TW523885B - Manufacturing method of electric device - Google Patents

Manufacturing method of electric device Download PDF

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Publication number
TW523885B
TW523885B TW091102771A TW91102771A TW523885B TW 523885 B TW523885 B TW 523885B TW 091102771 A TW091102771 A TW 091102771A TW 91102771 A TW91102771 A TW 91102771A TW 523885 B TW523885 B TW 523885B
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TW
Taiwan
Prior art keywords
adhesive
temperature
semiconductor wafer
manufacturing
electrical device
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Application number
TW091102771A
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English (en)
Inventor
Hiroyuki Kumakura
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Sony Chemicals Corp
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Publication of TW523885B publication Critical patent/TW523885B/zh

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    • H01L24/81Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
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    • 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
    • H01L21/50Assembly 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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    • H01L21/56Encapsulations, e.g. encapsulation layers, coatings
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Description

A7 523885 五、發明說明(丨) [技術領域] 本發明係關於一種接著劑’尤其是關於一種將半導體 晶片連接到基板上之技術。 [背景技術] 以往以來,爲了將半導體晶片接著於可撓性配線板般 之基板上,係使用著熱固性之接著劑。圖9之符號101係 半導體晶片111藉由接著劑Π2貼附到基板113所成之電 氣裝置。 基板113與半導體晶片111對向之面配置有金屬配線 122。又,半導體晶片111與基板113對向之面配置有凸塊 狀之端子121,該等之端子121係與對向之基板113的金 屬配線122相抵接著。 由於半導體晶片111之端子121係與未予圖示之內部 電路連接,在圖9所示之狀態下,半導體晶片111之內部 電路與基板113之金屬配線122係透過端子121做電氣連 接。又接著劑Π2係受熱硬化,半導體晶片111與基板 Π3亦透過此接著劑II2做機械性連接。只要使用此種接 著劑II2,即使未使用焊料仍可將半導體晶片111與基板 113做連接。
