TW200405480A - Partially patterned lead frames and methods of making and using the same in semiconductor packaging - Google Patents
Partially patterned lead frames and methods of making and using the same in semiconductor packaging Download PDFInfo
- Publication number
- TW200405480A TW200405480A TW92110007A TW92110007A TW200405480A TW 200405480 A TW200405480 A TW 200405480A TW 92110007 A TW92110007 A TW 92110007A TW 92110007 A TW92110007 A TW 92110007A TW 200405480 A TW200405480 A TW 200405480A
- Authority
- TW
- Taiwan
- Prior art keywords
- lead frame
- wafer
- film
- lead
- patterned
- Prior art date
Links
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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
- H01L21/02—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
- H01L21/4821—Flat leads, e.g. lead frames with or without insulating supports
- H01L21/4828—Etching
- H01L21/4832—Etching a temporary substrate after encapsulation process to form leads
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- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements 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
- H01L23/495—Lead-frames or other flat leads
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- 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
- H01L21/4821—Flat leads, e.g. lead frames with or without insulating supports
- H01L21/4842—Mechanical treatment, e.g. punching, cutting, deforming, cold welding
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- 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
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
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- H01L21/561—Batch processing
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- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
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- H01L23/3114—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed the device being a chip scale package, e.g. CSP
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- H01L23/49548—Cross section geometry
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- H01L2224/11—Manufacturing methods
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- H01L2224/1133—Manufacturing methods by local deposition of the material of the bump connector in solid form
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- H01L2224/131—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
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- 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
- H01L2224/16245—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 metallic
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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
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Description
