TWI248152B - Semiconductor device, semiconductor chip, method for manufacturing semiconductor device, and electronic apparatus - Google Patents
Semiconductor device, semiconductor chip, method for manufacturing semiconductor device, and electronic apparatus Download PDFInfo
- Publication number
- TWI248152B TWI248152B TW093137058A TW93137058A TWI248152B TW I248152 B TWI248152 B TW I248152B TW 093137058 A TW093137058 A TW 093137058A TW 93137058 A TW93137058 A TW 93137058A TW I248152 B TWI248152 B TW I248152B
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- Taiwan
- Prior art keywords
- conductive layer
- conductive
- semiconductor device
- bump
- particles
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 title description 13
- 239000002245 particle Substances 0.000 claims abstract description 88
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052802 copper Inorganic materials 0.000 claims abstract description 37
- 239000010949 copper Substances 0.000 claims abstract description 37
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 239000011810 insulating material Substances 0.000 claims abstract description 7
- 238000002161 passivation Methods 0.000 claims description 46
- 239000003054 catalyst Substances 0.000 claims description 19
- 230000035515 penetration Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000007772 electroless plating Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 3
- 210000002784 stomach Anatomy 0.000 claims 1
- 239000010410 layer Substances 0.000 description 159
- 235000012431 wafers Nutrition 0.000 description 49
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 27
- 239000011347 resin Substances 0.000 description 21
- 229920005989 resin Polymers 0.000 description 21
- 229910052759 nickel Inorganic materials 0.000 description 13
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 6
