Method for manufacturing long-life insulation mirror plate based on plasma spraying

Abstract

The invention discloses a method for manufacturing a long-life insulation mirror plate based on plasma spraying. The method comprises the following steps that 1, a substrate to be coated is subjected to acid pickling and degreasing and then is dried; 2, corona treatment is carried out on the substrate; and 3, coating powder is sprayed to the surface of the substrate through a plasma spraying method, wherein the coating powder comprises, by weight, 100 parts of titanium oxide, 30-32 parts of barium oxide and 10-12 parts of boric oxide. According to the scheme, the formula of the coating powder is brand-newly designed according to a plasma spraying technology, and can be well suitable for the plasma spraying technology, a compact spraying coating is formed on the surface of the substrate, high-frequency use of the insulation mirror plate can be guaranteed during hot pressing at high temperature and high pressure through the coating, no expansion or shrinkage happens, the surface is flat and resistant to wear, and no sinking happens.

Description

technical field [0001] The invention relates to a method for manufacturing an insulating mirror plate, in particular to a method for manufacturing a high-life insulating mirror plate based on plasma spraying. Background technique [0002] When manufacturing the main substrate of the circuit board (PCB), it is necessary to use a voltage machine to laminate multiple layers of different materials. The working principle of this voltage machine is to heat the processed glue through copper foil (or aluminum foil) Adhesive resin material, and press the multi-layer material by applying a certain pressure for at least half an hour, so as to make the circuit board base material, and in the process of pressing with an electric machine, due to cost considerations, a single pressing operation often needs to be done at the same time. Pressing multiple pieces of circuit board substrates, and in order to prevent multiple pieces of circuit board substrates from being affected by each other w...

AI Technical Summary

Problems solved by technology

[0003] The biggest difference between the mirror plate and the ordinary insulating plate is that there is a dense coating on the surface, which has a great influence on the performance of the mirror plate. In the lamination process, the performance requirements of the mirror plate are very high. During operation, both high temperature heat (greater than 300°C) and strong pressure (greater than 50MPa) are generated, which requires the mirror plate to have excellent thermal pressure resistance, that is, the mirror plate needs to have a very high limit temperature resistance And the ultimate pressure resistance, and, more importantly, the surface coating of the mirror plate must remain very smooth and smooth after repeated hot pressing, without depressions on the surface, and no expansion and contraction. This requirement cannot be realized in the process. Generally, the mirror plate of the prior art can be used for about 100 times at room temperature, and then the surface begins to be sunken, resulting in the failure of the mirror plate, and it can only be used about 50 times at high temperature. has expired

The main reason why the existing technology cannot meet this requirement is that the preparation process of this coating is not yet mature, more specifically, the combination of the coating formula and the coating construction process is not yet perfect.

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