CN104241094A - 一种避免超薄硅片边缘破损的加工方法 - Google Patents

一种避免超薄硅片边缘破损的加工方法 Download PDF

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CN104241094A
CN104241094A CN201410312414.8A CN201410312414A CN104241094A CN 104241094 A CN104241094 A CN 104241094A CN 201410312414 A CN201410312414 A CN 201410312414A CN 104241094 A CN104241094 A CN 104241094A
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silicon chip
silicon wafer
groove
thinning
diaphragm
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杨凡力
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Shanghai Zhen Xin Microelectronics Science And Technology Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • 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
    • H01L21/02002Preparing wafers
    • H01L21/02005Preparing bulk and homogeneous wafers
    • H01L21/02008Multistep processes
    • H01L21/0201Specific process step
    • H01L21/02013Grinding, lapping
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/683Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L21/6835Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/683Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L21/6835Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
    • H01L21/6836Wafer tapes, e.g. grinding or dicing support tapes

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)

Abstract

本发明公开的一种避免超薄硅片边缘破损的加工方法,其特征在于,具体包括如下步骤:(1)在需要减薄的硅片边缘加工出一槽,所述槽的槽口位于硅片的表面;(2)在加工有槽的硅片的表面贴一保护膜,所述保护膜跨过所述槽;或者加工有槽的硅片的表面贴在另一硅片上;(3)研磨所述硅片的背面对所述硅片进行减薄处理,减薄至规定厚度;(4)撕去硅片表面的保护膜,得到符合要求的减薄后的硅片;或者将减薄后的硅片与另一硅片分离得到符合的减薄后的硅片。本发明与现有技术相比,具有以下优点:1、加工简单;2、易于贴膜;3、且硅片后续的加工工艺和传统的方法兼容。

Description

一种避免超薄硅片边缘破损的加工方法
技术领域
本发明涉及硅片的加工技术领域,特别涉及一种避免超薄硅片边缘破损的加工方法。
背景技术
在硅片减薄工艺中,特别是在超薄硅片加工过程中,硅片边缘非常容易破裂。其原因是减薄后,硅片边缘非常锋利,所以特别容易破损。
为了防止在超薄硅片加工过程中硅片的边缘破裂,参见图1至图4,目前的方法是首先研磨硅片2的表面3的边缘13(参见图1和2),然后将表面边缘研磨好的硅片2的表面3采用胶黏剂24粘贴到另一块硅片4的表面26上,最后研磨掉硅片3的背面5得到边缘整齐的硅片2。该方法工艺复杂,且对于边缘研磨后的硅片2表面贴膜也是一个问题。
发明内容
本发明所要解决的技术问题在于针对上述为了防止在超薄硅片加工过程中硅片的边缘破裂所采用的加工方法所存在的问题而提供一种工艺简单的避免超薄硅片边缘破损的加工方法。
本发明所要解决的技术问题可以通过以下技术方案来实现:
一种避免超薄硅片边缘破损的加工方法,具体包括如下步骤:
(1)在需要减薄的硅片边缘加工出一槽,所述槽的槽口位于硅片的表面;
(2)在加工有槽的硅片的表面贴一保护膜,所述保护膜跨过所述槽;或者加工有槽的硅片的表面贴在另一硅片上;
(3)研磨所述硅片的背面对所述硅片进行减薄处理,减薄至规定厚度;
(4)撕去硅片表面的保护膜,得到符合要求的减薄后的硅片;或者将减薄后的硅片与另一硅片分离得到符合的减薄后的硅片。
在本发明的一个优选实施例中,所述槽的深度大于减薄后硅片的厚度,在撕去硅片表面的保护膜时,所述保护膜带走所述槽外侧的硅片边缘。
在本发明的一个优选实施例中,所述槽的深度小于减薄后硅片的厚度,研磨掉所述槽外侧的硅片边缘后再撕去硅片表面的保护膜或者将将减薄后的硅片与另一硅片分离。
在本发明的一个优选实施例中,所述槽采用激光切割方法、砂轮切割方法、等离子刻蚀方法、化学品湿法腐蚀方法中的一种或者任意两种以上的组合加工而成。
由于采用了如上的技术方案,本发明与现有技术相比,具有以下优点:1、加工简单;2、易于贴膜;3、且硅片后续的加工工艺和传统的方法兼容。
附图说明
图1至图4为现有硅片加工方法示意图。
图5为本发明加工有深度大于减薄后硅片的厚度的槽的未减薄硅片结构示意图。
图6为本发明加工有槽的未减薄硅片贴膜后的示意图。
图7为本发明加工有槽的并贴有贴膜的减薄后硅片的示意图。
图8为本发明成品硅片结构结构示意图。
图9为本发明加工有深度小于减薄后硅片的厚度的槽并贴有贴膜的减薄后硅片的示意图。
具体实施方式
一种避免超薄硅片边缘破损的加工方法,具体包括如下步骤:
(1)参见图5,在需要减薄的硅片100的边缘加工出一深度大于减薄后硅片的厚度的槽110,槽110的槽口位于硅片100的表面120。
(2)参见图6,在加工有槽110的硅片100的表面120贴一保护膜200,保护膜200跨过槽110;
(3)参见图7,研磨硅片100的背面130对硅片100进行减薄处理,减薄至规定厚度;
(4)撕去硅片100表面的保护膜200,在撕去硅片100表面的保护膜200时,保护膜200带走槽110外侧的硅片边缘130,得到符合要求的减薄后的硅片;
上述步骤(2)也可以采用如下方法取代:加工有槽110的硅片100的表面120贴在另一硅片上。上述步骤(4)也可以采用如下方法取代:将减薄后的硅片100与另一硅片分离得到符合的减薄后的硅片。
另外参见图9,也可以在需要减薄的硅片100的边缘加工出一深度小于减薄后硅片的厚度的槽110a,槽110a的槽口位于硅片100的表面120,在加工有槽110a的硅片100的表面120贴一保护膜200,保护膜200跨过槽110。
上述槽110或100a采用激光切割方法、砂轮切割方法、等离子刻蚀方法、化学品湿法腐蚀方法中的一种或者任意两种以上的组合加工而成。

