Mosquito killers can be divided into electronic mosquito killers, airflow mosquito killers and viscous trap mosquito killers. The mosquito killer lamp has the characteristics of simple structure, low price, beautiful appearance, small volume and low power consumption.
With the integration of the PCBA production end and the maturity of the one-stop service model. At present, many electronic product companies are also willing to find a professional supplier who can produce their products completely. However, if it is a new purchase or the first PCBA outsourcing mode, it is likely that many customers do not have a sufficient understanding to cause misunderstandings.
Brief history of development: since the mid-1950s, China has started the development of single-sided printed boards, which were first used in semiconductor radio.
PCB production process is more complex, it involves a wide range of processes, from simple machining to complex machining, there are common chemical reactions, photochemistry, electrochemistry, thermochemistry and other processes, CAD CAM and other knowledge.
We can see a piece of soft film (flexible insulating base material) when we open the key disk of general computer, which is printed with silver white (silver paste) conductive figure and key figure. Because of the general screen missing printing method, we call this printed circuit board flexible silver paste printed circuit board.
Dimensional stability of substrate incoming materials, especially the dimensional consistency between each lamination cycle of the supplier;
Since "temperature" is the main source of plate stress, so as long as the temperature of the reflow furnace is reduced or the speed of temperature rise and cooling of the plate in the reflow furnace is slowed down, the situation of plate bending and plate warping can be greatly reduced However, there may be other side effects, such as solder short circuit.
Generally, the high-rise plate is a system plate, which is thicker, heavier and larger than the conventional multi-layer plate.