- 229910052763 palladium Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49811—Additional leads joined to the metallisation on the insulating substrate, e.g. pins, bumps, wires, flat leads
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- 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
- H01L21/60—Attaching or detaching leads or other conductive members, to be used for carrying current to or from the device in operation
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
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- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
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- Wire Bonding (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
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1248152 (1) 九、發明說明 【發明所屬之技術領域】 本發明係關於一樓半導體裝置、半導體晶片、製造半 導體裝置之方法、及讓孑設備,尤其係關於一種被修改爲 覆晶安裝技術之半導體晶片。 本案主張於20〇3年12月5日申請之日本專利申請案 第2003-407386號以及20〇4年10月20日申請之日本專 ‘ 利申請案第2 〇 0 4 - 3 〇 5 5 1 9號之優先權,此兩專利案之內容 鲁 以倂入之方式援引爲本案之參考。 【先前技術】 目前,針對縮減諸如彳丁動電話及筆記型個人電腦之行 動式電子設備之尺寸、算度及重重以及製is成本有強烈的 需求。爲符何此等需求’已有考量使用在各種電子設備中 之半導體晶片之更高整合度’並且亦已硏究及發展出各種 半導體安裝技術。 Φ 京尤_^彳重用於安裝可以有效且能夠被可靠地以樹脂模製 之半導體晶片的技術而言,已有提出一種覆晶安裝技術, 例如揭示在日本未實審專利申請首次公告案第2(3〇『 286299號中。在此方法中’由鎳及金製成之凸塊被提供在 一半導體晶片上,且該半導體晶片及〜佈線板經由一非等 向性導電樹脂層而被電性地連接。 然而,此技術存在一個問題。爲確保與該佈線板具有 一良好的電性連接,內含在該非等向性導電樹脂層中之導 -4- (2) 1248152 電顆粒必須滲透進該金層中1而該金屬係構成被提供在半 導體晶片上之凸塊的表面。因此,由於必須形成一具有足 夠厚度之金層,因此無法達到進一步的成本降低。 【發明內容】 本發明係有鑑於上述的缺點而構思出來,且其一目的 係要提供一種高可靠度的半導體裝置及半導體晶片,其能 以較低之成本來製造,且亦可確保良好的電性連接,並且 提供一種製造一半導體裝置之方法,以及一種具有該半導 體裝置之電子設備。 爲解決上述之問題,依照本發明之一半導體裝置包括 一半導體晶片,其包括一基板、一外部連接電極及一凸 塊,其中該凸塊具有一第一導電層及一被提供在該第一導 電層上之第二導電層,且該第二導電層係由銅所製成【一 佈線板,其具有一者陸部;及一絕緣材料,其散佈有導電 性顆粒,其中該導電性顆粒連接於該凸塊及該著陸部之 間,其中藉由使該等導電性顆粒滲透至該第二導電層及該 著陸部兩者而建立一電性連接。 在上述半導體裝置中,由於導電性顆粒滲透至第二導 電層中之銅而取代該導電性顆粒僅接觸該第二導電層,因 此可確保一較大的接觸面積’且可提供一低阻抗之電性連 接。再者,在該第二導電層與該導電性顆粒之間的電性連 接可以抵抗由-溫度變動或振動等因素所造成之絕緣材料 的膨脹及收縮。因’便能以低成本來提供一具有可靠的 (3) (3)1248152 電性連接之半導體裝置。再者,在該半導體裝置中,由於 該導電性顆粒被牢固地夾置於凸塊之表面層中之銅與在佈 線板上之著陸部,因此可以確保一穩定的電性連接。