TW202032640A - 裝置晶片的製造方法 - Google Patents
裝置晶片的製造方法 Download PDFInfo
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- 238000005530 etching Methods 0.000 claims abstract description 29
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- 229910002601 GaN Inorganic materials 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
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Abstract
本發明的課題是不使被配設於晶圓的黏晶用樹脂變質,藉由電漿蝕刻來分割該晶圓。
其解決手段,為一種將形成有裝置的晶圓分割之裝置晶片的製造方法,具備:
黏晶用樹脂配設步驟,其係將液狀的黏晶用樹脂供給至該晶圓的背面側;
水溶性樹脂配設步驟,其係以水溶性樹脂來覆蓋該黏晶用樹脂;
雷射加工步驟,其係從該晶圓的該背面側照射對於該晶圓具有吸收性的波長的雷射束,沿著分割預定線來除去該黏晶用樹脂與該水溶性樹脂;
蝕刻步驟,其係一面以該水溶性樹脂來保護該黏晶用樹脂,一面蝕刻露出於該晶圓的該背面側的部分,將該晶圓分割成裝置晶片;及
水溶性樹脂除去步驟,其係將水供給至該晶圓的該背面側而除去該水溶性樹脂,取得附該黏晶用樹脂的裝置晶片。
Description
本發明是有關將晶圓分割而製造配設有作為晶粒黏結薄膜(DAF(Die Attach Film))機能的黏晶用樹脂的裝置晶片之裝置晶片的製造方法。
搭載裝置的裝置晶片是藉由將表面形成有複數的裝置的晶圓按每個該裝置分割而形成。近年來,搭載裝置晶片的電子機器的小型化或薄型化的傾向顯著,對於裝置晶片的薄化的要求提高。於是,在分割晶圓之前從背面側研削晶圓而將晶圓薄化,藉由分割被薄化的晶圓來製造薄型的裝置晶片。
作為分割晶圓的方法,是有邊使具有圓環狀的切刃的切削刀刃旋轉,邊沿著分割預定線來使切入晶圓而切削加工該晶圓的方法,或沿著分割預定線來照射雷射束至該晶圓而雷射加工該晶圓的方法為人所知。被形成的裝置晶片是被安裝於預定的安裝對象而使用。
藉由該等的加工來分割晶圓時,有時在被形成的裝置晶片的切斷面或端部產生缺口或結晶的變形等。一旦在裝置晶片產生缺口或結晶的變形,則發生該裝置晶片的抗折強度降低的問題。於是,在研削晶圓而薄化之前,將沿著分割預定線的溝形成於晶圓,然後藉由薄化晶圓來分割晶圓的技術被開發。
進一步,為了提高裝置晶片的抗折強度,藉由電漿蝕刻來分割晶圓的技術被開發(參照專利文獻1)。該技術是在晶圓的表面或背面形成抗蝕膜,部分地除去該抗蝕膜(圖案化)而沿著分割預定線來使晶圓露出,將蝕刻劑氣體電漿化而使作用於晶圓的露出的部分。然後,全部除去抗蝕膜。此情況,抗蝕膜的形成、圖案化及抗蝕膜的除去花費成本。
可是,為了裝置晶片的安裝面積的省面積化或高集成化,使複數的裝置晶片層疊而封裝化的技術被開發。若在各裝置晶片預先配設被稱為晶粒黏結薄膜(DAF)的黏著薄膜,經由DAF來互相貼附各裝置晶片,則可形成封裝。另外,DAF是在將單層的裝置晶片安裝於預定的安裝對象時也有用。附DAF的裝置晶片是在晶圓貼附DAF,藉由與晶圓一起分割DAF而可取得。
