CN115505452A - 一种SiC晶圆切割用钻石切割液及其制备方法 - Google Patents
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Abstract
本发明提供了一种SiC晶圆切割用钻石切割液及其制备方法,包括如下步骤:S1.将聚乙二醇、润滑剂、去离子水在水浴加热中混合、搅拌得到混合物a;S2.添加表面活性剂,充分搅拌后至完全溶解后得到液体b;S4.再添加消泡剂,水浴加热中搅拌得到液体c;S5.最后再添加石墨烯,在高压反应釜内反应得到切割液。制备的钻石切割液中含有石墨烯粉末,利用其优异的力学性能,均匀分布在切割液中,与碳化硅粉末复配,可以更好的防止切割时切割线滑移位错;本发明的配方呈弱酸性,在切割时,石墨烯还能利用产生的氢气进行纯化,一方面降低生产隐患,另一方面加强利用石墨烯的力学性能。
Description
技术领域
本发明涉及SiC晶圆切割液技术领域,具体而言,涉及一种SiC晶圆切割用钻石切割液及其制备方法。
背景技术
SiC晶圆是生产制造IC的基本原材料。硅晶圆的生产过程通常是基于纯净度做到99.999%的纯光伏材料,这种纯硅需要被做成硅晶棒,历经照相制版、研磨、打磨抛光、切成片等程序流程,将多晶硅融解拉出单晶硅晶棒,随后切成一片一片的、薄薄硅晶圆。基于硅晶圆能够生产加工制做成各种各样电路元件,生产制造出有特殊电性功能的集成电路芯片产品。因此SiC晶圆划片是整个芯片生产制造工艺流程中的一道不可或缺的工序。
而在SiC晶圆划片全过程中,因为强机械设备力的作用,晶圆边缘非常容易发生微裂、崩边和应力集中点,晶圆表层也非常容易存有应力遍布不均匀和损坏的状况,这种缺陷是导致晶圆制造中造成很多滑移线、外延层错、滑移位错、微缺陷等二次缺陷及其晶圆、芯片易裂开的关键要素;且SiC晶圆粉末在切割过程中,由于粒径过细,与水反应会释放出氢气,长期生产积累会造成安全隐患。
发明内容
本发明的目的在于提供一种SiC晶圆切割用钻石切割液及其制备方法,以解决SiC晶圆划片过程中应力遍布不均匀,造成滑移位错,以及SiC晶圆粉末在切割过程中,由于粒径过细,与水反应会释放出氢气,容易造成安全隐患等技术问题。
本发明通过以下技术方案实现:
一种SiC晶圆切割用钻石切割液,包括:以质量份计,
聚乙二醇 30-50份
表面活性剂 5-15份
消泡剂 1-5份
润滑剂 10-20份
石墨烯 0.5-3份
去离子水 50-100份
所述切割液为弱酸性。
进一步来说,还包括耦合剂5-10份。
具体来说,所述耦合剂选用二乙二醇单丁醚或丙二醇甲醚。
具体来说,所述表面活性剂选用十二烷基苯磺酸、脂肪醇聚氧乙烯醚按照质量比2:1的混合物。
具体来说,所述消泡剂选用GP型甘油聚醚。
具体来说,所述润滑剂选用氯化石蜡。
一种SiC晶圆切割用钻石切割液的制备方法,包括如下步骤:
S1.将聚乙二醇、润滑剂、去离子水在水浴加热中混合、搅拌得到混合物a;
S2.添加表面活性剂,充分搅拌后至完全溶解后得到液体b;
S4.再添加消泡剂,水浴加热中搅拌得到液体c;
S5.最后再添加石墨烯,在高压反应釜内反应得到切割液。
进一步来说,在所述S1-S3中,搅拌时间为5-15min,搅拌速率为500-1200 r/min。
进一步来说,在所述S4步骤后,对液体c进行震荡处理。
本发明实施例的技术方案至少具有如下优点和有益效果:
(1)本发明配方中含有石墨烯粉末,利用其优异的力学性能,均匀分布在切割液中,与碳化硅粉末复配,可以更好的防止切割时切割线滑移位错;
(2)本发明的配方呈弱酸性,在切割时,石墨烯还能利用产生的氢气进行纯化,一方面降低生产隐患,另一方面加强利用石墨烯的力学性能。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。
实施例1
一种SiC晶圆切割用钻石切割液,包括:以质量份计,聚乙二醇 30份、十二烷基苯磺酸 5份、GP型甘油聚醚 1份、氯化石蜡 10份、石墨烯 0.5份、去离子水 50份;所述切割液PH为6.5。
其制备方法如下:
S1.将聚乙二醇、氯化石蜡、去离子水在水浴加热中混合、搅拌10min得到混合物a;
S2.添加十二烷基苯磺酸,充分搅拌后至完全溶解后得到液体b;
