Patent ID: 8722537
Filing Date: 2014-05-13
Classification: B81B,B81C,H01G,H01L

Abstract:
1. A method for forming sacrificial layers, the method comprising: providing a substrate; forming a plurality of directly adjacent sacrificial layers over the substrate; patterning the plurality of sacrificial layers simultaneously such that a first sacrificial layer is removed in a first direction at a faster rate than a second sacrificial layer, wherein the difference in removal rates forms a step between the first sacrificial layer and the second sacrificial layer, wherein the first direction is parallel with a major surface of the substrate and wherein the step comprises a first sidewall of the first sacrificial layer and a second sidewall of the second sacrificial layer, the first sidewall being parallel to and laterally offset from the second sidewall, wherein the first sidewall and the second sidewall are perpendicular to a major surface of the substrate; and removing any remaining portion of the plurality of directly adjacent sacrificial layers.