Patent ID: 9269803
Filing Date: 2016-02-23
CPC Classification: H01L

Claim Text:
1. A semiconductor device including a field effect transistor, the field effect transistor comprising: (a) a nitride semiconductor layer; (b) a first ohmic electrode including a plurality of first unit electrodes, each of the first unit electrodes coming in physical and ohmic contact with the nitride semiconductor layer, the first unit electrodes being separated from each other and extending serially in a first direction along a long axis of the first unit electrodes; (c) a second ohmic electrode having a plurality of second unit electrodes, each of the second unit electrodes corning in physical and ohmic contact with the nitride semiconductor layer, the second unit electrodes being separated from each other and extending serially in the first direction, in which the second ohmic electrode is separated from the first ohmic electrode; (d) a gate electrode sandwiched between the first ohmic electrode and the second ohmic electrode and running in a direction parallel to the first ohmic electrode and the second ohmic electrode; (e) an insulating film formed to cover the first ohmic electrode and the second ohmic electrode; (f) a plurality of first opening portions that is formed in the insulating film, and reaches the respective first unit electrodes configuring the first ohmic electrode; (g) a plurality of second opening portions that is formed in the insulating film, and reaches the respective second unit electrodes configuring the second ohmic electrode; (h) a source electrode that extends from an interior of the first opening portions onto the insulating film, and is electrically connected to the first ohmic electrode; and (i) a drain electrode that extends from an interior of the second opening portions onto the insulating film, and is electrically connected to the second ohmic electrode, in which the drain electrode is electrically isolated from the source electrode.