S4.再添加GP型甘油聚醚,水浴加热中搅拌得到液体c;
S5.最后再添加石墨烯,在高压反应釜内反应得到切割液。
对比例1
一种SiC晶圆切割用钻石切割液,包括:以质量份计,聚乙二醇 30份、十二烷基苯磺酸 5份、GP型甘油聚醚 1份、氯化石蜡 10份、去离子水 50份;所述切割液PH为6.5。
使用切割液后,实施例1与对比例1对比,晶圆表层更均匀,损坏更轻微。
以上仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (9)
1.一种SiC晶圆切割用钻石切割液,其特征在于,包括:以质量份计,
聚乙二醇 30-50份
表面活性剂 5-15份
消泡剂 1-5份
润滑剂 10-20份
石墨烯 0.5-3份
去离子水 50-100份
所述切割液为弱酸性。
2.根据权利要求1所述的一种SiC晶圆切割用钻石切割液,其特征在于,还包括耦合剂5-10份。
3.根据权利要求2所述的一种SiC晶圆切割用钻石切割液,其特征在于,所述耦合剂选用二乙二醇单丁醚或丙二醇甲醚。
4.根据权利要求1所述的一种SiC晶圆切割用钻石切割液,其特征在于,所述表面活性剂选用十二烷基苯磺酸、脂肪醇聚氧乙烯醚按照质量比2:1的混合物。
5.根据权利要求1所述的一种SiC晶圆切割用钻石切割液,其特征在于,所述消泡剂选用GP型甘油聚醚。
6.根据权利要求1所述的一种SiC晶圆切割用钻石切割液,其特征在于,所述润滑剂选用氯化石蜡。
7.根据权利要求1至6中任一项所述的一种SiC晶圆切割用钻石切割液的制备方法,其特征在于,包括如下步骤:
S1.将聚乙二醇、润滑剂、去离子水在水浴加热中混合、搅拌得到混合物a;
S2.添加表面活性剂,充分搅拌后至完全溶解后得到液体b;
S4.再添加消泡剂,水浴加热中搅拌得到液体c;
S5.最后再添加石墨烯,在高压反应釜内反应得到切割液。
8.利用根据权利要求7所述的一种SiC晶圆切割用钻石切割液的制备方法,其特征在于,在所述S1-S3中,搅拌时间为5-15min,搅拌速率为500-1200 r/min。
9.根据权利要求7所述的一种SiC晶圆切割用钻石切割液的制备方法,其特征在于,在所述S4步骤后,对液体c进行震荡处理。
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Citations (4)
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CN102851108A (zh) * | 2012-08-03 | 2013-01-02 | 江西赛维Ldk太阳能高科技有限公司 | 一种金刚石线切割液及其制备方法 |
CN109702639A (zh) * | 2019-01-02 | 2019-05-03 | 山东天岳先进材料科技有限公司 | 一种SiC单晶片磨抛方法 |
CN111303981A (zh) * | 2020-03-26 | 2020-06-19 | 常州高特新材料股份有限公司 | 一种金刚线切割液及其制备方法 |
CN114989880A (zh) * | 2022-07-06 | 2022-09-02 | 湖南三安半导体有限责任公司 | 切割液及其制备方法 |
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CN102851108A (zh) * | 2012-08-03 | 2013-01-02 | 江西赛维Ldk太阳能高科技有限公司 | 一种金刚石线切割液及其制备方法 |
CN109702639A (zh) * | 2019-01-02 | 2019-05-03 | 山东天岳先进材料科技有限公司 | 一种SiC单晶片磨抛方法 |
CN111303981A (zh) * | 2020-03-26 | 2020-06-19 | 常州高特新材料股份有限公司 | 一种金刚线切割液及其制备方法 |
CN114989880A (zh) * | 2022-07-06 | 2022-09-02 | 湖南三安半导体有限责任公司 | 切割液及其制备方法 |
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