Patent ID: 9660033
Date: 2017-05-23
CPC Classifications: H01L

Claim:
1. A method of forming a semiconductor device, the method comprising: providing a fin extending from a substrate, the fin having a source/drain region and a channel region, wherein the fin includes a first layer disposed over the substrate, a second layer disposed over the first layer, and a third layer disposed over the second layer; removing at least a portion of the second layer from the channel region to form a gap between the first and third layers; forming a first material in the channel region to form a first interfacial layer portion at least partially wrapping around the first layer and a second interfacial layer portion at least partially wrapping around the third layer; depositing a second material in the channel region to form a first high-k dielectric layer portion at least partially wrapping around the first interfacial layer portion and a second high-k dielectric layer portion at least partially wrapping around the second interfacial layer portion; and forming a metal layer along opposing sidewalls of the first and second high-k dielectric layer portions in the channel region, wherein the metal layer includes a scavenging material.