POLYMER PARTICLE CONTAINING MAGNETIC MATERIAL, MEDIUM FOR SENSORS, AND SENSOR DEVICE
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United States of America Patent
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Issued Date -
Nov 30, 2023
app pub date -
Feb 27, 2023
filing date -
Feb 28, 2022
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Abstract
A polymer particle containing magnetic material includes a core, an intermediate layer, and a polymer layer. The core includes magnetic fine particles having an average diameter of 5 nm or more and 30 nm or less. The intermediate layer is located outside the core and has a lower concentration of the magnetic fine particles than the core. The polymer layer covers the intermediate layer. A thickness of the intermediate layer is 5% or more and 60% or less of a radius of the polymer particle containing magnetic material.
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