The actual printed circuit board is composed of copper foil layer, printed data layer and silk screen layer. The copper foil layer includes the signal layer and internal electrical layer in the software design, which mainly completes the electrical connection characteristics of the circuit. Generally, the number of layers of copper foil is defined as [...]
Three proofing paint is a specially formulated coating used to protect circuit boards and related equipment from environmental erosion. Three proofing paint has good high and low temperature resistance; After curing, it forms a transparent protective film, which can protect the circuit from damage under the conditions of chemical substances (such as fuel, coolant, etc.), [...]
PCB, namely printed circuit board, is one of the important components of the electronic industry. Almost every kind of electronic equipment, from electronic watches and calculators to computers, communication electronic equipment and military weapon systems, as long as there are electronic components such as integrated circuits, printed boards should be used in order to make [...]
The PCB circuit board takes the insulating board as the base material and is cut into a certain size. At least one conductive pattern is attached on it, and holes (such as component holes, fastening holes, metallization holes, etc.) are arranged to replace the chassis of electronic components of previous equipment and complete the interconnection [...]
With the development of science and technology, the requirements for the measurement accuracy of various components are becoming higher and higher. Therefore, the requirements for the image measuring instrument, an accuracy measuring instrument, are becoming more and more stringent. The image measuring instrument is the product of the perfect combination of traditional optical projection and [...]
Modern has very high requirements for electrical appliances and electronics. It must be safe to use, otherwise it cannot enter the market in large quantities. In order to avoid power connection between circuit board and circuit, circuit board potting adhesive is generally used for potting. The potted circuit board is wrapped by adhesive layer, which [...]
With the continuous development of science and technology, electronic products are developing towards portability, miniaturization and high performance. The quality of packaging will directly affect the cost and performance of electronic products. Using plasma cleaning technology to remove pollutants on the material surface and improve surface activity has become an indispensable process in packaging. Due [...]
Analysis on several forms and causes of unqualified road slab quality Circuit board quality problems generally include circuit short circuit, open circuit, green oil foaming, green oil falling, substrate delamination, board warping, pad falling, poor tin loading and open circuit of circuit board after aging. The basic reason for these common circuit board quality problems [...]
Why is the quality of the same FPC FPC sample often very different from different manufacturers. FPC flexible circuit boards produced by some manufacturers are neat and have excellent touch, golden face and neat reinforcement; The FPC flexible circuit board produced by some manufacturers has all kinds of problems, such as burr, oxidation, uneven reinforcement, [...]
When the circuit board is spliced and connected, the insufficient width of the connecting bridge will cause the deformation of the circuit board. If the width size and stiffness design of the connecting bridge are insufficient, the deformation of the PCB will be exacerbated. Experiments in the circuit board manufacturing factory show that the stiffness [...]