200405480 玖、發明說明: 【發明所屬之技術領域】 本發明關於一般的電子構裝,及更特別地,關於一部份 具圖案之引線框架與製造及使用該引線框架的一方法。該 部份具圖案之引線框架比傳統的引線框架更強及更穩定。 部份具圖案之引線框架的剛性改進製造引線框架封裝的製 程及增進終端產品的整體可靠度。 【先前技術】 使用引線框架製造電子構裝,有許多製程步驟使引線框 架承受機械及熱應力。目前引線框架更細的幾何形狀及半 導體晶片上一直增加的線路積體化已導致製程置放更大的 應力在引線框架上。細建構的引線框架常常表現精巧的鑲 邊,或模版金屬結構傾向彎曲、破裂、走樣及容易變形。(見 圖la及lb)。該傳統的引線框架被使用在 耒上以產生各種 的晶片封裝,包括打線接合與覆晶(FC)封裝。 I兄2a-2d及 1寻統的N琛柩 、 7丨深枢架的手 形部份可能相當的脆弱及難以固定在位 , 、 /、等致處理 破裂、傷W及在組裝製程的扭曲與複雜的打線接 結果,必需最佳化接合參數以補償接合製程期間心: 的反彈。最佳化接合參數以補償引線框架的機械不;: 4失敗可能導致不艮的接合黏著’及因此不良的品二 良的接合可靠度。 〃 /、 85098 200405480 視為晶片接收面積,也被視為一晶片焊墊。該晶片通常以 背面向下黏著到接收面積,及前面定位向上以端點座落在 晶片周圍,或以一陣列形式覆蓋過晶片表面。該接收面積 典型地具有約5 mmX5 mm的尺寸,及從晶片焊塾面積向外 I伸的引線典型地具有約1〇 mm長χl 厚的 尺寸。該引線框架典型地利用一真空吸盤與機械夾固定住。 對不同尺寸與形狀的引線框架,該吸盤與夾子必需重新裝 置。本發明減輕該問題。 先則技蟄沒表示任何引線框架可以忍受在目前的半導體 構裝製程考慮到的應力及可以一合理成本方式製造。本發 明利用提供一部份具圖案之引線框架達成該目@,不僅擗 進該引線框架本身的可製造性,而且增進從該引線框㈣ 成的電子封裝的集積性與可靠度。 本發明提供一部份具圖案之引線框架用在半導體構裝。 该引線框架包括具有—上表面與底表面的膜。該膜的第— 區域是從上表面部份形成圖案但非完全通過膜到底表面。 該膜的第二區i或,沒從上表面形成圖案,形成一晶片接收 區域用來支持-積體電路(IC)晶片及許多引線接觸用來提供 電氣連接到㈣晶片。第—區域在膜中形成溝槽及產生— 網狀結構連接沒從上表面部份形成圖案的第二區域。本發 明也指向一製造部份具圖案之引線框架及指向利用該引: 框架製作的電子封裝件。本發明的引線框架因為其網狀、 或網狀結構已增進結構的剛性。 85098 200405480 根據本發明,一金屬膜的上表面,引線框架從該表面形 成’使用標準光微影技術或相似的技術描繪將對應一晶片 接收區域及引線區域的輪廓首先形成圖案。在下一步驟, 從部份通過膜下厚度的膜之上表面實施蝕刻在描繪輪廓區 域之外的膜之第一區域以在膜中產生一引線框架。部份圖 案形成之後,從上表面沒形成圖案的剩下區域形成第二區 域’其將作為一晶片接收區域及沿上表面的引線。第一區 域形成一凹陷網狀區域在膜的上表面之下。第一區域的網 狀〜構彼此連接引線部份及連接晶片接收區域。因此,該 部份具圖案的膜看起來類似一網狀的腳及保持其剛性性與 強度以致其可以忍受後續製造製程步驟的力量。特別地, 該部份具圖案的引線框架可以忍受打線接合與封裝製程期 間所考慮的力量。在某些具體實施例,該接收區域及電氣 引泉可乂彳文第一區域的相同部份形成(例如,在電氣引線支 撐積體電化晶片的情形同時因此提供電氣連接)。 本*月也才疋供使用部份具圖案的引線框架製造許多電子 封裝的唯一方法。今古、、土 ~ 4 、 μ万法匕括具有一上表面及一底表面之 膜的方法。在第一區域中, , ^ Τ 巧胰仗上表面邵份形成圖案但 沒完:通到底表面。沒有從上表面部份形成圖案在膜上剩 下的弟-區域形成許多部份具圖案的引線框架。每個引線 框架具有一晶片接收區域 ^ 飞以支粉和體電路(1C)晶片及許多 電氣引線以提供電氣連接到該ic晶片。 該膜的第一區祕π』 y 或形成一網狀結構連接晶片接收區域及各 個引線框架的電齑引玲 以 、、、泉。罘一區域也互相連接許多引線框 85098 200405480 架在膜的通道部份。 提供許多晶片,每一晶片且有 机e ^ 、力并夕電氣端點用來黏荽釗
對應的引線框架。每一晶片黏著 、晋J ^ ^ 考司對應引線框架上的曰珐 接收區域及一電氣連接形成在每—曰 日曰片 、、泉框架的電氣引線之一之間 ”、、”引 门 因此,使用一封裝材 引線框架及膜的通道部份以完全 误| 仅|月旲的頂端。一去圭+ # 材料乾燥,從第一區域膜的底面奮北 ^ 她 冃面圖案形成製裎 以私除網狀結構及膜的通道部份。受苦# 、 、、 置復|技的通道部份 封裝材料於是被切斷形成個別的封裝件。 在一車父佳具體實施例中,該方法包 、 L括开y成引線框架的膜 為-方塊/窗形圖案的矩陣,及包括製造晶片尺寸封裝件。 本發明部份具圖案的引線框架有許多好處。引線框架平 坦及堅固未蝕刻的底表面在打線接合製程期間做為一極佳 的熱庫。其提供更佳熱傳及更一致的接合品質。並且,該 堅固的結構提供-連續的表面給—通用的真空吸盤來向 抓住引線框架,因此在後續的製程步驟期間使晶片黏著製 程更穩足及該引線更安全。消除引線框架外緣的笨拙夾住 以允許一陣列矩陣引線框架設計及不需製程的轉換。因為 部份具圖案的引線框架之底邊是一平坦連續的表面,可以 用一通用的真空吸盤來抓下許多不同大小的框架。其去除 每次使用在構裝製程中不同尺寸的引線框架必需重新裝配 真空吸盤的複雜性。而且,不需進一步夾持。使用一通用 的真空吸盤及消除夾持使在第二區域上的二或三排搖晃的 引線結構能夠用在更高的引線範圍目。 85098 -10- 200405480 本發明指向一邯份具圖案的引線框架其將調整打線接合 的曰曰片與焊錫凸塊化的覆晶。並且,本發明教導使用部份 具圖案的引線框架的方法以製作蝕刻引線框架封裝(ELp)其 使用打線接合,具覆晶的ELP(ELPF),及也具基板柵格陣列 (LGA)焊墊的ELP或ELPF以形成蝕刻基板柵格陣列(ELga) 封裝’其進一步說明在本發明的具體實施例中。 覆晶(FC)技術是向充分自動化接合一晶片上電氣端點到 下一階層構裝,也就是說,到一陶瓷或高分子基板的更加 一步騾,或到其稍後接合到該基板的一晶片微載具。該微 載具,其僅稍大於晶片本身,現在稱為晶片尺度封裝(csp” FC技術發展自薄帶自動接合(TAB)其也是打線接合(WB)的 起源。然而在WB與TAB,該晶片被定位在其背表面及做電 氣連接至位在其上表面周圍上的端點,在Fc技術中晶片的 万向被反向。該晶片面向下置放及晶片背面向上。本覆晶 方向具有重要的好處,其中其集中電氣功能在晶片背面上, 留下自由的頂邊用在發展高效率熱傳設計。 在FC製程中’晶片端點或接合焊墊以不同型式的凸塊覆 盍在晶片表面,其中圖案可以被配置在一面積陣列、周圍 圖案或其他圖案上。該晶片可以下列方式黏著到下一階層: a)FC黏著到一引線框架;b)一層/基板,已知為内插板,的pc 黏著’用來路徑重建一引線框架上的連接空間;c)Fc黏著 到在引線框架上的一預黏著内插板;或d)使用傳統技術, 包括晶片迴焊方法,FC黏著到一印刷電路板。
