CN111613540A - 一种高可靠性整流桥及整流模块的生产工艺 - Google Patents
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Abstract
本发明公开了一种高可靠性整流桥及整流模块的生产工艺,属于半导体器件加工领域。包括以下步骤:取镀金后的已扩散硅片,进行光刻和蚀刻开沟,对蚀刻开沟后的晶圆片进行一次碱洗,再切割成OJ芯片;取切割后的OJ芯片焊接在整流桥框架中;对焊接在整流桥框架上的OJ芯片进行二次碱洗;在碱洗后的铜基框架及同等功能基片上的OJ芯片四周填涂聚酰亚胺,实现对OJ芯片PN结的钝化保护;采用传统的环氧树脂或AB胶对钝化后的产品进行封装。本发明采用OJ芯片焊接好后,进行碱洗和聚酰亚胺钝化保护,相比较传统生产工艺具有工艺简单,成本低,耐高温能力和耐高低温循环能力强,可靠性高,低功耗节能,使用寿命长。
Description
技术领域
本发明属于半导体器件加工领域,具体涉及一种高可靠性的整流桥及整流模块生产工艺。
背景技术
传统的整流桥及整流模块通常由多个GPP芯片先钝化保护,然后再焊接到一个框架中作桥式连接,外部采用绝缘材料环氧树脂封装而成。但是这种工艺缺点是,GPP芯片与硅的膨胀系数差异很大,耐高低温循环能力(TC能力)和耐高温能力(HTRB能力)相对较低,可靠性低;而且GPP芯片加工需经过三道光刻,工艺复杂,成本高。
发明内容
针对传统技术中缺陷与不足的问题,本发明提出了一种高可靠性整流桥及整流模块的生产工艺,采用OJ芯片焊接好后进行碱洗和聚酰亚胺钝化保护,相比较传统生产工艺具有工艺简单,成本低,耐高温能力和耐高低温循环能力强,可靠性高,低功耗节能,使用寿命长。
本发明解决其技术问题所采用的技术方案为:
一种高可靠性整流桥及整流模块的生产工艺, 包括如下步骤:
a.取镀金后的已扩散硅片,进行光刻和蚀刻开沟,对蚀刻开沟后的晶圆片进行一次碱洗,再切割成OJ芯片;
b.取切割后的OJ芯片焊接在整流桥框架中;
c.对焊接在整流桥框架上的OJ芯片进行二次碱洗;
d.在碱洗后的铜基框架及同等功能基片上的OJ芯片四周填涂聚酰亚胺,实现对OJ芯片PN结的钝化保护;
e.采用传统的环氧树脂或AB胶对钝化后的产品进行封装。
进一步的,所述生产工艺应用于半波整流、单相整流、三相整流及相同功能系列整流桥及整流模块上。
进一步的,所述半波整流系列的整流桥包括TO-251、TO-252、TO-220、ITO-220、TO-263、TO-3P、TO-247、TO-252、TO-92。
进一步的,所述单相整流系列的整流桥包括UMBF、MBF、MBS、ABS、DBS、DBM、KBP、GBP、KBL、KBU、GBU、GBJ、KBJ、GBPC、KBPC、BR、D3K、WOB、WOG。
进一步的,所述三相整流系列的整流桥包括SKBPC、SGBJ、MT、TSB-5。
进一步的,所述整流模块包括MFQ、MFS系列。
本发明具有如下有益效果:本发明采用OJ芯片焊接好后,进行碱洗和聚酰亚胺钝化保护,相比较传统整流桥的生产工艺,优点在于:
1)工艺简单,成本低;
2)耐高温能力强(HTRB能力)和耐高低温循环能力(TC能力)强,可靠性高;
3)功耗低(LOW-VF),节能,使用寿命长。
具体实施方式
下面结合实施例对本发明的具体实施方式进行详细说明。
实施例一:
一种高可靠性整流桥及整流模块的生产工艺, 包括如下步骤:
a.取镀金后的已扩散硅片,进行光刻和蚀刻开沟,对蚀刻开沟后的晶圆片进行一次碱洗,再切割成OJ芯片;
b.取切割后的OJ芯片焊接在整流桥框架中;
c.对焊接在整流桥框架上的OJ芯片进行二次碱洗;
d.在碱洗后的铜基框架及同等功能基片上的OJ芯片四周填涂聚酰亚胺,实现对OJ芯片PN结的钝化保护;
e.采用传统的环氧树脂或AB胶对钝化后的产品进行封装。
所述生产工艺应用于半波整流、单相整流、三相整流等相同功能系列整流桥及整流模块。
其中半波整流包括TO-251、TO-252、TO-220、ITO-220、TO-263、TO-3P、TO-247、TO-252、TO-92等系列;单相整流包括UMBF、MBF、MBS、ABS、DBS、DBM、KBP、GBP、KBL、KBU、GBU、GBJ、KBJ、GBPC、KBPC、BR、D3K、WOB、WOG等系列;三相整流包括SKBPC、SGBJ、MT、TSB-5等系列;整流模块包括MFQ、MFS等系列。
