Patent ID: 9559221
Date: 2017-01-31
CPC Classifications: C23C,H01L,Y02E,Y02P

Claim:
1. A method for producing a solar cell having an antireflective film constructed of a first silicon nitride layer and a second silicon nitride layer having a composition different from the first silicon nitride layer on a surface of a semiconductor substrate, the method comprising: providing a remote plasma-enhanced CVD apparatus including placing a substrate below a first plasma compartment in the deposition compartment, depositing a first silicon nitride layer on the semiconductor substrate from a first plasma flow from a first plasma compartment by generating a plasma flow of ammonia gas, introducing silane gas into the plasma flow and injecting the plasma flow toward the deposition compartment, conveying the substrate to below the second plasma compartment, and depositing a second silicon nitride layer of a different composition than the first silicon nitride layer from a second plasma flow from a second plasma compartment by generating a plasma flow of ammonia gas, introducing silane gas into the plasma flow and injecting the plasma flow toward the deposition compartment, the second plasma compartment having a different flow rate ratio of ammonia gas to silane gas than in the first plasma compartment, wherein each of the first and second plasma compartments is a cylindrical plasma-generating compartment comprising an excitation section for generating the plasma flow of ammonia gas fed from upstream and an activation reaction section disposed downstream of the excitation section for introducing silane gas into the plasma flow, and has end opening which is in fluid communication with the deposition compartment and injects the plasma flow toward the substrate placed below the end opening.