Patent ID: 7038275

Claim:
A buried-gate-type semiconductor device comprising: a semiconductor substrate; a first one-conduction-type semiconductor region formed in the semiconductor substrate; a first other-conduction-type semiconductor region formed above of the first one-conduction-type semiconductor region; a plurality of buried gates buried in the semiconductor substrate penetrating the first other-conduction-type semiconductor region, the buried gates having long sides and short sides intersecting to one another in a section parallel to a surface of the semiconductor substrate, and being arranged repeatedly along at least short-side direction; a second one-conduction-type semiconductor region formed at a surface side of the first other-conduction-type semiconductor region; a second other-conduction-type semiconductor region having a bottom portion deeper than a bottom portion of buried gates, the second other-conduction-type semiconductor region being at least formed at a side portion of a buried gate's short side; and a wiring layer, wherein a contact portion at which the second one-conduction-type semiconductor region and the wiring layer are in contact with each other is arranged at a buried gate's short side.