Patent ID: 7482631

Claim:
A film formation apparatus comprising: a load chamber; a film formation chamber; and a transfer chamber connected to the load chamber and the film formation chamber, wherein the film formation apparatus is configured to perform a film formation in the film formation chamber using purified electro luminescence material, and wherein the film formation apparatus is configured to produce the purified electro luminescence material by purifying the electro luminescence material by sublimation in the film formation chamber by: controlling a first system to a first temperature to change the electroluminescence material from a first solid into a first gas through evaporation, controlling a second system to a second temperature to change the first gas into a second gas and a second solid, removing the second gas, after removing the second gas, controlling the second system to the first temperature to change the second solid into a third gas through evaporation, controlling a third system to a third temperature to change the third gas into a fourth gas and a fourth solid, and using the fourth gas obtained in the third system as the purified electro luminescent material.