A reworkable epoxy underfill is provided for use in an electronic packaged system which incorporates an integrated circuit, an organic printed wire board, and at least one eutectic solder joint formed therebetween. An exemplary embodiment of the encapsulant includes: a cycloaliphatic epoxide; an organic hardener; and a curing accelerator; wherein said cycloaliphatic epoxide includes a carbonate or carbamate group. The encapsulant can also include a filler, such as a silica filler. A method is also provided for forming the aforementioned reworkable epoxy underfills.
提供了一种可重复加工的环氧封装材料,用于电子封装系统中,该系统包括集成电路、有机印刷线路板和至少一个共晶焊接点。所述封装材料的一个示例包括:环状脂肪族环氧
树脂;有机固化剂;以及固化
促进剂;其中所述环状脂肪族环氧
树脂包括
碳酸酯或
氨基甲酸酯基团。封装材料还可以包括填料,如
二氧化硅填料。还提供了一种形成上述可重复加工的环氧封装材料的方法。