TWI430415B - 晶片封裝體及其製造方法 - Google Patents
晶片封裝體及其製造方法 Download PDFInfo
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- TWI430415B TWI430415B TW098145454A TW98145454A TWI430415B TW I430415 B TWI430415 B TW I430415B TW 098145454 A TW098145454 A TW 098145454A TW 98145454 A TW98145454 A TW 98145454A TW I430415 B TWI430415 B TW I430415B
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- 238000000034 method Methods 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000010410 layer Substances 0.000 claims description 87
- 239000011241 protective layer Substances 0.000 claims description 55
- 238000005538 encapsulation Methods 0.000 claims description 36
- 239000004065 semiconductor Substances 0.000 claims description 31
- 230000002093 peripheral effect Effects 0.000 claims description 27
- 125000006850 spacer group Chemical group 0.000 claims description 27
- 239000000758 substrate Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 13
- 239000011810 insulating material Substances 0.000 claims description 7
- 229920002120 photoresistant polymer Polymers 0.000 claims description 7
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 6
- 229910001925 ruthenium oxide Inorganic materials 0.000 claims description 3
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 238000005530 etching Methods 0.000 claims description 2
- 235000012431 wafers Nutrition 0.000 description 49
- 239000011521 glass Substances 0.000 description 3
- 238000012858 packaging process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 229910000449 hafnium oxide Inorganic materials 0.000 description 2
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 2
- 238000001459 lithography Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011022 opal Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
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Description
本發明係有關於一種晶片封裝體,特別有關於一種可以在切割製程中保護導電墊的晶片封裝體及其製造方法。
目前業界針對晶片的封裝已發展出一種晶圓級封裝技術,於晶圓級封裝體完成之後,需在各晶片之間進行切割步驟,以分離各晶片。
然而由於在使用切割刀形成開口時會產生許多碎屑,這些碎屑有可能使得接合墊在切割製程中受到損害及刮傷,因此在後續製程中會產生打線接合的信賴性問題,導致習知的晶片封裝體電性不良。
