Patent ID: 9318438
Filing Date: 2016-04-19
CPC Classification: H01L

Claim Text:
1. A semiconductor structure, comprising: a first substrate comprising first copper features therein, upper ends of the first copper features protruding above a top surface of the first substrate, lower ends of the first copper features coplanar with a bottom surface of the first substrate; and a second substrate stacked on the first substrate, the second substrate comprising second copper features therein, upper ends of the second copper features protruding above a top surface of the second substrate, lower ends of the second copper features coplanar with a bottom surface of the second substrate, wherein each of the first copper features of the first substrate protrudes above the top surface of the first substrate substantially the same distance, and wherein the protruding upper ends of the first copper features of the first substrate are connected to the lower coplanar ends of the second copper features of the second substrate.