CN111341656A - 光阻玻璃芯片全自动腐蚀工艺 - Google Patents
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Abstract
本发明属于光阻玻璃生产领域,具体涉及光阻玻璃芯片全自动腐蚀工艺,包括如下步骤:S1设定开沟深度、S2计算开沟时间、S3沟槽腐蚀、S4溢流冲洗、S5沟深测定、S6基片转移,其中若S5沟深测定中沟深符合设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至下一工序;若S5沟深测定中沟深未达到设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至腐蚀槽中,重复步骤S2,直至沟深符合设定要求。该全自动腐蚀工艺可以自动测量基片开沟深度,精准度高;刻蚀合格后的基片通过机械臂转移至下一工序,省时省力,节约人工成本。
Description
技术领域
本发明属于光阻玻璃生产领域,具体涉及光阻玻璃芯片全自动腐蚀工艺。
背景技术
GPP(玻璃钝化)芯片作为电力电子设备中必不可少的器件,目前玻璃钝化有刀刮法、电泳法和光阻法三种方法,其中光阻法玻璃钝化芯片较刀刮法、电泳法可靠性高,光阻法玻璃钝化芯片将逐步取代目前的刀刮法芯片。
光阻法玻璃钝化工艺在制作过程中,化学腐蚀是比较关键的一道工序,是将经过光刻后的单晶硅基片放入低温混酸中,将未被光刻胶保护的部分通过化学反应的方式腐蚀掉,在反应一定时间后,腐蚀深度超过硼面结深,此时芯粒也就有了基本的电性。光阻法中沟槽腐蚀的情况与光阻玻璃芯片的质量密切相连;沟槽太窄,在二次曝光中,芯粒边缘的钝化玻璃宽度不够,玻璃钝化层将被破坏,起不到保护的效果;沟槽太宽,芯粒台面会变小,会导致VF、正向浪涌等参数不符合要求;沟槽太深,芯片在流转过程中容易被破坏,导致损耗显著增加;沟槽太浅,常规电性达不到要求,可能导致整片报废。因此,在达到目标腐蚀深度前,通常会进行多次人工测量与加工,保证最终腐蚀后达到理想深度,而这一过程费时费力,误差大,产品精度低,人工成本高。
发明内容
本发明要解决的技术问题是:针对上述缺陷,本发明提供一种光阻玻璃芯片全自动腐蚀工艺,可以自动测量基片开沟深度,精准度高;刻蚀合格后的基片通过机械臂转移至下一工序,省时省力,节约人工成本。
本发明解决其技术问题采用的技术方案如下:光阻玻璃芯片全自动腐蚀工艺,包括以下步骤:
S1,设定开沟深度:在控制系统上预先设定开沟深度;
S2,计算开沟时间:根据腐蚀液的腐蚀速率和待开沟深度,计算开沟时间;
S3,沟槽腐蚀:将限定有基片的支架浸没在装有腐蚀液的腐蚀槽中;
S4,溢流冲洗:将限定有基片的支架提起并设置在溢流槽内,溢流槽中清洗液冲洗吸附在基片上的腐蚀液,将已开沟深度暴露出;
S6,基片转移:若S5沟深测定中沟深符合设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至下一工序;若S5沟深测定中沟深未达到设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至腐蚀槽中,重复步骤S2,直至沟深符合设定要求。
该光阻玻璃芯片全自动腐蚀工艺,通过控制系统预设开沟深度,并自动计算开沟时间,将基片放入腐蚀槽中腐蚀,并通过机械臂和光学显微镜配合,即使测量出基片当前开沟深度,并通过控制系统计算仍需加工的时间,一方面省去了人工测量,大大节约了人力,且由于该工艺为全自动控制,精准度高,另一方面过程可控,避免出现沟槽太浅或太深而造成基片报废,降低生产误差,提高产品质量。
进一步的,所述S3沟槽腐蚀中的腐蚀槽包括装有高浓度粗腐蚀液的粗腐蚀槽、装有腐蚀速率较低的精腐蚀液的精腐蚀槽,根据腐蚀液的腐蚀特性,计算S2开沟时间。
所述S3沟槽腐蚀操作时,将限定有基片的支架浸没在装有粗腐蚀液的粗腐蚀槽中,先腐蚀一段时间,再将经过初步腐蚀的基片支架转移至装有精腐蚀液的精腐蚀槽中;
