Process for making high performance MOSFET with scaled gate elec

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

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438301, 438306, 438585, H01L 21336

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active

060906766

ABSTRACT:
A process for making a high performance MOSFET with a scaled gate electrode thickness. In one embodiment, the process comprises first providing a substrate. A gate dielectric layer is formed on the substrate, and a gate electrode is formed on the gate dielectric layer. A middle portion of the gate electrode has a first height, and side portions of the gate electrode have heights that are less than the first height. A dopant species is implanted at a first energy level and at a first concentration, whereby lightly doped drain regions are formed in the substrate below the side portions of the gate electrode.

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Pfiester et al., An ITLDD CMOS Process with Self-Aligned Reverse-Sequence LDD/Channel Implantation, IEEE Transactions on Electron Devices, vol. 38, No. 11 (Nov. 1, 1991).

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