習知技術之接著製程中,於基板113表面塗佈或貼附 常溫之接著劑112之後,使用已加熱之抵壓頭將半導體晶 片111壓貼(加熱抵壓)於接著劑U2進行接著,惟對基板 Π3塗佈或貼附接著劑112之時、或是將半導體晶片1U ----- 3 本紙張尺度適用中國國家標準(CNS)A4規格---- ---------------- (請先閱讀背面之注意事項再填寫本頁) 訂_ - 線 A7 523885 ______B7____ 五、發明說明(/ ) 壓抵於接著劑112之際空氣會混入,而有在基板113與接 著劑112之間或半導體晶片111之端子121間發生空洞(氣 泡)130之情事。當接著劑112中存在著空洞130之情況, 於熔焊處理等將電氣裝置加熱之際,有半導體晶片Π1剝 離,導通不良之情況發生。 降低接著劑112之塗佈時的黏度,則基板113或半導 體晶片Π1與接著劑112之潤濕性會變高,所以塗佈之際 空氣的混入量會變少,惟一旦混入之空氣於加熱抵壓之際 難以去除。 另一方面,當黏度高的情況,相對於塗佈時空氣容易 混入之反面,所混入之空氣於加熱抵壓之際可被輕易地去 除,惟有出現端子間連接不良的問題。 做爲減少空洞之技術,如日本專利特開平5-144873號 公報所揭示般,使用抵壓頭將半導體晶片111壓抵於常溫 之接著劑112之後,讓抵壓頭做階段式或連續式之緩緩升 溫來加熱接著劑112。依據此種方法,藉由讓接著劑112 緩緩地升溫,可避免空洞130之發生。惟上述方法係進行 同一抵壓頭之溫度調整,所以無法連續性地處理複數之半 導體晶片111造成工作時間變長,生產性降低。 另一方面,做爲縮短工作時間之技術,已知有在將半 導體晶片111搭載於接著劑112之對準製程(預壓接製程) 、將半導體晶片111加熱抵壓之接著製程(正式壓接製程) 分別使用不同之抵壓頭,在對準製程不加熱來進行對位, 在接著製程則是進行一次之加熱的方法。依據此種方法, ___ 4 I紙張尺度適用中國g標準(CNS)A4規格(21Q x 297公^^ " (請先閱讀背面之注意事項再填寫本頁) 裝 A7 523885 五、發明說明(;)) 雖可提升生產性,但易於發生空洞130。不論是何種方式 ,要高效率地生產可靠性高之電氣裝置101是困難的。 本發明係爲了解決上述習知技術之不佳情形所得之創 作,其目的在於提供一種在接著劑中無空洞之可靠性高的 電氣裝置。 [發明之揭示] 爲了解決上述課題,本發明係一種電氣裝置製造方法 ,係具有:讓基板之連接端子與半導體晶片之連接端子以 彼此對向的方式做對位,將該半導體晶片抵接於該基板上 所配置之接著劑,然後一邊抵壓該半導體晶片一邊加熱, 使得該連接端子彼此做接觸之接著製程;其中,該接著製 程係具有:在該接著劑被加熱到第一溫度之狀態下將該半 導體晶片抵接於該接著劑之預壓接製程;以及,一邊抵壓 該半導體晶片、一邊將該接著劑加熱到較該第一溫度爲更 高溫度之第二溫度之正式壓接製程。 本發明係一種電氣裝置製造方法,其中,該第一溫度 係該接著劑之反應開始溫度以上,且未滿該接著劑之反應 尖峰溫度。 本發明係一種電氣裝置製造方法,其中,該第二溫度 係該接著劑之反應尖峰溫度以上。 本發明係一種電氣裝置製造方法,其中,該預壓接製 程,係將該基板配置到第一載置台上,將該第一載置台加 熱到該第一溫度。 __5 本紙張尺度刺巾關家標準(CNS)A4規格(210 χ 297公爱) 一 (請先閱讀背面之注意事項再填寫本頁) 裝 I], 參 523885 A7 ^_ B7 五、發明說明(4:) ---------------- (請先閱讀背面之注意事項再填寫本頁) 本發明係一種電氣裝置製造方法,其中,該預壓接製 程,係於進行該對位之後,將該半導體晶片抵接於該接著 劑。 本發明係一種電氣裝置製造方法,其中,該預壓接製 程,係該半導體晶片抵接於該接著劑之際,讓該半導體晶 片抵壓至該對向之連接端子彼此不致互相接觸的程度。 本發明係一種電氣裝置製造方法,其中,該正式壓接 製程,係將該基板移載到不同於該第一載置台的第二載置 台上來進行。 本發明係一種電氣裝置製造方法,其中,該正式壓接 製程,係將可加熱之抵壓頭加熱到該第二溫度,然後將該 抵壓頭抵接於該半導體晶片。 -線 本發明係一種電氣裝置製造方法,其中,該正式壓接 製程,係讓該對向之連接端子彼此接觸之後,將該接著劑 加熱到該第二溫度。 又,所謂的接著劑之反應開始溫度,係進行接著劑之 差示掃描熱分析之情況所得之DSC(Differential Scanning Calorimetry)曲線自基線往發熱方向上揚時之溫度’所旨胃的 接著劑之反應尖峰溫度係該DSC曲線之發熱尖峰溫度。 