但,被薄化的晶圓因為強度降低,所以在該晶圓貼附DAF時,若使用滾輪等來將DAF推壓於晶圓,則恐有產生損傷之虞。進一步將DAF與晶圓一起以切削刀刃來切斷時,在DAF產生大的毛邊。於是,藉由旋轉塗佈法來將液狀的黏晶用樹脂塗佈於晶圓,將黏晶用樹脂固化,連同黏晶用樹脂一起分割晶圓的技術被開發(參照專利文獻2)。被固化的黏晶用樹脂是作為DAF機能。
[先前技術文獻]
[專利文獻]
[專利文獻1] 日本特許第4447325號公報
[專利文獻2] 日本特許第5384972號公報
(發明所欲解決的課題)
在晶圓塗佈液狀的黏晶用樹脂而使固化之後,若可藉由電漿蝕刻來分割該晶圓,則可有效率地製造附黏晶用樹脂的裝置晶片。例如,若將被配設於晶圓的黏晶用樹脂圖案化而可作為抗蝕膜利用,則不須另外準備抗蝕膜。而且,黏晶用樹脂是被作為DAF使用,因此也不須除去作為抗蝕膜使用的黏晶用樹脂。
然而,若將配設有黏晶用樹脂的晶圓搬入至電漿蝕刻裝置的處理腔室,在被排氣的該處理腔室內將蝕刻劑氣體電漿化而使作用於該晶圓,則黏晶用樹脂會變質。由於變質的黏晶用樹脂是作為DAF的性能會受損,因此在將被形成的裝置晶片貼附於預定的對象時,無法適當地實施貼附,恐有黏著不良之虞。
本發明是有鑑於如此的問題點而研發者,其目的是在於提供一種藉由電漿蝕刻來分割晶圓而形成裝置晶片時,被配設於晶圓的黏晶用樹脂的變質會被抑制之裝置晶片的製造方法。
(用以解決課題的手段)
若根據本發明之一形態,則可提供一種裝置晶片的製造方法,係分割晶圓的裝置晶片的製造方法,該晶圓係於表面設定有互相交叉的複數的分割預定線,在藉由該表面的該分割預定線所區劃的各區域形成有裝置,其特徵為具備:
保護構件配設步驟,其係將保護構件配設於該晶圓的該表面側;
黏晶用樹脂配設步驟,其係該保護構件配設步驟之後,將液狀的黏晶用樹脂供給至該晶圓的背面側,使該黏晶用樹脂固化;
水溶性樹脂配設步驟,其係該黏晶用樹脂配設步驟之後,將液狀的水溶性樹脂供給至被固化的該黏晶用樹脂的表面,以該水溶性樹脂來覆蓋該黏晶用樹脂;
雷射加工步驟,其係該水溶性樹脂配設步驟之後,從該晶圓的該背面側照射對於該晶圓具有吸收性的波長的雷射束,沿著該分割預定線來除去該黏晶用樹脂與該水溶性樹脂而使該晶圓的該背面沿著該分割預定線來部分地露出;
蝕刻步驟,其係該雷射加工步驟之後,將電漿狀態的蝕刻氣體供給至該晶圓的該背面側,一面以該水溶性樹脂來保護該黏晶用樹脂,一面蝕刻露出於該晶圓的該背面側的部分,將該晶圓分割成裝置晶片;及
水溶性樹脂除去步驟,其係該蝕刻步驟之後,將水供給至該晶圓的該背面側而除去該水溶性樹脂,取得附該黏晶用樹脂的裝置晶片。
理想是在該黏晶用樹脂配設步驟之前,具備研削該晶圓的該背面而將該晶圓薄化至該裝置晶片的預定的完工厚度為止之研削步驟。
[發明的效果]
本發明之一形態的裝置晶片的製造方法是在實施蝕刻步驟之前,以水溶性樹脂來覆蓋被形成於晶圓的背面的黏晶用樹脂。而且,藉由雷射束來沿著分割預定線雷射加工而使晶圓的背面側部分地露出之後,電漿蝕刻晶圓的背面的露出的部分而分割晶圓。
此情況,實施電漿蝕刻時,黏晶用樹脂與水溶性樹脂會成為一體而作為抗蝕膜機能來保護晶圓的分割預定線以外的部分,且該水溶性樹脂會保護黏晶用樹脂。因此,黏晶用樹脂的變質會被防止。然後,若以水來洗淨晶圓而除去水溶性樹脂,則可取得在背面側配設有黏晶用樹脂的裝置晶片。
