Patent ID: 6579781
Filing Date: 2003-06-17
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device that eliminates the n+ contact implant by using double diffused implants under the core cell contacts, the method comprising:(a) forming core transistors, n-channel transistors and p-channel transistors in a semiconductor substrate; (b) simultaneously forming source and drain DDI implants for the core transistors; (c) forming source and drain Mdd implants for the core transistors; (d) forming source and drain Pldd implants for the p-channel transistors; (e) forming source and drain Nldd implants for the n-channel transistors; (f) forming sidewall spacers on the core, n-channel and p-channel transistors; (g) forming N+ implants for the n-channel transistors; (h) forming P+ implants for the p-channel transistors; and (i) without forming N+ contact implants forming P+ contact implants in the semiconductor substrate in regions in which p-channel transistors will be formed.