The utility model relates to the technical field of
gallium nitride power devices, in particular to a double-channel enhanced GaN power device, which comprises a substrate, a nucleating layer, a buffer layer, a lower channel layer, a first
barrier layer, an upper channel layer, a second
barrier layer and an insulating medium layer which are sequentially arranged from bottom to top. The device further comprises a first source-drain
electrode group, a
second source-drain
electrode group, a first grid
electrode and a second grid electrode. The structure is provided with two channels, two source electrodes,
two grid electrodes and two drain electrodes, the on-resistance of the channels is reduced by adding one
conducting channel, and the
ohmic contact resistance of the source electrodes is reduced by forming
ohmic contact between the two source electrodes and the two channels respectively. The
ohmic contact resistance of the drain electrodes is reduced by forming ohmic contact between the two drain electrodes and the two channels respectively, so that the
on resistance of the whole device is reduced under the condition that the
chip area is not increased, and finally the
chip size and the
chip cost are reduced. In addition, the design of the
two grid electrodes can ensure the control capability of the grid electrodes on the two channels.