Patent ID: 7122902

Claim:
A semiconductor device comprising a copper layer having a bonding portion, an insulating layer covering said copper layer, a first hole selectively formed in said insulating layer to expose said bonding portion of said copper layer, an aluminum layer, a first portion of which is patterned to form an aluminum bonding pad in electrical contact with said bonding portion of said copper layer through said first bole, and a second portion of which aluminum layer is patterned to form an aluminum interconnect on said insulating layer, said aluminum bonding pad and said aluminum interconnect being made of an aluminum-based material, an insulator protection film covering said insulating layer, said aluminum bonding pad and said aluminum interconnect to protect each of said aluminum bonding pad and said aluminum interconnect, a first barrier layer being formed between said aluminum bonding pad and said insulator protection film and a second barrier layer being formed between said aluminum interconnect and said insulator protection film, and a second hole selectively formed in said insulator protection film and said first barrier layer to expose apart of said aluminum bonding pad.