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

Claim 14:
15. A bump structure, comprising:
a passivation layer surrounding a metal pad;
a polyimide layer including a polyimide disposed over the passivation layer and the metal pad; and
a metal bump disposed over the metal pad and the polyimide layer,
wherein the metal bump is in electrical contact with the metal pad, and
the polyimide is a reaction product of a dianhydride and a diamine,
wherein at least one of the dianhydride and the diamine comprises a fused ring selected from the group consisting of naphthalene, anthracene, phenanthrene, chrysene, pyrene, corannulene, coronene, hexahelicene, indole, isoindole, indolizine, quinoline, isoquinoline, purine, carbazole, dibenzofuran, xanthene, phenazine, phenoxazine, and phenoxathiin.