Patent ID: 7923368
Filing Date: 2011-04-12
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of forming a diffusion region, comprising: coating the surface of a wafer with a spacer layer, before the depositing of the nanoparticle ink; depositing a nanoparticle ink on a surface of the wafer to form a non-densified film, the nanoparticle ink having set of nanoparticles, wherein at least some nanoparticles of the set of nanoparticles include dopant atoms therein; heating the non-densified film to a first temperature and for a first time period to remove a solvent from the deposited nanoparticle ink; heating the non-densified film to a second temperature and for a second time period to form a densified film, wherein at least some of the dopant atoms diffuse into the wafer to form the diffusion region; and, removing the densified film and the spacer layer, after heating the non-densified thin film to a second temperature and for a second time period.