Patent ID: 7144684
Filing Date: 2006-12-05
Classification: G03F

Abstract:
1. A method for forming a pattern that uses a photomask, comprising the steps of: forming a resist film on a substrate; irradiating the resist film with exposure light via the photomask; and developing the resist film irradiated with the exposure light so as to pattern the resist film, wherein the photomask comprises on a transparent substrate: the semi-light-shielding portion and the light-transmitting portion transmit the exposure light in a same phase, the peripheral portion transmits the exposure light in a phase opposite to that of the semi-light-shielding portion and the light-transmitting portion, a phase shift film that has a transmittance that allows the exposure light to be transmitted partially and transmits the exposure light in a phase opposite to that of the peripheral portion is formed on the transparent substrate in a formation region for the semi-light-shielding portion, and a surface of the transparent substrate in a formation region for the peripheral portion is exposed.