Patent ID: 11908818
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A semiconductor device, comprising:
a semiconductor substrate;
a conductive pad over the semiconductor substrate;
a conductive bump over the conductive pad, wherein the conductive bump has a bottom portion over the conductive pad and a top portion over the bottom portion, and the top portion is wider than the bottom portion;
a conductive cap over the top portion of the conductive bump, wherein the conductive cap has a curved top surface, and the top portion of the conductive bump has a curved top surface in contact with the conductive cap; and
a passivation layer over the semiconductor substrate and surrounding the conductive bump, wherein the passivation layer has a first portion in contact with the bottom portion of the conductive bump and a second portion over the first portion and spaced apart from the conductive cap, and a top surface of the second portion of the passivation layer is lower than the curved top surface of the conductive cap.