矿用智能气体传感器元件模块灌封封装工艺优化

Analysis and Optimum Design of Explosion Loss Case of Die Casting Aluminum Alloy

针对矿用气体智能传感器元件模块多采用环氧灌封工艺,灌封后传感器元件模块芯片易造成应力损伤;通过对产品缺陷分析后,采用改良环氧树脂及灌封工艺,可有效减少灌封元器件损坏,但仍不能完全避免内应力现象。最终通过优化方案,提出一种分层复合灌封方案,在元器件表面预先涂覆弹性涂层后,再进行环氧树脂灌封。实践表明,该技术方案可有效降低环氧树脂灌封件内部的残余应力,对50件样品进行高低温实验测试,经测试全部合格。跟踪3500件产品工程应用,未发生因灌封造成的批量损坏。

According to the component module of mine intelligent gas sensor using epoxy encapsulation technology, the encapsulated sensor element module chip caused by the stress injury; through the analysis of product defects, modified epoxy resin and encapsulation technology, can effectively reduce the sealing component damage, but still can not completely avoid the phenomenon of internal stress.Finally, through the optimization scheme, a layered composite encapsulation scheme was proposed.After coating the elastic coating on the surface of the components, the epoxy resin encapsulation was carried out. Practice shows that the technology scheme can effectively reduce the residual stress in the epoxy resin sealing part, and test 50 samples at high and low temperature. All the tests are qualified. 3 500 product engineering applications were tracked, and no mass damage caused by sealing was caused.