因 此,便能以較低的成本來提供一具有可靠電性連接之半導 體裝置。 在上述半導體裝置中,該第二導電層之厚度較佳被選 擇,使得該導電性顆粒可滲透至該第二導電層之滲透深度 足以建立一電性連接。例如,該第二導電層之厚度可被選 擇,使得該導電性顆粒至該第二導電層之滲透的深度係該 導電性顆粒之顆粒尺寸的四分之一或以上。在半導體晶片 上之凸塊以及在佈線板上之著陸部通常具有不規則表面, 即非光滑者。若該導電性顆粒至該第二導電層之滲透深度 小於該導電性顆粒之顆粒尺寸的四分之一,則由於不規則 體之分佈造成接觸面積較小,因而無法建立一良好的電性 連接。相反地,若該導電性顆粒至第二導電層的滲透深度 爲該導電性顆粒之顆粒尺寸的四分之一或以上,則可確保 一較大的接觸面積,且消弭該不規則體的影響。因此,可 以的佈線板上之著陸部建立一良好的電性連接,且增進該 裝置之可靠度。 在上述半導體裝置中,該第二導電層之厚度可被選 擇,使得該導電性顆粒至第二導電層之滲透深度係該導電 性顆粒之顆粒尺寸的一半或以上,使得該凸塊及該著陸部 直接地接觸。由於導電性顆粒被穩固地夾置在該第二導電 層與佈線板上之著陸部之間,因此可確保一穩定的電性連 -6- (4) (4)1248152 接。藉此,可以建立一良好的電性連接且增進裝置的可靠 度。 在上述實施例中,一觸媒可被設置在該第一導電層及 第二導電層之間。在某些例子中,其中第一導電層採用某 些特定材料的組合,且該第二導電層可能未包含該等材 料。在某些例子中,諸如第二導電層剝離的問題可能會發 生。當在該第一導電層及第二導電層之間提供一觸媒,則 可藉由適當地選擇該觸媒,便可增進在第一導電層與第二 導電層間之附著性。 上述之半導體裝置可進一步包含一鈍化膜,其係形成 在該基板上,且在該外部連接電極中具有一開口,其中該 第一導電層被形成在該開口中,且具有一厚度等於或小於 該鈍化膜之厚度。該第一導電層可被形成在該開口中,且 其厚度等於或小於該鈍化膜之厚度。換言之,該第一導電 層可僅形成在被設置在該鈍化膜中之開口中。若一由堅硬 材料製成之第一導電層亦位在該鈍化膜上,則當藉由施加 一壓力至該半導體晶片而將該半導體晶片安裝在該佈線板 上時,該鈍化膜可能會因爲應力集中在該鈍化膜上而破 裂。相反地,若該第一導電層僅被形成在該鈍化膜中之開 口內部,則只有由銅製成之第二導電層會位在該鈍化膜 上。因此,當半導體晶片藉由施加一壓力至該半導體晶片 而被安裝在佈線板上時,銅的撓性有助於解除被施加在鈍 化膜上之應力。因此,可以防止諸如在鈍化膜中裂損的損 壞,如此便可實現高可靠度的半導體晶片。 (5) 1248152 在上述半導體裝置中,該第一導電層可以由具有與該 導電性顆粒相同之硬度或比該導電性顆粒更高之硬度的材 料所製成。再者,該導電性顆粒可包含一材料,該材料具 有比製成該第二導電層之銅還更高之硬度。在此一設計 中,由於導電性顆粒不會滲透至該第一導電層而是滲透至 第二導電層,因此可防止該導電性顆粒被完全埋入至該凸 塊。因此,可以增進該電性連接之可靠度。 本發明亦關於一種半導體晶片,包括:一基板;一形 成在該基板上之外部連接電極;一凸塊,其電性連接至該 外部連接電極,且包含一第一導電層及一被提供在該第一 導電層上之第二導電層,其中該第二導電層係由銅所製 成;及一鈍化膜,其在該外部連接電極上具有一開口,其 中該第一導電層接觸位在該鈍化膜中之該開口中之外部連 接電極之一前表面,而不接觸該鈍化膜之前表面。 若一第一導電層係由例如鎳之堅硬材料所製成,且亦 被形成在該鈍化膜上,則當該半導體晶片藉由施加一壓力 至該半導體晶片而被安裝在該佈線板上時,該鈍化膜可能 會由於應力集中在該佈線板上而破裂。相反地,若該第一 導電層僅被形成在該鈍化膜中之開口內部,則只有由銅製 成之第二導電層會位在該鈍化膜上。因此,當半導體晶片 藉由施加一壓力至該半導體晶片而被安裝在佈線板上時, 銅的撓性有助於解除被施加在鈍化膜上之應力。因此,可 以防止諸如在鈍化膜中裂損的損壞,如此便可實現高可靠 度的半導體晶片。 (6) 1248152 在上述之半導體晶片中,一觸媒可被插置在該第--導 電層及第二導電層之間。該觸媒可增進第一導電層與第二 導電層間之附著性。就該觸媒而言,可以例如使用鈀來作 爲該觸媒。 在上述之半導體晶片中,其中位在該鈍化膜中之開口 中之外部連接電極的厚度係〇 . 2微米或以上。具有一足夠 厚度之外部連接電極可降低在結合期間被定位在該外部連 接電極下方之基板受損。 在上述之半導體晶片中,一比該第一導電層還柔軟之 第三導電層被提供在該第一導電層與第二導電層之間。