Patent ID: 9323154
Filing Date: 2016-04-26
CPC Classification: G03F,H01L

Claim Text:
1. A method of preparing an electronic device, comprising: (a) applying a coating layer of an organic antireflective composition on a substrate, wherein the antireflective composition comprises a resin that comprises photoacid-labile groups material that produces alkaline-soluble groups upon thermal treatment or exposure to activating radiation; (b) exposing to activating radiation or thermally treating the antireflective composition coating layer to produce COOH groups; (c) crosslinking the antireflective composition coating layer with the alkaline-soluble groups; (d) applying a photoresist composition layer above the crosslinked antireflective composition coating layer; (e) exposing the applied photoresist composition coating layer to patterned activating radiation; and (f) treating the exposed photoresist layer with an aqueous alkaline developer composition to develop the patterned image in both the photoresist composition layer and the underlying antireflective composition coating layer.