How to repair circuit board without drawing? 1. "have a plan" To thoroughly understand the principles of some typical circuits, by heart. The drawings are dead, the ideas in the head are alive, can be compared, can reason, can draw inferences from one example to another, and can all be understood. For example, the switching [...]
Solvent cleaning technology for PCB board Solvent cleaning is mainly the use of solvent solubility to remove pollutants. Using solvent cleaning, because of its rapid volatilization, strong dissolution ability, so the equipment requirements are simple. According to the choice of cleaning agent, can be divided into flammable cleaning agent and incombustible cleaning agent, the former [...]
Circuit board of the issues that need to be from the brazing technology, brazing adopts the liquidus temperature is lower than the base solidus temperature of solder metal materials, components and solder will be heated to melt solder, using liquid solder wetting parent metal, filling and joint clearance with parent metal dissolution and diffusion, and [...]
PCB circuit boards, also called printed circuit boards, printed circuit board, is an important electronic components, electronic components to support the body, is the carrier of electronic electrical connection, with insulating board base material, cut into a certain size, with at least one conductive graphics, and cloth have a hole (such as component hole, fastening [...]
4. Other auxiliary materials 1) pure adhesive: this adhesive film is a kind of thermosetting acrylic ester adhesive film, which is composed of protective paper/release film and a layer of adhesive, mainly used for lamination board, soft and hard bonding board, and fr-4 / steel sheet reinforcing board to play an adhesive role. 2) electromagnetic [...]
Flexible circuit board Soft circuit board is also called flexible circuit board, flexible circuit board. Short for flexible board or FPC, it is made of flexible insulation substrate. Is relative to the ordinary hard resin circuit board, the flexible circuit board has the advantages of high wiring density, light weight, thin thickness, less wiring space [...]
Now environmental protection is more and more concerned by people, so the circuit board manufacturing process or use after the waste is an important topic, then the following talk about some of the circuit board recycling process. The whole line composition of circuit board recycling equipment and the process flow of circuit board processing and [...]
7. The air separation unit will conduct air separation classification of the materials after the second iron removal, and separate the light materials. The separated metal powder and heavy materials will be transported to the next process; 8. The high-voltage electrostatic separation unit separates resin fiber from metal powder and heavy material through secondary separation [...]
Key words: circuit board cleaning, circuit board cleaning, PCBA circuit board water-based cleaning, PCBA circuit board water-based cleaning, water-based cleaning technology Introduction: electronic circuit board to achieve water-based cleaning components in the current electronic manufacturing process to achieve the direction of high reliability technical requirements and safe and environmental protection operation mode. This paper discusses [...]
Abrasives abrasive, brush material To clean before the board face and brush copper surface grinding all kinds of used materials, such as polymer nonwoven fabric, nonwoven or mixed with silicon carbide, or the sand of various materials, free and Pumice (Pumice Slurry) are referred to as Abrasives. However, this mixed with coated sand brush material, [...]