因此,依據本發明,可提供一種藉由電漿蝕刻來分割晶圓而形成裝置晶片時,被配置於晶圓的黏晶用樹脂的變質會被抑制之裝置晶片的製造方法。
參照附圖來說明有關本發明的實施形態。在本實施形態的裝置晶片的製造方法中,藉由電漿蝕刻來分割在表面形成有複數的裝置的晶圓,藉此製造裝置晶片。
圖1(A)是模式性地表示包含以本實施形態的裝置晶片的製造方法來加工的晶圓1之框單元11的立體圖。首先,說明有關被加工物的晶圓1。另外,在圖1(A)是晶圓1的背面1b會被顯示於上方。在圖1(A)中,被形成於表面1a無法從背面1b側視認的構造物等會藉由虛線來表示。
晶圓1是例如由Si(矽)、SiC(碳化矽)、GaN(氮化鎵)、GaAs(砷化鎵)、或其他的半導體等的材料、或藍寶石、玻璃、石英等的材料所成的大致圓板狀的基板等。該玻璃是例如鹼玻璃、無鹼玻璃、鈉鈣玻璃、鉛玻璃、硼矽酸鹽玻璃、石英玻璃等。
在晶圓1的表面1a是設定有互相交叉的複數的分割預定線3而區劃。並且,在以晶圓1的表面1a的分割預定線3所區劃的各區域是形成有IC(Integrated Circuit)、LSI(Large-Scale Integrated circuit)、LED(Light Emitting Diode)等的裝置5。在本實施形態的裝置晶片的製造方法中,藉由電漿蝕刻來沿著分割預定線3而分割晶圓1,形成搭載裝置5的各個的裝置晶片。
其次,說明有關本實施形態的裝置晶片的製造方法的各步驟。在該製造方法中,首先,實施在晶圓1的表面1a側配設保護構件的保護構件配設步驟S1。在圖1(A)是顯示在表面1a側配設有保護構件7的晶圓1。
保護構件7是例如具有比晶圓1的直徑更大的直徑之黏著膠帶,該保護構件7的黏著面會被貼附於晶圓1的表面1a。保護構件7的素材是只要為對後述的電漿蝕刻處理及藉由包括水的洗淨液的洗淨具有耐性的素材即可,並無特別加以制限。
在該保護構件7的外周部是亦可貼附有以金屬等所形成的環狀的框9。此情況,首先,以能將晶圓1(將表面1a側朝向上方)定位於框9的開口的中央之方式,使框9及晶圓1載於預定的台面上,其次,以能覆蓋框9及晶圓1的上方之方式,將保護構件7貼附於框9及晶圓1。
若如此將晶圓1、保護構件7及框9一體化,則可形成框單元11。若形成框單元11,則在以後的步驟中可經由保護構件7及框9來處理晶圓1,因此晶圓1的處理容易。又,由於藉由分割晶圓1而形成的各個的裝置晶片是經由保護構件7來被框9支撐,因此裝置晶片的處理也容易。
圖1(B)是擴大被實施保護構件配設步驟S1而在表面1a配設有保護構件7的晶圓1來模式性地表示的剖面圖。如圖1(A)及圖1(B)所示般,若實施保護構件配設步驟S1,則可用保護構件7來保護晶圓1的表面1a側,晶圓1的背面1b側被露出於上方。
另外,在擴大晶圓1來模式性地表示的圖1(B)等的剖面圖中,省略被形成於與晶圓1的表面1a的分割預定線3重疊的區域的構造物。例如,在晶圓1的表面1a的裝置5之間是亦可形成有被使用在裝置5的層間絕緣膜或配線層,或亦可形成有TEG(Test Element Group)。在分割晶圓1時,該等的構造物會與晶圓1一起被除去。
在本實施形態的裝置晶片的製造方法中,在晶圓1的背面1b配設黏晶用樹脂之前,為了將晶圓1薄化成預定的厚度,亦可實施研削晶圓1的背面1b的研削步驟S2。圖2是模式性表示研削步驟S2的剖面圖。在圖2是顯示被實施研削步驟S2時的晶圓1等的剖面圖。