因此,業界亟需一種晶片封裝體,其可以克服上述問題,避免導電墊在切割製程中受到損害。
本發明實施例係提供一種晶片封裝體,包括一含有晶片的半導體基底,具有元件區和周邊接墊區,複數個導電墊設置於周邊接墊區上,晶片保護層覆蓋於半導體基底上,暴露出該些導電墊,絕緣保護層形成於元件區上,以及封裝層設置於絕緣保護層之上,暴露出該些導電墊。
此外,本發明另一實施例還提供一種晶片封裝體的製造方法,包括:提供一半導體晶圓,包含複數個元件區,任兩個相鄰的該元件區之間包括一周邊接墊區,且該周邊接墊區包括複數個導電墊,以及一晶片保護層,覆蓋該半導體晶圓,且暴露出該些導電墊;形成一絕緣保護層於該晶片保護層上,且覆蓋該些導電墊;提供一封裝層;接合該半導體晶圓與該封裝層;定義該封裝層,以形成複數個開口,其暴露出該周邊接墊區內的絕緣保護層;以及以該封裝層為硬罩幕,除去該周邊接墊區內的絕緣保護層,暴露出該些導電墊。
為了讓本發明之上述目的、特徵、及優點能更明顯易懂,以下配合所附圖式,作詳細說明如下:
以下以實施例並配合圖式詳細說明本發明,在圖式或說明書描述中,相似或相同之部分係使用相同之圖號。且在圖式中,實施例之形狀或是厚度可擴大,以簡化或是方便標示。再者,圖式中各元件之部分將以描述說明之,值得注意的是,圖中未繪示或描述之元件,為所屬技術領域中具有通常知識者所知的形式。另外,特定之實施例僅為揭示本發明使用之特定方式,其並非用以限定本發明。
本發明係以一製作影像感測元件封裝體(image sensor package)的實施例作為說明。然而,可以了解的是,在本發明之晶片封裝體的實施例中,其可應用於各種包含主動元件或被動元件(active or passive elements)、數位電路或類比電路(digital or analog circuits)等積體電路的電子元件(electronic components),例如是有關於光電元件(opto electronic devices)、微機電系統(Micro Electro Mechanical System;MEMS)、微流體系統(micro fluidic systems)、或利用熱、光線及壓力等物理量變化來測量的物理感測器(Physical Sensor)。特別是可選擇使用晶圓級封裝(wafer scale package;WSP)製程對影像感測元件、發光二極體(light-emitting diodes;LEDs)、太陽能電池(solar cells)、射頻元件(RF circuits)、加速計(accelerators)、陀螺儀(gyroscopes)、微制動器(micro actuators)、表面聲波元件(surface acoustic wave devices)、壓力感測器(process sensors)或噴墨頭(ink printer heads)等半導體晶片進行封裝。
其中上述晶圓級封裝製程主要係指在晶圓階段完成封裝步驟後,再予以切割成獨立的封裝體,然而,在一特定實施例中,例如將已分離之半導體晶片重新分布在一承載晶圓上,再進行封裝製程,亦可稱之為晶圓級封裝製程。另外,上述晶圓級封裝製程亦適用於藉堆疊(stack)方式安排具有積體電路之多片晶圓,以形成多層積體電路(multi-layer integrated circuit devices)之晶片封裝體。
本發明之實施例係提供一種晶片封裝體及其製造方法,在上述元件的晶圓級封裝體完成之後,以切割製程分割各元件時,晶片封裝體的導電墊可受到保護,避免被切割製程產生的殘餘物損害或刮傷。
接著,請參閱第1A至1F圖,其係顯示依據本發明之一實施例,形成晶片封裝體之製造方法的剖面示意圖。如第1A圖所示,首先提供一包含複數個晶片之半導體晶圓100,其具有元件區100A,任兩個相鄰的元件區100A之間為周邊接墊區100B,以及複數個導電墊104,位於周邊接墊區100B上。此外,半導體晶圓100在晶圓廠產出時一般係覆蓋有一晶片保護層106(passivation layer),例如為氮化矽層,同時為將晶片內的元件電性連接至外部電路,晶圓廠會事先定義晶片保護層106以形成複數個暴露出導電墊104的開口。
接著,如第1B圖所示,在半導體晶圓100的表面上全面性形成與晶片保護層106不同材料之絕緣保護層108,其覆蓋著晶片保護層106以及導電墊104,絕緣保護層108例如為氧化矽層,可利用化學氣相沈積法形成。
