Patent ID: 8362595
Filing Date: 2013-01-29
Classification: H01L

Abstract:
1. A mesa semiconductor device comprising: a semiconductor substrate comprising a first semiconductor layer of a first general conductive type and a second semiconductor layer of a second general conductive type formed on a front surface of the first semiconductor layer so as to have a PN junction between the first and second semiconductor layers; a first insulation film covering a front surface of the second semiconductor layer and having an opening; an electrode formed on the front surface of the second semiconductor layer so as to be in contact with the second semiconductor layer through the opening of the first insulation film; a mesa groove formed in the semiconductor substrate from the front surface of the second semiconductor layer to define a mesa on top of which the electrode is disposed; and a second insulation film filling the mesa groove and extending onto the front surface of the second semiconductor layer so as to cover the first insulation film and an end portion of the electrode.