亚洲精品九色线网站_91精品国产综合久久久久久_91精品国产91久久久久久最新_色久久综合色一色99在线观看_国产伊人99精品一区二区三区在线观看

Testing of gold plate welded by laser solder ball
Source: Click: secondary  
With the development of microelectronics industry to lightweight, thin, miniaturization, the increase of the number of I / O terminals and the diversification of functions, flip chip packaging technology came into being, and underfill is the core process.The underfill process of

chip is to fill the gap between the chip and the substrate with glue to protect and strengthen the solder ball or solder pin. It is commonly used in flipchip packaging.

?