TW200839903A - Method for manufacturing electrical connections in wafer - Google Patents

Method for manufacturing electrical connections in wafer Download PDF

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Publication number
TW200839903A
TW200839903A TW096109644A TW96109644A TW200839903A TW 200839903 A TW200839903 A TW 200839903A TW 096109644 A TW096109644 A TW 096109644A TW 96109644 A TW96109644 A TW 96109644A TW 200839903 A TW200839903 A TW 200839903A
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Taiwan
Prior art keywords
wafer
forming
openings
solder paste
conductive line
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Application number
TW096109644A
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English (en)
Inventor
Huseh-An Yang
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Advanced Semiconductor Eng
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Priority to TW096109644A priority Critical patent/TW200839903A/zh
Priority to US12/046,097 priority patent/US7681779B2/en
Publication of TW200839903A publication Critical patent/TW200839903A/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0016—Brazing of electronic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02—Bonding areas; Manufacturing methods related thereto
    • H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/0554—External layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02—Bonding areas; Manufacturing methods related thereto
    • H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/0554—External layer
    • H01L2224/05573—Single external layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10—Bump connectors; Manufacturing methods related thereto
    • H01L2224/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13—Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001—Core members of the bump connector
    • H01L2224/1302—Disposition
    • H01L2224/13025—Disposition the bump connector being disposed on a via connection of the semiconductor or solid-state body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10—Bump connectors; Manufacturing methods related thereto
    • H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/161—Disposition
    • H01L2224/16135—Disposition the bump connector connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
    • H01L2224/16145—Disposition the bump connector connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being stacked
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/02—Bonding areas ; Manufacturing methods related thereto
    • H01L24/03—Manufacturing methods
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/02—Bonding areas ; Manufacturing methods related thereto
    • H01L24/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L24/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Bonding (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Laser Beam Processing (AREA)