本發明採用上述構成,於預壓接製程之際’將半導體 晶片抵接於接著劑之前將接著劑加熱到第一溫度’以該加 熱使得接著劑之黏度較塗佈時爲低,所以在將半導體晶片 抵接於接著劑之際,接著劑易於流入半導體晶片之連接端 子間,空氣難以進入當中。 _____ _ 6_____ 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) A7 523885 五、發明說明(< ) 在此狀態下,半導體晶片之連接端子並未抵接於基板 之連接端子,於連接端子之間殘留有多餘之接著劑。由於 第一溫度較接著劑之反應開始溫度爲高,所以將接著劑維 持在第一溫度的話,雖接著劑之硬化反應有在進行,惟第 一溫度低於接著劑之反應尖峰溫度,所以反應之進行速度 緩慢,接著劑之反應率停留在2%〜20%的範圍。 在該狀態下,接著劑之黏度雖較塗佈時爲高但不失其 流動性。是以,一旦在正式壓接製程進一步抵壓半導體晶 片,則殘留於半導體晶片之連接端子與基板之連接端子之 間的多餘接著劑會連同殘留之空洞被壓出,使得半導體晶 片之連接端子抵接於基板之連接端子。 在連接端子彼此呈接觸的狀態下,若將接著劑升溫到 第二溫度,則接著劑會完全硬化,使得半導體晶片與基板 同時做電氣性與機械性的連接。 由於只需在預壓接製程將第一載置台加熱,接著劑即 可被加熱到第一溫度,所以無須將對位用之保持機構加熱 ,可使用常溫之抵壓頭做爲保持機構。又,只要可進行對 位,亦可將該抵壓頭予以加熱。 [圖式之簡單說明] 第一圖(a)係用以說明本發明之電氣裝置之一例之製手呈 (1) 的截面圖。 · * 第一圖(b)係用以說明本發明之電氣裝置之一例之製程 (2) 的截面圖。 Ί ------------裝--- (請先閱讀背面之注意事項再填寫本頁) 一:0, · 線 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) A7 523885 _______B7 五、發明說明(b ) 第一圖(C)係用以說明本發明之電氣裝置之一例之製提 (3) 的截面圖。 第一圖(d)係用以說明本發明之電氣裝置之一例之製程 (4) 的截面圖。 第二圖(a)係用以說明本發明之電氣裝置之一例之製程 (5) 的截面圖。 第二圖(b)係用以說明本發明之電氣裝置之一例之製程 (6) 的截面圖。 第二圖(c)係用以說明本發明之電氣裝置之一例之製程 (7) 的截面圖。 桌二圖(a)係用以說明本發明之電氣裝置之其他例之製 程(1)的截面圖。 第三圖(b)係用以說明本發明之電氣裝置之其他例之製 程(2)的截面圖。 第三圖(c)係用以說明本發明之電氣裝置之其他例之製 程(3)的截面圖。 第四圖係顯示第一例之接著劑的DSC曲線之圖。 第五圖係顯示第一例之接著劑之溫度黏度曲線之圖。 第六圖係顯示第二例之接著劑之溫度黏度曲線之圖。 第七圖係顯示第三例之接著劑之溫度黏度曲線之圖。 第八圖係用以說明本發明之電氣裝置之其他例的截面 圖。 第九圖係用以說明習知技術之電氣裝置之圖。 各圖中,符號1、2係表示電氣裝置。符號12、15係 ____ 8 本紙張尺國國家標準(CNS)A4規格(21〇 x 297公--- (請先閱讀背面之注意事項再填寫本頁) !·裝 訂 •線 A7 523885 _____B7____— 一 五、發明說明(Y ) 分別表示接著劑。符號π係表示半導體晶片。符號13係 表示基板(可撓性配線板)。符號21係表示半導體晶片之連 接端子(凸塊)。符號22係表示基板之連接端子。符號50 係表示第一載置台(預壓接平台)。符號70係表示第二載置 台(正式壓接平台)。符號60係表示抵壓頭(正式壓接頭)。 [用以實施發明之最佳形態] 說明本發明之實施形態。 首先將熱固性樹脂之環氧樹脂、微膠囊化之硬化劑所 構成之潛在性硬化劑、導電性粒子做混合,製作後述之表 1的ACP、ACF、NCP攔所示組成之接著劑。在此狀態下 接著劑係呈糊狀。 圖1(a)之符號13係顯示可撓性配線板(基板)。此可撓 性配線板13之表面係配置有金屬配線,由金屬配線的一部 分構成複數個連接端子22。該等之連接端子22係分別露 出於可撓性配線板13之表面,分別配置於與後述半導體晶 片之凸塊相對應之處。若於搭載後述之半導體晶片的位置 塗佈接著劑12,則可撓性配線板13之連接端子22乃由接 著劑12所被覆(圖1(b))。 圖1(c)之符號50係顯示預壓接平台(第一載置台)。於 預壓接平台50之表面附近係配置有陶瓷加熱器51。預壓 接平台50係藉由陶瓷加熱器51被事先加熱到至少接著劑 12之反應開始溫度以上,讓可撓性配線板13之未配置連 接端子22之面朝下,然後載置於預壓接平台50之表面, __ 9 , ^紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ' " " ' (請先閱讀背面之注意事項再填寫本頁) 裝 .