^ • 、— ^ ^ in-situ probe teS』ing)貫際上不可能達成。再者,因為BGA具有可保捭 晶,且扇出引線的電路板’故BGA系統的 二^ 從面積的觀點來看,BGA佔用較少的* 金〜^然 使。這將使整體系統:;用二巍篇會 發明概述 ' a 但具有可供@及^ 件利用封裝件邊緣上 可延伸至 。無引線式封裴件 本發明係為一種積體電路封裝件 刷電路板(PCB ),其不具有插腳, 笔>蹢畚。本發明之無引線式封裝 觸點以安裝至印刷電路板,該觸點 (solder reflow pad)
Λ19799 五 發明說明(3) ___ 有類似於禅運_矣& 因為安裝安裝封裝件的印跡—A"。 可周/ 有引線,原本引線結構所使用的空間二 Γ周於容納矽元件晶方。 二間,現在 =:式陣列封裳件具有一 r5|,該基 印刷電路板之製作材料相同,所以在表面= :.、、、不相配(thermal mismatch )問題便可顯^ 、 二;=因為電觸點係位於無引線式封裝件減封 更ί易I;及測試可較球形格狀陣列型安裝系統之封裝件 要說明 圖1為一無引線式封裝件之斜視圖。 =2為無引線式封裝件在製造階段配置之 本發明之第1體例。 ㈤例不 圖3為另一無引線式封裝件在製造階段配置之俯 例示本發明之第二具體例。 圖4為無引線式陣列封裝件之斜視圖,例示 在最終使用者的印刷電路板上。 装封裝件 最佳實施楛式 參照圖1,無引線式陣列封裝件1 〇係以一種「三明治」 方式組裝。一底層21,由基底材料所製成,包含無引線式 陣列封裝件之底部。一積體電路晶方丨5接合於底層2丨之上 方’而一包覆材料11覆蓋於積體電路晶方15及底層21之上 方。然後’完整之無引線式陣列封裝件1 〇便可準備安裝至
D:\2D-CODE\88-05\88104633. ptd
第7頁 419799 五 '發明說明(4) 最終使用者的印刷電路板上。 參照圖2,.底層2丨)係由、言板材崎所兔畫、例如環氧玻璃 或其他一般用於印刷電路板製造的合適料。使用此種基 板材料製作底層21的理由是,藉由使用相同或相似於最終 使用者之印刷電路板製造材料的基板材料,可顯著地減小 熱不相配(therma 1 mi smat ch )的可能性。藉由減小熱不 相配的可能性,可減小因熱膨脹係數差異所引起的機械應 力,因而減小晶方封裝件中焊接及接線失敗的可能性。在 氯龙後,'底_層.0將被分I成激瓜分,亂秦4遠暴篇 16,每一底層區域為一個晶方。每一個別底層區域16的長 度14及寬度1 2係等於小型積體電路(SOIC )晶方封裝件印 跡(footprint)的標準尺寸。底層21的基板材料通常很 薄,名目厚度約0.38〜0.64毫米。在本發明之一具體例 中’底層係由一 35毫米環氧玻璃(epoxy-glass )捲帶所 製成’其係被捆在滾輪上ϋ膦椿。此種使 用環氧玻璃捲帶的形式,使得製造過程可相容於許多自動 處裡、測試及佈局系統,且亦便利於平行測試。 本發明也可使用其他種類的IC印跡,例如TS0P,但其 必須使用於具有小引線數目(3 2插腳或更少)的積體電路 晶方。這是因曰^^弓L屢位-於1C是友一的.一,以 可入。引線數目被IC晶方周邊的尺寸 所限制。甚至i FV的k度,引線間必須存在有間隔以防 止短路發生。為獲得額外的空間,晶方的四邊均可供引線 使用,引線的設置係可使使用者能進行引線的PCB佈線。
419799 五、發明說明(5) 如果IC晶方太大’晶方的石夕晶粒與底層基板間的熱不相配 太大,而晶方封裝件非常可能會破裂。因此每一底層區域 必須選定適當尺寸的晶方。 繼續參照圖2,在底層21的上方配置了一連串的金屬合 接塾(Ϊ 9 ’積體電路晶方15可安裝於其上。金屬合接墊IQ係 對應於積體電路晶方15的尺寸而設的。金屬墊19可設計成 適用於兩邊或四邊上具有觸點的1C晶方。在圖2中,顯示 觸點位於I C晶方的兩邊。積體電路晶方1 5通常小於個別底 層區域16 ’但其尺寸亦可與底層區域16相同(因此,尺寸 與一標準SOIC封裝件相同)。在圖2中,積體電路晶方15 係小於底層區域16。每一底層區域16中將會安裝一積體電 路晶方15。在整個底層21上可佈局一大型積體電路晶方陣 列(例如1 Ο Ο X 1 5 0晶方)。同時生產大數量的晶方封裝件 是有利的,因為可節省時間及成本,且能夠同時製造及測 試一大數量的晶方封裝件。當IC晶方15被佈局在底層2 1 上,晶粒被附接至板的上側’且考線4 位於金屬晶方% 與每一個別底層區域16邊緣上的我1觸雜义間。當使用工 業標準尺寸之晶方時’如圖2所示,晶方1 5的邊緣與底層 21的邊緣之間通常有約1 . 4 mm的空間,以允許標準接線及 晶粒附接。 圖3係例示當I C晶方1 5的尺寸與底層區域的尺寸相同的 情況(如圖2所界定該區域具有標準SOIC封裝件的長14及 寬12 )。在此種情況’金屬晶方9與板觸點23之間的距 離為最小,且不是使用接線技術,而是使用倒裝法(f 1 i p
D:\2D-CODE\88-05\88104633. ptd 第9頁