說明有關被實施研削步驟S2的研削裝置2。該研削裝置2是具備:保持被加工物的晶圓1的保持台4,及研削被保持於該保持台4的晶圓1的研削單元6。保持台4是例如在上面具備多孔質構件,在內部具備一端被連接至該多孔質構件的吸引路。該吸引路的另一端是連接吸引源。在保持台4的上面的外周是設有把持框9的複數的夾緊裝置4a。
在研削晶圓1時,將晶圓1的表面1a側朝向下方,經由保護構件7來將晶圓1載於保持台4的上面,藉由夾緊裝置4a來使把持框9。然後,使該吸引源作動而經由該吸引路及該多孔質構件來使負壓作用於晶圓1,使晶圓1吸引保持於保持台4。亦即,保持台4的該上面是成為吸附面。另外,保持台4是可繞著沿著與該保持面垂直的方向的軸旋轉。
被配置於保持台4的上方的研削單元6是具備:沿著與保持台4的保持面垂直的方向的主軸8,及被配置於主軸8的下端的輪固定件10。主軸8是連接使該主軸8繞者沿著該垂直的方向的軸旋轉的馬達等的旋轉驅動源。在輪固定件10的下面是固定研削輪12。在該研削輪12的外周部的下面是安裝有複數的研削砥石12a。
該研削砥石12a是具有:鑽石等的微小的砥粒,及分散保持該砥粒的結合材。一旦使主軸8旋轉,則研削輪12會旋轉,研削砥石12a會移動於旋轉軌道上。研削裝置2是以該旋轉軌道會包含保持台4的保持面的中央上方之方式,調整研削單元6與保持台4的水平方向的相對的位置關係。
在研削步驟S2中,使晶圓1吸引保持於保持台4,使晶圓1的背面1b側露出於上方。其次,使保持台4及主軸8旋轉,使研削單元6下降。一旦移動於旋轉軌道上的研削砥石12a的下面接觸於晶圓1的背面1b,則晶圓1會被研削而薄化。然後,使研削單元6下降至晶圓1形成預定的完工厚度為止。在此,所謂該預定的完工厚度是例如晶圓1被分割而形成的裝置晶片的完工厚度。
另外,研削步驟S2是亦可在比保護構件配設步驟S1更前面實施。此情況,在晶圓1的表面1a側預先貼附具有與晶圓1同程度的直徑的保護膠帶,一面以該保護膠帶來保護晶圓1的表面1a側,一面實施研削步驟S2。然後,剝離該保護膠帶,實施保護構件配設步驟S1來將晶圓1、保護構件7及框9一體化而形成框單元11,以保護構件7來保護該晶圓1的表面1a側。
另外,一旦晶圓1藉由研削步驟S2而被薄化,則晶圓1的強度會降低,因此在使該保護膠帶從晶圓1的表面1a剝離時,預先在背面1b側貼附膠帶狀的支持構件為佳。此情況,其後實施保護構件配設步驟S1之後,從晶圓1的背面1b剝離該支持構件。
在本實施形態的裝置晶片的製造方法中,其次,實施:供給液狀的黏晶用樹脂至晶圓1的背面1b側,使該黏晶用樹脂固化的黏晶用樹脂配設步驟S3。圖3(A)是模式性地表示黏晶用樹脂配設步驟S3的剖面圖。在圖3(A)是顯示晶圓1等的剖面圖。
在黏晶用樹脂配設步驟S3是例如使用圖3(A)所示的塗佈裝置14。塗佈裝置14是具備:保持晶圓1的保持台16,及將液狀的黏晶用樹脂20吐出至被保持於該保持台16上的晶圓1的吐出噴嘴18。
在保持台16的上面的外周部是設有把持包含晶圓1的框單元11的框9之複數的夾緊裝置16a。吐出噴嘴18是具有朝向下方的吐出口(未圖示),可邊從該吐出口吐出液狀的黏晶用樹脂,移動於通過保持台16的中央上方的軌道。