Claims (4)

1.一种避免超薄硅片边缘破损的加工方法,其特征在于,具体包括如下步骤:
(1)在需要减薄的硅片边缘加工出一槽,所述槽的槽口位于硅片的表面;
(2)在加工有槽的硅片的表面贴一保护膜,所述保护膜跨过所述槽;或者加工有槽的硅片的表面贴在另一硅片上;
(3)研磨所述硅片的背面对所述硅片进行减薄处理,减薄至规定厚度;
(4)撕去硅片表面的保护膜,得到符合要求的减薄后的硅片;或者将减薄后的硅片与另一硅片分离得到符合的减薄后的硅片。
2.如权利要求1所述的避免超薄硅片边缘破损的加工方法,其特征在于,所述槽的深度大于减薄后硅片的厚度,在撕去硅片表面的保护膜时,所述保护膜带走所述槽外侧的硅片边缘。
3.如权利要求1所述的避免超薄硅片边缘破损的加工方法,其特征在于,所述槽的深度小于减薄后硅片的厚度,研磨掉所述槽外侧的硅片边缘后再撕去硅片表面的保护膜或者将将减薄后的硅片与另一硅片分离。
4.如权利要求1所述的避免超薄硅片边缘破损的加工方法,其特征在于,所述槽采用激光切割方法、砂轮切割方法、等离子刻蚀方法、化学品湿法腐蚀方法中的一种或者任意两种以上的组合加工而成。
CN201410312414.8A 2014-10-08 2014-10-08 一种避免超薄硅片边缘破损的加工方法 Pending CN104241094A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10727128B2 (en) 2018-02-14 2020-07-28 Disco Corporation Method of processing a wafer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10727128B2 (en) 2018-02-14 2020-07-28 Disco Corporation Method of processing a wafer

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