由于得益于聚酰亚胺良好的高电绝缘性、高耐热性、高柔韧性的机械性能,本发明可制作高可靠性整流桥及整流模块;可以提高产品的耐高温能力,可彻底杜绝GPP芯片由于玻璃膨胀系数与硅差异大导致高低温循环中玻璃破裂的风险,从而提高产品的耐高低温循环能力(TC能力),及最终产品的高可靠性。
经实验表明,在-55℃~195℃工况下,传统工艺加工的整流桥/整流模块,采用玻璃钝化保护,其玻璃硬性在高低温循环中易损坏,其TC能力低于5000次循环。而使用本发明工艺的整流桥,采用聚酰亚胺钝化保护,在高低温循环中不易损坏,其TC能力达到1万次以上,其TC能力有显著提高,可靠性好。
传统工艺加工的整流桥的HTRB温度为150℃,而本发明加工的整流桥HTRB值可达到175℃,其能力也有显著提高。
传统采用GPP芯片在焊接前就已经玻璃钝化好,芯片加工需经过三道光刻,工艺复杂,成本高。此工艺生产陈本可节约20%的成本。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明的范围内。本发明要求保护范围由所附的权利要求书及其等同物界定。
Claims (6)
1.一种高可靠性整流桥及整流模块的生产工艺,其特征在于包括如下步骤:
取镀金后的已扩散硅片,进行光刻和蚀刻开沟,对蚀刻开沟后的晶圆片进行一次碱洗,再切割成OJ芯片;
取切割后的OJ芯片焊接在整流桥框架中;
对焊接在整流桥框架上的OJ芯片进行二次碱洗;
在碱洗后的铜基框架及同等功能基片上的OJ芯片四周填涂聚酰亚胺,实现对OJ芯片PN结的钝化保护;
采用传统的环氧树脂或AB胶对钝化后的产品进行封装。
2.如权利要求1所述的一种高可靠性整流桥及整流模块的生产工艺,其特征在于:所述生产工艺应用于半波整流、单相整流、三相整流及相同功能系列整流桥及整流模块上。
3.如权利要求2所述的一种高可靠性整流桥及整流模块的生产工艺,其特征在于:所述半波整流系列的整流桥包括TO-251、TO-252、TO-220、ITO-220、TO-263、TO-3P、TO-247、TO-252、TO-92。
4.如权利要求2所述的一种高可靠性整流桥及整流模块的生产工艺,其特征在于:所述单相整流系列的整流桥包括UMBF、MBF、MBS、ABS、DBS、DBM、KBP、GBP、KBL、KBU、GBU、GBJ、KBJ、GBPC、KBPC、BR、D3K、WOB、WOG。
5.如权利要求2所述的一种高可靠性整流桥及整流模块的生产工艺,其特征在于:所述三相整流系列的整流桥包括SKBPC、SGBJ、MT、TSB-5。
6.如权利要求2所述的一种高可靠性整流桥及整流模块的生产工艺,其特征在于:所述整流模块包括MFQ、MFS系列。
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CN107970612A (zh) * | 2016-10-21 | 2018-05-01 | 电子技术公司 | 多玩家视频游戏匹配***和方法 |
CN108447768A (zh) * | 2018-01-25 | 2018-08-24 | 如皋市远亚电子有限公司 | 一种oj芯片制造二极管的生产工艺 |
CN109449212A (zh) * | 2018-09-19 | 2019-03-08 | 四川上特科技有限公司 | 一种裸封gpp整流二极管芯片及其制造工艺 |
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Patent Citations (6)
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CN102509707A (zh) * | 2011-12-19 | 2012-06-20 | 如皋市大昌电子有限公司 | 聚酰亚胺钝化保护整流芯片的工艺 |
CN106252245A (zh) * | 2016-09-29 | 2016-12-21 | 黄山市七七七电子有限公司 | 高可靠性高压功率半导体模块芯片的制造工艺 |
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