Patent ID: 9081286
Filing Date: 2015-07-14
Classification: G03F,Y10T

Abstract:
1. A pattern forming method comprising, in the following order: (1) forming, on a substrate, a resist film using a chemical amplification resist composition including (A) a resin in which the polarity increases under the action of an acid and thereby the solubility in a developer containing an organic solvent decreases, and (B) a compound which generates an acid when irradiated with an actinic ray or a radiation; (2) exposing the resist film, and thereby forming a first line-and-space latent image in which a first group of lines and a first group of spaces are alternately arranged; (3) subjecting the resist film in which the first line-and-space latent image has been formed, to a first heating treatment; (4) exposing the resist film that has been subjected to the first heating treatment, and thereby forming a second line-and-space latent image in which a second group of lines and a second group of spaces are alternately arranged, so that the line direction in the second line-and-space latent image intersects the line direction in the first line-and-space latent image; (5) subjecting the resist film in which the second line-and-space latent image has been formed, to a second heating treatment; and (6) developing the resist film that has been subjected to the second heating treatment, using a developer containing an organic solvent, wherein a contact hole latent image is formed by combining the first line-and-space latent image and the second line-and-space latent image, the first heating treatment is performed after forming the first line-and-space latent image and before forming the second line-and-space latent image, and the chemical amplification resist composition further includes a hydrophobic resin including at least one of a fluorine atom and a silicon atom.