Patent ID: 6225653
Filing Date: 2001-05-01
Classification: H01L

Abstract:
A semiconductor component with at least one Zener diode and at least one Schottky diode in parallel to it, comprising:a low-doped epitaxial layer (5) of a first type of doping on a highly-doped substrate (4) of the same type of doping,a zone (6) of a second type of doping diffused into the epitaxial layer (5), anda Schottky junction (13) formed between the epitaxial layer (5) and a Schottky metal (11) on a side of the epitaxal layer (5) facing away from the substrate (4), whereina highly-doped layer (15) of a second type of doping is introduced into some areas of the highly-doped substrate (4) of the first type of doping to form a pn Zener junction (16),a low-doped diffused area (17) of the second type of doping extends from the highly-doped layer (15) in the substrate (4) into the epitaxial layer (5) as far as a substrate of the epitaxial layer (5), andthe Schottky metal (11) at least partially covers the low-doped, diffused area (17) to form another Schottky junction (18) between the area (17) and the Schottky metal (11) and the Schottky junction (13) between the Schottky metal (11) and the epitaxial layer (5).