Patent ID: 8586462
Filing Date: 2013-11-19
Classification: H01L

Abstract:
1. A method for manufacturing a field-effect transistor, the method comprising: a main electrode forming step for forming a source, a drain and a gate electrode on an upper portion of a semiconductor substrate; an insulating film depositing step for depositing an insulating film on the semiconductor substrate's upper portion comprising the source, the drain and the gate electrode; a field electrode pattern forming step for forming a multi-layered field electrode pattern having different exposure layers of openings by depositing multi-layered photosensitive films on an upper portion of the insulating film and patterning the films; an insulating film etching step for performing an insulating film etching process using the field electrode pattern as an etching mask so that the insulating film has different stepped heights; and a field electrode forming step for depositing a metal layer by using the field electrode pattern, and forming field electrodes on the upper portion of the insulating film having the different stepped heights through performance of a lift-off process.