Patent ID: 6707075
Filing Date: 2004-03-16
Classification: H01L,Y02E,Y02P

Abstract:
A method of forming an avalanche trench optical detector device on a semiconductor substrate, comprising the steps of:forming a first set and a second set of trenches in the substrate, wherein trenches of the first set are alternately disposed with respect to trenches of the second set; filling the trenches with a doped sacrificial material; annealing the device to form a multiplication region in the substrate; etching the doped sacrificial material from the first set of trenches; filling the first set of trenches with a doped material of a first conductivity; etching the doped sacrificial material from a second set of trenches; filling the second set of trenches with a doped material of a second conductivity; and providing separate wiring connections to the first set of trenches and the second set of trenches.