Invention Grant
US08809191B2 Semiconductor device and method of forming UBM structure on back surface of TSV semiconductor wafer 有权
在TSV半导体晶片背面形成UBM结构的半导体器件及方法

Semiconductor device and method of forming UBM structure on back surface of TSV semiconductor wafer
Abstract:
A semiconductor device has a plurality of conductive vias formed through the semiconductor die with a first insulating layer around the conductive vias. A recess is formed in the first insulating layer around the conductive vias by LDA. A portion of the semiconductor wafer is removed by LDA after forming the recess in the first insulating layer so that the conductive vias extend above a surface of the semiconductor wafer. The first insulating layer extends to the surface of the semiconductor wafer or above the surface of the semiconductor wafer. A second insulating layer is formed over the surface of the semiconductor wafer and conductive vias. A first portion of the second insulating layer is removed by LDA, while leaving a second portion of the second insulating layer over the surface of the semiconductor wafer around the conductive vias. An electroless plated bump is formed over the conductive vias.
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