Flat No 使用傳統技術的晶片黏著當應用到QFN(Quad 85098 -11 - 200405480 ❹)W、、泉框架製造QFN封裝及其衍生物如VFQpF-N時, 變成特別地困難。這是因為該傳統的引線框架一般缺乏結 ,的剛性。引線框架的手指形部份可能相當脆弱及難以固 、在知確的位置。其導致組裝製程中處理的破裂、傷害 及扭曲以及複雜的晶片接合情況。Fc接合製程要求凸塊焊 錫精準的對位懸掛及脆弱的引線框架之引線端。甚且,濕 的焊錫端在經焊錫迴焊製程的置放後必需保持它們的位 置結果,迴焊參數必需最佳化以補償晶片接合期間引線 框架的反彈,假如做得不適當,其可能導致不良的接點, 及寸致最終產品不良的品質與不良的可靠度。 般貫際上利用形成一光阻圖案在一條金屬、或金屬膜 上以形成傳統的模版引線框架,及經由蝕刻該圖案以形成 k晶片接收區域延伸向外的手指形引線。通常也在指形之 間使用”拉桿"以致指形在各種製程步驟期間保持分隔,如 圖3a及3b所示。本發明利用形成一網狀、部份具圖案的引 線框架取代一模版引線框架減輕引線框架缺乏結構剛性的 問題。 根據本發明的方法,所有形成一半導體封裝的主要製程 步騾從變成一引線框架的膜之一邊實施。另一邊稱為底邊, 保留平坦及不接觸在一表面上,如一真空吸盤的表面。其 包括封裝及氣密密封部份形成的封裝件前邊。一當完成封 裝,該底表面背向蝕刻以選擇性地移除彼此連接的引線及 連接到晶片接收區域的網狀部份。在ELP情形中,其晶片背 向接合到在晶片接收區域的晶片焊墊及利用打線接合電氣 85098 -12- 連接到晶片嫂. 在打線接: 斤有中間網狀部份嚴重的經過银刻以致 該曰片… "墊與孩购妾觸現在利用包園 日曰片 才線與打線接合的接觸p托、、,士 彼m' 要口的接觸E域 < 丽表面的成型材料 彼此1¾離。然而, 丁 網狀部Π _ 3形中,僅彼此連接引線之 、、运 刀嚴重的經過钱刻, 頭的凸塊以為以本身連㈣晶片烊錫 捉仏私乳連接到下一階層的構裝。 經由移除網狀部份 居開厗度,或通道的埋入金屬具有 °夕r包括消除傳播通過引線框架結構的鑛開力量, 及因此,防止金屬-高分子界面的剥離。而且,經背向蝕刻 的電氣絕緣使任何切割或切斷之前能夠條狀測試,或任何 、/衣t步,¾《w ’做該事項。在背向圖案形成之後, 在底表面上剩餘及曝露的金屬部份接著可以任何數目的可 焊材料經浸鍍錫浸鍍或盔
…兒鐵‘几成閃党。然而,該ELGA 挂于裝使用ELPF_i裝的Fr ' ’以LGA焊塾用來連接到下一階層 的構裝。 為了防止製造期間成型材料與其他封裝元件間的分離, ^發明也教導在部份钱刻的引線框架之凹陷網狀部份的曝 I垂直土 Ji如私與成型材料如樹脂接觸的引線的側壁上, ^何$成捲毛特欲。另外’本發明也教導形成"唇”在晶片 Ή W引、、泉接點的邊緣上以致抓住在每個唇下的成型材 料,因此使成型材料難以從偶配表面分離。 月頌的伙刖述部份蝕刻的引線框架提供均一的結構與附 加的剛性及強度以叹夸兩又± L ,,,., &心又%子封裝製造的各種製造程序之應 力及應變。因為這些均—的機械性質,部份蝕刻的引線框 85098 -1: 200405480 架封裝也可忍受嚴格超音波導線接合到連接到下_階 裝的封裝件底部,其迄今在傳統的高分子封裝已是不可:。 ί本發明另—具體實施例中’是形成具有超音波接合導線 包子封裝的-万法。形成—塊部份姓刻的引線框架,其中 孩引線框架包括網狀部份與利用通道部份彼此分離,^有 一j續的底表面。晶片黏著到引線框架上的晶片接收區域。 :每-晶片端點與對應的引線框架的電氣引線部份間做電 氣連接。導線被超音波接合到引線框架的底表面。利用: 封膠材料覆蓋包括隔離引線框架的通道部份之該引線框架 加以封裝該引線框架。接著實施底表面的背向圖案形成以 移除網狀㈣份與通道㈣份。封裝的引線框架接著於通 道部份被切斷以形成在底表面上具有超音波接合導線的個 別晶片尺寸封裝件。 【實施方式】 圖4-1 5b及16-24b表示形成一部份具圖案引線框架的封裝 具有引線範圍相當於接近晶片尺寸封裝(csp)的不同具體實 施例。本發明的方法改進製造線的自動化與用其製作封裝 的口口頁及可罪度。其完成是利用實施一主要部份的製造製 程步驟具一部份具圖案的金屬膜形成一網狀引線框架在一 邊上。與傳統地穿孔模版引線框架相比,使用在本發明的 引線框架是部份形成圖案在一邊上及在另一邊是堅固的與 平坦的。本結構改進了機械上與熱學上,及在實施晶片黏 著、打線接合與封裝製程期間沒有扭曲或變形。晶片黏著 與打線接合製程步驟完成以及晶片與打線接合被固定及氣 85098 -14- 200405480 密封裝在一成型材料之後, 引線與晶片焊墊彼此的接觸 切斷沒殘留多餘的金屬。 底面钱刻完全通過薄膜以隔離 。結果,所得封裝的封裝件被 更特別地,圖4_15b表示形成一部份具圖案的引線框架用 在打線接合的晶片及使用該引線框架用來形成一 ELP刑4 私子封衣的万法。另一方面,圖16-22表示形成—部份具圖 木的引線框架用在一覆晶及使用該引線框架用來形成一 ELPF型式電子封裝的方法。—種形成此以型式電預裝 的万法’使用目前部份具圖案的引線框架,也連結圖%與 24b—起做說明。 ” 圖4是一膜的橫截面圖示,較佳地是一片金屬,較佳地是 銅,其不僅是形成一引線框架,而且在形成該引線框架的 後績製程步驟期間做為一穩定載具。該條金屬的厚度等於 或大於0.05 mm。在另一具體實施例,該厚度可以在⑴㈦至 〇·5 mm間的範圍。 形成一引線框架典型地包括切出一條金屬,如切一模版, 及接著做成很細的指形引線。為了抓住該精巧的結構在同 一平面,可以使用真空吸盤。然而,傳統的真空吸盤典型 地不適合提供吸力吸住該精巧的裝置及該引線框架通常必 需夾住周圍。為該目的使用任何一套裝備從一型式及尺寸 的引線框架到另一型式及尺寸的引線框架必需重新裝置。 然而’本發明解除該再裝置的步驟。因為部份具圖案的引 線框架之底表面是堅固的及連續的,一傳統的真空吸盤在 製程期間可以容易地抓住該引線框架在同一平面。甚且, 85098 -15- 200405480 可以調整各種工業引線框架的一條狀金屬尺 』』以通用在 引線框架的製造。晶片黏著與打線接合的後續製程步驟可 以完成具有相當較小的應力及應變在形成的W線框加上 因為引線框架被網狀結構抓在一起及直到最後步驟彼此不 分離’可以製造具有較細幾何的引線框架。 在引線框架上各種圖案的形成可以用許多 /々八元成。其 一途徑可以是戳印/鑄造圖案在金屬中。其他途徑可以包括 化學或電化學研磨及放電加工(EDM)。另—方面,光:影 形成圖案,其是半㈣製.造較喜歡的主要依靠。在本發明, 圖4所示的金屬條(1〇〇)在光微影形成圖案之前在前以上)邊 及背(或底)邊兩者預電鍍。前表面與背表面兩者之任一面= 以-材料預電鍍使個別地能夠接合及焊#。在—具髀眚^ 例,該前表面以—可接合的材料如Ni/Pd/A晴塊二= 鍍。在另-具體實施例’該背表面以一可焊接的材料如 Sn/Pb、無鉛烊錫,浸鍍錫、無電鍍鎳或Au熔塊預電鍍。假 如需要,孩預電鍍可以在一稍後步驟實施。 ,在下T步驟’該預電鍍的前面⑴〇)被光微影形成圖案以
