Patent ID: 11923326
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A method of manufacturing a bump structure, comprising:
forming a passivation layer over a substrate;
forming a metal pad structure over the substrate, wherein the passivation layer surrounds the metal pad structure;
forming a polyimide layer comprising a polyimide over the passivation layer and the metal pad structure; and
forming a metal bump over the metal pad structure and the polyimide layer, wherein the polyimide is a reaction product of a dianhydride and a diamine,
wherein at least one of the dianhydride and the diamine comprises a cycloalkane selected from the group consisting of cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, and cyclooctane.