Magnetic isolation sheet applied to wireless charging and near field communication (NFC) and fabrication process of magnetic isolation sheet

Abstract

The invention discloses a magnetic isolation sheet applied to wireless charging and near field communication (NFC). The magnetic isolation sheet comprises at least one magnetic isolation unit, whereinthe magnetic isolation unit comprises a soft magnetic strip and a double-side adhesive tape, wherein the soft magnetic strip is of a sheet structure with two exposed surfaces, the double-side adhesive tape covers one of the exposed surfaces, and the other exposed surface of the soft magnetic strip is pressed to form a mesh-shaped line. The invention also discloses a fabrication process of the magnetic isolation sheet applied to wireless charging and NFC. The fabrication process comprises the steps of constructing a magnetic isolation unit, in which the double-side adhesive tape is pasted ontoone of the exposed surfaces of the soft magnetic strip by taking the soft magnetic strip of the sheet structure with the two exposed surfaces as an element, and the other exposed surface of the softmagnetic strip is pressed to form the mesh-shaped line; and constructing the magnetic isolation sheet. The magnetic isolation sheet applied to wireless charging and NFC, fabricated by the fabricationprocess has the advantages of thin thickness, good magnetic isolation capability, high charging efficiency, NFC working frequency stability and high product stability, and the process and the materialcost are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of magnetic isolation sheets, and more specifically, the invention relates to a magnetic isolation sheet applied to wireless charging and NFC. The invention also relates to a preparation process of a magnetic isolation sheet applied to wireless charging and NFC. Background technique [0002] Wireless charging technology, the English name is Wireless charging technology, also known as inductive charging, non-contact charging, is a new charging technology derived from wireless power transmission technology. Wireless charging technology uses near-field induction, and the wireless charger transmits energy to the device that needs to be charged. The device uses the received energy to charge the battery and provide energy for the operation of the device itself. Since energy is transferred between the wireless charger and the charging device through inductive coupling, no wire connection is required. [0003] The...

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Problems solved by technology

The above process is complicated and the process is long, and the strip material of the adhesive layer passes through a strong acid-base solution and an etching solution. Generally, the coil substrate of the etching method is a PI substrate that is resistant to high temperature and strong acid-base solution, but there are gaps that are not easy to dry. The problem of easy oxidation, the cost is high, and they are all treated with chemicals and heated, which seriously pollutes the environment and is not conducive to environmental protection. It is contrary to the government's advocacy of green environmental protection. The performance consistency is poor and the charging efficiency is low.

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