該 第三導電層可降低在結合期間被定位在該外部連接電極下 方之基板受損。 本發明亦關於一種製造一半導體裝置之方法,該半導 體裝置包含一具有一凸塊之半導體晶片及一具有一著陸部 之佈線板,該凸塊包含一第一導電層,該方法包含以下之 步驟:在該第一導電層上提供一由銅製成之第二導電層, 其中該第二導電層構成該凸塊之一部分;在該具有第二導 電層之凸塊與該著陸部之間插置一散佈有導電性顆粒之絕 緣材料;及將該凸塊壓抵在該著陸部上,使得該導電性顆 粒滲透至該第二導電層與該著陸部兩者中,以電性連接於 該凸塊及該著陸部之間。 在藉由上述製造方法所製造之半導體裝置中,由於由 於該導電性顆粒被牢固地夾置在佈線板上之著陸部與凸塊 之表面層中之銅之間,因此可保持一穩定的電性連接。因 (7) (7)1248152 此,依照本發明用於製造一半導體裝置之方法,便能以較 低成本來提供一具有可靠電性連接之半導體晶片。 上述之製造一半導體裝置之方法可進一步包含插置一 觸媒於該第一導電層及第二導電層之間的步驟。藉由適當 選擇該觸媒,可增進在第一導電層與第二導電層間之附著 性。 在上述之製造一半導體裝置之方法中,其中該第一導 電層及第二導電層之至少一者係利用一無電電鍍所形成。 由於可利用無電電鍍方法來形成具有一較小高度變化之凸 塊,因此便能以較低成本來提供一具有高可靠度的半導體 裝置。 依照本發明之一電子設備係包含上述之半導體裝置, 其能以較低成本來提供一具有高可靠度的電子設備。 【實施方式】 以下,本發明之各個實施例將參考諸附圖來予以說 明。應瞭解,這些實施例並非限制本發明在申請專利範圍 中所界定之範圍。再者,在諸實施例中並非所有元件爲申 請專利範圍中所界定之標的物的必要元件。 第一實施例 圖2係一槪要截面視圖,其中槪要依照本發明第一實 施例之半導體裝置。 一半導體裝置2包括一半導體晶片1、一具有複數著 -10- (8) 1248152 陸部2 1之佈線板2 Ο,以及一散佈有導電性 向性導電樹脂層3 1。 圖1係一槪要截面視圖,其槪要顯示包 實施例之半導體晶片。 該半導體晶片1包括複數個外部連接電 置在一由例如矽所製成之基板1 〇之一側面 40,其具有疊置在一起之一第一導電層13 層1 5。該第一導電層1 3係例如由鎳所製成 自1〇微米至25微米之厚度,且較爲約爲 二導電層15係由銅所製成,且具有大約5 該外部連接電極1 1係被電性連接至一已被 1 0上或其中且由鋁或銅所製成之積體電路 極。 再者,在該基板1 0上配置有該外部連ί 面上形成有一由氧化矽所製成之鈍化膜1 2 1 2中設有開口 1 2 a,使得該外部連接電極 外露。一開口 1 2 a被界定成使得一外部連接 央得以外露。在此例中’該外部連接電極1 該鈍化膜之一部分所覆蓋。換言之’在該基 有該外部連接電極1 1之側面上,該外部連老 少一部分係外露的,且該外部連接電極11 由該鈍化膜1 2所覆蓋。 一由例如鈀所製成之觸媒係被配置在該 與該第二導電層1 5之間。此觸媒有助於加 顆粒3 0之非等 :照本發明第一 極1 1,其被設 ,且包括凸塊 及一第二導電 :,且具有範圍 15微米。該第 微米之厚度。 形成在該基板 (未圖示)之電 妾電極1 1之側 。在該鈍化膜 1 1之部分可以 5電極 1 1之中 .1之邊緣係由 板 1 〇上配置 ,電極1 1之至 之其餘部分係 第一導電層1 3 強在該由鎳製 -11 - (9) 1248152 成之第一導電層1 3與該由銅製成之第二導電層〗5之間的 附著性’以增進互連之可靠度。 該佈線板2 0可以爲一由例如聚亞醯胺樹脂、聚酯膜 等等製成之可撓性基板,但不以此爲限。該佈線板2 0可 以爲堅硬的基板,諸如玻璃環氧樹脂基板或陶瓷基板。著 陸部2 1係導電層,其可以例如由銅所製成,或者由銀製 成’其具有比銅還低的電阻係數。 該非等向性導電樹脂層3 1係由熱固性樹脂所製成, 例如’環氧樹脂,且被夾置在該半導體晶片1上配置有該 凸塊40之一側面與該佈線板20上具有該著陸部2 1之一 側面之間,以密封及結合該半導體晶片1及佈線板20。該 導電性顆粒3 0係由諸如鎳之材料所製成,其具有比製成 該第二導電層1 5之銅還要高的硬度。該導電性顆粒3 0具 有範圍自0·2微米至5微米之顆粒尺寸,且較爲約爲4微 米之顆粒尺寸。在此所用之術語”導電性顆粒之顆粒尺寸” 係指該導電性顆粒之顆粒尺寸。 作爲一凸塊40之最外層之第二導電層15係接觸一著 陸部2 1。被夾置在該第二導電層1 5與著陸部2 1之間的導 電性顆粒3 0會滲透至該第二導電層1 5及著陸部2 1兩 者。