Thermal conductive electromagnetic wave absorbing sheet
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United States of America Patent
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Jan 16, 2018
Grant Date -
May 5, 2016
app pub date -
Oct 30, 2015
filing date -
Oct 31, 2014
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Abstract
A thermal conductive electromagnetic wave absorbing sheet to be provided includes: a polymer including acrylate ester as a monomer; a metal magnetic oxide; and flame retardant filler subjected to surface treatment. The metal magnetic oxide includes a small-diameter metal magnetic oxide with an average particle diameter of 1 to 10 μm and a large-diameter metal magnetic oxide with an average particle diameter of 50 to 100 μm. A mixing ratio between the small-diameter metal magnetic oxide and the large-diameter metal magnetic oxide is in a range of 9:13 to 15:7 in volume ratio. The small-diameter metal magnetic oxide and the large-diameter metal magnetic oxide are contained by 55 to 60 vol % in total in the entire thermal conductive electromagnetic wave absorbing sheet. The flame retardant filler subjected to the surface treatment is contained by 8 to 10 vol % in the entire thermal conductive electromagnetic wave absorbing sheet.
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