Description

200839903 九、發明說明： 【發明所屬之技術領域】 本發明係有關於-種於晶圓内形成 特別有關於一種利用壓力差^ + 忒路的方法，更 〜巾&刀產之方式，將暮 孔中以形成導電線路的方法。 ㈢婷入曰曰圓的開 【先前技術】 由於電子產品越來越輕薄短小， 4 使侍用以保護丰暮駚曰 片以及提供外部電路連接的封裝構 _曰曰 化。 傅&也冋樣需要輕薄短小 隨著微小化以及高運作速度需喪 i!而來的增加，多晶片封裝構 造在許多電子裝置越來越吸引人。 夕日日片封裝構造可藉由 將兩個或兩個以上之晶片組合在單_封裝構造中，來使系 統運作速度之限制最小化。此外，多晶片封裝構造可減少 晶片間連接線路之長度而降低訊號延遲以及存取時間。
參考第1圖，一種習知的堆疊封裝構造1〇〇包含一基板 110，基板110上設有一晶片12〇 ,藉由複數個凸塊14〇與 基板110電性連接。晶片120上堆疊有另一晶片13〇，並 藉由凸塊150與晶片120電性連接。 參考第2圖，為使晶片130能藉由位在下方的晶片i2〇 與基板110電性連接，晶片120的内部形成有連接主動面 122與背面124的通孔126，通孔126内並形成有導電體 128，其與位在主動面122與背面124上的凸塊140、150 電性連接，晶片130則藉由此導電通道與基板11〇電性連 接。 … 01225-TW/ASE 1889 5 200839903 一般來說，晶片上的開孔通常藉由蝕刻或雷射鑽孔的方 式形成，亚以電鍍之方式於該開孔内形成銅導體。惟，對 於同深寬比的開孔，必須以較好的電流密度來控制電鍍的 製程，否則無法達到較佳的電鍍結果。舉例而言，參考第 3 0田以电鑛之方式於晶片300的開孔310内形成一銅 層320時’開孔31〇上方的周緣會由於尖端放電的效應， 致使銅層大量形成於内側壁上，形成所謂的突懸 (Overhang)33〇，進而造成隨後的電鍍無法成功的將銅填入 開孔3 10内，這特別容易發生於孔之深寬比大於4的情況。 有鑑於此，便有須提出一種於晶片内製造導線的方法， 以解決上述問題。 【發明内容】 本發明之目的在於提供一種於晶圓内形成導電線路的 方法，可避免以電鍍的方式於開孔内形成導電線路所引起 的突懸問題。 (. 為達上述目的，本發明之於晶圓内形成導電線路的方法 係利用乾式蝕刻或雷射燒蝕的方式於晶圓上表面形成開 孔，再將錫膏塗佈於開孔上，並將晶圓置於一真空的環境 内且將錫膏加熱融化。破壞此真空環境使得施加在錫膏上 方的氣體壓力大於開孔内氣體的壓力，藉此將熔融的錫膏 擠入開孔内。 根據本發明之於晶圓内形成導電線路的方法，係利用壓 力差的方式將溶融的錫膏擠入開孔内，避免了以電鍍的方 式於導孔内形成導電線路所引起的突懸問題。 01225-TW/ASE1889 6 200839903 為了讓本發明之上述和其他目的、特徵、和優點能更明 顯’下文特舉本發明實施例，並配合所附圖示 明如下。 F砰、、，田忒 【實施方式】 參考第4a圖，本發明之於晶圓内形成導電線路的方法 係於一晶圓400的上表面41〇形成一乾膜圖案㈣_ Ρ:—420’並於晶圓上表面41〇以乾式蝕刻的方式，形 成複數個開孔430 ’例如是深寬比大於6的盲孔或是貫通 至晶圓下表面440的通孔（見第朴圖）。接著，參考第“
圖’以例如網板印刷（screen printing)的方式，將錫膏CO 塗佈於晶圓上表面410,此時會有錫f分佈於開孔43〇上， 並接著將乾膜圖案420移除（見第切圖）。此外，亦可以 雷射燒姓之方式形成開㈣，此時則可不須於晶圓上表 面410形成乾膜圖案42〇。 參考第4e圖，為使錫膏45〇能擠入晶圓4〇〇的開孔43〇 内，將加熱錫膏450使其融化，並形成一環境使得施加在 晶圓上表面4H)的氣體壓力ΡιΑ於開孔43〇内的氣體壓力 p2。由於此壓力差，熔融的錫膏450會被擠入開孔43〇内 (見第4f圖）’藉此達到於晶圓内形成導電線路的目的。 上述於開孔430内外製造不同壓力之方法，係可將晶圓 伽置於一真空環境内’例如抽真空的真空腔體内，並於 晶圓上表面410塗佈錫膏450,再加熱錫膏45〇使其融化， 接著突然將真空環境破壞，此時施加在錫f 45Q上方的壓 力大於施加在錫f 450下方的壓力p2，熔融的錫膏 01225-TW/ASE 1889 7 200839903 450會因此壓力差被擠入開孔430内。 為使錫膏450更容易充滿於貫通晶圓上下表面的通孔 430内，可於晶圓下表面440施加一罩體（圖未示），罩蓋 通孔430的下方，當真空環境被破壞的瞬間，通孔43()内 仍能保持相對較低的壓力Pa，施加在錫膏450上方的壓力 Pi將因此迫使熔融的錫膏450擠入開孔go内。此外，參 考第5圖，由於熔融的錫膏45〇會因内聚力形成球狀，吾 人可利用此一物理現象並根據開孔430的大小適度地增加 " 錫膏450的量，使得錫膏450充滿開孔430後還可於開孔 43 0的上方形成球狀的凸塊5丨〇，如此，可省卻後續植球 (ball mount)的步驟。另外，本發明之於晶圓内形成導電線 路的方法，係可應用於具有電路的晶圓或空白晶圓 wafer)。上述晶圓經切割後可分別形成各具功能的晶片或 作為間隔用的虛晶片（dummy chip)。 根據本發明之於晶圓内形成導電線路的方法，係利用壓 (力差的方式將熔融的錫膏擠入開孔内，避免了以電鍛的方 式於導孔内开> 成導電線路所引起的突懸問題。 雖然本發明已以前述較佳實施例揭示，然其並非用以限 定本發明，任何熟習此技藝者，在不脫離本發明之精神和 範圍内，當可作各種之更動與修改。因此本發明之保護範 圍當視後附之申請專利範圍所界定者為準。 01225-TW/ASE 1889 8 200839903 【圖式簡單說明】 第1圖：為習知堆疊封裝構造之剖面圖。 第2圖：為第1圖中下方晶片的放大圖。 第3圖：為習知以電鍍方式於晶片開孔内形成銅層的 法。 曰方 第4a至4f圖：為本發明之於晶圓内形成導電線路的方 法。 第5圖：為本發明之於晶圓内形成導電線路的方法，另 於晶圓開孔的上方形成與開孔内的錫膏一體形成之凸塊。 01225-TW/ASE 1889 9 200839903 Γ 【圖號說明】 100 堆疊封裝構造 110 基板 120 晶片 122 主動面 124 背面 126 通孔 128 導電體 130 晶片 140 凸塊 150 凸塊 300 晶片 310 開孔 320 銅層 330 突懸 400 晶圓 410 上表面 420 乾膜圖案 430 開孔 440 下表面 450 錫膏 510 凸塊 Pi 壓力 P2 壓力 01225-TW/ASE 1889 10

