Patent ID: 8557659
Filing Date: 2013-10-15
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, comprising: forming a plurality of first gate electrodes arranged according to a gate pitch over a first active region of a substrate, each first gate electrode having a first width; forming a plurality of second gate electrodes arranged according to the gate pitch over a second active region of the substrate, each second gate electrode having a second width greater than the first width; depositing a first oxygen-sealing layer on the plurality of the first gate electrodes and the plurality of second gate electrodes; depositing an oxygen-containing layer on the first oxygen-sealing layer; depositing a second oxygen-sealing layer on the oxygen-containing layer; removing a portion of the second oxygen-sealing layer over top surfaces of the plurality of the first gate electrodes and the plurality of the second gate electrodes; and removing the second oxygen-sealing layer over the second active region.