Patent ID: 8580657
Filing Date: 2013-11-12
Classification: H01L

Abstract:
1. A method of forming an integrated circuit structure, the method comprising: providing a wafer comprising: forming a notch in the scribe line, wherein the notch extends from a top surface of the wafer to stop at an intermediate level between a top surface and a bottom surface of the semiconductor substrate, and extends substantially from one end to an opposite end of the scribe line, wherein the notch comprises a bottom surface, with the bottom surface being a surface of a semiconductor material of the semiconductor substrate; forming a first insulation film over the wafer, wherein the first insulation film extends into the notch and contacts the bottom surface of the notch; patterning the first insulation film to remove a portion of the first insulation film from a center of the notch, wherein a remaining portion of the first insulation film comprises a first edge in the notch; forming a second insulation film over the first insulation film, wherein the second insulation film extends into the notch and contacts the bottom surface of the notch; patterning the second insulation film to remove a portion of the second insulation film from the center of the notch, wherein a remaining portion of the second insulation film comprises a second edge in the notch, and wherein a bottom surface of the first insulation film in the notch and a bottom surface of the second insulation film in the notch are level with each other; and sawing the wafer to separate the first semiconductor chip and the second semiconductor chip.