在黏晶用樹脂配設步驟S3中,首先,將晶圓1的表面1a側朝向下方而經由保護構件7來使載於保持台16上。其次,使保持台16繞著沿著與上面垂直的方向的軸高速旋轉。而且,一面從吐出噴嘴18以預定的滴下速度來將液狀的黏晶用樹脂20滴下至晶圓1的背面1b,一面以通過晶圓1的背面1b的中央上方的路徑來使該吐出噴嘴18往復移動於水平方向。
配設在晶圓1的背面1b側的黏晶用樹脂13的厚度是可藉由使從吐出噴嘴18滴下的液狀的黏晶用樹脂的量或保持台16的旋轉速度來調節。又,黏晶用樹脂13是亦可藉由網版印刷法來供給至晶圓1的背面1b側,或亦可藉由使離心力作用來被平坦化於背面1b上而配設。
其次,使被供給至晶圓1的背面1b側的液狀的黏晶用樹脂13固化。圖3(B)是擴大使被供給至晶圓1的背面1b側的液狀的黏晶用樹脂13固化的樣子來模式性地表示的剖面圖。例如,若黏晶用樹脂13為藉由紫外線的照射來固化的材料,則黏晶用樹脂13的固化可藉由照射紫外線22來實施。或,亦可藉由加熱黏晶用樹脂13來固化黏晶用樹脂13。
另外,黏晶用樹脂13的固化是亦可使晶圓1移動至具備可將紫外線22照射至黏晶用樹脂13的紫外線照射單元之紫外線照射裝置來實施。或,亦可使晶圓1移動至具有熱源,具備可加熱晶圓1的加熱單元之加熱裝置來實施。或,塗佈裝置14亦可具有該紫外線照射單元或加熱單元,此情況,黏晶用樹脂13的固化會在塗佈裝置14的保持台16上被實施。
又,黏晶用樹脂13是亦可藉由複數的被層疊的黏晶用樹脂所構成。此情況,將第1黏晶用樹脂塗佈於晶圓1的背面1b側固化之後,使第2黏晶用樹脂塗佈於晶圓1的背面1b側而固化。藉由如此接連地使黏晶用樹脂層疊,可在晶圓1的背面1b側形成預定的厚度的黏晶用樹脂13。
不根據本實施形態的裝置晶片的製造方法來將晶粒黏結薄膜(DAF)貼附於晶圓1的背面1b側時,在使用滾輪等來將DAF朝向晶圓1推壓時,晶圓1恐有破損之虞。特別是被實施研削步驟S2而薄化的晶圓1因為強度降低,所以容易產生破損。
相對於此,將液狀的黏晶用樹脂13供給至晶圓1的背面1b側,使該黏晶用樹脂13固化時,因為施加於晶圓1的負荷比較小,所以在晶圓1不易產生損傷。因此,若根據本實施形態的裝置晶片的製造方法,則可不使損傷產生於晶圓1,將可作為DAF機能的黏晶用樹脂13配設於晶圓1的背面1b側。
在本實施形態的裝置晶片的製造方法中,其次,實施:將液狀的水溶性樹脂供給至被固化的黏晶用樹脂13的表面,以該水溶性樹脂來覆蓋該黏晶用樹脂13的水溶性樹脂配設步驟S4。圖4(A)是模式性地表示水溶性樹脂配設步驟S4的剖面圖。在圖4(A)是模式性地表示被供給水溶性樹脂的晶圓1的剖面。
水溶性樹脂配設步驟S4是例如亦可在被實施黏晶用樹脂配設步驟S3的塗佈裝置14接續於黏晶用樹脂配設步驟S3而實施。或,亦可將晶圓1移設至與塗佈裝置14同樣構成的其他的塗佈裝置而實施。在同一的塗佈裝置14實施黏晶用樹脂配設步驟S3及水溶性樹脂配設步驟S4時,例如亦可使用與被使用在液狀的黏晶用樹脂20的供給的吐出噴嘴18不同的吐出噴嘴18a。
在水溶性樹脂配設步驟S4中,與黏晶用樹脂配設步驟S3同樣地使保持晶圓1的保持台16繞著沿著與上面垂直的方向的軸高速旋轉。然後,使液狀的水溶性樹脂20a從吐出噴嘴18a以預定的滴下速度來滴下至晶圓1的背面1b。於是,水溶性樹脂15會被配設於晶圓1的背面1b。
圖4(B)是將實施水溶性樹脂配設步驟S4之後的晶圓1擴大來模式性地表示的剖面圖。如圖4(B)所示般,若實施水溶性樹脂配設步驟S4,則由於黏晶用樹脂13會藉由水溶性樹脂15所覆蓋,因此在後述的蝕刻步驟中,黏晶用樹脂13會被水溶性樹脂15所保護。另外,該水溶性樹脂15是例如可使用Disco Corporation製的“HOGOMAX (註冊商標)”系列。
