发明申请
US20080038913A1 METHODS OF FORMING ALUMINUM-FREE WIRE BOND PAD AND PAD SO FORMED 审中-公开
形成无铝线焊盘和垫片的方法

METHODS OF FORMING ALUMINUM-FREE WIRE BOND PAD AND PAD SO FORMED
摘要:
Methods of forming an aluminum-free wire bond pad and the pad so formed are disclosed. In one embodiment, the method includes forming an opening through a dielectric layer to a last metal of a chip; forming a tantalum nitride (TaN) layer over the chip and over the opening; removing the tantalum nitride (TaN) layer outside of the opening; forming a passivation mask layer over the chip including a passivation mask opening over the last metal; forming a titanium tungsten (TiW) layer and a copper (Cu) layer over the chip; forming a mask layer over the chip including a mask opening to the copper (Cu) layer over the last metal; forming a nickel (Ni) layer and a copper (Cu) layer and then a gold (Au) layer in the mask opening; and removing the mask.
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