Patent ID: 6483135
Filing Date: 2002-11-19
Classification: H01L

Abstract:
A field effect transistor, comprising:a semiconductor substrate with a channel layer being formed on its surface; a source electrode and a drain electrode being formed at a distance on said semiconductor substrate; and a gate electrode being placed between said source electrode and said drain electrode and making a Schottky junction with said channel layer by contact, said channel layer being uniform in thickness with the exception of the portion optionally etched-in where said gate electrode is in contact with said channel layer, said channel layer having a flat bottom surface in the region between the source electrode and the drain electrode, wherein said gate electrode is provided with an overhanging field plate section, and between said field plate section and said channel layer, there is laid a dielectric film, and when the relative permittivity and the film thickness of the dielectric film are denoted by âˆˆ and t (nm), respectively, the following condition is satisfied: 5&lE;âˆˆ<8, and 100350.