Invention Grant
US09159687B2 Solder bump for ball grid array 有权
球栅阵列的焊球

Solder bump for ball grid array
Abstract:
A solder bump structure for a ball grid array (BGA) includes at least one under bump metal (UBM) layer and a solder bump formed over the at least one UBM layer. The solder bump has a bump width and a bump height and the ratio of the bump height over the bump width is less than 1.
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