Patent ID: 8859302
Filing Date: 2014-10-14
Classification: G11C,H01L

Abstract:
1. A method of adjusting threshold voltage comprising: providing at least two semiconductor devices on a substrate, the substrate including a base semiconductor layer, a dielectric layer on the base semiconductor layer, and a semiconductor on insulator (SOI) layer on the dielectric layer, wherein the dielectric layer contains a first charge storage element proximate to a first interface between the SOI layer and the dielectric layer and a second charge storage element proximate to a second interface between the base semiconductor layer and the dielectric layer, and wherein each of the at least two semiconductor devices includes a gate structure on a channel region of the semiconductor on insulator (SOI) layer and a source region and a drain region on opposing sides of the channel region; measuring a test electrical property of at least one of the semiconductor devices to determine if the test electrical property meets a target electric property of the at least one semiconductor device; and applying at least one of a voltage to the drain region and the source region, a voltage to the gate structure, and a voltage to the base semiconductor layer until a charge is collected in the charge storage element of the dielectric layer for a time period that adjusts the test electrical property of the at least one of the semiconductor devices towards the target electrical property.