US 11,723,182 B2
Shielding film and method for producing a shielding film
Christian Polak, Blankenbach (DE); and Matthias Schmidt, Dreieich (DE)
Assigned to VACUUMSCHMELZE GMBH & CO. KG, Hanau (DE)
Filed by VACUUMSCHMELZE GMBH & CO. KG, Hanau (DE)
Filed on Oct. 30, 2018, as Appl. No. 16/175,815.
Application 16/175,815 is a division of application No. 14/782,011, granted, now 10,149,416, previously published as PCT/IB2013/060102, filed on Nov. 13, 2013.
Claims priority of application No. 10 2013 103 268.0 (DE), filed on Apr. 2, 2013.
Prior Publication US 2019/0133005 A1, May 2, 2019
Int. Cl. H05K 9/00 (2006.01); H01F 27/36 (2006.01)
CPC H05K 9/0075 (2013.01) [H01F 27/36 (2013.01); H01F 27/366 (2020.08); H05K 9/0088 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for manufacturing a shielding film, comprising the following steps:
providing a band of an amorphous soft magnetic alloy;
wrapping the band into a coil on a substrate;
thermally treating the band in the form of the coil at a temperature of 500° C. to 600° C. for 1 minute to 1 hour under an N2— or H2-containing atmosphere and under the Earth's magnetic field, thereby creating a nanocrystalline soft magnetic band with a round hysteresis loop;
applying an adhesive layer to at least one side of the nanocrystalline soft magnetic band by a reel-to-reel process; and
wherein the band is structured by breaking after applying the adhesive layer.