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PCB Board Micro Hole Processing Method
Sep. 02, 2022
With the rapid update of electronic products, PCB Printing has expanded from single-layer boards to double-layer boards and multi-layer boards with more complex requirements for high accuracy. Therefore, there are more and more requirements for the processing of circuit board holes, such as the smaller the hole diameter and the smaller the spacing between holes. It is understood that epoxy resin based composites are widely used in plate factories. The size of holes is defined as small holes with a diameter of less than 0.6mm and micropores with a diameter of less than 0.3mm.
PCB etching process and process control
Aug. 04, 2022
The process of printed circuit board from optical board to displaying circuit pattern is a relatively complex physical and chemical reaction process. This paper analyzes the last step - etching. At present, the typical process of printed circuit board (PCB) processing is "pattern plating". That is, a layer of lead tin anti-corrosion layer is pre plated on the copper foil part to be retained on the outer layer of the board, that is, the graphic part of the circuit, and then the rest of the copper foil is chemically corroded, which is called etching.
How to improve the gold plating thickness of printed boards PCB?
Jul. 21, 2022
Introduction Gold is a yellow precious metal, which has excellent ductility and plasticityand is easy topolish. Gold is chemically stable and insoluble in general acids and bases. With gold as the coating, it has not only good corrosion resistance, but also strong conductivity, high temperature resistance, easy welding, and excellent discoloration resistance. There are many problems in the general thick gold plating process, such as dry film infiltration, rough coating lines, uneven thickness and other phenomena. The gold thickness is not enough to meet some special needs of Aerospace Military printed boards. Many requirements of the gold thickness of some Aerospace Military printed boards meet the category of ultra thick gold. Therefore, it is imperative to research and develop super thick gold plating process and improve the thickness of gold plating.
Advantages of UV LED exposure machine
Jul. 19, 2022
UV LED exposure machine is parallel light source, emitting 365nm/395nm single band light source, without clutter energy consumption, and the energy uniformity can reach 95%, which is suitable for the use of precision circuit industry.
Quality control method of PTH
Jul. 19, 2022
Electroless plating copper is commonly known as copper deposition. The hole metallization technology of printed circuit board is one of the keys of the manufacturing technology of printed circuit board. Strictly controlling the quality of hole metallization is the premise to ensure the quality of final products, while controlling the quality of copper deposition layer is the key. The daily test control methods are as follows:
Influence of current density on electroplating quality
Jul. 14, 2022
For a certain plating solution, the allowable current density often exists in a range of upper and lower limits. If it exceeds this range, the coating quality obtained is often unqualified. Generally speaking, we always hope to allow a wider range of current density.