Patent ID: 9275964
Filing Date: 2016-03-01
CPC Classification: H01L

Claim Text:
1. A method of forming a semiconductor device, the method comprising: providing a first substrate having a first electrical contact on a first side and a second electrical contact on a second side; forming a first buffer layer overlying the first electrical contact, the first buffer layer having a first opening over at least a portion of the first electrical contact; forming a first conductor pad, the first conductor pad extending over a top surface of the first buffer layer, the first conductor pad having a uniform thickness; providing a second substrate having a third electrical contact on a third side; forming a second buffer layer overlying the third electrical contact, the second buffer layer having a second opening over at least a portion of the third electrical contact; forming a second conductor pad, the second conductor pad extending over a top surface of the second buffer layer, the second conductor pad having a non-planar upper surface; and attaching the first substrate to the second substrate using a conductive element, the conductive element being in direct contact with the first conductor pad and the second conductor pad.