水溶性樹脂配設步驟S4之後,實施:沿著分割預定線3來除去黏晶用樹脂13與水溶性樹脂15而使晶圓1的背面1b沿著分割預定線3來部分地露出的雷射加工步驟S5。圖5(A)是擴大被實施雷射加工步驟S5的晶圓1來模式性地表示的剖面圖。
雷射加工步驟S5是被實施於具備:保持晶圓1的保持台,及被配置於該保持台的上方的雷射加工單元之雷射加工裝置。該雷射加工單元是可振盪對於晶圓1具有吸收性(晶圓1可吸收)的波長的雷射,可將雷射束22a集光於晶圓1的背面1b。該雷射加工單元與該保持台是可相對地移動於水平方向。
在雷射加工步驟S5中,首先,使晶圓1載於該雷射加工裝置的該保持台上。而且,藉由雷射加工單元來使雷射束22a集光於晶圓1的背面1b,藉由使晶圓1及雷射束22a相對移動於水平方向,沿著分割預定線3來將雷射束22a照射於晶圓1。
一旦雷射束22a到達晶圓1的背面1b,則雷射束22a會被晶圓1吸收,晶圓1會被燒蝕加工。圖5(B)是擴大被加工的晶圓1來模式性地表示的剖面圖。如圖5(B)所示般,藉由雷射束22a在晶圓1的背面1b側形成沿著分割預定線3的加工溝17,且在與該加工溝17重疊的區域中,黏晶用樹脂13及水溶性樹脂15會被除去。
若實施雷射加工步驟S5來將沿著分割預定線3的加工溝17形成於晶圓1的背面1b側,則晶圓1的背面1b會被露出於該加工溝17的底。在其次實施的蝕刻步驟中,晶圓1的露出之處會被蝕刻。
一旦雷射加工晶圓1,則被除去的晶圓1、黏晶用樹脂13及水溶性樹脂15會飛散於晶圓1的背面1b上,附著於該水溶性樹脂15上。然而,水溶性樹脂15是在後述的水溶性樹脂除去步驟中被除去。因此,附著於水溶性樹脂15的附著物是連通水溶性樹脂15一起被除去,不殘留於被形成的裝置晶片,所以使用黏晶用樹脂13來將該裝置晶片安裝於預定的對象時,不會發生該附著物所造成的黏著不良。
其次,在本實施形態的裝置晶片的製造方法中,實施蝕刻步驟S6。在蝕刻步驟S6中,將電漿狀態的蝕刻氣體供給至晶圓1的背面1b側,蝕刻露出於晶圓1的背面1b側的部分而將晶圓1分割成裝置晶片。亦即,在蝕刻步驟S6中,在藉由雷射加工步驟S5所形成的加工溝17的底部蝕刻晶圓1而分割晶圓1。
蝕刻步驟S6是藉由具備處理室的電漿蝕刻裝置(未圖示)來實施。在該處理室的內部是被連接至高頻電源的一對的電極會被配置成相對面於上下方向。下方的該高頻電極是被收容於保持晶圓1的保持台的內部,在該保持台是配設有冷卻晶圓1的冷卻機構。
在實施蝕刻步驟S6時,使晶圓1載於該電漿蝕刻裝置的該處理室的內部的保持台上,吸引處理室的內部來將內部的空氣排氣。然後,將蝕刻劑氣體導入至該處理室的內部,且藉由該高頻電源來將高頻的電壓施加於該一對的電極。於是,蝕刻劑氣體會在該保持台附近被電漿化,被電漿化的蝕刻劑氣體會作用於晶圓1的露出部分,晶圓1被蝕刻。
另外,與被形成於晶圓1的背面1b側的加工溝17的寬度作比較,晶圓1大幅度厚時,在蝕刻晶圓1的期間,晶圓1的壁面恐有因蝕刻而大損傷之虞。於是,亦可使晶圓1的蝕刻某程度進行之後,形成保護被形成的該壁面的保護膜,然後再開始蝕刻。而且,亦可重複晶圓1的加工溝17的底部的蝕刻及壁面的保護來朝向晶圓1的表面1a來挖進晶圓1。