形成對應晶片焊塾H LL τ-(115)昇包圍孩晶片烊墊區域的電氣接點 =)^廷氧接點⑴3)可以具有特徵為一引線的端點部份 2成網狀結構的中間凹陷部份之第一區域連接到晶片焊 土區域(11 5)。這些中間凹陷 、 丨曰日7,码狀部份當金屬膜(1 〇〇)從背 面被I虫刻時在一雜德陆問 稍後時間被移除以致端點部份與晶片焊墊 部份將彼此隔離。包括一曰巧 ^ 有時被稱為晶片位置。:二了^ 干夕日曰片位置可以形成在以鏈輪扣 85098 -16- 200405480 到線軸的連續銅片捲上,以容易自動化形成包括—或更多 晶片位置的引線框架。圖5說明兩晶片位置,其將被形成兩 對應的引線框架,其接著將從它們形成兩封裝的零件。 圖5所示說明兩晶片位置的圖案接著利用蚀刻轉換成膜條 陶。如圖6所示’本發明一主要的特徵是僅對通過金屬的 邵份厚度實施㈣,其在文中被稱為部份形成圖案。部份 形成圖案實施在膜的第-區域以形成—網狀結構(13〇)其連 接個別引線框架的引線接點(113)之晶片焊墊G 15)。該第一 區域也在膜的通道部份(丨.3 6)彼此連接引線框架。 如圖6a-C所示,一矩陣或該引線框架(例如,ΐ6χΐ6)可以 形成在-方塊/窗形膜(138)中。如圖外與6。表示第__區域包 括該網狀結構(139)連接晶片焊塾與各引線框架的引線接 點。第-區域也在㈣通道部份(136)彼此連接許多引線框 架。 从在-具體實施例,該部份形成圖案可以改變挪至9〇%的 膜厚。然1^ ’該部份形成圖案事實上可以是任何膜厚的百 分比及部份㈣量的決定可以利用考慮影響可製造性參數 的各種因子,包括可撓性、剛性及熱厚度(或熱傳導度)。引 線接點區域⑴3)與晶片烊塾區域⑴5)的側邊尺寸可以根據 所給晶片尺寸所需最小化的程度決定與打線接合或其他介 質可以用在下-階層構裝的已給封裝或封裝間的層間或層 内連接。特別注意對細外觀可製造性及引線框架尺寸穩定 性的考量利用手指形引線的網狀結構現在較不重要。 如圖7a所示’晶片(140)接著黏著到晶片焊塾區域。較佳 85098 -17- 200405480 地使用一環氧樹脂(150)。圖7b是報 墊之間接點的、“固 疋根據本發明晶片與晶片焊 環氧二大圖’表示包括環氧樹脂或桿錫的黏著。 銥氧树脂(150)可以填充導電粒子以 焊錫膏05。,,取代環氧樹脂(15。),:;“的、卻。或者, 曰妗庐勒、 1 )也可以用來提供晶片與 二ΓΓΓ更強的接合及到周園環境更有效的冷卻路 :::所示,環氧樹脂被固化。晶片黏著後,使用 〇45)及Π 術,如圖8所示,導線(160)被接合到端點 匡加且:應的引線接點(113)。因為根據本發明形成的引線 剛性的置放及抓住在-平:二 線接合期間不跳動或反彈該42=網狀結構在打 終端產品的可靠度。果為極佳的接合,其改進 —中,連接晶片與對應的接點後’在金屬膜前面上所有 兀件接耆以例如樹脂的成型材料做氣密封裝。封膠(零 =膜及所有曝露的表面上,包括引線框架及它們的結合 寸線(160)、曰曰曰片(140)及接點⑴3)與網狀結構(叫及通道 部份(136)。當提升所得的模型封裝’乾淨的背面現在可用 到進一步製程。使用本揭露方法消除模料溢出到封裝之下 的腳座之問題。 圖10所示’引線接點⑴3)與晶片焊塾⑴5)兩者現在可以 艮好彼此隔離利用通過封裝背面触刻第_區域的網狀結構 (^35)以形成它們自己的島嶼。在該點,通道部份⑴6)也被 背向敍刻。繼續背向蚀刻直達到成型材料。背向姓刻金屬 的触刻方法應該與用在前面的相同。然而,背面的姓刻時 85098 -18- 200405480 間可以鱼用左 、 /、 則面的不同,依據從前面實施的部份蝕刻程 q 、走因此’起始形成的部份蝕刻引線框架可以習慣裁 製成通合用做最後封裝的自動化、品質、可靠度及功能性 的製造要求。 做為最後步騾,覆蓋引線框架間的通遒部份(136)之封膠 (、 、)被切斷形成兩個別的封裝件如圖11所示。其以許多種 =式心成,包括鋸子切片、水刀切割、雷射切割或其組合, ,二他特刎適合切割鬲分子的技術。換句話說,沒有更多 金屬切穿及因此沒有剥離與其他問題伴隨結合高分子與金 屬的切割。其與傳統封裝比車交,通道間架橋金屬必需在封 农被切斷的同時切斷。許多時候,當同時切斷金屬與高分 子兩者時,某些金屬碎片將短線及接觸,在鋸片上引起不 要及無可預測的磨損。如圖6a所示,該方法也可以應用從 一矩陣引線框架製造許多封裝件。 一切斷的ELP上視圖如圖12a所示,其中表示接點(12⑻與 晶片(140)彼此隔離在它們自己的島嶼上,但僅經由已打線 接合的導線(160)彼此連接。圖12b表示晶片與包括一部份原 釔金屬條(1 00)的接點之一間的一封裝角落之放大圖示,一 上表面預電鍍形成可接合層(11 3),及一下表面預電鍍形成 可焊接層(123)。圖12b中,表示一”唇,,在晶片的接點與角落 兩者之上。 在封裝下方之上的預電鍍表面(1 2 〇)現在可用做許多目 的。首先,直接外接到晶片焊墊(140)的背面(125)提供一増 加的熱路徑用來冷卻。第二,接近晶片尺寸封裝(csp)腳架 85098 -19- 200405480 内的接點(123)使其可能在下一階層的構裝黏著緊密空間的 封裝件,及因此增加在相同區域的功能。 本發明另-方面提供-方法用來減少成型材料與將黏著 表面間剝離的可能性。完成利用半蝕刻晶片焊墊周圍與接 點區域的邊緣以形成一凸緣或一,,唇”,如參考圖丨孔中的數 子(105)。也可能形成圖12c中所示的不規則形狀空腔(Μ?) 以增進與成型材料接觸的表面之互鎖機構。各種其他空腔 的放亡圖示也表示在圖i 3 a _! 3 f,及這些增強表面的形成可 以從前面結合進部份蝕刻。其將不必從背面蝕刻,因此成 型材料僅封裝從前面部份形成的表面。 圖14總結本發明的方法其開始從前面部份蝕刻一引線框 木(200)成-金屬條及結束以同—方式背面圖案㈣⑵〇)相 同的金屬條以致形成所需的晶片焊塾與周圍的接點。因為 泉/ L接迥過在金屬膜中邵份蝕刻的類網狀或網狀紝 構上中間凹陷部份的第一區域,晶片黏著⑽)、環氧樹: 固化(220)、打線接合(23〇)及封裝(24〇)的中間步驟 在機械上與熱學上穩定㈣、隸架。也重要的注意僅封^ 的所有元件已保護在一封膠内之後,中間凹陷部份的第一 區域經由背面圖案钱刻(25〇)移除,及為了適當隔離,周圍 接點及晶片焊塾做&他^ 成彼此刀離。結果,在分割(260)成單獨 、、叩尺寸封裝期間不需切穿任何的金屬。 本發明的方法可以用來形成廣泛各種封裝,如用在一兩 =的-陣列型式的引線框架。一陣列型式封裝(4。。二 圖15b所示,接著如圖…所示為標準的周邊 85098 -20 - 200405480 封裝(300)。其中數字(305)指示晶片端點的一周邊排列,數 字(405)指不端點的一陣列型式排列,其可以建構成行或交 錯。使用本揭露的部份圖案形成之發明形成兩封裝件如參 考數字(3 10)與(41〇)所示。在陣列型式ELp中,内引線(料⑴ 與外引線(445)如所示。兩封裝件被封裝在成型材料(32〇)或 (420)中。背面圖案蝕刻以隔離接點與晶片以(33〇)與(4儿)指 示。數字(45G)描述-接地環外觀,其被㈣成與模型在相 同的階層。數字(46〇)指向ELp底視圖上睁列型式的輸入/輸 出建構。 附圖16-24b所示的第二具體實施例揭露形成—部份具圖 案的VFQFP-N型式引線框架,其特別地適合大量生產%電 子封裝。因此,製作來調整覆晶的引線框架將被指示為瓜, 以與傳統的引線框架做區別。這是因4,不像傳統的引線 框架,FCL較剛性與更適合自動化的製造線,如下說明。 與傳統所有目的之穿孔、模版引線框架相比,FCL也是 類網狀結構。—網狀FCL的前邊具有凹陷截面,包括部份形 =圖::引、’泉’其背面是堅固與平坦的。其提供機械的剛 程期間實施而無扭曲或變形。在完成晶片黏 封衣m 1虫刻背面以彼此隔離引線接點。結果,
