Patent ID: 7682923

Claim:
A method of forming a metal trench pattern in a thin-film device, comprising the steps of: depositing an electrode film on a substrate or on a base layer; forming a resist pattern layer having a trench-forming portion used to make a trench pattern, on the deposited electrode film; forming a metal layer for filling spaces in said trench-forming portion and for covering said trench-forming portion, by performing plating through the formed resist pattern layer using the deposited electrode film as an electrode; removing a part of the resist pattern layer and a part of the electrode film, which are uncovered by the formed metal layer; depositing a peripheral area layer on the metal layer; planarizing top surfaces of the formed metal layer and the deposited peripheral area layer until said trench-forming portion of said resist pattern layer is at least exposed; and removing the exposed trench-forming portion of said resist pattern layer.