Author/Authors :
Su، نويسنده , , Y.K. and Chang، نويسنده , , S.J and Kuan، نويسنده , , T.M and Ko، نويسنده , , C.H and Webb، نويسنده , , J.B and Lan، نويسنده , , W.H and Cherng، نويسنده , , Y.T and Chen، نويسنده , , S.C، نويسنده ,
Abstract :
Nitride-based Al0.24Ga0.76N/GaN heterostructure field effect transistors (HFETs) with carrier confinement layers were successfully fabricated. It was found that the source–drain (S–D) leakage currents of the HFETs with carrier confinement layers were much smaller. It was also found that we could enhance the two dimensional electron gas (2DEG) carrier mobility from 1070 to 1180 cm2/V/s by the insertion of a Mg-doped semi-insulating carrier confinement layer with a Cp2Mg flow rate of 2.36×10−8 mole/min. At the same time, we could also achieve a smoother sample surface. The dc and rf characteristics of these HFETs were also found to be good.
Keywords :
HFET , GaN , AFM , Carrier confinement
