Abstract: In a three dimensional NAND memory, increased threshold voltages in back gate transistors may cause program failures, particularly along word lines near back gates. When back gate transistor threshold voltages cannot be returned to a desired threshold voltage range then modified program conditions, including increased back gate voltage, may be used to allow programming.
Type:
Application
Filed:
September 20, 2013
Publication date:
March 26, 2015
Applicant:
SanDisk Technology Inc.
Inventors:
Deepak Raghu, Gautam Dusija, Chris Avila, Yingda Dong, Man Mui