CONTACT SURROUNDED BY PASSIVATION AND POLYMIDE AND METHOD THEREFOR

摘要

A semiconductor device (10) has contact between the last interconnect layer (16) and the bond pad that includes a barrier metal (26) between the bond pad (28) and the last interconnect layer (16). Both a passivation layer (18) and a polyimide layer (22) separate the last interconnect layer (16) and the bond pad (28). The passivation layer (18) is patterned to form a first opening (20) to contact the last interconnect layer (16). The polyimide layer (22) is also patterned to leave a second opening (24) that is inside and thus smaller than the first opening (20) through the passivation (18). The barrier layer (22) is then deposited in contact with the last interconnect (16) layer and bounded by the polyimide layer (22). The bond pad (28) is then formed in contact with the barrier (26), and a wire bond (30) is then made to the bond pad (28).