CN112038229A - 一种激光卡槽制程后改善工艺 - Google Patents

一种激光卡槽制程后改善工艺 Download PDF

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CN112038229A
CN112038229A CN202010674758.9A CN202010674758A CN112038229A CN 112038229 A CN112038229 A CN 112038229A CN 202010674758 A CN202010674758 A CN 202010674758A CN 112038229 A CN112038229 A CN 112038229A
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laser
angle
doe
improved process
clamping groove
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陈清池
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Guangxi Huaxin Zhenbang Semiconductor Co ltd
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Lianli Xuzhou Semiconductor Co 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
    • H01L21/04Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/30Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
    • H01L21/302Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
    • H01L21/304Mechanical treatment, e.g. grinding, polishing, cutting
    • H01L21/3043Making grooves, e.g. cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36Removing material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36Removing material
    • B23K26/40Removing material taking account of the properties of the material involved
    • B23K26/402Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Laser Beam Processing (AREA)
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Abstract

一种激光卡槽制程后改善工艺,其步骤具体如下:(1).调整DOE的角度,使其与生产的IC形成一定的倾斜角度;(2).在步骤(1)的基础上对IC依次进行Grooving process制程工艺。通过改变DOE与IC之间的角度,从而赋予DOE一个微小角度设定,使晶侧仅受到一个Laser Beam的接触,达到降低热效应对晶侧的影响和保证了晶圆的生产质量的目的。

Description

一种激光卡槽制程后改善工艺
技术领域
本发明涉及晶圆生产加工领域,具体涉及一种激光卡槽制程后改善工艺。
背景技术
在传统技术中,一般都会采用ASM的Laser grooving机台在传统U-shape的模式下使用martix DOE(Diffractive Optical Element)进行Grooving process以可以得到较好的底部平整度。但是此种工艺中,IC晶侧所受到的Laser spot点为2-3个,相对所受的热效应会有所迭加,而热效应除了容易对IC内部线路造成影响,也会在晶侧造成细小裂痕,影响IC强度,造成终端制程的损失。
公开于该背景技术部分的信息仅仅旨在加深对本发明的总体背景技术的理解,而不应当被视为承认或以任何形式暗示该信息构成已为本领域技术人员所公知的现有技术。
发明内容
为解决上述技术问题,本发明提出了一种激光卡槽制程后改善工艺,以达到降低热效应对晶侧的影响和保证了晶圆的生产质量的目的。
为达到上述目的,本发明的技术方案如下:
一种激光卡槽制程后改善工艺,其步骤具体如下:
(1).调整DOE的角度,使其与生产的IC形成一定的倾斜角度;
(2).在步骤(1)的基础上对IC依次进行Grooving process制程工艺。
作为优选的,步骤(1)中主要是通过调节设备上的镭射头的角度来实现。
作为优选的,在步骤(1)中调节完镭射头的角度后,需要对其打出的激光角度进行检测。
本发明具有如下优点:
本发明通过改变DOE与IC之间的角度,从而赋予DOE一个微小角度设定,使晶侧仅受到一个Laser Beam的接触,达到降低热效应对晶侧的影响和保证了晶圆的生产质量的目的。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为现有技术中DOE与IC的位置结构示意图;
图2为本发明实施例公开的DOE与IC的位置结构示意图;
图3为改善前IC抗压图;
图4为采用本发明所生产的IC抗压图;
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述。
本发明提供了一种激光卡槽制程后改善工艺,其工作原理是通过改变DOE与IC之间的角度,从而赋予DOE一个微小角度设定,使晶侧仅受到一个Laser Beam的接触,达到降低热效应对晶侧的影响和保证了晶圆的生产质量的目的。
下面结合实施例和具体实施方式对本发明作进一步详细的说明。
如图2所示,一种激光卡槽制程后改善工艺,其步骤具体如下:
(1).调整DOE的角度,使其与生产的IC形成一定的倾斜角度;具体如下:
(1-1)、根据产品确定需要调节的角度参数;
(1-2)、根据上述参数调节设备上的镭射头,调整完成后将镭射头进行固定;
(1-3)、对固定后的镭射头的激光角度进行检测,若发生不对应则重复步骤(1-2);若检测准备,则进入步骤(2);
(2).在步骤(1)的基础上对IC依次进行Grooving process制程工艺。
雷射工艺中,通常会对切割道执行三次雷射激光(3pass):
第一次(1st pass)建立沟槽范围;
第二次(2nd pass)为使雷射激光后晶圆切割道达到一定的深度;
第三次(3rd pass)主要目的使雷射激光后的位置底部平坦化,以达U-shape的模式。
采用三点抗弯的检测方式,分别就传统工艺获取的产品和采用本工艺获取的产品进行检测,并分别获取图3和图4所显示的数据。
对比图3和图4,以Weibull分布图计算B10值进行比较,折断晶粒的压力可以由360mpa提升至423mpa,晶粒抗压强度增加,改善效果显着。
以上所述的仅是本发明所公开的一种激光卡槽制程后改善工艺的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。

Claims (3)

1.一种激光卡槽制程后改善工艺,其特征在于,其步骤具体如下:
(1).调整DOE的角度,使其与生产的IC形成一定的倾斜角度;
(2).在步骤(1)的基础上对IC依次进行Grooving process制程工艺。
2.根据权利要求1所述的一种激光卡槽制程后改善工艺,其特征在于,步骤(1)中主要是通过调节设备上的镭射头的角度来实现。
3.根据权利要求2所述的一种激光卡槽制程后改善工艺,其特征在于,在步骤(1)中调节完镭射头的角度后,需要对其打出的激光角度进行检测。
CN202010674758.9A 2020-07-14 2020-07-14 一种激光卡槽制程后改善工艺 Pending CN112038229A (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1491144A (zh) * 2001-08-10 2004-04-21 三星钻石工业股份有限公司 脆性材料基片的倒角方法以及倒角装置
JP2010207879A (ja) * 2009-03-11 2010-09-24 Panasonic Corp レーザ加工方法およびレーザ加工装置
JP2014008519A (ja) * 2012-06-29 2014-01-20 Furukawa Co Ltd レーザーパルスによる加工物の製造方法及びレーザー加工装置
CN103934577A (zh) * 2014-03-12 2014-07-23 苏州兰叶光电科技有限公司 切宽可调的无杂光激光加工***
CN109352184A (zh) * 2018-10-23 2019-02-19 深圳赛意法微电子有限公司 硅基晶圆的分束激光切割方法
WO2019162266A1 (de) * 2018-02-20 2019-08-29 Siltectra Gmbh Verfahren zum erzeugen von kurzen unterkritischen rissen in festkörpern

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1491144A (zh) * 2001-08-10 2004-04-21 三星钻石工业股份有限公司 脆性材料基片的倒角方法以及倒角装置
JP2010207879A (ja) * 2009-03-11 2010-09-24 Panasonic Corp レーザ加工方法およびレーザ加工装置
JP2014008519A (ja) * 2012-06-29 2014-01-20 Furukawa Co Ltd レーザーパルスによる加工物の製造方法及びレーザー加工装置
CN103934577A (zh) * 2014-03-12 2014-07-23 苏州兰叶光电科技有限公司 切宽可调的无杂光激光加工***
WO2019162266A1 (de) * 2018-02-20 2019-08-29 Siltectra Gmbh Verfahren zum erzeugen von kurzen unterkritischen rissen in festkörpern
CN109352184A (zh) * 2018-10-23 2019-02-19 深圳赛意法微电子有限公司 硅基晶圆的分束激光切割方法

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