Patent ID: 8877291

Claim:
A method of manufacturing a thin film in a film forming apparatus, the film forming apparatus comprising: an evaporation chamber; a film forming chamber which is provided adjacent to the evaporation chamber and in which a substrate is provided; vacuum pumps respectively connected to the evaporation chamber and the film forming chamber; a nonreactive gas introduction mechanism connected to one or both of the evaporation chamber and the film forming chamber; an evaporation source provided in the evaporation chamber, holding a film formation material, and having a semi-sealed structure including an opening face; a moving mechanism configured to cause the evaporation source to move such that the opening face is able to be located close to the substrate; and a conductance variable structure provided between the evaporation chamber and the film forming chamber, the method comprising: a first step of evacuating the film forming chamber and the evaporation chamber; after the first step, a second step of suppressing evaporation of the film formation material by introducing a nonreactive gas to the evaporation chamber to adjust pressure in the evaporation chamber to predetermined pressure or more in a state where differential pressure between the evaporation chamber and the film forming chamber is able to be secured by the conductance variable structure; after the first step, a third step of introducing the nonreactive gas to the film forming chamber to adjust the pressure in the film forming chamber to the predetermined pressure or more in a state where the differential pressure between the evaporation chamber and the film forming chamber is able to be secured by the conductance variable structure; after the second step and the third step, a fourth step of activating the conductance variable structure to cancel the state where the differential pressure between the evaporation chamber and the film forming chamber is able to be secured; after the fourth step, a fifth step of causing the evaporation source to move by the moving mechanism such that the opening face passes through the conductance variable structure that has cancelled the state where the differential pressure between the evaporation chamber and the film forming chamber is able to be secured and is located close to the substrate; and after the fifth step, a sixth step of canceling suppression of the evaporation of the film formation material and starting film formation on the substrate by decreasing the pressure in each of the film forming chamber and the evaporation chamber to less than the predetermined pressure, wherein during the fourth and fifth steps, each of the pressure in the film forming chamber and the pressure in the evaporation chamber is maintained at the predetermined pressure or more, and wherein when the conductance variable structure is activated to cancel the state where the differential pressure between the evaporation chamber and the film forming chamber is able to be secured, the opening face of the evaporation source faces the substrate.