Patent ID: 7615393
Filing Date: 2009-11-10
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of forming a multi-doped junction on a substrate, the method comprising: providing the substrate doped with boron, the substrate having a front surface with a first surface region and a second surface region; depositing a first set of nanoparticles comprising a first dopant on the first surface region; heating the substrate in an inert ambient to a first temperature for a first time period, thereby creating a first densified film and a first diffused region having a first diffusion depth in the substrate beneath the first surface region; exposing the substrate to a diffusion gas comprising phosphorous at a second temperature and for a second time period, thereby creating a PSG layer on the second surface region of the front surface and a second diffused region having a second diffusion depth in the substrate beneath the second surface region, wherein the first diffused region is proximate to the second diffused region; and exposing the substrate to an oxidizing gas at a third temperature and for a third time period, thereby forming a SiO