Invention Grant
US08533657B2 Printed circuit boards having pads for solder balls and methods for the implementation thereof 有权
具有用于焊球的焊盘的印刷电路板及其实施方法

Printed circuit boards having pads for solder balls and methods for the implementation thereof
Abstract:
A printed circuit board includes a group of pads suitable to be soldered to a respective group of solder-balls of a device. Each pad of the group has a crack initiation point on its perimeter at a location where cracks in a solder-ball are anticipated to start after that solder-ball is soldered to that pad. For a pad of that group having a microvia located therein, a center of that microvia is located farther than a center of that pad from its crack initiation point. For a pad of that group having a trace merging along a portion of its perimeter, that portion does not include a vicinity of that crack initiation point.
Information query
Patent Agency Ranking
0/0