Toyo Gosei Kogyo Co., Ltd.

Agency of Industrial Science and Technology

Keiichi Hayashi

Hideo Kikuchi

Kunihiro Ichimura

Teruhiko Yonezawa

Keiji Ishii

Nariaki Tochizawa

Nobuyuki Kurata

A photosensitive colored resin composition for the formation of colored images includes (a) a resin-based material hardenable with an acid, (b) a photoreactive acid-releasing agent, and (c) a pigment. A colored image formation method of a color filter suitable for liquid crystal display panel applications includes the steps of:

Photosensitive colored resin composition, colored image formation method

The invention provides a novel contrast-enhancing agent for photolithography which is used as an overcoating on a positive-working photoresist layer for enhancing the contrast of the photoresist in a low-contrast exposure to light. The composition comprises, in addition to a watersoluble polymer, e.g., poly(vinyl alcohol), poly(vinyl pyrroilidone) and pullulan, as the binder, a specific photo-bleachable organic compound having, in a molecule, at least one nitrogen-containing heterocyclic aromatic structure represented by the general formula ##STR1## in which Z is a divalent group to form the heterocyclic aromatic ring with the nitrogen atom, X is an anionic group of monovalency and n is a positive integer of, e.g., 1 or 2.

Contrast-enhancing agent for photolithography

Growing community of inventors

Funabashi, Japan

Keiichi Hayashi