News On Printing Machine

Ceramic copper clad laminate refers to manufacturing a circuit board (PCB) by attaching a layer of copper foil to the surface on a high thermal conductivity ceramic substrate. Its characteristic is that the ceramic-covered copper foil can provide better thermal stability and mechanical strength, so It can be used at high temperatures and pressures, making it an ideal material in high-end electronics such as satellites, aerospace electronics and power electronics.In the process of making circuit boards from ceramic copper clad laminates, printing solder resist is an important step.Thick film screen printing technology is usually used to print solder mask ink or photosensitive solder mask on the surface of the circuit board.After printing, it needs to be heated and cured, and then a chemical corrosion solution is used to deeply etch the parts other than the printed layer to remove unnecessary copper and retain the copper foil required for the circuit, thereby forming a protective layer to prevent the circuit board from being damaged. Components and circuits are short-circuited and corroded, improving the reliability and stability of the circuit board.Process flow 1. First clean the surface of the circuit board

1. Introduction to the pad printing process. Pad printing is an indirect printing technology with a recessable rubber head. By making a specific steel plate pattern, the printing technology uses the rubber head to transfer the etching pattern content to the product. It has now become a printing technology for various object surfaces. A major method of printing and decoration.Principle: The process is very simple. First, the designed pattern is etched on the printing plate, the etching plate is coated with ink, and then most of the ink is transferred to the printed object through the silicone head.Main production problems and solutions: 1. Pad printing font burrs: After pad printing, small feather-like burrs appear on the edges of the fonts, making the fonts enlarged; the ink is too thin and does not dry quickly enough; the humidity is too high; solutions: A.Reduce the amount of ink thinner used; make the ink dry faster; B.The rubber head is equipped with a hot air blowing device; C.Reduce the humidity in the workshop and reduce the etching depth of the steel plate; 2. Deformation of the pad printing pattern: Graphic distortion and deformation appear on the surface of the pad printed product, mostly in the pad printing area.

1. Dimensional accuracy: Dimensional accuracy refers to the degree of difference between the actual size of the printed pattern or component and the designed size.In screen printing, dimensional accuracy refers to the deviation between the actual size and the designed size of the printed pattern, text or component.This deviation is usually within a specific range. For example, if the design size is a 10mm x 10mm square, then the printed square may have a slight size deviation, but it is within an acceptable range.

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