结果表明：铜层过薄，共晶反应生成的液相量太少，未能填满缝隙，接头有空洞出现；

The results suggest that if Cu layer is too thin, the eutectic substance created from eutectic reaction is little, it can not fill the seam and the areas of joints are empty;

youdao

结果表明：铜层过薄，共晶反应生成的液相量太少，未能填满缝隙，接头有空洞出现；

The results suggest that if Cu layer is too thin, the eutectic substance created from eutectic reaction is little, it can not fill the seam and the areas of joints are empty;

youdao