WAFER LEVEL CHIP SCALE PACKAGE FOR WIRE-BONDING CONNECTION
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United States of America Patent
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Issued Date -
Jan 31, 2013
app pub date -
Jul 29, 2011
filing date -
Jul 29, 2011
priority date (Note) -
Abandoned
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Abstract
Primarily disclosed is a wafer-level chip-scale-package (WLCSP) for wire-bonding connection. A first encapsulating layer is formed over a passivation layer of a chip. An RDL (redistribution wiring layer) is formed on the first encapsulating layer. A plurality of wire-bonding pads are stacked on the wiring terminals of the RDL on the first encapsulating layer. Each wire-bonding pad has a top surface and a sidewall. A surface plated layer completely covers the top surfaces of the wire-bonding pads. A second encapsulating layer is formed over the first encapsulating layer to encapsulate the RDL and the sidewalls of the wire-bonding pads. The openings of the second encapsulating layer are smaller than the top surfaces of the corresponding wire-bonding pads to partially encapsulate the surface plated layer. Accordingly, it can resolve the issue of die crack when wire-bonding on thinned chips.
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