Preparation technology of ceramic shielding sheet for wireless charging and ceramic shielding sheet

Abstract

The invention discloses a preparation technology of a ceramic shielding sheet for wireless charging. The preparation technology comprises the following steps: step 1, carrying out heat treatment on awound soft magnetic material strip; step 2, crushing the wound soft magnetic material strip subjected to the heat treatment into powder and preparing the powder into slurry; step 3, coating a naked surface of a ceramic substrate with the slurry to form a shielding layer with a certain thickness; sintering the ceramic substrate with the shielding layer to obtain the ceramic shielding sheet. The invention further discloses the ceramic shielding sheet; the ceramic shielding sheet comprises the ceramic substrate, the shielding layer and a PET (Polyethylene Terephthalate) film, wherein one naked surface of the ceramic substrate is coated with the shielding layer by utilizing a coating technology or a printing technology; the PET film is stuck on the outer surface of the shielding layer. The preparation technology of the ceramic shielding sheet, provided by the invention, is simple and feasible and high in integration automatic degree; the produced ceramic shielding sheet has thin thickness,a good shielding capability and high charging efficiency; the product has high working stability, and procedures and material cost are greatly saved.

Description

technical field [0001] The invention relates to the technical field of wireless charging and electromagnetic shielding, and more specifically, the invention relates to a preparation process of a ceramic shielding sheet for wireless charging with a simple process. The invention also relates to a ceramic shielding sheet for wireless charging. Background technique [0002] With the rapid development of science and technology, people's work and life are increasingly dependent on electronic equipment. Walking on the street, almost everyone is looking at their mobile phones or using other electronic devices. Many people feel that the battery power is not enough and they are unwilling to carry a bulky power bank. If there is a mobile phone signal, it can be charged anytime, anywhere. How good it would be, not to mention the need for cumbersome data cable charging. Although it has not yet been realized to charge freely anytime and anywhere on the street, a new wireless charging te...

AI Technical Summary

Problems solved by technology

The above process is complicated and the process is long, and the adhesive layer strip is passed through a strong acid and alkali 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 and alkali solutions, but the performance of the adhesive layer changes and the gaps are not easy to dry. , the strip is easy to oxidize, 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, which is contrary to the government's advocacy of green environmental protection.

Poor performance consistency and low charging efficiency

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