Patent ID: 8815730
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. A method for forming bond pads on a semiconductor die including at least one transistor, comprising: providing a substrate including at least one transistor having a topside semiconductor surface, wherein a first terminal of said transistor is connected to a bond pad comprising a bond pad metal on said topside semiconductor surface; forming a dielectric stack including a bottom dielectric layer and a top dielectric layer having a contact hole through said dielectric stack over said bond pad, wherein an outer edge of said bottom dielectric layer within said contact hole extends beyond an outer edge of said top dielectric layer to define an exposed bond pad area having a bond pad edge; depositing a first metal layer; depositing a second metal layer on said first metal layer; forming a first photoresist layer exclusively within said contact hole; wet etching said second metal layer to recess said second metal layer from sidewalls of said bottom dielectric layer in said contact hole; forming a second photoresist layer exclusively within said contact hole; and wet etching said first metal layer to recess said first metal layer from said top dielectric layer, wherein said first metal layer extends over said bond pad edge onto said bottom dielectric layer.