Kingford

  Abstract: ESD literally means electrostatic discharge. To put it simply, static electricity is a natural phenomenon, usually generated through contact, friction, induction between electrical appliances, etc. It is characterized by long-term accumulation, high voltage (can generate thousands of volts or even tens of thousands of volts of static electricity), and low electricity. , Small current and short action time. For electronic products, if the PCB ESD static electricity design is not well designed in the PCB layout design , it will cause unstable operation of electronic and electrical products. Table of Contents 1. Basic introduction to ESD 2. Basic physical properties of static electricity 3. PCB layout design considerations   1. Basic introduction to ESD There are two types of damage and damage caused by ESD (electrostatic discharge) to electronic products: sudden damage and potential damage. The so-called sudden damage refers to the severe damage of the dev...

  Table of Contents 1.PCB Signal layer 2. PCB Internal plane layer 3.Mechanical layers in PCB 4.PCB Solder mask layer 5.printed circuit board (PCB) Paste mask layer 6. Keep out layers in PCB 7. PCB Silkscreen layer 8. PCB Multilayer layer 9. Drill layer layers in PCB   1. PCB Signal layer The signal layer is mainly used to arrange the wires on the circuit board. Protel 99 SE provides 32 signal layers, including Top layer (top layer), Bottom layer (bottom layer) and 30 MidLayer (middle layer).   2. PCB Internal plane layer (internal power supply/grounding layer) Protel 99 SE provides 16 internal power supply/grounding layers. This type of layer is only used for multilayer boards and is mainly used to arrange power and grounding wires. We call it two Layer, four-layer, and six-layer, generally refer to the number of signal layers and internal power/ground layers.   3. Mechanical layers in PCB (mechanical layer) Protel 99 SE provides 16 mechanic...