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

Claim 8:
9. 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 metal bump is in electrical contact with the metal pad structure, and
the polyimide layer is adhered to the passivation layer and the metal pad structure by an adhesion promotor, wherein the adhesion promotor is chemically bonded to the polyimide, the passivation layer, and the metal pad structure,
wherein the polyimide is a reaction product of a dianhydride and a diamine, wherein at least one of the dianhydride and the diamine comprises one selected from the group consisting of a cycloalkane, a fused ring, a bicycloalkane, a tricycloalkane, a bicycloalkene, a tricycloalkene, a spiroalkane, and a heterocyclic ring.