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Newest/most progressed thinnest way to put ferrite

April 18, 2012

Q. Hi,

I'm Arye Nudelman HW Engineer.

I would to ask you if next paragraphs info is part of your company service.

I'm doing a research and optimization for the Newest/most progressed thinnest way to put ferrite that it will have thinnest layer, lower that 0.1 mm on PCB/flex.
For example to grow it on the copper instead of the solder mask/ cover layer of the circuit that shall cover our PCB/Flex planer coil, or ITO, spin spray, coating, etc.

As first step we would like to manufacture prototypes while final step is mass production of 1-5 million units per year.
Currently implemented ferrite 0.4 mm is with the following parameters:
Saturation flux density: 0.49T
Permeability: 2400u
Operation frequency: 100-500KHz

If you see your company may be suitable for this issue I would be glad to have an initial technical discussion regarding the project.

Example of desired design that shall be even thinner

ferrite layer  ferrite        40    um

Plating Copper                15    um

PTH   Copper L1  FCCL         18    um

      Polyimide               12    um

      Copper L2               18    um

Plating Copper                15    um

total                        118    um

Thanks and best regards,

Arye Nudelman
Neve ilan, Israel