发明授权
US06274441B1 Method of forming bitline diffusion halo under gate conductor ledge 失效
在栅极导体突起处形成位线扩散晕的方法

Method of forming bitline diffusion halo under gate conductor ledge
摘要:
A method for fabricating a MOSFET device including a halo implant comprising providing a semiconductor substrate, a gate insulator layer, a conductor layer, an overlying silicide layer, and an insulating cap; patterning and etching the silicide layer and the insulating cap; providing insulating spacers along sides of said silicide layer and insulating cap; implanting node and bitline N+ diffusion regions; patterning a photoresist layer to protect the node diffusion region and supporting PFET source and drain regions and expose the bitline diffusion region and NFET source and drain regions; etching exposed spacer material from the side of said silicide layer and insulating cap; implanting a P-type impurity halo implant into the exposed bitline diffusion region and supporting NFET source and drain regions; and stripping the photoresist layer and providing an insulating spacer along the exposed side of said silicide layer and insulating cap.
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