Method of forming fine patterns of a semiconductor device

    公开(公告)号:US10361078B2

    公开(公告)日:2019-07-23

    申请号:US15661418

    申请日:2017-07-27

    Abstract: A method of forming fine patterns includes forming an upper mask layer on a substrate, forming preliminary mask patterns on the upper mask layer, and forming upper mask patterns by etching the upper mask layer using the preliminary mask patterns as etch masks. Forming the upper mask patterns includes etching the upper mask layer by performing an etching process using an ion beam. The upper mask patterns include a first upper mask pattern formed under each of the preliminary mask patterns, and a second upper mask pattern formed between the preliminary mask patterns in a plan view and spaced apart from the first upper mask pattern.

    Magnetic memory devices having sloped electrodes

    公开(公告)号:US09859492B2

    公开(公告)日:2018-01-02

    申请号:US15598605

    申请日:2017-05-18

    Abstract: A patterning method includes forming an etch-target layer on a substrate, forming mask patterns on the etch-target layer, and etching the etch-target layer using the mask patterns as an etch mask to form patterns spaced apart from each other. The etching process of the etch-target layer includes irradiating the etch-target layer with an ion beam, whose incident energy ranges from 600 eV to 10 keV. A recess region is formed in the etch-target layer between the mask patterns, and the ion beam is incident onto a bottom surface of the recess region at a first angle with respect to a top surface of the substrate and is incident onto an inner side surface of the recess region at a second angle with respect to the inner side surface of the recess region. The first angle ranges from 50° to 90° and the second angle ranges from 0° to 40°.

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