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

Claim 0:
1. 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 stepped sidewall structure including a lower sidewall, an upper sidewall laterally offset from the lower sidewall, and an intermediary surface laterally extending from a bottom edge of the upper sidewall to a top edge of the lower sidewall, the conductive bump has a bottom portion over the conductive pad and a top portion over the bottom portion;
a conductive cap over the conductive bump, wherein the bottom portion of the conductive bump is wider than the conductive cap and the top portion of the conductive bump; and
a passivation layer over the semiconductor substrate and laterally surrounding the conductive bump, wherein the passivation layer has a top surface higher than the intermediary surface of the stepped sidewall structure of the conductive bump and lower than a top surface of the conductive cap.