Patent ID: 9231112
Filing Date: 2016-01-05
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a substrate, the substrate comprising a groove; a plurality of first bit lines comprising a plurality of upper faces, the plurality of first bit lines provided on the substrate; an insulating layer that is provided between the plurality of first bit lines on the substrate, the insulating layer comprising opposing side faces, wherein an upper face of the insulating layer is higher than a plurality of upper faces of the plurality of first bit lines; and an ONO film comprising a top oxide film, a tunnel oxide film, and a plurality of charge storage layers, the top oxide film and the tunnel oxide film each comprising top, bottom and side surfaces, wherein at least a portion of the bottom surface of the top oxide film is in direct contact with the top surface of the tunnel oxide film, further wherein a path of a current flowing through the substrate and between the plurality of first bit lines is lengthened by the portion of the insulating layer provided in the groove of the substrate.