線 523885 A7 __ B7 五、發明說明(2 ) (請先閱讀背面之注意事項再填寫本頁) 則可撓性配線板13與接著劑12會因熱傳導而被加熱到反 應開始溫度以上。在此狀態下調整陶瓷加熱器51之通電量 ,讓接著劑12成爲反應開始溫度以上反應最高溫度以下之 溫度(第一溫度)。 此時,接著劑12因受到加熱造成其黏度下降,接著劑 12對於可撓性配線板13之潤濕性獲得提升,所以在塗佈 接著劑12之際所混入之氣泡(空洞)乃消失。 圖1(d)之符號11係顯示半導體晶片。於半導體晶片 11之一面配置有複數個凸塊21(連接端子),該等之凸塊21 係與半導體晶片11之未予圖示之內部電路做電氣連接。 圖1(d)之符號40係顯示保持機構,如圖1(d)所示般, 令半導體晶片Π之配置有凸塊21之側的面朝下之狀態下 ,藉由保持機構40來保持半導體晶片11,使得半導體晶 片11位於可撓性配線板13之上方之狀態下,讓半導體晶 片11之凸塊21與可撓性配線板13之連接端子22相互對 向進行對位之後,讓保持機構40下降,使得半導體晶片 11載置於可撓性配線板13上之接著劑12。 當以半導體晶片11之凸塊21未抵接於可撓性配線板 13之連接端子22的程度來抵壓半導體晶片11,則接著劑 12會自凸塊21前端表面被壓退,接著劑12會流入鄰接之 凸塊21間的空隙。此時,由於接著劑12之黏度因加熱而 變得較塗佈時爲低,接著劑12於流入凸塊21間之際不會 發生空洞。 圖2(a)係顯示該狀態,於半導體晶片11之凸塊21之、 10 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) A7 523885 __ B7_____ 五、發明說明(丨) ----------------- (請先閱讀背面之注意事項再填寫本頁) 間沒有空洞,接著劑12被塡充其間。又,相互對向之凸塊 21與連接端子22之間殘留多餘的接著劑12,凸塊21與連 接端子22並未做電氣連接。又,藉由預壓接平台50之陶 瓷加熱器51,接著劑12之溫度被維持在第一溫度。 藉由將接著劑12維持在第一溫度,潛在性硬化劑之微 膠囊有一部分會熔解,接著劑之硬化反應乃緩慢地進行。 在接著劑12之反應率達2%〜20%之範圍時,在半導體晶片 11載置於接著劑12之狀態下使得保持機構40自上方退開 ,讓可撓性配線板13連同接著劑12、半導體晶片11 一同 自預壓接平台50移載到正式壓接平台70(第二載置台)上( 圖 2(b))。 -線 於正式壓接平台70之上方係配置有正式壓接頭(抵壓 頭)60。於正式壓接頭60中內藏有加熱器61,正式壓接頭 60係事先被加熱到至少超過接著劑12之反應最高溫度的 溫度。 於圖2(b)所示之狀態下,接著劑12之黏度較塗佈時爲 高惟流動性並未喪失。 是以,將正式壓接頭60壓抵於接著劑12上之半導體 晶片Π,一邊加熱正式壓接頭60 —邊施加既定之荷重, 則多餘之接著劑12會連同殘留之空洞自凸塊21與連接端 子22之間被壓出,於接著劑12被加熱到反應最高溫度以 上之前使得凸塊21抵接於連接端子22。 在前述狀態下進一步持續加熱抵壓,則當接著劑12因 熱傳導而被加熱到反應最高溫度以上(第二溫度),則接著 一 11 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 523885 A7 ____B7_____ 五、發明說明((〇 ) 劑12中之潛在性硬化劑會完全熔解使得接著劑之熱硬化反 應急速地進行,在凸塊21抵接於連接端子22之狀態下讓 接著劑12成爲完全硬化。 圖2(c)係顯示接著劑12完全硬化之狀態下的電氣裝置 1。在此電氣裝置1中,可撓性配線板13與半導體晶片11 不僅透過已硬化之接著劑12做機械性的連接,且同時透過 凸塊21做電氣連接。 以上雖就使用糊狀之接著劑12的情況做說明,惟本發 明並不侷限於此。例如,本發明所使用之接著劑亦包含經 半硬化成爲展現自支持性程度之薄膜狀物、以及添加固形 樹脂做成薄膜狀之物。 圖3(a)之符號15係顯示上述薄膜狀之接著劑之一例。 如圖3(b)所示般,將薄膜狀之接著劑15貼附於可撓性配線 板13之配置有連接端子22之側的面上之後,以與圖1(c)〜 圖2(c)所示之製程爲相同的條件分別進行預壓接製程以及 正式壓接製程,則可得到圖3(c)所示之電氣裝置2。 (實施例) 將下述表1所示之環氧樹脂、潛在性硬化劑、導電性 粒子分別以下述表1所示之比例來混合,分別製作出:含 有導電性粒子之糊狀接著劑(ACP : Anisotropic Conductive Paste)、含有導電性粒子之薄膜狀接著劑(ACF : Anisotropic Conductive Film)、以及不含導電性粒子之糊狀 接著劑(NCP : Non Conductive Paste)。 _12_____ 本紙張尺度適用中國國家標準(CNS)A4規格(210 χ 297公釐) ------------^裝—— (請先閱讀背面之注意事項再填寫本頁) 訂-· -線· 523885 A7 ----_____B7 五、發明說明(Π ) _ 1 :接著劑之組成與配合 接著劑 '—-- 糸且成 商品名 製造公司 配合 (重量份) A C P ----- 潛在性硬化劑 HX-3722 旭成化環氧 (股份有限) 50 熱固性樹脂 雙酚A型 環氧 EP828 日本環氧樹脂 (股份有限) 20 萘型環氧 HP4032D 大曰本油墨化學工 業(股份有限) 30 導電性粒子 金屬被膜樹脂粒子(平均粒徑5以m) 15 A C F 潛在性硬化劑 HX-3941HP 旭成化環氧 (股份有限) 40 熱固性樹脂 苯氧樹脂 YP50 東都化成(股份有 限) 25 雙酚A型 環氧 EP828 曰本環氧樹脂 (股份有限) 35 導電性粒子 金屬被膜樹脂粒子(平均粒徑5 // m) 15 JN c P —— 潛在性硬化劑 HX-3088 旭成化環氧 (股份有限) 60 熱固性樹脂 雙酚F型環 氧 EP807 曰本環氧樹脂 (股份有限) 25 萘型環氧 HP4032D 大日本油墨化學工 業(股份有限) 15 (請先閱讀背面之注意事項再填寫本頁) 裝 ·. 丨線 *上述表1中ACP係表示含有導電性粒子之糊狀接著 劑’ ACF係表示含有導電性粒子之薄膜狀接著劑,nCP係 表$不含導電性粒子之糊狀接著劑。 、 上述表1中之金屬被膜樹脂粒子係於樹脂粒子表面开多 成鍍鎳層,進一步在該表面形成鍍金層所成者。 ^氏張尺國家標準(CNS)A4規格(210 X 297公釐) "一 --- A7 523885 __ _JB7__ 五、發明說明( ----------------- (請先閱讀背面之注意事項再填寫本頁) 其次,針對上述3種類之接著劑當中之ACP使用差示 掃描熱分析計(精工電子工業(股份有限)公司製造之商品名 「DSC200」),以l〇°C/分鐘的升溫速度自30°C〜25CTC做升 溫來進行差示掃描熱分析。所得之DSC曲線係示於圖4。 圖4之橫軸係表示溫度(°C),縱軸係表示熱流(mW), 圖4之符號D係表示DSC曲線,又同圖中之符號B係表 示基線(空白)。 圖4之符號S係表示DSC曲線D自基線B開始上揚 之點(反應開始點),符號P係表示DSC曲線之發熱峰之位 置(反應尖峰點),反應開始點S位於70°C,反應尖峰點P 位於115.2°C。此DSC曲線D之發熱峰由於係依據ACP之 熱硬化反應,所以將ACP加熱的情形下,發現ACP之硬 化反應開始溫度爲70°C(反應開始溫度),硬化反應達尖峰 之溫度(反應尖峰溫度)爲約H5°C。又,在高於反應尖峰溫 度的溫度下,發熱量會急驟地降低,可知硬化反應大致已 經結束。又,此時之發熱量在每ACP lmg爲442.9mJ。 再者,使用黏度計(HAAKE公司製造之商品名「雷歐 美達RS75」),將ACP自20°C以升溫速度l〇°C/分鐘升溫 到200°C測定其黏度變化(黏度測定)。圖5係顯示由該測定 結果所得之曲線,圖5之橫軸係表示溫度(°C),縱軸係表 示黏度(mPa · s)。 圖5之符號Si係表示與圖4之反應開始點對應之溫度 (反應開始溫度),圖5之符號Pi係表示與圖4之反應尖峰 點對應之溫度(反應尖峰溫度)。由圖5所示之溫度黏度曲 ____14 _ 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 523885 A7 ___B7___ 五、發明說明(0 ) (請先閱讀背面之注意事項再填寫本頁) 線可看出,將接著劑加熱時之黏度,以反應開始溫度Si 以上到反應尖峰溫度P!以下之範圍爲最低。又,在反應尖 峰溫度Pi以上由於接著劑之硬化反應已相當程度進行,接 著劑之黏度乃急速地增高。 又,針對ACF與NCP分別測定自20°c升溫到200°c 之黏度變化。圖6中係記載ACF之溫度黏度曲線L2,圖7 中係記載NCP之溫度黏度曲線L3。