Abstract:
The method for forming a very small n+ type source region by using an oxide film of phosphor silicate glass (PSG) material to prevent the generation of latch-back, comprises the steps of growing an N- epitaxial layer (31) onto an N+ silicon substrate (30) to form a thin gate oxide film layer at a device area to form a gate (34) thereon, injecting Boron ions into the N- epitaxial layer (31) to form a P- body region (32) by heat-treating, forming an N+ region (38), and parallel- connecting the N+ region (38) to the P- body region (32) by using a platinum silicide (39) to form a source (40).