Patent ID: 9450108
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A nonvolatile semiconductor memory device comprising: a semiconductor portion; a first oxygen-containing portion provided on the semiconductor substrate; a silicon-containing portion provided on the first oxygen-containing portion; a first film provided on the silicon-containing portion and including a lamination of a first portion containing silicon and oxygen and a second portion containing silicon and nitrogen; a first high dielectric insulating portion provided on the first film and having an oxide-containing yttrium, hafnium or aluminum; a second oxygen-containing portion provided on the first high dielectric insulating portion; a second high dielectric insulating portion provided on the second oxygen-containing portion and having an oxide-containing yttrium, hafnium or aluminum; a third oxygen-containing portion provided on the second high dielectric insulating portion; and a second film provided on the third oxygen-containing portion.