換言之,當導電性顆粒30被夾置在一凸塊40與一著 陸部2 1之間時,由鎳製成之導電性顆粒3 0由於鎳比銅還 硬而會滲透至該由銅製成之第二導電層15且被陷留在其 中。該第二導電層15之厚度被予以選擇,以使得該導電 性顆粒3 0滲透至該第二導電層1 5而建立一電性連接。該 - 12- (10) 1248152 導電性顆粒至該第二導電層1 5之深度被設定爲大約5微 米,使得滲透之深度爲該導電性顆粒3 0之顆粒尺寸的四 分之一或以上,在本實施例中即爲1微米或以上。在此所 用之術語”該導電性顆粒之滲透深度,,係指導電性顆粒滲透 至該第二導電層中之平均距離。若該導電性顆粒3 0被夾 置在一凸塊4 0與一著陸部2 1之間,同時該凸塊4 0及該 著陸部2 1直接地接觸時,則有可能造成該導電性顆粒3 0 滲透至該第二導電層1 5中之滲透深度爲該導電性顆粒3 0 之顆粒尺寸的一半或以上,在此實施例中即爲2微米或以 上。因此,該凸塊4 0及著陸部2 1經由該導電性顆粒3 0 而電性連接在一起。 應瞭解,該第一導電層13可以由與該導電性顆粒30 同樣堅硬之材料所製成’或甚至由比導電性顆粒3 〇更硬 之材料來製成。這可防止該導電性顆粒3 0被完全埋入至 一凸塊40中,且可增進該電性連接的可靠度。 以下,將說明圖2所示之半導體裝置2之製造程序。 圖3A至3F係半導體裝置2之製造程序之槪要截面視圖。 在諸圖式中,只顯示與本發明有關之元件。 如圖3 A所不,提供一由砂或類似材料製成且於其上 已开:^成有一積體電路(未圖不)之基板1〇。該基板10包括 複數個外部連接電極1 1。該等外部連接電極n係被電性 連接至已形成在該基板丨0上之積體電路的電極,且其係 由鋁或銅或類似材料所製成。 接下來,將鈍化膜1 2沉積在該基板1 〇上提供有該等 -13- (11) (11)1248152 外部連接電極之側面上。該鈍化膜12係由例如一由氧化 矽或氮化矽(其爲該基板1 0之材料(s i 0 2或s i N))、聚亞醯 胺或類似材料製成之薄膜所製成。 fe:下來’將說明在每一外部連接電極1 1上形成一凸 塊之步驟。如圖3B所示,當該等外部連接電極i丨由鋁製 成時,該等外部連接電極11係會受到一鋅化處理,以電 解性地以鋅來更換表面上之鋁,以形成一由鋅所製成之金 屬覆層(未圖示)。接著,將該第一導電層13形成在該等外 部連接電極丨丨上。該第一導電層係由例如鎳所製成,且 可以利用無電電鍍方法來形成。換言之,已受到鋅化處理 之談等外部連接電極1 1係被沉浸至一無電鎳電鍍溶液中 以运成 取代反應’其中鉢金屬覆層被鎮所取代,因此鑛 覆鎳。該第一導電層之厚度係例如大約爲1 〇微米至2 5微 米’且較佳大約爲1 5微米。在此實施例中,其係提供有 磨菇狀凸塊,且無需使用一光罩而形成該導電層。然而, 在此應瞭解’亦可以利用一具有一光阻層之光罩來形成直 壁式凸塊。 接下來,一觸媒被沉積在該第一導電層13上。該觸 媒例如可以係鈀。爲了沉積鈀,可以採用感應-觸發方法 或觸媒-加速器方法。 接下來,如圖3C所示,形成該第二導電層15。該第 二導電層1 5係由例如銅所製成,且可利用無電電鍍方法 來形成。詳言之,該第一導電層1 3係被沉浸至一銅電鍍 溶液中。被沉積在該第一導電層1 3上之鈀係用以作爲觸 -14 - (12) 1248152 媒而將銅析出。該第二導電層1 5之厚度較佳約爲5微 米。該觸媒可增進在第一導電層與第二導電層之間的附著 性。 在上述步驟中,一包括第一導電層13及第二導電層 1 5之凸塊係被形成在每—外部連接電極丨i上,因此,便 製成該半導體晶片1。 接下來,如圖3 D所示,提供一佈線板2 0,且在其一 表面上提供有複數個著陸部2 1。在在該佈線板2 0上已提 供有該等著陸部2 1之表面上提供一非等向性導電樹脂層 3 1。該佈線板2 0可以爲一由例如聚亞醯胺樹脂、聚酯膜 等等材料製成之撓性基板,但不以此爲限。該佈線板20 亦可以爲一堅硬基板,諸如一玻璃環氧樹脂基板或一陶瓷 基板。著陸部2 1係導電層,其可以由例如銅所製成,或 者係由銀所製成,其具有比銅還低的電阻係數。 該非等向性導電樹脂層3 1係由例如熱固性樹脂之板 狀環氧樹脂所製成,且具有一附著屬性。該非等向性導電 樹脂層3 1利用網版印刷或施配方法而被提供在該佈線板 2 0上。應瞭解,該非等向性導電樹脂層3 1可以藉由施加 一樹脂膜於該佈線板2 0上來形成。在該非等向性導電樹 脂層3 1中係散佈有複數個導電性顆粒。 