A new high performance field-effect transistor using stop-doped n-In0.
15Ga0.85As channels was fabricated and demonstrated. For a 1 x 100 mu
m(2) device a high gate breakdown voltage of 15 V, a maximum drain sat
uration current of 735 mA/mm a maximum transconductance of 200 mS/mm a
nd a wide gate voltage range > 3 V, with the transconductance > 60 mS/
mm, are obtained.