METHODS OF USING A SILICON NANOPARTICLE FLUID TO CONTROL IN SITU A SET OF DOPANT DIFFUSION PROFILES

摘要

A method of forming a multi-doped junction on a substrate is disclosed. The method provides doping the front of the substrate with boron atoms, and depositing an ink in a pattern, the ink comprising a set of nanoparticles and a set of solvents, and heating the substrate in a baking ambient to a first temperature of between about 200°C and about 800°C and for a first time period of between about 3 minutes and about 20 minutes 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 POCh, a earner N2 gas, a main N2 gas, and a reactive O2 gas, wherein a ratio of N2 gas to O2 gas is between about 1:1 to about 1.5:1, at a second temperature and for a second time period.