Patent ID: 8569824
Filing Date: 2013-10-29
Classification: H01L

Abstract:
1. A semiconductor device comprising: a plurality of bit lines formed in stripes in a semiconductor substrate of a first conductivity type, each of the bit lines being a diffusion layer of an impurity of a second conductivity type; a plurality of gate insulation films formed on regions of the semiconductor substrate between the plurality of bit lines; a plurality of word lines formed on the semiconductor substrate via the gate insulating films, the word lines extending in a direction intersecting with the plurality of bit lines; and a plurality of bit line isolation diffusion layers formed in regions of the semiconductor substrate between the plurality of word lines, each of the bit line isolation diffusion layers being a diffusion layer of an impurity of the first conductivity type and including a first diffusion suppressor for suppressing diffusion of an impurity, wherein the first diffusion suppressor is a different element from the impurity of the first conductivity type, and the first diffusion suppressor is formed shallower than the impurity of the first conductivity type.