然後,如第1C圖所示,提供封裝層200以與半導體晶圓100接合,封裝層200例如為玻璃基板或是另一空白矽晶圓。在一實施例中,可藉由間隔層110分開封裝層200與半導體晶圓100,同時形成由間隔層110所圍繞的間隙116。間隔層110可以為密封膠,或是感光絕緣材料,例如環氧樹脂(epoxy)、阻銲材料(solder mask)等。此外間隔層110可先形成於絕緣保護層108上,之後再藉由黏著層(未顯示)與相對之封裝層200接合,反之,亦可將間隔層110先形成於封裝層200上,之後再藉由黏著層(未顯示)與相對之絕緣保護層108接合。
如第1D圖所示,使用切割刀(未繪出)在封裝層200內產生開口114,其暴露出周邊接墊區100B的表面,此時切割製程所產生的切割殘餘物118,例如玻璃或矽材料碎屑會掉落在絕緣保護層108上。而由於導電墊104受到絕緣保護層108覆蓋,因此可避免導電墊104在切割製程中被切割殘餘物118損害或刮傷。
接著,如第1E圖所示,經由封裝層200的開口114除去周邊接墊區100B的至少部份絕緣保護層108,暴露出導電墊104以及晶片保護層106,以利後續在導電墊104上形成與外部電路的電性連接,此時剩餘的絕緣保護層108a,覆蓋著整個由間隔層110所圍繞的元件區100A。在此實施例中,由於絕緣保護層108可以為非光阻的絕緣材料,例如氧化矽,此時可利用具有開口114的封裝層200作為硬遮罩(hard mask),藉由蝕刻方式去除周邊接墊區100B內的絕緣保護層108,不需要額外的微影製程去形成光阻圖案作為遮罩。同時,由於絕緣保護層108的材料與原有晶片保護層106的材料不同,因此晶片保護層106可作為絕緣保護層108的蝕刻停止層。在另一實施例中,亦可選擇以微影製程定義周邊接墊區100B內的絕緣保護層108,形成暴露出導電墊104的開口。
此外,絕緣保護層108亦可選擇光阻材料,此時可實施一曝光步驟,並藉由封裝層200的開口114,使用顯影製程將周邊接墊區100B內的絕緣保護層108去除。在此實施例中,間隔層110的材料為不透光材料,位於間隔層110下方的絕緣保護層108a由於不會被曝光,或是曝光程度小於其他區域,可使間隔層110下方的絕緣保護層108a之硬度因此大於其他區域如間隙116內被曝光但未被顯影的絕緣保護層108a之硬度,使得間隔層110下方的結構強度增加。
此外,在本發明之一實施例中,由於間隔層110與氧化矽的附著力係大於間隔層110與氮化矽的附著力,因此在上述例子中間隔層與原有氮化矽晶片保護層106間的介面附著力將不如間隔層與新增氧化矽保護層108a間的介面附著力,因此額外形成的氧化矽保護層108a可增加晶片封裝體的信賴度。
接著,請參閱第1E及1F圖,沿著周邊接墊區的切割線112將半導體晶圓100分割,即可形成複數個晶片封裝體,如第1F圖所示。
請參閱第1F圖,其係顯示依據本發明一實施例之晶片封裝體的剖面示意圖,沿著切割線112分離晶圓成晶片封裝體102。半導體基底100例如由包含晶片之半導體晶圓分割而來,半導體基底100可分為元件區100A和周邊接墊區100B,圍繞元件區100A的區域為周邊接墊區100B。
在半導體基底100的周邊接墊區100B上具有複數個導電墊(conductive pad)104,例如為接合墊(bonding pad),導電墊104可透過金屬連線(未顯示)連接至晶片內部。在半導體基底100的表面上則覆蓋有晶片保護層106,例如為氮化矽或氮氧化矽,晶片保護層106另暴露出導電墊104,其可以透過打線接合而電性連接至外部電路。位於元件區100A的晶片保護層106上還覆蓋有絕緣保護層108a,例如為氧化矽材料。而在絕緣保護層108a上另設置有封裝層200。
在一實施例中,晶片封裝體可應用於影像感測元件,例如互補式金氧半導體元件(CMOS)或電荷耦合元件(charge-couple device;CCD),此外如微機電元件等亦不在此限。
上述導電墊104較佳可以由銅(copper;Cu)、鋁(aluminum;Al)或其它合適的金屬材料所製成。而在封裝層200與半導體基底100之間可設置間隔層(spacer)110,使半導體基底100與封裝層200之間形成間隙(cavity)116,間隙116被間隔層110所圍繞。
在一實施例中,封裝層200可以是透明基底,例如玻璃、石英(quartz)、蛋白石(opal)、塑膠或其它任何可供光線進出的透明基板。值得一提的是,也可以選擇性地形成濾光片(filter)及/或抗反射層(anti-reflective layer)於封裝層200上。在非感光元件晶片的實施例中,封裝層200則可以是半導體材料層,例如矽覆蓋層。
在另一實施例中,絕緣保護層108a與封裝層200之間也可以完全填滿間隔層110,而不形成間隙。
上述間隔層110可以是環氧樹脂(epoxy resin)、防銲層(solder mask)或其它適合之絕緣物質。
依據本發明之實施例,可在晶圓級封裝體的切割製程中形成絕緣保護層在導電墊上,避免導電墊被切割殘餘物損害及刮傷,而在後續除去絕緣保護層的製程中,因切割製程產生開口的封裝層又可作為硬遮罩,因此不需額外形成光阻圖案遮罩。