再者,使用ACF與 NCP進行差示掃描熱分析。由差示掃描熱分析所得之ACF 之反應開始溫度S2與反應尖峰溫度P2係記載於圖6中, NCP之反應開始溫度33與反應尖峰溫度P3係記載於圖7 中。 由圖6、7可明顯看出,即便是將接著劑做成薄膜狀之 情況(ACF)或是不含導電性粒子之情況(NCP),溫度黏度曲 線L2、L3之黏度最低的溫度仍在反應開始溫度s2、S3〜反 應尖峰溫度P2、P3之範圍。由這些結果可知,當接著劑爲 熱固性之情況下,不管其種類爲何,黏度最低的溫度均在 反應開始溫度〜反應尖峰溫度之範圍,而在反應尖峰溫度以 上接著劑之硬化反應會急速地進行。 其次,將上述3種類之接著劑(ACP、ACF、NCP)分別 塗佈或貼附於可撓性配線板13後,將可撓性配線板13載 置於預壓接平台50 ’接著對預壓接平台50進行加熱,使 得各接著劑12之溫度升溫到下述表2之「第一溫度」欄所 不之溫度。其次’以圖2(a)〜圖2(c)之製程進行正式壓接, 製作實施例1〜7、比較例1〜7之電氣裝置1。 ____ 15 _ 本紙張尺度酬家標準(CNS)A4規格(21Q x 297公爱) ---- 523885 A7 ____B7 五、發明說明(/4) 表2 :接著劑之反應開始溫度、反應尖峰溫度與各評價試 驗結果 接著劑 第一溫 度 反應率 (%) 空洞外 觀 初期導 通 老化後 導通 種類 反應開 始溫度 反應尖 峰溫度 實施例1 A 70°C 115°C 70°C 3.2 〇 〇 〇 實施例2 C 90°C 9.7 〇 〇 〇 實施例3 P 110°C 17.0 〇 〇 〇 比較例1 — 0 X 〇 X 比較例2 60°C 1.5 X 〇 X 比較例3 120°C 24.1 〇 X — 實施例4 A 80°C 120°C 90°C 7.4 〇 〇 〇 實施例5 C 110°C 14.8 〇 〇 〇 比較例4 F 70°C 1.3 X 〇 X 比較例5 130°C 21.6 〇 X — 實施例6 N 90°C 140°C 90°C 5.2 〇 〇 〇 實施例7 C 120°C 16.4 〇 〇 〇 比較例6 P 80°C 1.1 X 〇 X 比較例7 150°C 26.0 〇 X 一 (請先閱讀背面之注意事項再填寫本頁) 此處做爲可撓性配線板13係使用在厚度20/zm之聚 醯亞胺薄膜的表面配置有厚度12/zm之金屬配線(鎳一金 鍍敷銅配線)所成者,做爲半導體晶片11係使用在6mm四 方之正方形形狀、厚度〇.4mm之晶片表面配置有鍍金凸塊 (60//m四方之正方形形狀、高度20/zm)所成者。又,在 正式壓接製程所加熱之接著劑12之溫度(第二溫度)係230 °C,在正式壓接製程所施加之荷重在每凸塊21爲0.6N。 16 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 523885 A7 _______B7___ 五、發明說明(<) 使用該等實施例1〜7、比較例1〜7之電氣裝置1,分 別進行下述「反應率」、「空洞外觀」、「初期導通」、 「老化後導通」之各評價試驗。 [反應率]於製造實施例1〜7、比較例1〜7之電氣裝置i 之製程中,使用預壓接製程後之接著劑12當作試料,針對 各試料以與上述差示掃描熱分析爲相同之方法進行差示掃 描熱分析,分別求出接著劑之反應率。 其中,將加熱前(塗佈前)之接著劑分別當作標準試料 來使用。針對標準試料進行差示掃描熱分析的情況所測定 之試料每lmg之發熱量若定爲Αι,針對試料(預壓接後之 接著劑)進行差示掃描熱分析的情況所測定之試料每lmg 之發熱量若定爲A2,以下述式(1)所得之値係定爲反應率 R%。 R (%) = (1- A2/ A〇 x 100·····式(1) 各反應率係記載於上述表2。 [空洞外觀]針對實施例1〜7、比較例1〜7之電氣裝置1 ,以金屬顯微鏡來觀察可撓性配線板13之配置有半導體晶 片11之側的相反側之面,確認凸塊21抵接於連接端子22 之部分之連接部的周圍是否有空洞。 此時,將並未觀察到較凸塊21爲大之空涧的情況評價 爲「〇」,將觀察到較凸塊21爲大之空洞的情況評價爲「 X」。該等之評價結果係記載於上述表2中。 [初期導通]針對實施例1〜7、比較例1〜7之電氣裝置 1,測定個別抵接有凸塊21之兩個連接端子22之間的導通 17 ______ 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閱讀背面之注意事項再填寫本頁) 裝 訂· 線· A7 523885 ____B7_ 五、發明說明(斗) --------------裝--- (請先閱讀背面之注意事項再填寫本頁) 電阻値。