V-MOS Device with self-aligned multiple electrodes

摘要

High density VMOSFET devices, particularly single transistor memory cells, are provided by use of a series of simplified self-aligning process steps. Gate electrodes, source/drain regions and source/drain contacts are provided with the aid of an initial mask-less photoresist removal process in which a relatively thick layer of self-leveling photoresist is uniformly removed in order to define portions of a gate electrode within the recess of a V-groove. The gate electrode subsequently acts as a self-aligned mask to define implanted source/drain regions also within the V-groove and to enable second level interconnecting metallurgy contacts to be formed along the sidewalls of the V-groove.