Patent ID: 8080167
Filing Date: 2011-12-20
Classification: G11B,Y10T

Abstract:
1. A shaping method of a thin film layer, said thin film layer including a first thin film and a second thin film in side-by-side relationship with said first thin film, the method comprising the steps of: calculating a preliminary etching amount, based on a required etching amount for shaping said first thin film into a given shape, an etching rate of said first thin film, and an etching rate of said second thin film, said preliminary etching amount compensating for a difference between said etching rates to equalize an etching amount of said second thin film to said required etching amount; depositing said second thin film to cover said first thin film; planarizing the surface of said second thin film and the surface of said first thin film until said first thin film is exposed; etching, after the planarizing step, only said second thin film by said preliminary etching amount; and etching, by using ion milling, said thin film layer by said required etching amount to provide a continuous flat surface consisting of the surfaces of said first thin film and said second thin film.