導通電阻値未滿100ΐηΩ的情況評價爲「〇」’超 過ΙΟΟιηΩ的情況評價爲「X」,該等之評價結果係記載於 上述表2中。 [老化後導通]針對實施例1〜7、比較例1〜7之電氣裝 置1,放置於相對濕度100%之高溫高濕條件下100小時( 老化)後,以與上述「初期導通」同樣的方法來測定導通電 阻値。導通電阻値未滿5〇〇πιΩ的情況評價爲「〇」’超過 500ιηΩ的情況評價爲「X」,該等之評價結果係記載於上 述表2中。 由上述表2可明顯地看出,預壓接前之接著劑的加熱 溫度(第一溫度)爲反應開始溫度〜反應尖峰溫度的實施例 1〜7之電氣裝置1在各評價試驗中均得到優異之結果。 .線- 另一方面,於預壓接前並未加熱之比較例1的電氣裝 置、第一溫度較各接著劑之反應開始溫度爲低之比較例2 、4、6,由於預壓接前接著劑之黏度相當的低,所以在連 接部周圍之接著劑存在多數空洞,其結果,老化後之導通 結果變差。 又,預壓接前之溫度較各接著劑之反應尖峰溫度爲高 之比較例3、5、7其接著劑中雖未觀察到大的空洞,惟正 式壓接前之接著劑的黏度變得過高,接著劑無法充分的壓 退,所以在連接端子與凸塊之間無法取得充分的導通,在 老化前之初期導通的階段出現導通不良。 以上雖針對預壓接製程與正式壓接製程各於不同之平 台上進行的情況做說明,惟本發明並不侷限於此,亦可在 ___18___ 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) A7 523885 ____B7_______ 五、發明說明(7 ) ------------Μ裝—— (請先閱讀背面之注意事項再填寫本頁) 同一平台上進行預壓接、正式壓接之製程。又,亦可在預 壓接平台上進行將接著劑塗佈到基板之製程。 又,以上雖說明讓預壓接平台50升溫而將接著劑12 加熱到第一溫度之情況,惟本發明並不侷限於此’亦可使 用各種之加熱機構。例如,可於保持機構40內藏加熱機構 ,或是於加熱爐內進行預壓接製程,以將接著劑12加熱到 第一溫度。 又,只要在正式壓接平台內藏加熱機構,藉由加熱機 構來將正式壓接平台做事先加熱,則將可撓性配線板13自 預壓接平台50移載至正式壓接平台之時接著劑12之溫度 不致降低,所以正式壓接製程所需時間可更加縮短。此時 ,正式壓接平台之溫度以未滿第二溫度、又以接近第一溫 度左右爲佳。 丨線 以上雖說明了對半導體晶片11與可撓性配線板13之 連接情況,惟本發明並不侷限於此,可使用於各種之電氣 裝置的製造。例如,不僅適用於可撓性配線板,亦可適用 於硬性基板,將硬性基板與半導體晶片做連接來‘製作 C〇B(Chip on Board) 〇 又,亦可使用在 TCP(Tape Cairier Package)與 LCD(Liquid Crystal Display)的連接上。 圖8之符號80係顯示電氣裝置,電氣裝置80具有 TCP 83與LCD 81。圖8之符號84係顯示以TCP 83之配 線的一部分所構成之連接端子,圖8之符號82係顯示以 LCD 81之電極的一部分所構成之連接端子。 _ 19 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 523885 A7 _____B7____ 五、發明說明(丨9 ) TCP 83與LCD 81係以與上述圖1(a)〜圖1(d)、圖 2(a)〜圖2(c)爲相同的製程來連接,連接端子82、84係以 相互接觸的狀態藉由接著劑85來固定。 做爲本發明所能使用之熱固性樹脂,可使用環氧樹脂 、尿素樹脂' 三聚氰胺樹脂、酚醛樹脂等之各種樹脂,其 中考慮到硬化速度與熱硬化後之接著劑強度等,以使用環 氧樹脂爲佳。 使用環氧樹脂做爲熱固性樹脂的情況下,以倂用硬化 劑爲佳。做爲硬化劑可使用咪唑系硬化劑、聚胺硬化劑、 酚醛類、異氰酸酯類、聚硫醇類、酸酐硬化劑等各種物質 。該等硬化劑亦可微膠囊化而當作潛在性硬化劑來使用。 又,亦可於接著劑添加熱塑性樹脂。做爲熱塑性樹脂 可使用苯氧樹脂、聚酯樹脂等之各種物質。 於本發明所使用之接著劑中亦可添加消泡劑、著色劑 、防老化劑、塡料、偶合劑等之各種添加劑。 [產業上之可利用性] 將半導體晶片抵接於基板上之接著劑做預壓接之際, 接著劑中不會出現空洞。又,即使於預壓接後殘留空洞的 情況下,由於正式壓接時接著劑之黏度會變高,所以藉由 抵壓可將接著劑中之空洞壓出。是以,依據本發明,可得 到一種在接著劑中無空洞、且導通可靠性高的電氣裝置。 ____20 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) --------------裝--- (請先閱讀背面之注意事項再填寫本頁) 1^·- -線. 523885 A7 ___B7 五、發明說明((/ ) [符號說明] 1,2,80,101 電氣裝置 11,111 半導體晶片 12,85,112 接著劑 13 可撓性配線板 15 接著劑塗佈層 21 凸塊 22,82,84 連接端子 40 保持機構 50 預壓接平台 51 陶瓷加熱器 60 正式壓接頭 61 配線基板本體 70 正式壓接平台 81 LCD 83 TCP 113 基板 121 端子 122 金屬配線 130 空洞 (請先閱讀背面之注意事項再填寫本頁) 21 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐)

Claims (1)

  1. 523885 C8 D8 六、申請專利範圍 1·一種電氣裝置製造方法,係具有:讓基板之連接端 子與半導體晶片之連接端子以彼此對向的方式做對位,將 該半導體晶片抵接於該基板上所配置之接著劑,然後一邊 抵壓該半導體晶片一邊加熱,使得該連接端子彼此做接觸 之接著製程;其中 該接著製程係具有: 在該接著劑被加熱到第一溫度之狀態下將該半導體晶 片抵接於該接著劑之預壓接製程;以及 一邊抵壓該半導體晶片、一邊將該接著劑加熱到較該 第一溫度爲更高溫度之第二溫度之正式壓接製程。 2.如申請專利範圍第1項之電氣裝置製造方法,其Ψ ,該第一溫度係該接著劑之反應開始溫度以上,且未滿該 接著劑之反應尖峰溫度。 3·如申請專利範圍第1項之電氣裝置製造方法, ,該第二溫度係該接著劑之反應尖峰溫度以上。 4·如申請專利範圍第1項之電氣裝置製造方法,其中 ,該預壓接製程,係將該基板配置到第一載置台上,將該 第一載置台加熱到該第一溫度。 5·如申請專利範圍第2項之電氣裝置製造方法,其中 ,該預壓接製程,係將該基板配置到第一載置台上,將該 第一載置台加熱到該第一溫度。 6·如申請專利範圍第.1項之電氣裝置製造方法,其中 ,該預壓接製程,係於進行該對位之後,將該半導體曰 抵接於該接侧。 & 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閱讀背面之注意事項再塡寫本頁}
    523885 A8B8C8D8 六、申請專利範圍 7·如申請專利範圍第2項之電氣裝置製造方法,其中 ,該預壓接製程,係於進行該對位之後,將該半導體晶片 抵接於該接著劑。 8·如申請專利範圍第1項之電氣裝置製造方法,其中 ,該預壓接製程,係該半導體晶片抵接於該接著劑之際, 讓該半導體晶片抵壓至該對向之連接端子彼此不致互相接 觸的程度。 9·如申請專利範圍第2項之電氣裝置製造方法,其中 ,該預壓接製程,係該半導體晶片抵接於該接著劑之際, 讓該半導體晶片抵壓至該對向之連接端子彼此不致互相接 觸的程度。 10. 如申請專利範圍第1項之電氣裝置製造方法,其中 ,該正式壓接製程,係將該基板移載到不同於該第一載置 台的第二載置台上來進行。 11. 如申請專利範圍第3項之電氣裝置製造方法,其中 ,該正式壓接製程,係將該基板移載到不同於該第一載置 台的第二載置台上來進行。 12. 如申請專利範圍第1項之電氣裝置製造方法,其中 ,該正式壓接製程,係將可加熱之抵壓頭加熱到該第二溫 度,然後將該抵壓頭抵接於該半導體晶片。 13·如申請專利範圍第3項之電氣裝置製造方法,其中 ,該正式壓接製程,係將可加熱之抵壓頭加熱到該第二溫 度,然後將該抵壓頭抵接於該半導體晶片。 14.如申請專利範圍第1項之電氣裝置製造方法,其中 2 適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閲讀背面之注意事項再填寫本頁) :裝 、1T: 線 523885 A8 B8 C8 D8 六、申請專利範圍 ,該正式壓接製程,係讓該對向之連接端子彼此接觸之後 ,將該接著劑加熱到該第二溫度。 (請先閲讀背面之注意事項再填寫本頁) 15.如申請專利範圍第3項之電氣裝置製造方法,其中 ,該正式壓接製程,係讓該對向之連接端子彼此接觸之後 ,將該接著劑加熱到該第二溫度。 3 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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