Patent ID: 6383836
Filing Date: 2002-05-07
Classification: H01L,Y10S

Abstract:
A method for manufacturing a diode, said diode comprising:(a) a first-conductivity-type first region having a first impurity concentration; (b) a first conductivity-type second region adjoining said first region, said second region having a second impurity concentration that is lower than said first impurity concentration; (c) a generally ring-like second-conductivity-type third region in a surface layer of said second region; (d) a first main electrode in contact with said first region; (e) a first-conductivity fifth region in a surface layer of said second region located inside said second-conductivity-type third region, said fifth region having a resistivity that is higher than that of said second region, and having a thickness that is smaller than a diffusion depth of said third region; and (f) a third main electrode which contacts with said fifth region, so as to form a Schottky junction; wherein said fifth region is formed by implanting second-conductivity-type ions in a dose amount of not larger than 1Ã—1012 cmâˆ’2, and conducting heat treatment.