US Patent No. 9,832,917

ELECTROMAGNETIC WAVE ABSORBING SHEET AND METHOD OF MANUFACTURING THE SAME AND ELECTRONIC DEVICE USING THE SAME


Patent No. 9,832,917
Issue Date November 28, 2017
Title Electromagnetic Wave Absorbing Sheet And Method Of Manufacturing The Same And Electronic Device Using The Same
Inventorship Kil Jae Jang, Seongnam-si (KR)
Dong Hoon Lee, Yongin-si (KR)
Ki Chul Kim, Incheon (KR)
Assignee AMOSENSE CO., LTD., Cheonan-Si (KR)

Claim of US Patent No. 9,832,917

1. An electromagnetic wave absorbing sheet comprising:
at least one layer thin-film magnetic sheet which is broken and separated into a plurality of broken pieces having gaps between
the broken pieces by a flake-processing, the broken pieces having a size of no larger than 3 mm;

a protective film that is adhered on one surface of the thin-film magnetic sheet, wherein the protective film includes a first
adhesive layer provided on the one surface of the thin-film magnetic sheet, and a portion of the first adhesive layer is filled
into the gaps; and

a double-sided tape that is adhered on the other surface of the thin-film magnetic sheet, wherein the double-sided tape includes
a second adhesive layer provided on the other surface of the thin-film magnetic sheet, and a portion of the second adhesive
layer is filled into the gaps,

wherein the thin-film magnetic sheet has an imaginary part permeability component of not less than 50 at 300 MHz.