Stats Chippac Pte. Ltd.

Wonll Kwon

DaeSik Choi

JoonYoung Choi

MinJung Kim

A semiconductor wafer has a contact pad. A first insulating layer is formed over the wafer. A second insulating layer is formed over the first insulating layer and contact pad. A portion of the second insulating layer is removed to expose the contact pad. A first UBM layer is formed over and follows a contour of the second insulating layer and contact pad to create a well over the contact pad. A first buffer layer is formed in the well over the first UBM layer and the contact pad. A second UBM layer is formed over the first UBM layer and first buffer layer. A third UBM layer is formed over the second UBM layer. A bump is formed over the third UBM layer. The first buffer layer reduces stress on the bump and contact pad. A second buffer layer can be formed between the second and third UBM layers.

Semiconductor device and method of forming multi-layered UBM with intermediate insulating buffer layer to reduce stress for semiconductor wafer

A method of manufacture of an integrated circuit packaging system includes: providing a wafer substrate having an active side containing a contact; forming a through silicon via extending through the wafer substrate electrically connected to the contact having a via width; forming a first coupling feature extending from a top side of the through silicon via; and forming a second coupling feature on the side of the through silicon via opposite the first coupling feature.

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Seoul, South Korea

Wonll Kwon