Patent ID: 8338275
Filing Date: 2012-12-25
Classification: H01L,Y02E

Abstract:
1. A method of forming a metal contact on a silicon substrate, comprising: depositing a nanoparticle ink on a substrate surface in a pattern, the nanoparticle ink comprising a set of nanoparticles and a set of solvents; heating the substrate in a baking ambient to a first temperature and for a first time period in order to create a densified nanoparticle layer with a nanoparticle layer thickness of greater than about 50 nm; depositing an SiN exposing the substrate to an etchant that is selective to the densified nanoparticle layer for a second time period and at a second temperature in order to create a via; and forming a metal contact in the via, wherein an ohmic contact is formed with the silicon substrate.