Patent ID: 8685863

Claim:
A semiconductor process, comprising the steps of: (a) providing a semiconductor element, the semiconductor element including a base material and at least one conductive via structure, the base material having a top surface, a second surface opposite the top surface and at least one groove, and the conductive via structure being disposed in the groove and having a first end and a second end; and (b) removing part of the base material from a side corresponding to the top surface of the base material by using an anisotropic etchant, to form a first surface and at least one foundation, the groove opening at the first surface, the conductive via structure protruding from the first surface of the base material so as to form a through via structure, and the foundation being located on the first surface and surrounding the through via structure wherein the foundation extends upwards from the first surface, towards the through via structure, and the material of the foundation is the same as that of the base material.