Patent ID: 7332396
Filing Date: 2008-02-19
Classification: H01L

Abstract:
1. A method of fabricating a device with a recessed channel, the method comprising: defining a patterned mask on a substrate; forming a recessed trench in the substrate by using the patterned mask; forming a first conductive layer to cover the substrate, the patterned mask, and the recessed trench; removing the first conductive layer above the patterned mask and a portion of the first conductive layer above the recessed trench to a predetermined depth; forming a reverse spacer, against a sidewall of the patterned mask above the recessed trench, and above the first conductive layer in the recessed trench; forming a second conductive layer on the first conductive layer in the recessed trench by using the patterned mask; removing the patterned mask; and forming a doping region in the substrate on a side of the second conductive layer and against the recessed trench.