Patent ID: 7563666
Filing Date: 2009-07-21
Classification: H01L,Y10S

Abstract:
1. A method for forming a diode, the method comprising: forming an oxide layer over a semiconductor substrate doped with a first type dopant; forming a first recess in the oxide layer; forming a silicon-containing plug in the first recess, the silicon-containing plug being doped with a second type dopant having a conductivity opposite to a conductivity of the first type dopant; filling the first recess with a second silicon-containing material doped with the first type dopant; forming a diode junction in the silicon-containing plug with diffused dopants from the second silicon-containing material silicon; forming a second recess in an active region proximate the first recess, the second recess extending through the oxide layer to expose a portion of the active region of the doped semiconductor substrate; filling the second recess with a third silicon-containing material doped with the second type dopant; and forming a programmable resistor in contact with the second silicon-containing material.