在此,作為蝕刻劑氣體是例如使用六氟化硫(SF6
)等。並且,在藉由蝕刻而露出的晶圓1的壁面形成保護膜時,是例如使C4
F8
等的氣體作用於該壁面而形成保護膜。
圖5(C)是擴大被實施蝕刻步驟S6的晶圓1來模式性地表示的剖面圖。如圖5(C)所示般,若藉由蝕刻步驟S6,沿著分割預定線3來形成底部到達被配設於晶圓1的表面1a的保護構件7之加工溝19,則晶圓1會被分割而形成裝置晶片。被形成的各個的裝置晶片是經由被貼附於晶圓1的表面1a的保護構件7來藉由框9所支撐。
另外,實施蝕刻步驟S6的期間,由於被配設於晶圓1的背面1b側的黏晶用樹脂13是藉由水溶性樹脂15來保護,因此不易在黏晶用樹脂13發生變質等。亦即,藉由被水溶性樹脂15保護,黏晶用樹脂13的作為DAF的機能不會喪失。
在本實施形態的裝置晶片的製造方法中,其次,實施:供給水至晶圓1的背面1b側而除去水溶性樹脂15,取得附黏晶用樹脂13的裝置晶片之水溶性樹脂除去步驟S7。圖6是模式性地表示水溶性樹脂除去步驟S7的剖面圖。水溶性樹脂除去步驟S7是例如以圖6所示的洗淨裝置24來實施。
洗淨裝置24是具備:
保持台26,其係經由保護構件7來保持從晶圓1形成的各個的裝置晶片1c;及
吐出噴嘴28,其係吐出洗淨液30至被保持於該保持台26上的裝置晶片1c。
在保持台26的上面的外周部是設有把持被貼附於保護構件7的外周部的框9之複數的夾緊裝置26a。吐出噴嘴28是具有朝向下方的吐出口(未圖示),邊從該吐出口吐出洗淨液30,邊移動於通過保持台26的中央上方的軌道。另外,例如該洗淨液30為純水,或亦可為混合高壓空氣與純水的混合流體。
在水溶性樹脂除去步驟S7中,首先,使從晶圓1形成的裝置晶片1c載於保持台26上,使框9把持於夾緊裝置26a。其次,使保持台26繞著沿著與上面垂直的方向的軸旋轉。而且,一面從吐出噴嘴28以預定的滴下速度來使洗淨液30噴射至保持台26上,一面以通過保持台26的中央上方的路徑來使吐出噴嘴28往復移動於水平方向。
一旦將洗淨液30供給至裝置晶片1c的背面側,則水溶性樹脂15會被除去,可取得附黏晶用樹脂13的裝置晶片1c。留在保護構件7上的各個的裝置晶片1c是之後從保護構件7拾取而經由該黏晶用樹脂13來被貼附於預定的對象。從保護構件7拾取裝置晶片1c時,為了使作業形成容易,亦可將保護構件7擴張至外周方向而擴大各裝置晶片1c間的距離。
如以上說明般,若根據本實施形態的裝置晶片的製造方法,則可製造在背面側配設有黏晶用樹脂13的裝置晶片1c。因為藉由電漿蝕刻來分割晶圓1,所以在裝置晶片1c不易產生缺口或龜裂等的損傷,裝置晶片1c的抗折強度會變高。又,由於在實施電漿蝕刻之前,將水溶性樹脂15配設於黏晶用樹脂13上,因此電漿蝕刻的黏晶用樹脂13的變質會被抑制。
而且,黏晶用樹脂13及水溶性樹脂15會作為電漿蝕刻所必要的抗蝕膜機能,因此不須在晶圓1另外形成抗蝕膜。水溶性樹脂15是藉由含水的洗淨液30來除去,因此不用另外實施洗淨工程,可容易且確實地除去附著於水溶性樹脂15上的附著物。而且,在黏晶用樹脂13是附著物不會殘留,因此在將附黏晶用樹脂13的裝置晶片1c實施於預定的安裝對象時不易發生黏著不良。
另外,本發明是不限於上述實施形態的記載,可實施各種變更。例如,上述實施形態是說明有關在雷射加工步驟S5中藉由雷射束22a來燒蝕加工晶圓1而確實地除去黏晶用樹脂13及水溶性樹脂15的情況,但本發明之一形態是不被限定於此。
