Magnetic Disk of a Data Storage Device with Tempered Growth of Magnetic Recording Layer
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United States of America Patent
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Issued Date -
Dec 22, 2016
app pub date -
Oct 31, 2014
filing date -
Nov 1, 2013
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Abstract
In one aspect, a magnetic data storage device comprises a template layer, an underlayer, and a magnetic recording layer. The template layer includes a patterned array of protruding features. The underlayer is formed on the patterned array of protruding features of the template layer. The underlayer includes an array pattern of protruding features that aligns with the patterned array of protruding features of the template layer. The magnetic recording layer is formed on the underlayer. The magnetic recording layer includes columnar grains of magnetic material separated by grain boundaries of non-magnetic material, with each columnar grain being on a protruding feature of the array pattern of the underlayer, and the grain boundaries being in trenches between the protruding features of the array pattern of the underlayer.
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