Canon Anelva Corporation

Mihoko Nakamura

Yoshimitsu Kodaira

Isao Takeuchi

Masayoshi Ikeda

Tomohiko Toyosato

Kazuhiro Kimura

The present invention has an objective to provide a processing method and an ion beam processing apparatus capable of inhibiting deposition of redeposited films even for fine patterns. In an embodiment of the present invention, ion beam processing is performed such that an etching amount of an ion beam incident in extending directions of pattern trenches formed on a substrate is made larger than the etching amount of the ion beam incident in other directions. This processing enables fine patterns to be processed while inhibiting redeposited films from being deposited on the bottom portions of the trenches of the fine patterns.

Ion beam processing device

Ion beam processing method and ion beam processing apparatus

A production process in which in an element isolation process for a magnetoresistive effect element, a re-deposited film adhered to a side wall of the element is efficiently removed by ion beam etching. Ion beam etching is performed while a substrate located being inclined relative to the grid is rotated. In the ion beam etching, an energy amount of an ion beam entering from a direction in which a pattern groove formed on the substrate extends is increased larger than the energy amount of the ion beam entering from another direction by controlling a rotation speed of the substrate, and the re-deposited film adhered to the side wall of the magnetoresistive effect element formed on the substrate is efficiently removed by etching.

Process for producing magnetoresistive effect element and device producing method

In a method for manufacturing the functional element, a protective film covering an underlayer, a patterned multilayer film, and a patterned cap layer are formed, and the underlayer is then processed without newly forming a resist. Thereby, an electrode can be formed in steps less than ever before. Since the protective film formed on the patterned multilayer film and the patterned cap layer is used as a mask, the problem of the misregistration can be prevented.

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Chofu, Japan

Mihoko Nakamura