General Introduction

Flexible Ferrite Sheet(Magnetic sheet of sintered soft ferrite)

Features of Flexible Ferrite Sheet
Flexible Ferrite Sheet (FLX series) is a sintered Ni-Zn-Cu ferrite magnetic
sheet with high permeability and low loss, based on soft ferrite technologies ofTODA KOGYO.

 High μ′＆ Low μ″

High magnetic permeability and low magnetic loss
resulting in excellent communication characteristic
and charging efficiency.

 High Flexibility

Bendable and do not degrade its magnetic
properties.

 Very Thin

The thickness can be made as thin as 45um,making it suitable for devices that require low profile.

2

Structure of Flexible Ferrite Sheet

PET cover tape (0.01~0.05mm)

Divided ferrite plate (0.05~0.3mm)
Adhesive tape (0.01~0.05mm)
Release liner (PET/Paper)

Optional fabrication:
 Laminated with many kinds of film.
 Complicated shape.
 Adjustment to requested μ′.
 Enable reflow soldering with heat-resistant tape.

3

Product type
FLX series are classified into three types according to frequency.
a) 13.56MHz type
Application: RFID, NFC, FeliCa, WPT※, etc.
b) 100kHz type
Application: WPT※(Qi), Magnetic shielding, RFID, etc.
c) 6.78MHz type
Application: WPT(AirFuelTM), etc.
※WPT：Wireless Power Transfer

4

Ty p i c a l p r o p e r t i e s
For 13.56MHz

GRADE

FLX-950X

FLX-950Y

FLX-950Z

Material

Ni-Zn-Cu Ferrite

Ni-Zn-Cu Ferrite

Ni-Zn-Cu Ferrite

Max. Size (mm)135X135

135X135

135X135

Thickness (mm)0.05～0.30

0.05～0.30

0.05～0.30μ′at 13.56MHz

150

130

110μ″at 13.56MHz

321

Environment

RoHS/Halogen free

RoHS/Halogen free

RoHS/Halogen free5

Ty p i c a l p r o p e r t i e s
Permeability vs frequency of 13.56MHz type13.56MHz6

Ty p i c a l p r o p e r t i e s
For 13.56MHz (high μ’ & low loss type)

Low Loss

7

GRADE

FLX-170V

Material

Ni-Zn-Cu Ferrite

Max. Size (mm)135X135

Thickness (mm)0.05～0.30μ′at 13.56MHz

170μ″at 13.56MHz

2.5

Environment

RoHS/Halogen free

Ty p i c a l p r o p e r t i e s
For 100kHz

GRADE

FLX-221

FLX-146

FLX-247

Material

Ni-Zn-Cu Ferrite

Ni-Zn-Cu Ferrite

Ni-Zn-Cu Ferrite

Max. Size (mm)135X135

135X135

135X135

Thickness (mm)0.05～0.30

0.05～0.30

0.05～0.30μ′at 100kHz

660

380

310

Bm (mT)

252

256

307

Pcv (MW/m3)

47

11

Environment

RoHS/Halogen free

RoHS/Halogen free

RoHS/Halogen free8

Ty p i c a l p r o p e r t i e s
Permeability vs frequency of 100kHz type100kHz9Ty p i c a l p o p e r t i e s
For 6.78MHz

GRADE

FLX-202Q

FLX-170V

FLX-950Z

Material

Ni-Zn-Cu Ferrite

Ni-Zn-Cu Ferrite

Ni-Zn-Cu Ferrite

Max Size (mm)135X135

135X135

135X135

Thickness (mm)0.05~0.30

0.05~0.30

0.05~0.30

μ' at 6.78MHz

220

160

110μ'' at 6.78MHz

3.0

1.00.5

Environment

RoHS / Halogen free

RoHS / Halogen free

RoHS / Halogen free10

Ty p i c a l p r o p e r t i e s
Permeability vs frequency of 6.78MHz type

6.78MHz11

Manufacturing process flow
Ferrite powder process※
α-Fe2O3

NiO、ZnO、CuO

Ferrite sheet process※Ferrite Powder

Binder Powder

MixingWet Mixing

Dispersion

Filtration

Degassing

DryingCoating

Calcination

Slitting

Dry Milling

Half Cutting
Packing
Sintering
Ferrite Powder

Laminating
Dividing
Ferrite Sheet※FLX series are manufactured in an integrated production
process from ferrite powder to ferrite sheet.

12Punching

Solvent

Shipping shape

In addition to the sheet shape, it is also possible to ship half-cut sheet that havebeen trimmed to the desired shape. Tape type are also available.

Sheet

Tape (Reel)

Half-cut sheet
13

【Contact】
TOKYO OFFICE
Shiba Mita Mori Building 6F, 5-13-15 Shiba
Minato-ku,Tokyo 108-0014, JapanTEL. +81-3-5439-6040 FAX. +81-3-5439-6045

https://www.todakogyo.co.jp/english/

webmaster@todakogyo.co.jp

The information presented in this document may be changed without notice.

Ver. Jun 2023