Patent ID: 7632760
Filing Date: 2009-12-15
Classification: H01L

Abstract:
1. A method for enhancing breakdown voltage stability in a high voltage semiconductor device comprising the steps of: providing a body of semiconductor material of a first conductivity type and having a resistivity greater than or equal to about one ohm-cm, wherein the body of semiconductor material has a first major surface; forming a first dielectric layer in proximity to the first major surface; forming a first doped region of a second conductivity type in the body of semiconductor material, wherein the first doped region and the first dielectric layer are in proximity to each other, and wherein the first doped region forms a high voltage junction with the body of semiconductor material; and forming a spin-on glass layer overlying the first dielectric layer, wherein the spin-on glass layer has a refractive index less than 1.4, and wherein the spin-on glass layer is configured as a charge stabilization layer that provides the enhanced breakdown voltage stability, and wherein the spin-on glass layer terminates in proximity to an edge of the first doped region without overlying the entire first doped region.