Patent ID: 8748210

Claim:
A method of manufacturing a semiconductor device having a semiconductor substrate, the method comprising: a first step of forming a plurality of first electrically conductive lines above the semiconductor substrate; a second step of forming an insulating film to cover the plurality of first electrically conductive lines; a third step of forming a plurality of trenches in the insulating film at a width not larger than a width of a first electrically conductive line of the plurality of first electrically conductive lines, the plurality of trenches exposing a part of upper surfaces of the plurality of first electrically conductive lines; a fourth step of filling the plurality of trenches with first insulators; a fifth step of forming second electrically conductive lines on the insulating film and the first insulators so as to intersect the plurality of first electrically conductive lines; a sixth step of removing the first insulators from the respective trenches after said fifth step; and a seventh step of filling, with second insulators, portions of the plurality of trenches that do not overlap the second electrically conductive lines when viewed in a direction perpendicular to a surface of the semiconductor substrate, so as to leave, as gaps, at least some of a plurality of regions where the plurality of first electrically conductive lines and the second electrically conductive lines intersect each other in the plurality of trenches, wherein a width of the gap in a direction along a second electrically conductive line of the second electrically conductive lines is not larger than a width of a first electrically conductive line of the plurality of first electrically conductive lines.