Patent ID: 8361834

Claim:
A method of forming an ohmic contact on a substrate, comprising: depositing a set of silicon particles on the substrate surface, wherein the set of silicon particles comprises one of phosphorous-doped silicon particles and intrinsic silicon particles; heating the substrate in a baking ambient to a baking temperature and for a baking time period in order to create a densified film ink pattern; exposing the substrate to a dopant source in a diffusion furnace with a deposition ambient, the deposition ambient comprising POCl 3 , a carrier N 2 gas, a main N 2 gas, and a reactive O 2 gas at a deposition temperature and for a deposition time period, wherein a PSG layer is formed on the substrate surface; heating the substrate in a drive-in ambient to a drive-in temperature and for a drive-in time period; depositing a silicon nitride layer; depositing a set of metal contacts on the set of silicon particles; heating the substrate to a firing temperature and for a firing time period.