明%的订夕餘的金屬’所得的封裝是切斷的。因此,FCL 明頒的具較細的雜、^ 地製造以致引線以_^=购的封裝件,可以容易 糊大或網狀結構固定在-起,及直到 取後切所的步驟,不完全彼此分離。 如已揭露第—具體實施例部份形成圖案的⑽框架,第 85098 •21- 200405480 二具體實施例的FCL也從—片金屬形成,較佳地如圖4所示 的:扠’ *中前表面與背表面兩者預電鍍或如前所述,該 ^鍍可以延緩到稍後步驟。(應該知道’對兩具體實施例 k 步驟{相似的,除了第二具體實施例以,表示的那些 外’參考數字已保持相同。相同參考數字(⑽)已維持一: 用在兩具體實施例的今 ^ 光微影形成圖案㈣成Γ 前邊(110,)
y成日9片接收區域(115丨)、包圍晶片接收 h域的引線部份(丨n,),π # L 程步驟下 U中間區域⑴7,)。後續的製 1句路 面,引線的一端點部份將連接到:pc的端點, 而其他端點部份將連接到下一階層片 收區域與包圍的引線之^&、女土 日曰片接 域有時稱為一晶片位置,相似於 具打線接合的晶片之曰& 、 片m 叩片位置。許多引線框架包括許多晶 片/置可㈣成在間料料㈣料捲繞銅片上以;
易自動形成包括—或更多晶片位置的引 J 兩個晶片位置,呈脾γ 4 & 口丨6况明 從盆中开…⑷ _?丨線框架,其接著將是將 仗/、中形成的兩封裝的零件。 卞 圖16說明所示兩個晶片位 份圖案形成轉成金屬 广Ά由钱刻利用部 以達到二…、: 目17目案形成可 F. 刀爻一、或對該物質,任何比率的八 Μ子又’及邯份蝕刻量可以藉考 最 性參數,包括可撓性、剛性;^厂、 U于以善可製造 引嗜接觸二;度(或熱傳導度)來決定。 丨綱£域⑴3’)與晶片區域⑴戰 所需取小化程度決定用在已知 7根據 可以被用在下一階;槿壯' 罝匕括叩片大小及其 層構已給封裝或封裝之間的層間 85098 -22- 200405480 或層内連接之引線。特別注意關心的引線框架微細特徵與 尺寸穩定性之可製造性利用類手指形引線的網狀結構現在 較不重要。 覆晶(FC)(1 30’)接著被覆蓋以致在晶片前面上的端點35, 座落在引線的一端點部份,如圖18所示。在稍後步騾,引 線的相對端將形成電接觸連接到下一階層的構裝,如一卡 或板然而首先,如圖1 8所示晶片組裝在類網狀引線框 架結構上,被送通過本技藝常用的晶片接合爐。錫球被迴 弹以致迴焊被BLM限制,因此形成録。因為根據本發明 形成的引線框架具有一堅固的、連續的背面被牢固及抓住 在一平坦表面上,該引線的類網狀結構在晶片接合爐中不 動搖或反彈,目此產生極佳的晶片接合。結果,本揭露方 法增進最終產品,亦即VFGFP-N型態封裝件,的可靠度。 晶片接合後,晶片與在最初金屬膜前面上部份形成圖案 的^丨線接著被氣密封裝在一成型材料中,例如圖19所示為 一樹脂。封膠(140,)形成包裹所有曝露的表面、包括所有引 線⑴3’)、圍繞錫球(135,)、晶片之下方、沿著凹陷晶片接 收區域的垂直壁(115’)、及除了未㈣外的凹陷區域之垂直 壁(117’)、抓住牢固在一平坦表面上之金屬條(100)的堅固及 平坦的背面。f掀起所得模型的封裝時,乾淨的背面可以 用來進-步製程。模料溢注到封裝下面上的腳架之通常考 慮的問題在本具體實施例也被消除。 利用通過封裝件背面形成圖案對準在起始步驟已從前 邵份姓刻之,引線(113,)間現在已可以彼此隔離。繼 85098 -23- 200405480 、、向餘亥]直到達成型材料。如圖20所示,引線框架的 颏、’’罔狀部份,稱為區域(ul,)及(119,),被移除而中斷彼此 的曰曰片區域(115’),及彼此的引線(113,)。較佳的用來背向 形成金屬圖案的蝕刻程序與用來從前面部份蝕刻的程序相 同然而,從背向的蝕刻時間依據從前面實施的部份蝕刻 私度可以與用在前面的不同。因&,部份蝕刻引線框架的 起始形成可以做成適合最後封裝件自動化、品質、可靠度 度與功能性的製造要求。 做為最後步騾,圖20的封裝,為了說明本發明的目的具 有兩封裝的晶片位置,接著被切斷成單獨的接近晶片尺寸 封裝(csp),其為更多VFQFP-N型式的封裝件,如圖2丨所示。 一切斷的邵份形成圖案之引線框架封裝的上視圖如圖22a所 示,其中所示引線(113,)彼此隔離及連接到晶片(13〇,)下面 上的錫球(1 3 5 )。圖22b表示晶片與連接到可以提供在__^ 或一板(150’)上的外部接點(145,)的引線之一之間封裝角落 的放大圖。該預電鍍表面(12〇|)已準備接合到同一圖中所示 的下-階層的接點。而且’引線(113,)的下面⑴4,)曝露到 周圍環境,因此提供增強的冷卻。 如揭露相同的技術以前被用來防止封膠從F C L表面剝 離,亦即利用結合圖i3a_丨3『網狀引線框架凹陷區域(115,)與 (117,)的垂直壁上不規則形狀的空腔。這些表面強化的形成 已可以結合到從前面的部份蝕刻。其將不必從背面蝕刻, 因此該成型材料僅封裝部份從前面形成的表面。 圖23總結本具體實施例的方法以從前面部份形成引線框 85098 -24- 200405480 木(200 ) H金屬條為開始及以該方法背面形成相同金 屬條圖案(240’)為結束以致形成所需的晶片接收區域及包圍 引線。因為引線仍舊連接通過金屬膜中部份触刻的類網狀 結構,該FC放置(210,)的中間步驟,%晶片接合(22〇|),及 封裝(230,)全部完成在機械上與熱學上穩定的。重要 注意的僅所有封裝元件已保護在封膠内之後,引線的網狀 部份選擇性經由背面圖案㈣()被移除,及引線被做成 彼此適合切斷的隔離。結果’在切割(25〇,)成單獨接近晶片 尺寸封裝件期間,不需切穿任何金屬。 本發明S法可以用來形成廣泛的各種封裝件,如一陣列 型式的-部份圖案之引線框架,其中一區域陣列的坪锡凸 塊可以利用晶片覆盖同時晶片接合到引線框架上,相似於 揭露在本文中以一周邊組的焊錫凸塊的方法。而且,可以 同時形成一陣列具部份圖案之引線框架,及接著也同時FC 接合,接著利用陣列切斷成眾多分離的型式vFQFp_N封裝 件。而且,各個所得CSP於是可以提供具有焊錫凸塊、焊塾、 或其他電氣連接在封裝之下,以用在陣列型式接合在下一 階層構裝,以形成一具有球柵陣列的蝕刻引線框架封裝, 或ELGA型式封裝,如圖24a及2朴所示。