Anti-oxidation printed circuit board (PCB) and manufacturing process thereof

Abstract

The invention discloses an anti-oxidation printed circuit board (PCB) and a manufacturing process thereof, and relates to the technical field of printed circuit board manufacturing. The manufacturing process comprises the steps of oil removal, water washing, etching, water washing, chemical nickel plating, polishing, protection treatment and electroplating of a magnesium thin layer. The surface of the PCB is cleaned by an alkaline degreasing agent, and the degreasing agent is mixed with water in a ratio of 1: (10-15) to prepare a working solution; after uniform stirring, using at normal temperature, the PCB is completely soaked, and the ph value is regularly checked in the using process so that the ph value of the degreasing solution is kept at about 8; after 10 minutes, washing is performed with clear water, wherein the washing must be clean; and the PCB is put into sulfate to be soaked for 5 minutes and then is washed with clear water again. The process has the advantages that the oxidation resistance and corrosion resistance of the conductive holes of the anti-oxidation PCB are improved, the yield of the PCB after long-term storage is improved, workpieces are convenient to polish, electroplating is switched at any time, and production of the PCB is more automatic.

Description

technical field [0001] The invention relates to the technical field of printed circuit board manufacturing, in particular to an anti-oxidation PCB printed circuit board and a manufacturing process thereof. Background technique [0002] A printed circuit board is an important electronic component and a provider of electrical connections for electronic components. The output value of the PCB industry accounts for more than a quarter of the total output value of the electronic component industry. It is the industry with the largest proportion among various electronic component subdivision industries. It is widely used in automotive electronics, communication equipment, medical electronics, industrial control equipment, clean energy, and smart security. In many fields such as aerospace and military products, the oxidation resistance of PCB printed circuit boards will affect the quality and service life of printed circuit boards. [0003] The prior art has the following disadvan...

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Problems solved by technology

[0003] The prior art has the following disadvantages: During long-term storage of PCB printed circuit boards, due to the copper covering in the surface conductive holes, they are in contact with the air for a long time, and there are no protective measures, resulting in serious oxidation and affecting the connection between the circuit board and electronic components. Conductivity, the existing PCB printed circuit boards cannot guarantee good storage immediately after leaving the factory, and the conductive holes will still be in contact with the air. Sometimes the moisture and oil in the air will enter the conductive holes during the transportation of PCB printed circuit boards. It leads to oxidation of the conductive holes of the PCB printed circuit board under long-term storage, so the PCB printed circuit board should have measures to prevent the oxidation of the conductive holes when it leaves the factory

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