Spacer shape engineering for void-free gap-filling process

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

Reexamination Certificate

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C438S197000, C438S218000, C438S303000, C257SE21626

Reexamination Certificate

active

08048752

ABSTRACT:
A method of forming a semiconductor device includes providing a semiconductor substrate; forming a gate stack on the semiconductor substrate; forming a gate spacer adjacent to a sidewall of the gate stack; thinning the gate spacer; and forming a secondary gate spacer on a sidewall of the gate spacer after the step of thinning the gate spacer.

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