Patent ID: 9053944
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A method of thinly coating a plurality of closely spaced fins of a semiconductor device, the method comprising: providing a substrate having a plurality of closely spaced and semiconductive fins projecting vertically there above, wherein outer surfaces including respective top surfaces of the fins are coated with a convertible material different from that of the semiconductive fins and wherein the convertible material is chemically convertible into a predetermined etch resisting material; selectively converting respective portions of the respective convertible material coatings of the respective fins into the predetermined etch resisting material, where the converted portions are more adjacent to the respective vertical projection axes of the vertically projecting fins than are unconverted remaining portions of the convertible material coatings; selectively etching away portions of the respective convertible material coatings that are not masked by the converted and thus etch resisting material to thereby cause the closely spaced semiconductive fins to be less thickly coated about their respective vertical projection axes by the convertible material.