Patent ID: 6063706
Filing Date: 2000-05-16
Classification: H01L

Abstract:
A method to fabricate a self-aligned silicided device, the method comprising the steps of:providing a substrate having a functional region and an electrostatic discharge (ESD) region, which are isolating by a field oxide , and a pad oxide on a surface of said functional region and said ESD region;forming gate of said functional region and gate of said ESD region;forming lightly doping drain (LDD) region on said functional region and said electrostatic discharge (ESD) region;forming a protective layer to cover said electrostatic discharge (ESD) region;forming spacers of said gate of said functional region by depositing a silicon oxide layer on said functional region and etching said silicon oxide layer and said pad oxide on said functional region;forming a self-aligned silicide layer which is on said gate and on said lightly doping drain (LDD) region of said functional region;removing said protective layer;performing an ion implantation on said substrate to form active regions of said functional region and said electrostatic discharge (ESD) region;forming a silicon oxide layer on a surface of said substrate; andperforming a thermal anneal on said substrate.