Depression-preventing low-swell-shrinking mirror plate

Abstract

The invention discloses a depression-preventing low-swell-shrinking mirror plate which adopts a stainless steel plate as a substrate, and a coating is arranged on the surface of the stainless steel plate. The coating comprises 30-32 parts by weight of an aluminum oxide, 30-32 parts by weight of a hafnium oxide, 30-32 parts by weight of a silicon oxide, 6-8 parts by weight of a europium oxide, 6-8 parts by weight of a silver oxide, 2-4 parts by weight of a palladium oxide and 2-4 parts by weight of a bismuth oxide. According to the scheme, the stainless steel plate is taken as the substrate, the coating on the outer surface of the stainless steel plate takes aluminum oxide, hafnium oxide and silicon oxide as the core, and multiple oxides having a synergistic effect are introduced, so that the surface strength, the surface smoothness, the hot pressing resistance and the depression-prevention performance of the coating of the mirror plate under high pressure are improved effectively; by means of boron nitride, ruthenium oxide and zinc oxide added to the coating, the expansion extent of the coating for larger temperature difference and pressure difference can be improved effectively, and accordingly, bad influence of the overall swell and shrinking of the mirror plate on the using effect and the service life of the mirror plate can be avoided effectively.

Description

technical field [0001] The invention relates to an insulating plate, in particular to an anti-sag low-expansion mirror plate coated with a modified coating on the surface. Background technique [0002] When manufacturing the main base material 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 when they are pressed together, t...

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Problems solved by technology

[0003] The biggest difference between the mirror board and the ordinary insulating board is that there is a special coating on the surface, which has a great influence on the performance of the mirror board. In the lamination process, the performance requirements of the mirror board 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 of the mirror plate must still be very smooth and smooth after repeated hot pressing, without depressions on the surface, and no expansion and contraction, while currently in the prior art This requirement cannot be realized yet. Generally, after the mirror plate of the prior art can be used about 150 times at normal temperature, the surface begins to be sunken, causing the mirror plate to fail, and it can only be used about 60 times at high temperature. fail

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