Patent ID: 6081019
Filing Date: 2000-06-27
Classification: H01L

Abstract:
A diode comprising multiple epitaxial layers of semiconducting material including:a first outer layer (4) of heavily doped p-type material;an active layer (2) of lightly doped semiconducting material; anda second outer layer (3) of heavily doped n-type material,characterised by the diode further comprising:a first buffer layer (8) of lightly doped p-type material; anda second buffer layer (9) of lightly doped n-type material;the layers (2, 3, 4, 8, 9) being arranged in a stack with the first buffer layer (8) being sandwiched between the active layer (2) and the first outer layer (4) and forming, when a reverse bias is applied, an extracting interface with each, and the second buffer layer (9) being sandwiched between the active layer (2) and the second outer layer (3) and forming, when a reverse bias is applied, an excluding interface with each.