雖然本發明已揭露較佳實施例如上,然其並非用以限定本發明,任何熟悉此項技藝者,在不脫離本發明之精神和範圍內,當可做些許更動與潤飾,因此本發明之保護範圍當視後附之申請專利範圍所界定為準。
100‧‧‧半導體基底
100A‧‧‧元件區
100B‧‧‧周邊接墊區
102‧‧‧晶片封裝體
104‧‧‧導電墊
106‧‧‧晶片保護層
108、108a‧‧‧絕緣保護層
110‧‧‧間隔層
112‧‧‧切割線
114‧‧‧封裝層開口
116‧‧‧間隙
118‧‧‧切割殘餘物
200‧‧‧封裝層
第1A-1F圖係顯示依據本發明之一實施例,形成晶片封裝體之製造方法的剖面示意圖。
100...半導體基底
100A...元件區
100B...周邊接墊區
102...晶片封裝體
104...導電墊
106...晶片保護層
108a...絕緣保護層
110...間隔層
116...間隙
200...封裝層
Claims (18)
- 一種晶片封裝體,包括:一半導體基底,具有一元件區和一周邊接墊區,該周邊接墊區係圍繞該元件區;複數個導電墊,設置於該半導體基底的該周邊接墊區上;一晶片保護層,覆蓋於該半導體基底上,且暴露出該些導電墊;一絕緣保護層,覆蓋該元件區而不及於該周邊接墊區;以及一封裝層,設置於該絕緣保護層上,且暴露出該些導電墊。
- 如申請專利範圍第1項所述之晶片封裝體,其中該封裝層暴露出該些導電墊及位於該周邊接墊區的該晶片保護層。
- 如申請專利範圍第1項所述之晶片封裝體,更包括一間隔層設置於該封裝層與該絕緣保護層之間。
- 如申請專利範圍第1項所述之晶片封裝體,更包括一間隙形成於該封裝層與該絕緣保護層之間,且其中該間隙被該間隔層所圍繞。
- 如申請專利範圍第1項至第4項任一項所述之晶片封裝體,其中該絕緣保護層與該晶片保護層的材料不同。
- 如申請專利範圍第5項所述之晶片封裝體,其中該晶片保護層的材料包括氮化矽,該絕緣保護層的材料包括氧化矽。
- 如申請專利範圍第5項所述之晶片封裝體,其中該絕緣保護層的材料包括光阻絕緣材料。
- 如申請專利範圍第4項所述之晶片封裝體,其中該絕緣保護層在該間隔層下方區域之硬度大於其他區域。
- 如申請專利範圍第5項所述之晶片封裝體,其中該封裝層包括一透明基底或一半導體基底。
- 一種晶片封裝體的製造方法,包括:提供一半導體晶圓,包含複數個元件區,任兩個相鄰的該元件區之間包括一周邊接墊區,且該周邊接墊區包括複數個導電墊,以及一晶片保護層,覆蓋該半導體晶圓,且暴露出該些導電墊;形成一絕緣保護層於該晶片保護層上,且覆蓋該些導電墊;提供一封裝層;接合該半導體晶圓與該封裝層;定義該封裝層,以形成複數個開口,其暴露出該周邊接墊區內的絕緣保護層,其中定義該封裝層的步驟包括一切割製程,且於該切割製程中,該些導電墊被該絕緣保護層所覆蓋;以及以該封裝層為硬罩幕,除去該周邊接墊區內的絕緣保護層,暴露出該些導電墊。
- 如申請專利範圍第10項所述之晶片封裝體的製造方法,其中除去該絕緣保護層的步驟包括蝕刻製程。
- 如申請專利範圍第10項所述之晶片封裝體的製造方法,其中該絕緣保護層與該晶片保護層的材料不同。
- 如申請專利範圍第12項所述之晶片封裝體的製造方法,其中該晶片保護層的材料包括氮化矽,該絕緣保護層的材料包括氧化矽。
- 如申請專利範圍第10項所述之晶片封裝體的製造方法,其中該絕緣保護層的材料包括光阻絕緣材料。
- 如申請專利範圍第10項至第14項任一項所述之晶片封裝體的製造方法,更包括形成一間隔層於該封裝層與該絕緣保護層之間,及形成一間隙於該封裝層與該絕緣保護層之間,其中該間隙被該間隔層所圍繞。
- 如申請專利範圍第15項所述之晶片封裝體的製造方法,其更包括對該光阻絕緣材料進行曝光,且其於該間隔層下方區域之曝光程度小於其他區域。
- 如申請專利範圍第16項所述之晶片封裝體的製造方法,其中該光阻絕緣材料於該間隔層下方區域之硬度大於其他區域。
- 如申請專利範圍第15項所述之晶片封裝體的製造方法,其中該封裝層為一透明基底或一半導體基底。
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US8822325B2 (en) | 2014-09-02 |
US20130316499A1 (en) | 2013-11-28 |
CN102082131B (zh) | 2015-09-09 |
TW201121010A (en) | 2011-06-16 |
US20140332985A1 (en) | 2014-11-13 |
US9799588B2 (en) | 2017-10-24 |
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