METHOD FOR FORMING LINEAR GROOVE ON STEEL STRIP AND METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET
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United States of America Patent
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app pub date -
Dec 18, 2015
filing date -
Dec 25, 2014
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Abstract
A resist coating for etching use which enables high speed and high accuracy patterning is provided by applying, to a steel strip, a negative resist ink which solidifies upon exposure to light; drying the ink to form a resist coating; then irradiating the steel strip with light while moving a mask member in synchronization with a traveling speed of the steel strip, the mask member being configured to cover a surface of the resist coating to block light, to thereby solidify a portion of the resist coating not covered with the mask member to form a solidified portion; and removing an unsolidified portion other than the solidified portion with a developing solution. Subsequently, by dissolving and removing by etching a portion of the steel strip below the removed portion of the resist coating, a fine and uniform linear groove can be formed in a surface of the steel strip.
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