Patent ID: 9312330
Filing Date: 2016-04-12
CPC Classification: H01L

Claim Text:
1. A super-junction semiconductor device comprising: a first-conduction type of a semiconductor substrate, a primary plane of the first-conduction-type semiconductor substrate, a super-junction structure having a first primary plane and a second primary plane, wherein the primary plane of the first-conduction-type semiconductor substrate and the first primary plane are in contact with each other, and MOS cell structures formed on the second primary plane side of the super-junction structure, wherein the super-junction structure includes first-conduction-type layers and second-conduction-type layers arranged in parallel to the primary plane, alternating in position to form a stripe pattern in plain view, wherein the MOS cell structures include: high-density, second-conduction-type base regions formed to overlap along a longitudinal direction of the stripe pattern on alternating layers of the second-conduction-type layers of the second primary plane side of the super-junction structure, high-density, first-conduction-type source regions formed along a longitudinal direction on surface layers of the high-density, second-conduction-type base regions, gate electrodes formed along a longitudinal direction of the stripe pattern, through an insulation film on surfaces between the high-density, first-conduction-type source regions formed on the second-conduction-type base regions next to each other, wherein the second-conduction-type layers on which any of the MOS cell structures is not formed are arranged between the high-density, second-conduction-type regions next to each other in a wide direction orthogonal to the longitudinal direction of the stripe pattern, wherein the high-density, second-conduction-type base regions and the second-conduction-type layer on which any of the MOS cell structures is not formed are in conductive connection with each other, and wherein the conductive connection is by a high-density, second-conduction-type layer formed along the wide direction orthogonal to the longitudinal direction of the stripe pattern, connecting the end portion of the high-density, second-conduction-type base regions and the second-conduction-type layers.