圖2鈍中,表示一 橫截面’丨中晶片焊墊(135,)形成在?丨線(145,)上。接著背 面形成圖帛’引線(145,)彼此電氣隔離以接合到下一階層Z 封裝。該(145')曝露的底表面可以任何數量的可桿材料經浸 鍍錫浸鍍或無電鍍鎳披鍍完成晶亮。此〇八封 2 (111,)如圖24b所示具有一用來電氣連接(145,)的陣列圖案。 85098 -25 - 200405480 0為开7成任- ELP、ELPF或ELGA封裝的部份姓刻方法在 各種製造步驟期間提供穩健性,其他電子封裝的形成也有 可能…種該形式包括本發明引線框架封裝的打線接合到 下处P白層的構裝。因為引線本身的脆弱,超音波接合技術 不此使用在傳統的引線框架,除非它們被黏著到一剛性底 座以&供%、疋性及強度。相&,部份餘刻的引線框架利用 它們的網狀結料穩^的。部份㈣的引線框架之未餘刻 與預電鍍的底表面(120,)提供剛性的接峨 地j用超音波能量對铭導線楔形物接合在£1^或队卯方塊 二、、上Q此,根據本發明另一方面,鋁導線(12 1)被超 皮黏著到塊狀或條狀部份蝕刻的引線框架之底表面 上’如圖25a所示。該導線直徑範圍約〇 〇〇1叶至〇·刚忖之 ^後者的直徑代表帶狀而非線狀。該條形接著被封裝, :面形成圖案與切斷以形成個別的接近CSP。超音波接合是 而要的’因為其避免曝露至球柵卩車列型式封裝所經歷的錫 球接合溫度’ 1因此增進可靠度。銅導線球接合也可以應 用如圖25b所示。將瞭解如圖25a及25b所示CSP可以是任一 ELP與 ELPF。 &月對私子封裝的製造製程提升許多增加的好處。例 如在θ面蝕刻之後及切斷之前,當封裝仍舊安排在方塊 内時^封裝將緊接著準備做條狀測試。其與處理該封裝 成個别早70相比提供一重要的好處。當其被安排在一方塊 内時,增進測試的可靠度。 本發明也使一製造廠能夠製造封裝具有兩或三排交錯的 85098 -26- 200405480 引線其可以倍增一所給封裝的I/O容量。該引線框架平坦連 矣買的底表面使能夠使用普通的組裝設備,其不需對每個應 用重新裝配,及其完全地對自動化具有彈性。例如,2 x 2 至12X12封裝方塊間之製程不需要任何機械改變。並且, 本發明容易促進封裝結構對每一支腳具有一 ”分離”(例如, 模土肋:的底#在腳的表面間是2㈤…)。當晶片封裝被連接 到下一階層的構裝如一板時,該分離提供更加的好處。 然而本發明已特別的表示及參考特定的具體實施例說 明’热悉此項技藝人士應該瞭解可以做形式及詳細的改變 不偏離本發明的精神及範圍。 【圖式簡單說明】 圖1 a疋根據先‘技蟄,具有引線及一晶片焊墊區域之一 傳統引線框架的圖示。 圖lb是根據先前技藝圖la傳統引線框架的圖示,表示晶 片黏著到晶片焊#,及晶片上端點到引線的打線接合。 圖2a是根據先前技藝,—打線接合的與(用引線)拉引線的 接近晶片尺寸封裝(CSP)之橫截面圖示,表示利用引線連接 到下一階層的構裝。 圖2b是根據先前技藝,一 & 的 下 、 ^ 打線接合的與(不用引線)無引線 接近-CSP之橫截面圖示,矣— 口丁 表TF利用焊錫凸塊或球連接到 一階層的構裝。 團2C定很艨先前技 、 -—^ ^ ^ 截面圖示,表示利用引線連拉 良運接到下一階層的構裝。 圖2d是根據先前技藝,一费 设日曰與無引線的接近-CSP. 85098 -27- 200405480 截面圖,表示利用錫球連接到下一階層的構裝。 圖3a疋根據先前技藝,一模版引線框架的上視圖,表示 月面接5的日曰片打線接合連接到引線框架的引線。 -圖3b是根據先前技藝,一模版引線框架的上視圖,表示 I一烊錫迴焊製程一覆晶連接到引線框架的引線。 圖4是根據本發明,以一可接合材料預電鍵在均勾厚度的 金屬膜兩邊之橫截面圖示。 、圖疋根據本發明’圖4金屬膜的橫截面圖示,其中僅對 應兩阳片位置的表面上的預電鍍已形成圖帛,其每一位置 包括-晶片坪墊與包圍每一晶片焊墊之引線接點。 、圖6是根據本發明,圖4電鍍金屬膜的橫截面圖示,並已 部份形成圖案。 圖6 a疋根據本發明 架的上視圖。 表示一矩陣的部份具圖案之引線框 不矩陣中的引線框架之漸進放大的 圖6b及6c表示圖以所 上視圖。 二圖:是根據本發明’圖6部份具圖案的金屬膜之橫截面圖 /、中 日曰片已被黏著到在1¾曰ti· /上罢、々/ ^ j社啕日曰片位置 < 各個晶片焊墊 上0 土 —圖7b是根據本發明’晶片與晶片焊塾間之接點的放大圖 不,表不包括環氧樹脂或烊錫的黏著。 圖8疋:據:發明,圖。或%晶片黏著的金屬膜之橫截面 :二、’、母個晶片上的端點已被打線接合到形成在每個 曰曰片位置上的引線部份。 85098 -28 - 200405480 圖9是根據本發明,圖8打線接合的引線框架之橫截面圖 不,其中金屬膜的上表面,包括該晶片與打線接合已被氣 金法、封在一封膠中。 广圖1〇是根據本發明,已從背面蝕刻移除每個引線框架的 弟一區域與膜中的通道區域之圖9的氣密緊密封裝之橫截面 圖示。 圖11是根據本發明形成兩分離的封裝件,兩接近晶片尺 寸部份具圖案的封裝件之橫截面圖示,其中該封膠已在通 道區域被切斷。 圖12a是根據本發明,圖12的切斷封裝件之一的上視圖, 表不攻日曰片、接點與導線連接晶片端點到引線接點,及具 有一打線接合的接點之一的放大橫截面。 圖12b是根據本發明,晶片焊墊與接點之一之間區域的橫 截面圖示,表示為了提供錨定與防止剝離使用垂直表面上 的’’唇”與成型材料接觸。 、圖12c是根據本發明,晶片焊墊與接點之一之間區域的橫 截面圖示,表示為了提供錨定與防止剝離使用垂直表面上 不同形狀的空腔與成型材料接觸。 圖13a-13f疋根據本發明,可以被使用來提供錨定方法給 圖12bM12e中所垂直表面上的成型材料之各種空腔圖。 圖14疋根據本發明,總結形成一部份具圖案的封裝的各 種製程步驟之流程圖。 圖15a疋根據本發明,表示一封裝件具周邊〗/〇建構之上 視、側視及底視圖。 85098 -29- 200405480 圖15b是根據本發明,表示— 之上視、側視及底視圖。封裝件具則《陣列建構 圖16是根據本發明,圖4一 斟虛而牵曰a $ "筍胰的橫截面圖示,其中僅 對應兩復日日位置的上表面之 僅 勺紅一曰^包麵已形成圖案,其各位置 c括一日曰片接收區域及包園各 置 Q日曰片接收區域之引線。 圖^根據本發明,圖 線框架(即網狀結構)之電鍛金屬膜的橫截面圖示。引 圖18是根據本發明,表 引嗖拒加mm、、 设卵(FC)接合之一晶片接合的 引、、泉框木(FCL)艾橫截面圖示。