所述S6基片转移操作中,当S5沟深测定的中沟深未达到设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至精腐蚀槽中,重复S2计算开沟时间、S3沟槽腐蚀、S4溢流冲洗、S5沟深测定,直至沟深符合设定要求。
将腐蚀槽分为粗腐蚀槽和精腐蚀槽,通过粗腐蚀槽先腐蚀一定深度,再通过精腐蚀槽缓慢腐蚀直至达到设定开沟深度,开沟速度快,开沟深度误差小,进一步提高开沟精度,并提高生产效率。
进一步的,所述粗腐蚀液由下述体积百分比的组分制成:30—50份38%~42%的氢氟酸,30—40份65%~70%的硝酸,5—10份99.9%的冰乙酸,5—15份96%~98%的硫酸,1—5份的饱和氟盐溶液;
所述精腐蚀液由下述体积百分比的组分制成:25—30份38%~42%的氢氟酸,25—30份65%~70%的硝酸,30—40份99.9%的冰乙酸,10—15份96%~98%的硫酸。
该组分制成的粗腐蚀液和精腐蚀液能满足开沟速率快、开沟深度误差小的要求,增加腐蚀后芯粒的一致性。
本发明的有益效果是:
1、该光阻玻璃芯片全自动腐蚀工艺,通过控制系统预设开沟深度,并自动计算开沟时间,将基片放入腐蚀槽中腐蚀,并通过机械臂和光学显微镜配合,即使测量出基片当前开沟深度,并通过控制系统计算仍需加工的时间,一方面省去了人工测量,大大节约了人力,且由于该工艺为全自动控制,精准度高,另一方面过程可控,避免出现沟槽太浅或太深而造成基片报废,降低生产误差,提高产品质量。
2、将腐蚀槽分为粗腐蚀槽和精腐蚀槽,通过粗腐蚀槽先腐蚀一定深度,再通过精腐蚀槽缓慢腐蚀直至达到设定开沟深度,开沟速度快,开沟深度误差小,进一步提高开沟精度,并提高生产效率;设置的粗腐蚀液和精腐蚀液的组成,满足开沟速率快、开沟深度误差小的要求,增加腐蚀后芯粒的一致性。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合实例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1
光阻玻璃芯片全自动腐蚀工艺,包括以下步骤:
S1,设定开沟深度:在控制系统上预先设定开沟深度;
S2,计算开沟时间:根据腐蚀液的腐蚀速率和待开沟深度,计算开沟时间;
S3,沟槽腐蚀:将限定有基片的支架浸没在装有腐蚀液的腐蚀槽中;
S4,溢流冲洗:将限定有基片的支架提起并设置在溢流槽内,溢流槽中清洗液冲洗吸附在基片上的腐蚀液,将已开沟深度暴露出;
S6,基片转移:若S5沟深测定中沟深符合设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至下一工序;若S5沟深测定中沟深未达到设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至腐蚀槽中,重复步骤S2,直至沟深符合设定要求。
所述S2计算开沟时间中,腐蚀液的腐蚀速率设定中,新配置的腐蚀液根据初始腐蚀速率计算,后根据上一批次S5沟深测定以及在S3沟槽腐蚀时腐蚀时间反推的腐蚀速率修订,减小下一批次开沟时间计算的误差;所述S4溢流冲洗时当测得溢流后废液pH大于5后,溢流冲洗完成。
该光阻玻璃芯片全自动腐蚀工艺,通过控制系统预设开沟深度,并自动计算开沟时间,将基片放入腐蚀槽中腐蚀,并通过机械臂和光学显微镜配合,即使测量出基片当前开沟深度,并通过控制系统计算仍需加工的时间,一方面省去了人工测量,大大节约了人力,且由于该工艺为全自动控制,精准度高,另一方面过程可控,避免出现沟槽太浅或太深而造成基片报废,降低生产误差,提高产品质量。
实施例2
光阻玻璃芯片全自动腐蚀工艺,包括以下步骤:
S1,设定开沟深度:在控制系统上预先设定开沟深度;
S2,计算开沟时间:根据中粗腐蚀液和精腐蚀液的腐蚀速率和待开沟深度,计算在粗腐蚀槽和精腐蚀槽中的开沟时间;
S3,沟槽腐蚀:将限定有基片的支架浸没在装有腐蚀液的腐蚀槽中;其中腐蚀槽包括装有高浓度粗腐蚀液的粗腐蚀槽、装有腐蚀速率较低的精腐蚀液的精腐蚀槽,将限定有基片的支架浸没在装有粗腐蚀液的粗腐蚀槽中,根据S2计算的在粗腐蚀槽的开沟时间后,再将经过初步腐蚀的基片支架转移至装有精腐蚀液的精腐蚀槽中;
