Patent ID: 7791121
Filing Date: 2010-09-07
Classification: H01L

Abstract:
1. A nonvolatile semiconductor memory device comprising: a plurality of bit line diffusion layers formed selectively in an upper portion of a semiconductor region and extending along a first direction; a plurality of gate structures formed on the semiconductor region, extending along a second direction perpendicular to the first direction and each containing a charge trapping film including an insulating film for trapping charge and a gate electrode formed on the charge trapping film; a first interlayer insulating film formed over the plurality of gate structures and having a plurality of openings in which the plurality of bit line diffusion layers are respectively exposed; a plurality of first contacts respectively formed in the openings of the first interlayer insulating film and respectively electrically connected to the plurality of bit line diffusion layers; a UV blocking film formed over the first interlayer insulating film and having a plurality of openings in which the plurality of first contacts are respectively exposed; a second interlayer insulating film formed at least over the UV blocking film and having a plurality of openings in which the plurality of first contacts are respectively exposed; a plurality of second contacts respectively formed in the plurality of openings of the second interlayer insulating film and the plurality of openings of the UV blocking film and respectively electrically connected to the plurality of first contacts, and inner lining films that are formed on inner walls of at least the plurality of openings of the UV blocking film out of the plurality of openings of the second interlayer insulating film and the plurality of openings of the UV blocking film for separating the UV blocking film from the plurality of first contacts and the plurality of second contacts, wherein the inner lining films are made of a single-layered film of silicon carbide, silicon nitride, silicon carbon nitride or silicon oxy-nitride or a multilayered film including at least two of silicon carbide, silicon nitride, silicon carbon nitride and silicon oxy-nitride.