圖19疋根據本發明,圖1 $ F ^ CL的檢截面圖示,其中会 膜的上表面,包括兮曰片、 … 邊日曰片已氣密封裝在一封膠中。 圖2 0是根據本發明, 北 <同面I虫刻選擇性移除個別引 間與凹陷晶片接收 夕味彳U d 51、、泉 批、" 收£域間的網狀邵份之圖19的氣密緊密封 裝 < 橫截面圖示。 圖2 1疋根據本發明 口 已仗圖20的封裝切斷之兩接近晶片 、邯份具圖案的封裝件之橫截面圖示。 圖22a是根據本發明,圖⑴刀斷的封裝件之一的上視圖, 表不晶片與引線連接晶片端點刺線的終 連接到下-階層的構裝。 要耆 、圖22b是根據本發明,覆晶與連接到表示—引線的兩端點 C接之下階層構裝間區域的放大橫截面圖示。 安圖23疋根據本發明,總結形成支撐—覆晶的一部份具圖 木的封裝件之各種製程步驟的流程圖。 圖24a及24b疋根據本發明,表示已被切斷之兩接近晶片 85098 -30- 200405480 尺寸部份具圖案的封裝件之橫截面圖示與下視圖,及接著 提供具球柵陣列連接點來連接到下一階層的構裝以形成一 ELGA型式的封裝。 圖25a及25b是根據本發明,表示本發明的另一具體實施 例,其中圖24a及24b的封裝件個別地以鋁線超音波接合, 及或者利用銅線球接合的技術。 【圖式代表符號說明】 100 金屬條 105 唇 . 107 不規則形狀空腔 110,1101 預電鍵的前面 111,,119' 類網狀部份 113 電氣接點 113! 引線部份 114' 下面 115 晶片焊塾 115! 晶片接收區域 117f 中間區域 130,135,139 網狀結構 130f (FC)覆晶 136 通道部份 138 方塊/窗形膜 140 晶片 145,135’ 端點 85098 31 200405480 145f 外部接點 150 樹脂 150f --^或一板 160 結合導線 170,140 丨 封膠 120 接點 120? 預電鍍表面 121 鋁線 123 可錫焊層 125 背面 1351 錫球 200,2001 引線框架 210 晶片黏著的中間步驟 210f FC放置 220 樹脂固化 220f FC晶片接合 230 打線接合 240,2301 封裝 25 0,3 3 0,43 0,240’背面形成圖案蝕刻 260 切斷 300 標準周圍型式封裝 305 晶片端點的周邊排列 310, 410 封裝件 320,420 成型材料 85098 200405480 405 端點的陣列型式排列 440 内引線 445 外引線 450 接地環外觀 460 陣列型式輸入/輸出的建構 -- 85098
Claims (1)
- 200405480 拾、申清專利範圍: 1 ·種卩彳77具圖案的引線框架,用來製造一電子封裝,包括: 一膜具有一上表面及一底表面; 〉膜/、有第區域從上表面邵份具圖案但不完全通到 底表面; 、d月旲具有第一區域沒從上表面部份具圖案,該第二區 域形成-晶片接收區域用來支撐一積體電路(ic)晶片及許 多用來提供電氣連接到該IC晶片之電氣引線;及 第一區域形成一 弟一區域° 網狀結構交連沒從上表面形成圖案的 2.:申請專利範圍第i項之部份具圖案的引線框架,其中該 膜包括銅及其銅合金。 Λ 3·:申請專利範圍第【項之部份具圖案的引線框架,其中該 膜具有一厚度大於或等於〇 〇5 mm。 人 4.如申請專利範圍第!項之部份具圖案的編匡架,其中該 上表面是裸露的銅用做覆晶黏著。 5·如申請專利範圍第丄項之部份具圖案的引線框架,其中該 上表面是預電鍍一可接合的材料。 Λ 6.二申請專利範圍第5項之部份具圖案的料框架,其中該 可接合的材料包括Ni/Pd/Au鑄錠或Ag。 7 ·如申凊專利範圍第1項之部份 、 | 1刀具圖案的引線框架,其中該 展表面是裸露的銅用做後纟奘 R ^ , 傻、、且衣包鍍或用做完成電鍍浸鍍。 •口申凊專利範圍第丨項之部 、 1 1刀具圖案的W線框架,其中該 辰表面是預電鍍一可錫焊的材料。 ^ 85098 200405480 申明專利|a圍第8項之部份具圖案的引線框架,其中該 可錫焊的材粗*、b T种包括Sn/Pb、無鉛焊錫、浸鍍錫、無電鍍鎳 或Au鑄鍵。 1 〇·如申叫專利範圍第1項之部份具圖案的引線框架,其中該 膜利用戳印部份形成圖案。 申叫專利範圍第1項之部份具圖案的引線框架,其中該 膜利用蝕刻部份形成圖案。 12.二口申請專利範圍項之部份具圖案的引線框架,其中該 Μ 區或具有粗键表面.或毛敲外表的内部垂直壁用來增進 一封膠的黏著。 13·一種形成部份具圖案的引線框架之方法,包括以下步驟: 形成一膜具有一上表面及一底表面; 從上表面部份形成膜圖案,但不完全通到在第一區域 之膜的底表面以形成一網狀結構,其交連沒從上表面形成 圖案的第二區域; 其中?茨第二區域具有一晶片接收區域用來支撐一積體 電路(1C)晶片及許多用來提供電氣連接到該Ic晶片之電氣 弓丨線。 ; 14.如申請專利範圍第13項的方法,其中該膜包括銅及並入 金。 /、口 1 5·如申請專利範圍第13項的方法,其中該膜具有一厚度等 於或大於0.05 mm 〇 16.如申請專利範圍第13項的方法,其中該部份形成圖案包 括移除約25%至90%的膜厚。 85098 200405480 17. 如申請專利範圍第13項的方法,進一步包括預電鍍膜上 表面的步驟,特別用在打線接合。 18. 如申請專利範圍第13項的方法,進一步包括預電鍍膜底 表面的步驟,特別用在打線接合。 19·如申請專利範圍第Π項的方法,進一步包括預電鍍膜上 表面及底表面的步驟。 2〇.如申請專利範圍第17項或第19,的方法,其中該上表面 的預電鍍包括使用一導線可接合的材料。 1 .、如申叫專利範圍第20項的方法,其中該導線可接合的材 料包括Ni/Pd/Au或Ag。 22. 如申請專利範圍第18項或第㈣的方法,其中該底表面 的預電鍍包括使用一可錫焊的材料。 23. 如申請專利範圍第22項的方法,其中該可踢焊的材料是 Sn/Pb、典鉛焊錫、浸鍍錫、無電鍍鎳或Au鑄錠。 24. 如中請專利範圍第13項的方法,其中該第—區域具有不 規則形狀曝露的垂直壁當與其他材料齊接時以形成互鎖表 面。 25.如申請專利範圍第13項…,其中該晶片接. 括電氣引線的終端部份以調整一覆晶的焊錫凸塊接合。 26·-種使用部份具圖案的引線框架形成許多電子封裝之 法’包括以下步驟: 提供一膜具有一上表面及一底表面; 從上表面部份形成膜圖案’但不完全通到在第一區 1的履表面’留下沒從上表面部份形成圖案的第二區 85098 200405480 ,…區域形成許多部份具圖案的引線框架,每 一個具有晶片接收區域用來支撐—積體電路⑽晶片及許 多電乱引線用來提供電氣連接到該ic晶片; 該第一區域形成一網狀社播 、 狀、、口構父連母一個引線框架的晶 片接收區域及電氣引線以及連 、、… 久埂接序多引線框架到在膜的通 道邰份中之其他引線框架; 提供許多晶片每一個且右令 〃有4多電氣端點用來黏著到對 應的引線框架,· 收區 域; 在母一晶片的至少一 間形成一電氣連接; 應用一封膠材料覆蓋引線框架與 該引線框架; 黏著每一晶片到一對應的引線框架上的晶片接 線之一 點與引線框架的電氣引 膜的通道部份而封裝 膜的第區域之底表面背向形成圖案以移除網狀結 構及膜的通道部份;及 以形成個別的 切斷忒曝露在膜的通道部份之封膠材料 晶片尺寸封裝件。 27. 如申請專利範圍第26項的方法,其中每—晶片是一 體晶片。 28. 如申請專利範圍第26项的方法,其中黏著晶片的步驟是 使用一環氧樹脂利用背面接合該晶片到-晶片焊墊以形成 蝕刻的引線框架封裝(ELP)而完成。 29. 