Patent ID: 7821050
Filing Date: 2010-10-26
Classification: G11C,H01L,Y10S

Abstract:
1. A transistor fabricated on a semiconductor substrate, comprising: a source and drain in the substrate; a gate on the substrate, the gate being insulated from the substrate by gate dielectric, the gate and gate dielectric having first and second sides; a barrier layer covering at least a portion of the first side of the gate and gate dielectric and at least a portion of the second side of the gate and gate dielectric and extending outward on the substrate from both the first and second sides; a spacer of high-k material formed on at least a portion of the barrier layer and extending outward on the barrier layer on both the first and second sides and separated from the gate and gate dielectric and from the substrate by the barrier layer wherein the high-k material has a dielectric constant greater than that of silicon nitride.