其中所述粗腐蚀液由下述体积百分比的组分制成:30—50份38%~42%的氢氟酸,30—40份65%~70%的硝酸,5—10份99.9%的冰乙酸,5—15份96%~98%的硫酸,1—5份的饱和氟盐溶液;
所述精腐蚀液由下述体积百分比的组分制成:25—30份38%~42%的氢氟酸,25—30份65%~70%的硝酸,30—40份99.9%的冰乙酸,10—15份96%~98%的硫酸;
S4,溢流冲洗:将限定有基片的支架提起并设置在溢流槽内,溢流槽中清洗液冲洗吸附在基片上的腐蚀液,将已开沟深度暴露出;
S6,基片转移:若S5沟深测定中沟深符合设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至下一工序;,当S5沟深测定的中沟深未达到设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至精腐蚀槽中,重复S2计算开沟时间、S3沟槽腐蚀、S4溢流冲洗、S5沟深测定,直至沟深符合设定要求。
所述S2计算开沟时间中,腐蚀液的腐蚀速率设定中,新配置的腐蚀液根据初始腐蚀速率计算,后根据上一批次S5沟深测定以及在S3沟槽腐蚀时腐蚀时间反推的腐蚀速率修订,减小下一批次开沟时间计算的误差;所述S4溢流冲洗时当测得溢流后废液pH大于5后,溢流冲洗完成。。
明显的,本实施与实施例1相比,将腐蚀槽分为粗腐蚀槽和精腐蚀槽,通过粗腐蚀槽先腐蚀一定深度,再通过精腐蚀槽缓慢腐蚀直至达到设定开沟深度,开沟速度快,开沟深度误差小,进一步提高开沟精度,并提高生产效率。
以上述依据本发明的理想实施例为启示,通过上述的说明内容,相关工作人员完全可以在不偏离本项发明技术思想的范围内,进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容,必须要根据权利要求范围来确定其技术性范围。
Claims (4)
1.光阻玻璃芯片全自动腐蚀工艺,其特征在于,包括以下步骤:
S1,设定开沟深度:在控制系统上预先设定开沟深度;
S2,计算开沟时间:根据腐蚀液的腐蚀速率和待开沟深度,计算开沟时间;
S3,沟槽腐蚀:将限定有基片的支架浸没在装有腐蚀液的腐蚀槽中;
S4,溢流冲洗:将限定有基片的支架提起并设置在溢流槽内,溢流槽中清洗液冲洗吸附在基片上的腐蚀液,将已开沟深度暴露出;
S6,基片转移:若S5沟深测定中沟深符合设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至下一工序;若S5沟深测定中沟深未达到设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至腐蚀槽中,重复步骤S2,直至沟深符合设定要求。
2.如权利要求1所述的光阻玻璃芯片全自动腐蚀工艺,其特征在于:所述S3沟槽腐蚀中的腐蚀槽包括装有高浓度粗腐蚀液的粗腐蚀槽、装有腐蚀速率较低的精腐蚀液的精腐蚀槽,根据腐蚀液的腐蚀特性,计算S2开沟时间。
3.如权利要求2所述的光阻玻璃芯片全自动腐蚀工艺,其特征在于:所述S3沟槽腐蚀操作时,将限定有基片的支架浸没在装有粗腐蚀液的粗腐蚀槽中,先腐蚀一段时间,再将经过初步腐蚀的基片支架转移至装有精腐蚀液的精腐蚀槽中;
所述S6基片转移操作中,当S5沟深测定的中沟深未达到设定的开沟深度,机械臂将测定基片复位,并将装有基片的支架转移至精腐蚀槽中,重复S2计算开沟时间、S3沟槽腐蚀、S4溢流冲洗、S5沟深测定,直至沟深符合设定要求。
4.如权利要求2所述的光阻玻璃芯片全自动腐蚀工艺,其特征在于:所述粗腐蚀液由下述体积百分比的组分制成:30—50份38%~42%的氢氟酸,30—40份65%~70%的硝酸,5—10份99.9%的冰乙酸,5—15份96%~98%的硫酸,1—5份的饱和氟盐溶液;
所述精腐蚀液由下述体积百分比的组分制成:25—30份38%~42%的氢氟酸,25—30份65%~70%的硝酸,30—40份99.9%的冰乙酸,10—15份96%~98%的硫酸。
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