例如,亦可只除去黏晶用樹脂13及水溶性樹脂15,在晶圓1的背面1b側不形成溝。但,若無法確實地除去黏晶用樹脂13及水溶性樹脂15,則恐有後述的電漿蝕刻無法適切地實施之虞,因此充分地實施黏晶用樹脂13及水溶性樹脂15的除去為理想。
上述實施形態的構造、方法等是可在不脫離本發明的目的的範圍中適當變更實施。
1:晶圓
1a:表面
1b:背面
1c:裝置晶片
3:分割預定線
5:裝置
7:保護構件
9:框
11:框單元
13:黏晶用樹脂
15:水溶性樹脂
17,19:加工溝
2:研削裝置
4,16,26:保持台
4a,16a,26a:夾緊裝置
6:研削單元
8:主軸
10:輪固定件
12:研削輪
12a:研削砥石
14:塗佈裝置
18,18a,28:吐出噴嘴
20:液狀的黏晶用樹脂
20a:液狀的水溶性樹脂
22:紫外線
22a:雷射束
24:洗淨裝置
30:洗淨液
圖1(A)是模式性地表示包含晶圓的框單元的立體圖,圖1(B)是擴大晶圓來模式性地表示的剖面圖。
圖2是模式性地表示研削步驟的剖面圖。
圖3(A)是模式性地表示黏晶用樹脂配設步驟的剖面圖,圖3(B)是擴大配設有黏晶用樹脂的晶圓來模式性地表示的剖面圖。
圖4(A)是模式性地表示水溶性樹脂配設步驟的剖面圖,圖4(B)是擴大配設有水溶性樹脂的晶圓來模式性地表示的剖面圖。
圖5(A)是擴大被實施雷射加工步驟時的晶圓來模式性地表示的剖面圖,圖5(B)是擴大藉由雷射加工步驟來形成加工溝的晶圓而模式性地表示的剖面圖,圖5(C)是擴大被實施蝕刻步驟而分割的晶圓來模式性地表示的剖面圖。
圖6是模式性地表示水溶性樹脂除去步驟的剖面圖。
1:晶圓
1a:表面
1b:背面
3:分割預定線
5:裝置
7:保護構件
9:框
13:黏晶用樹脂
14:塗佈裝置
15:水溶性樹脂
16:保持台
16a:夾緊裝置
18a:吐出噴嘴
20a:液狀的水溶性樹脂
Claims (2)
- 一種裝置晶片的製造方法,係分割晶圓的裝置晶片的製造方法,該晶圓係於表面設定有互相交叉的複數的分割預定線,在藉由該表面的該分割預定線所區劃的各區域形成有裝置,其特徵為具備: 保護構件配設步驟,其係將保護構件配設於該晶圓的該表面側; 黏晶用樹脂配設步驟,其係該保護構件配設步驟之後,將液狀的黏晶用樹脂供給至該晶圓的背面側,使該黏晶用樹脂固化; 水溶性樹脂配設步驟,其係該黏晶用樹脂配設步驟之後,將液狀的水溶性樹脂供給至被固化的該黏晶用樹脂的表面,以該水溶性樹脂來覆蓋該黏晶用樹脂; 雷射加工步驟,其係該水溶性樹脂配設步驟之後,從該晶圓的該背面側照射對於該晶圓具有吸收性的波長的雷射束,沿著該分割預定線來除去該黏晶用樹脂與該水溶性樹脂而使該晶圓的該背面沿著該分割預定線來部分地露出; 蝕刻步驟,其係該雷射加工步驟之後,將電漿狀態的蝕刻氣體供給至該晶圓的該背面側,一面以該水溶性樹脂來保護該黏晶用樹脂,一面蝕刻露出於該晶圓的該背面側的部分,將該晶圓分割成裝置晶片;及 水溶性樹脂除去步驟,其係該蝕刻步驟之後,將水供給至該晶圓的該背面側而除去該水溶性樹脂,取得附該黏晶用樹脂的裝置晶片。
- 如申請專利範圍第1項之裝置晶片的製造方法,其中,在該黏晶用樹脂配設步驟之前,具備研削該晶圓的該背面而將該晶圓薄化至該裝置晶片的預定的完工厚度為止之研削步驟。
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