HIGH SOLDER-REFLOW CRACK RESISTANT MOLDING COMPOUND

被引：3

作者：

GALLO, AA

TUBBS, TR

机构：

[1] Dexter Electronic Materials, Dexter Corporation, Olean

来源：

IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY PART A | 1995年 / 18卷 / 03期

关键词：

POPCORN CRACKING; HIGH TEMPERATURE STRENGTH; ADHESION;

D O I：

10.1109/95.465164

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A variety of epoxy resins, filler mixtures, and adhesion additives were examined in semiconductor molding compounds for solder-reflow crack resistance (popcorn crack resistance), A limited comparison of molding compound high temperature strength properties and extent of popcorn cracking suggests no strong positive correlation, On the other hand, factors that might have an impact on adhesive properties of the molding compound, such as low melt viscosity resins and putative adhesion additives appear to have the greatest impact, A molding compound developed with these factors showed no internal or external cracks on 84 had QFP's (29.2 x 29.2 x 3.68 mm) after 72 h of 85 degrees C/85% RH. and one 10-s solder dip at 260 degrees C, Nor were any external cracks observed after 168 h of 85 degrees C/85% R.H. and one solder dip, However, minor internal cracks were observed.

引用

页码：646 / 649

页数：4