Everyone knows that the circuit board is to turn the designed schematic into a real PCB circuit board. Please don't underestimate the process. There are many things that work well in the project but it is difficult to achieve in the project, or others. Something that can be realized can not be achieved, so it is not difficult to say that it is a PCB board, but it is not an easy task to make a circuit board. The two difficulties in the field of microelectronics are the processing of high-frequency signals and weak signals. In this respect, the level of circuit board production is particularly important. The same principle design, the same components, the circuit boards produced by different people have different As a result, then the quality assurance of the board needs to be considered?

First, to clear the design goal to accept a design task, we must first clear its design goals, is the ordinary circuit board high-frequency circuit board small signal processing circuit board or circuit board with high frequency and small signal processing if it is ordinary As long as the layout and wiring are reasonable and tidy, the mechanical dimensions are accurate. If there are medium load lines and long lines, it must be treated by certain means to reduce the load. The long line should be strengthened. The key is to prevent long-line reflection. When there are more than 40MHz signal lines, special considerations should be made to these signal lines, such as crosstalk between lines. If the frequency is higher, there are stricter restrictions on the length of the wiring.

Second, to understand the function of the components used for the layout and wiring requirements We know that some special components have special requirements in the layout and wiring. Analog signal amplifiers used in LOTI and APH analog signal amplifiers require a smooth ripple small analog small signal. Part of it should be as far away as possible from the power device. The small signal amplification part of the OTI board is also specially equipped with a shield cover to shield the stray electromagnetic interference from the GLINK chip used on the NTOI board. The ECL process consumes a large amount of heat and is very hot. Special considerations must be made in the layout if natural heat dissipation is used.

Third, the consideration of component layout One of the factors to be considered in the layout of components is the electrical performance of the components with close connection relationship as much as possible, especially for some high-speed line layout, it should be as short as possible power signal and Small signal devices should be separated in order to meet the performance of the circuit, but also consider the neat and tidy components placed in the position of the mechanical size socket of the test board. It is also necessary to seriously consider the grounding delay and the transmission delay time on the interconnect line in the high-speed system. The first consideration in system design The transmission time on the signal line has a great influence on the total system speed, especially for high-speed ECL circuits. Although the speed of the integrated circuit block itself is very high, due to the common interconnection on the backplane. The line has a delay of about 2 ns per 30 cm line length, which increases the delay time and greatly reduces the system speed.

Longxiang circuit board is positioned in the professional manufacture of LED aluminum substrate, high-density exposure circuit board, high thermal conductivity aluminum substrate, FR4 composite board and other circuit boards. The company has a professional team engaged in the production of circuit boards for nearly 20 years, with many excellent engineers and professional management personnel, as well as a full set of automated production equipment and precision testing equipment for professional production of circuit boards (aluminum substrates, glass fiber boards). . The company's entire production process is self-sufficient, with a monthly output of 20,000-30,000 square feet per month. Products are widely used in LED commercial lighting, security camera light board, car light lighting, aircraft flashing lighting and new energy batteries.