然後,如圖3 E所示,在圖3 C中所示之半導體晶片1 被上下倒置,且被定位成與該具有該非等向性導電樹脂層 3 1之佈線板2 0相對置。詳言之,一凸塊4 0被定位成與該 佈線板2 0上之一藉以建立一電性連接之著陸部2 1相對 -15- (13) 1248152 置’且該半導體晶片1藉由該非等向性導電樹脂層 屬性而被暫時附著至該非等向性導電樹脂層。一具有 坦加壓表面之熱壓工具5 0被加熱至該非等向性導電 層3 1之熟化溫度。在將該熱壓工具5 〇之平坦加壓表 置成平行於佈線板2 0的同時,將壓力施加至該平坦 表面’使得該半導體晶片1被壓抵於該佈線板2 〇。 因此’如圖3 F所示,該非等向性導電樹脂層3 i 凸塊4 G所移位,直到該凸塊4 〇接觸被設置在該佈線 上之著陸部2 1爲止。內含在該非等向性導電樹脂層 之導電性顆粒30被夾置在該第二導電層15(其爲凸主 之最外層)與該著陸部2 1之間。由於該導電性顆粒3 有比銅製成之第二導電層15還要大的硬度,因此該 性顆粒3 0會滲透至該第二導電層1 5中。該導電性顆 至該第二導電層1 5的滲透深度係被設定爲該導電性 3 〇之顆粒尺寸的至少四分之一或以上,例如大約爲1 滲透深度。若該導電性顆粒3 0被夾置在一凸塊4 0與 陸部2 1之間且同時該凸塊40及著陸部2 1直接相 時,則該導電性顆粒3 0至該第二導電層1 5的滲透深 可能會達到該導電性顆粒3 0之的一半或以上,在本 例中爲2微米或以上之滲透深度。在此同時,該導電 粒3 0滲透至該由銅或銀所製成之著陸部2 1。因此, 凸塊4 〇及著陸部2 1之間便可以建立一電性連接’其 低接觸阻抗且具有高可靠度,並且可以抵抗由於溫度 或振動所造成之膨脹或收縮。 .附著 一平 樹脂 面放 加壓 由該 板20 3 1中 鬼40 丨〇具 導電 粒30 顆粒 微之 一著 接觸 度有 實施 性顆 在該 具有 變化 -16- (14) (14)1248152 應暸解,在本實施例中,當該半導體晶片1被垂直地 壓抵該佈線板2 0且施加壓力時,可以施加由超音波振動 所產生之微振動。這可使該導電性顆粒3 0容易地切入該 由銅製成之第二導電層1 5以及一形成在該著陸部2 1之表 面上之氧化膜,以確保一更佳的電性連接。 然後,在保持該凸塊4 0與著陸部2 1間之電性連接的 同時,將該非等向性導電樹脂層3 1熱熟化,以密封及結 合該半導體晶片1與佈線板2 0。 如上所述,依照本實施例,由於該導電性顆粒3 0滲 透該由銅製成之第二導電層15與被設置在佈線板20上之 著陸部2 1兩者,因此增加接觸面積,這可以提供一低阻 抗的電性連接。再者,由於該導電性顆粒3 0被夾置在凸 塊4 0與該佈線板2 0上之著陸部2 1之間,因此互連部可 以抵抗由於溫度變化或振動等所造成之絕緣材料的膨脹及 收縮。因此’便能以一'較低的成本來提供一具有一良好電 性連接之半導體晶片。再者,由於該凸塊4 0可利用無電 電鍍來形成,如此便可製成具有較小之高度變動的凸塊。 第二實施例 接下來將說明依照本發明之半導體晶片的第二實施 例。圖4係一槪要截面視圖,其中槪要顯示半導體晶片之 第二實施例,其對應於圖1所示之第一實施例。第二實施 例之一半導體晶片3包括一凸塊4 0,其包括一第一導電層 13及一第二導電層ι5,且一凸塊4〇被提供於被設置在由 -17- (15) (15)1248152 矽製成之基板1 0之一側面上之每一該等外部連接電極} i 上。第二實施例與第一實施例的不同處在於該第一導電層 13被提供在一開口 Ua中,該開口被設置在—鈍化膜12 中’且該第一導電層i 3之厚度係等於或小於該鈍化膜i 2 之厚度。換言之’該第一導電層丨3僅被提供在該鈍化膜 1 2之開口 1 2 a中。該第一導電層丨3接觸位在該鈍化膜1 2 Z開口 12a中之外部連接電極11之一前表面up,且不會 接觸該純化膜之則表面。在此圖式中,相同之元件標號標 示圖1所示之對應的元件,且將省略其說明。 該鈍化膜1 2係一由例如一氧化矽製成之薄膜,且其 具一範圍從1微米至3微米之厚度,且較佳約爲1 · 5微 米。該第一導電層1 3係由例如鎳所製成,且電性連接至 一外部連接電極1 1。該第一導電層1 3之厚度可以係相等 於或小於該鈍化膜1 2之厚度的任意値。該第一導電層i 3 之厚度較佳約爲1 · 5微米,其係該鈍化膜之厚度,使得該 第一導電層13及包圍該第一導電層13之鈍化膜12位在 相同平面上。 依照本實施例,由於僅有該由銅製成之第二導電層i 5 被形成在該鈍化膜12之前表面12F上,因此當半導體晶 片3藉由施加壓力至該半導體晶片3而被安裝在該佈線板 2 0時,被施加至該鈍化膜1 2的應力可藉由銅的撓性而解 除。