Claims (1)

  1. 200839903 十、申請專利範圍： 包含下列步驟： 1、一種於晶圓内形成導電線路的方法 提供一晶圓； 於該晶圓的上表面形成複數個開孔 將錫膏塗佈於該等開孔上； 將該等錫膏加熱融化；及
    於該晶圓的上表面形成有—第— 等開孔内形成有一第二氣壓的環境:二的:^ :於第二氣壓，藉此將該等溶融的錫膏擠:該等：係 内形成導電線路的方 二氣壓的步驟包含： 真空的環境内；及 的環境。 2、如申請專利範圍第1項之於晶圓 法，其中使該第一氣壓大於該第 於錫膏塗佈前將該晶圓置於一 於錫膏加熱融化時破壞該真空 3 - 如申請專㈣圍第2項之於晶圓内形成導電線路的 法’其中該等開孔係為貫通至該晶圓下表面的通孔 使該第一氣壓大於該第二氣壓的步驟另包含· 方 ，該 於該晶圓置於該真空環境前施加一 圓的下表面。 罩體，罩蓋於該 晶 4、 如申請專利範圍第i項之於晶圓内形成導電線路的方 法’其中該等開孔係藉由雷射燒蝕的方式形成。 5、 如申請專利範圍第1項之於晶圓内形成導電線路的方 01225-TW/ASE 1889 11 200839903 法八中忒等開孔係藉由乾式蝕刻的方式形成 圓内形成導電線路的方法另包含： 4該於 於該等開孔形成之前先於該晶圓的上表面形成 膜圖案；及 於該等開孔形成之後移除該乾膜圖案。 6、如申凊專利範圍第】項之於晶圓内形成導電線路的方 法，另包含步驟·· 於該等開孔的上方形成複數個與該等開孔内的錫膏 一體形成之凸塊。 7如申明專利範圍帛i項之於晶圓内形成導電線路的方 法，其中該等錫㈣藉由網板印刷之方式塗佈於該等開 孔上。 8如申明專利範圍第丨項之於晶圓内形成導電線路的方 法’其中該等開孔的深寬比大於6。 i 01225-TW/ASE1889 12
TW096109644A 2007-03-21 2007-03-21 Method for manufacturing electrical connections in wafer TW200839903A (en)

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TW096109644A TW200839903A (en) 2007-03-21 2007-03-21 Method for manufacturing electrical connections in wafer
US12/046,097 US7681779B2 (en) 2007-03-21 2008-03-11 Method for manufacturing electric connections in wafer

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