I 419799 五、發明說明(6) ch i ρ ) /凸塊(bump )技術以· I έ昂方附接至瘡、違域 16 〇 ' 再參照圖2,在接線及晶粒附接之後,一包覆材料丨i , 較佳為環氣樹脂覆蓋(epoxy overcoat)或塑穆模製 (Plastic molding) ’被塗敷到整個積體電路晶方15陣 列及底層21。通常,該包覆材料厚度應超過2 mffl。然後, 方附接且被包覆材料n覆蓋的整轉瓣 一 氮β此部分分割將使每一個別晶方封 裝件與其他的晶方封裝件成電性隔離,因 個上所述,個別晶方陣列封裝件的=二皮 S0IC Β曰方封裝件的標準尺寸相同。以 將會符合標準尺寸S0IC印跡。 '早夕i封裝件 在如上述部分分割成個別晶方 測試。典型地,這些測試 :封裝件被 圖確認是否有任何會導致二業生產測試’其意 守软積體電路故障的居都遛彳土庇t 這些測試可藉由習知的測…"::㈣局八k瑕疵。 , 、』式儀器來進行,例如掇测+ 者。大部分的習知測試="如及類似 (其連接至合接墊)心ί都具有小到能夠接觸板觸點2 3 也存在著可能性。在〶 。、平行地測試數個晶方封裝件 後,^害jAiJ f :且認為其符合測試要求之 的最終分割通常為么*牛。此種在測試之後 有介於晶方封裝件之間的带以70全念牛(所 了)。 、電性連接都已在測試之前被分開
第10頁 五、發明說明(7) " ' ---- 參照圖4 ’完成的I c陣列封裝件丨0,可被安裝於最終 用者的印刷電路板59。I C陣列封裝件1 〇被置於印刷電、路 59上焊接鮮的庄方.。焊接鐵5龙對應於板觸滅、_,其係暴 。藉1¾ :然後 印刷電路板5 9及i C陣列封裝件在一熱對流爐中加熱。焊膏 流動’ 塾5 7身板觸點2 3之間有媒^ ( s0 1 r f 1 )€。在從爐中取出之後,當焊流冷1時,無引線式陣列 封裝件10與最終使用者的印刷電路板之間便存在一電性 及機械連接。

Claims (1)

  1. 419799 六、申請專利範圍 !.一種無引線式〇^1^封裝每,包含:— 一積體電路晶方’其周圍上具有複數個n·^; 一底層,其具有一長度及一寬度’及具有包含一上側的 兩相對主側,上侧具有數個^^签配置在底層的周圍、且 對應於積體電路晶方上的運-接i ’該積體電路晶方被接合 至底層的上侧; —包覆材料,其覆蓋於積體電路晶方、且本質上覆蓋整 個底層的上側;及 一連串的板觸點,連接至合接墊’且未被包覆材料所覆 蓋,因此板觸點係暴露以供焊流(S ο 1 d e r f 1 〇 W )連接至 使用者的電路板° 2. 如申請專利範圍第1項之無引線式羞件;, 其中底層係由環氧玻璃(epoxy-glass)所組成》 3, 如申請專利範圍第1項之無引線式, 其中積體電路晶方具有一長度及寬度,其小於或等於底層 之長度及寬度。 4 ·如申請專利範圍第1項之無引線式積艘電路封裝件, 其中底層之長度及寬度對應於標準小型積體電路(S〇ic, small outline 1C)印跡(footprint)之標準長度及寬 度。 5. —種無引線式積體電路封裝件,包含: 一底層,其由絕緣基板製成,且具有包含一上側的兩相 對主側,上側具有複數個合接墊配置在底層的周圍,該底 層之尺寸對應於標準積體電路印跡;
    4^799
    六、申請專利範圍 一積體電路晶方,其具有複數個連接墊在其周圍上,哕 積體電路晶方具有一矽晶粒,其尺寸等於或小於底層之= 寸’該積體電路晶方係被附接至底層的上側;一 〇覆材料,覆蓋該積體電路晶方、且本質上覆蓋整個 底層的上側;及 一連串的板觸點,連接至底層之周圍上的合接墊,且未 被包覆材料所覆蓋,因此板觸點係暴露以供 n〇tf)連接至使用者之電路板。 6. 如申請專利範圍第5項之無引線式積體電路封裝件, 其中底層係由環氧玻璃組成。 7. 如申凊專利範圍第5項之無引線式積體電路封裝件’ 其中該積體電路晶方具有小於33晶方觸點的?丨線數目。 S. —種構造無引線式積體電路封裝件之方法,該方法包 含步驟: 該底層係由絕 在底層之上側配置一連串的金屬合接墊 緣基板製成; 將一積體電路晶方陣列附接至金屬合接墊; 以包覆材料覆蓋積體電路晶方及底層; 將底層部份分割且電性隔離成個別晶方封裝件; 測試底層上之個別晶方封裝件以確定是否有任何製造瑕 疲;及 元全分開底層以使晶方封裝件分割成個別晶方封裝件。 9 ·如申請專利範圍第8項之構造無引線式積體電路封裝 件之方法,其中該積體電路晶方及底層個別具有一長度及
    D:\2D-CODE\88-05\88104633. ptd 第13頁 41979 9 六、申請專利範圍 一寬度,該積體電路晶方之長度及寬度小於該底層之長度 及寬度。 1 0.如申請專利範圍第8項之構造無引線式積體電路封裝 件之方法,其中該積體電路晶方及底層個別具有一長度及 一寬度,該積體電路晶方之長度及寬度等於該底層之長度 及寬度。
    D:\2D-CODE\88-05\88104633.ptd 第14頁
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