Molded ferrite sheet, sintered ferrite substrate and antenna module

摘要

The present invention relates to a molded ferrite sheet having opposing surfaces and a thickness in a range of 30 µm to 430 µm, at least one surface of said opposing surfaces having the following surface roughness characteristics (a) to (c):
(a) a center line average roughness is in a range of 170 nm to 800 nm,
(b) a maximum height is in a range of 3 µm to 10 µm, and
(c) an area occupancy rate of cross-sectional area taken along a horizontal plane at a depth of 50 % of the maximum height in a square of side 100 µm is in a range of 10 to 80 %.