When the field strength of electromagnetic field exceeds a certain limit and the operation time is long enough, it may endanger human health. It can also interfere with other electronic devices and communications. All of these need to be protected.
The simplest multilayer soft PCB is a three-layer soft PCB formed by two layers of copper shielding on both sides of a single-sided PCB. This three-layer soft PCB is electrically equivalent to a coaxial wire or a shielded wire.
A perfect PCB board not only needs to do the component selection and setting is reasonable, but also needs to have good signal conduction performance.
Two, the advantages of metal substrate: 1, thermal expansion, 2, heat dissipation 3, dimensional stability, 4, a wide range of applications
What samples should be provided for PCB circuit board proofing? The quotation information needs to be provided to the manufacturer, and the GEBER file is generally provided for the drawings. There are clear process requirements and quantity. The pcb manuf
At present, many circuit board surface treatment methods, the cost of electroplating nickel gold is relatively high compared with other surface treatment methods, in the case of gold prices are so high, has been less used, unless there are special uses.
The basic PCB design process is as follows: preliminary preparation →PCB structure design → mesh guide → rule setting →PCB layout → Wiring → routing optimization and silk screen → network and DRC inspection and structure inspection → output light drawing
In PCBA manufacturing, automatic optical detection is set at the last step of the SMT production line. After the SMT patch processing is completed, product defect detection is required. Through timely detection and reduction of defects, improve assembly e
Circuit diagram, also known as circuit schematic diagram, is a kind of drawings reflecting the electrical connection of each component of electronic equipment. The circuit diagram consists of some abstract symbols, according to certain rules.
The design of PCB starts from determining the size of the board. The size of PCB is limited by the size of the case shell, so that it can be placed into the shell exactly. Secondly, the connection mode of PCB and external components should be considered.
As an electronic engineer design circuit is a necessary hard work, if the PCB design is not reasonable performance will be greatly compromised.
SMT patch BOM list arrangement Note: 3. The description must be clear. 4. There are some crucial electronic components. Considering the fluctuations of the component market and the cost, 5. 6. Coordinate values required by coordinate T/B to distinguish po
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