因此,便可以防止諸如在鈍化膜1 2中之破損所造成 損壞,且可以實現一具有高度可靠度的半導體晶片。 再次地,在本實施例中,一例如由鈀所製成之觸媒 -18- (16) (16)1248152 (未圖示)被插置在第一導電層與第二導電層15之間。該觸 媒可以加強在鎳製成之第一導電層13與銅製成之第一導 電層1 5之間的附著性。 第三實施例 圖5係依照本發明之第三實施例之半導體裝置的截面 視圖。如圖5所示,一比該第一導電層1 3還軟之第二導 電層13’可被提供在該第一導電層13與該第二導電層15 之間。在本實施例中,該第一導電層13係由鎳(Ni)製成, 且該第三導電層13’係由金(An)所製成,其係一比鎳還軟 之金屬。該第三導電層1 3,可以降低在結合期間被定位在 該等外部連接電極1 1下方之基板1 0的損壞(矽裂損)。該 由金製成之弟二導電層13’可以防止第一導電層13等等的 氧化。該第三導電層13,在上述實施例中亦可作爲一觸 媒。 在上述實施例中,被提供在一鈍化膜1 2之開口 i2a 中之一外部連接電極1 1的厚度較佳爲〇 . 2微米或以上。 由於該由鋁(A1)製成之外部連接電極n具有一足夠之厚 度,因此便可以降低在結合期間被定位在該外部連接電極 1 1下方之基板1 0的損壞(矽裂損)。 在圖6中顯示—行動電話〗〇 〇,其係一具有依照本實 施例之半導體裝置之電子設備的一個實例。在圖2所示之 半導體裝置被安裝在此類電子設備之一殼體中。 該電子設備未侷限於IC卡或行動電話,且本發明亦 -19- (17) 1248152 可以應用於各種不同的電子設備。例如,本發明可應用於 範圍極廣的電子設備,包括筆記型個人電腦、個人數位助 理(PDAs)、電子記事本、電子桌上型計算器、液晶投影 器、印表機等等。 雖然本發明之較佳實施例已說明及闡釋如上,然而應 瞭解這些都是本發明之範例而不應被視爲限制。在不違背 本發明之主旨或範圍的情況下,仍可實行增添、省略、取 代及其他的更動。因此,本發明並非由以上之說明所限 制,其僅由後附申請專利範圍所限制。 【圖式簡單說明】 圖1係一槪要截面視圖,其中槪要顯示依照本發明第 一實施例之半導體晶片; 圖2係一槪要截面視圖,其中槪要顯示依照本發明第 一實施例之半導體裝置; 圖3A至3F係槪要截面視圖,其中顯示圖2所示之該 半導體裝置之一製造步驟的範例; 圖4係一槪要截面視圖,其中槪要顯示依照本發明第 二實施例之一半導體晶片; 圖5係—槪要截面視圖,其中槪要顯示依照本發明第 三實施例之一半導體晶片;及 圖6係-槪要截面視圖’其中槪要顯示依照本發明之 一實施例之一電子設備。 -20- (18) (18)1248152 【主要元件符號說明】 1 :半導體晶片 2 :半導體裝置 3 :半導體晶片 1 〇 :基板 1 1 :外部連接電極 1 1 F :前表面 1 2 :鈍化膜 _ 1 2 a :開口 1 2F :前表面 13 :第一導電層 13’ :第三導電層 15 :第二導電層 2 0 :佈線板 21 :著陸部 3 0 :導電性顆粒 參 3 1 :非等向性導電樹脂層 40 :凸塊 100 :行動電話 -21 -
Claims (1)
- (1) 1248152 十、申請專利範圍 1· 一種半導體裝置,包含·· 一半導體晶片包含: 一基板; 一外部連接電極;及 一凸塊’其中該凸塊具有一第一導電層及一被提供 在該第一導電層上之第二導電層,且該第二導電層係由銅 所製成; 一佈線板,其具有一著陸部;及 一絕緣材料,其散佈有導電性顆粒,其中該導電性顆 粒連接於該凸塊及該著陸部之間, 其中藉由使該等導電性顆粒滲透至該第二導電層及該 著陸部兩者而建立一電性連接。 2.如申請專利範圍第1項之半導體裝置,其中該第二 導電層之厚度被選擇,使得該導電性顆粒可滲透至該第二 導電層來建立該電性連接。 3 .如申請專利範圍第1項之半導體裝置,其中該第二 導電層之厚度被選擇,使得該導電性顆粒至該第二導電層 之滲透的深度係該導電性顆粒之顆粒尺寸的四分之一或以 上。 4 ·如申請專利範圍第1項之半導體裝置,其中該第二 導電層之厚度被選擇,使得該導電性顆粒至第二導電層之 滲透深度係該導電性顆粒之顆粒尺寸的一半或以上,使得 該凸塊及該著陸部直接地接觸。 -22- (2) (2)1248152 5 ·如申請專利範圍第丨項之半導體裝置,其中一觸媒 被設置在該第一導電層及第二導電層之間。 6 .