Method of forming resist pattern
View Patent ↗The present invention relates to a method of forming a resist pattern for obtaining an electronic device in which a development defect is eliminated, and aims at providing a process that is simple and low-cost, and can impart a high hydrophobicity capable of high-speed scan. It relates to a method of forming a resist pattern including the steps of: providing immersion exposure to a resist film; solubilizing the resist film subjected to the immersion exposure in an alkaline developer; developing the resist film solubilized in the alkaline developer by alkali immersion; and performing a deionized water rinse treatment on the developed resist film in this order, wherein the step of solubilization in the alkaline developer is performed by exposing the resist film subjected to the immersion exposure to ozone gas without irradiating ultraviolet rays (hereinafter, sometimes referred to as ozone treatment).
1. A method of forming a resist pattern comprising the steps, in order recited, of:
providing immersion exposure to a resist film;
solubilizing the resist film subjected to the immersion exposure in an alkaline developer;
developing the resist film solubilized in the alkaline developer by alkali immersion; and
performing a deionized water rinse treatment on the developed resist film,
wherein the step of solubilization in the alkaline developer is performed by exposing the resist film subjected to the immersion exposure to ozone gas without irradiating ultraviolet rays.
2. The method of forming a resist pattern according to claim 1 , wherein the step of solubilization in the alkaline developer is performed simultaneously with a post-exposure bake treatment, and thereafter performs the step of development by the alkali immersion and the step of the deionized water rinse treatment.
3. The method of forming a resist pattern according to claim 1 , wherein the step of solubilization in the alkaline developer is performed after a post-exposure bake treatment, and thereafter performs the step of development by the alkali immersion and the step of the deionized water rinse treatment.
4. The method of forming a resist pattern according to claim 1 , wherein the step of solubilization in the alkaline developer is performed just before a post-exposure bake treatment, and thereafter performs the step of development by the alkali immersion and the step of the deionized water rinse treatment.
5. The method of forming a resist pattern according to any of claims 1 to 4 , wherein the step of solubilization in the alkaline developer is performed using an ozone gas generator, and an apparatus for solubilization treatment in alkaline developer provided with a heating member capable of placing a wafer therein and heating the wafer, a gas exhaust port and a gas feed port, and the ozone gas generator or the apparatus for solubilization treatment in alkaline developer is provided with a mechanism for preventing the resist film from being directly irradiated with light including ultraviolet rays used for generating the ozone gas.