Patent ID: 9691665
Date: 2017-06-27
CPC Classifications: H01L

Claim:
1. A semiconductor structure with self-aligned spacers, comprising: a substrate; a first gate structure and a second gate structure disposed on the substrate; a cap layer disposed on the first gate structure; a spacer contacting the cap layer and the first gate structure; a dielectric layer disposed on and contacting the cap layer and the spacer; composite self-aligned spacers respectively disposed on a sidewall of the first gate structure and a sidewall of the second gate structure, wherein the composite self-aligned spacer on the first gate structure contacts the dielectric layer, the sidewall of the first gate structure and the sidewall of the second gate structure are opposed to each other, each of the composite self-aligned spacers comprises a nitride-containing material layer and a silicon oxide layer, and the silicon oxide layer is disposed between the substrate and the nitride-containing material layer; and a contact plug disposed between the composite self-aligned spacers and the contact plug contacting the composite self-aligned spacers.