如申請專利範_第1項之半導體裝置,其進一步包 含一鈍化膜,其係形成在該基板上,且在該外部連接電極 中具有一開口’其中該第一導電層被形成在該開口中,且 具有一厚度等於或小於該鈍化膜之厚度。 7 ·如申請專利範»第1項之半導體裝置,其中該第一 導電層係由具有與該導電性顆粒相同之硬度或比該導電性 顆粒更高之硬度的材料所製成。 8 ·如申請專利範圍第1項之半導體裝置,其中該導電 性顆粒包含一材料’該材料具有比製成該第二導電層之銅 還更高之硬度。 9. 一種半導體晶片,包含: 一基板; 一形成在該基板上之外部連接電極; 一凸塊,其電性連接至該外部連接電極,且包含一第 一導電層及一被提供在該第一導電層上之第二導電餍’其 中該第二導電層係由銅所製成;及 一鈍化膜,其在該外部連接電極上具有一開口’ 其中該第一導電層接觸位在該鈍化膜中之該_ D Ψ / 外部連接電極之一前表面,而不接觸該鈍化膜之胃ij $ $ 贫中'觸 1 0 .如申請專利範圍第9項之半導體晶片’ # + 媒被插置在該第一導電層及第二導電層之間。 1 1 .如申請專利範圍第9項之半導體晶片’其φ ^ $ -23- (3) 1248152 該鈍化膜中之開口中之外部連接電極的厚度係0.2微米或 以上。 12. 如申請專利範圍第9項之半導體晶片’其中一比 該第一導電層還柔軟之第三導電層被提供在該第一導電層 與第二導電層之間。 13. —種製造一半導體裝置之方法,該半導體裝置包 含一具有一凸塊之半導體晶片及一具有一著陸部之佈線 板,該凸塊包含一第一導電層’該方法包3以下之步驟: 在該第一導電層上提供一由銅製成之第二導電層,其 中該第二導電層構成該凸塊之一部分; 在該具有第二導電層之凸塊與該著陸部之間插置一散 佈有導電性顆粒之絕緣材料;及 將該凸塊壓抵在該著陸部上,使得該導電性顆粒滲透 至該第二導電層與該著陸部兩者中,以電性連接於該凸塊 及該著陸部之間。 14. 如申請專利範圍第13項之製造一半導體裝置之方 法,其進一步包含插置一觸媒於該第一導電層及第二導電 層之間的步驟。 15·如申請專利範圍第14項之製造一半導體裝置之方 法,其中該第一導電層及第二導電層之至少一者係利用一 無電電鍍所形成。 1 6 · —種電子設備,其包含依照申請專利範圍第1項 之半導體裝置。 -24-
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JP5481249B2 (ja) | 2010-03-26 | 2014-04-23 | 富士通株式会社 | 半導体装置及びその製造方法 |
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- 2004-10-20 JP JP2004305519A patent/JP2005191541A/ja not_active Withdrawn
- 2004-11-30 US US11/000,516 patent/US7528487B2/en not_active Expired - Fee Related
- 2004-11-30 CN CNB2004101000077A patent/CN100373607C/zh not_active Expired - Fee Related
- 2004-12-01 TW TW093137058A patent/TWI248152B/zh not_active IP Right Cessation
- 2004-12-02 KR KR1020040100552A patent/KR100691062B1/ko not_active IP Right Cessation
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US7528487B2 (en) | 2009-05-05 |
CN100373607C (zh) | 2008-03-05 |
JP2005191541A (ja) | 2005-07-14 |
TW200529339A (en) | 2005-09-01 |
KR20050054834A (ko) | 2005-06-10 |
CN1645602A (zh) | 2005-07-27 |
US20050127504A1 (en) | 2005-06-16 |
KR100691062B1 (ko) | 2007-03-09 |
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