如_請專利範圍第⑽的方法,其中形成至少—連接的 85098 -4- 200405480 步驟是使用打線接合技術完成。 3〇·如申請專利範圍第26項的方法,其中黏著該晶片的步驟 是利用連接晶片上的端點到延伸至晶片接收區域的電氣引 線之終端部份以形成一具有一覆晶的ELP(ELPF)而完成。 31.如申請專利範圍第26項的方法,其中形成電氣連接的步 驟是利用連接晶片上的端點到延伸至晶片接收區域的電氣 引線之終端部份而完成。 32·如申請專利範圍第26項的方法,其中該封膠材料是一樹 脂。 . 3 33·如申請專利範圍第26項的方法,其中每一引線框架進一 步包括具有曝露垂直壁的第一區域及該封膠材料與該曝露 垂直壁互鎖。 34.如申請專利範圍第%項的方法’其中每一封裝的底表 /成有包氣連接點用來連接電氣引線到下一階層的黏著 35·如申請專利範圍第26項的方法,其中許多引線框架放 一万塊/窗形圖案的矩陣中。 36.如申清專利範圍第%項的方法,纟中該封裝是晶片尺 封裝。 37· —種形成電子封裝 , 導線,包括以下步驟:法…子封裝具有超音波接 括部份蚀刻的引線框架,其中該引線框i 二利用通道部份彼此分離,並具有-底表面 二到=應的引線框架上之晶片接收區域; 母-片端點與對應的引線框架之電氣引線部份 85098 200405480 形成電氣連接; 超音波接合㈣到該料㈣之底表面; 使用封胗材料覆蓋引線框架及分離該引線框架之通 道部份來封裝該引線框架; 背面形成底表面圖案以移除網狀部份及通道部份;以 及 切斷舖蓋通道部份的封膠材料以形成具有導線在底表 面上之個別晶片尺寸封裝。 其中該引線框架包括_ 其中該引線框架利用霍$ 其中該銅膜具有〜厚度 其中6亥晶片包括一'半導 其中黏奢·晶片是使用〜 3 8 ·如申凊專利範圍第3 γ項的方法 銅膜或銅合金。 39·如申請專利範圍第37項的方法 印或鑄造形成。 40·如申請專利範圍第38項的方法 大於或等於〇.〇5 mm。 41·如申請專利範圍第37項的方法 體裝置。 42·如申請專利範圍第37項的方法 環氧樹脂利用背面接合該晶片到晶片接收區域而完成。 43.如申請專利範圍第37項的方法,其中黏著晶片是 霄利用背面接合該晶片到晶片接收區域而完成。 - 从如申請專利範圍第37項的方法,其中形成電氣連 用打線接合技術完成。 X七 45.如申請專利範圍第37項的 ffl r θ ^ W其中形成電氣連接是^ 用連接晶片上的端點到延伸至曰&戸 k 1甲土日曰片£域的電氣引線之钦f 85098 200405480 部份來完成。 46. 如申請專利範圍第37項的方法,其中超音波接合的導線 包括鋁線。 47. 如申請專利範圍第37項的方法,其中該封膠材料是一樹 脂。 48. 如申請專利範圍第37項的方法,其中該背面圖案形成是 利用蝕刻來完成。 49. 如申請專利範圍第37項的方法,其中該切斷是利用分割 該封膠來完成。 · 85098
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US5656550A (en) * | 1994-08-24 | 1997-08-12 | Fujitsu Limited | Method of producing a semicondutor device having a lead portion with outer connecting terminal |
US5847458A (en) * | 1996-05-21 | 1998-12-08 | Shinko Electric Industries Co., Ltd. | Semiconductor package and device having heads coupled with insulating material |
JPH11195742A (ja) * | 1998-01-05 | 1999-07-21 | Matsushita Electron Corp | 半導体装置及びその製造方法とそれに用いるリードフレーム |
JP3436159B2 (ja) * | 1998-11-11 | 2003-08-11 | 松下電器産業株式会社 | 樹脂封止型半導体装置の製造方法 |
US6238952B1 (en) * | 2000-02-29 | 2001-05-29 | Advanced Semiconductor Engineering, Inc. | Low-pin-count chip package and manufacturing method thereof |
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2003
- 2003-04-28 WO PCT/US2003/013046 patent/WO2003103038A1/en active Application Filing
- 2003-04-28 EP EP03733901A patent/EP1500130A1/en not_active Withdrawn
- 2003-04-28 KR KR1020047017388A patent/KR100789348B1/ko not_active IP Right Cessation
- 2003-04-28 CN CNB038093588A patent/CN100380614C/zh not_active Expired - Fee Related
- 2003-04-28 JP JP2004510023A patent/JP2005531137A/ja active Pending
- 2003-04-28 AU AU2003239183A patent/AU2003239183A1/en not_active Abandoned
- 2003-04-29 TW TW92110007A patent/TWI239054B/zh not_active IP Right Cessation
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CN100380614C (zh) | 2008-04-09 |
WO2003103038A1 (en) | 2003-12-11 |
JP2005531137A (ja) | 2005-10-13 |
EP1500130A1 (en) | 2005-01-26 |
KR20050007350A (ko) | 2005-01-17 |
AU2003239183A1 (en) | 2003-12-19 |
TWI239054B (en) | 2005-09-01 |
KR100789348B1 (ko) | 2007-12-28 |
CN1650410A (zh) | 2005-08-03 |
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