Preparation method of wireless charging shielding sheet and shielding sheet

• Main Authors: GUO QINGWEN, WANG JING, XU KEXIN, HUO YUNFANG, ZHU WEIDONG, WU CHANGHE, LIN TAO, HU HUIXIN
• Format: Patent
• Language: Chinese; English
• Published: 07.04.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION; INDUCTANCES; MAGNETS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSFORMERS

The invention discloses a preparation method of a wireless charging shielding sheet and the shielding sheet, and belongs to the technical field of electromagnetic shielding, and the method comprises the steps: S1, carrying out the heat treatment of a soft magnetic material strip, and forming a substrate; S2, forming at least one shielding layer unit; S3, superposing at least one shielding layer unit to form a shielding sheet structure; S4, pressurizing and crushing the shielding sheet structure through a roller with a preset pattern arranged on the surface; and S5, enabling the upper and lowersurfaces of the shielding sheet structure to be attached to a heat dissipation film, and forming a wireless charging shielding sheet, wherein the shielding sheet comprises a shielding sheet structureand a heat dissipation film, the shielding sheet structure comprises at least one shielding layer unit, and each shielding layer unit comprises a base material and colloid. The technical scheme has the beneficial effects that