Patent ID: 8889224

Claim:
A method of forming a parylene film, comprising: providing a chemical vapor deposition apparatus, comprising: a buffer chamber, having a first valve, a second valve, and a rotative carrying apparatus; an evaporator, connected with the second valve; a pyrolysis chamber, connected with the evaporator through a first pipe, wherein the first pipe has a third valve; and a deposition chamber, connected with the pyrolysis chamber; placing a parylene material in the rotative carrying apparatus of the buffer chamber through the first valve, wherein the parylene material is in a powder form; turning off the first valve and the second valve and balancing a pressure in the buffer chamber and a pressure in the evaporator; turning on the second valve and delivering the parylene material into the evaporator by the rotative carrying apparatus; evaporating the parylene material in the evaporator to form a parylene gas; turning on the third valve for passing the parylene gas into the pyrolysis chamber through the first pipe; pyrolyzing the parylene gas in the pyrolysis chamber to form a parylene monomer; and delivering the parylene monomer to the deposition chamber for deposition so as to form a parylene film, wherein after the parylene material in the buffer chamber is consumed, a refill of the parylene material is performed by turning off the second valve, turning on the first valve and delivering the parylene material the into the buffer chamber without stopping the chemical vapor deposition apparatus.