Technology for producing hot-pressing-resisting insulation mirror plate based on impregnation technology

Abstract

The invention discloses a technology for producing a hot-pressing-resisting insulation mirror plate based on an impregnation technology. The technology comprises the following steps that 1, a stainless steel plate is subjected to acid pickling and degreasing and then is dried; 2, mixed powder is heated and molten in the inert gas atmosphere, and melting liquid is obtained; 3, the stainless steel plate is impregnated in the melting liquid and then taken out to be cooled, and a pre-coating plate is obtained; and 4, after the pre-coating plate is oxidized, the insulation mirror plate is obtained. The mixed powder comprises, by weight, 100 parts of aluminum, 30-32 parts of zirconium, 10-12 parts of calcium and 4-6 parts of iron. According to the scheme, the conventional impregnation technology is improved, and the brand-new technology for producing a mirror plate coating is obtained; and the formula of the molten mixed powder is improved so that high-frequency use of the manufactured mirror plate can be guaranteed under the conditions of high temperature and high pressure, 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 production process for a heat-resistant and pressure-resistant insulating mirror plate based on an impregnation process. 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 f...

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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 technology of this coating is not yet mature.

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