Electrostatic discharge can have a bad effect on PCB board components and board. If insulators or open conductors have positive or negative charges and charge features based on insulator or conductor stored capacitance. Since is based on proximity that is verse charged and static created not shifted through EMF. As a customer of WIN SOURCE, you can rest assured that you are using their products that have been quality verified at all levels.
Causes of Static Electricity
Static electricity can be caused by any material some come with negative charges and others have positive charges.
Different materials such as styrofoam and plastic such as produce negative charges and human skin and animal fur cause positive ones.
The charged produced quantity is based on static material storage. As capacity of the human body is about 250 picofarad that is about a static storage charge of 25 kV of electromotive force.
Types of Electrostatic Discharge
ESD can be defined in different ways. The basic method to define is through devices that have a sensitive nature for human touch. The human body especially cloth has features to store 500 to 2500 volts of static electricity in each working day. It is low level for human perception but has enough intensity that can damage electronic components.
The human touch is not just a single technique that causes the current to affect the PCB board. The use of ungrounded components such as an oscilloscope for circuit troubleshooting.
The proximity of plastic and the production of air close to the assembly can generate a current that induces electrical damage.
How to prevent ESD from damaging components?
- use ESD mate on working space for conductive and grounded surface. The use of a mat dissipates static charges and avoids gathering.
- Use an ESD wrist strap connected to the mat. This strap makes sure to easily discharge of charge creation of the board.
- Do not use materials that produce static currents like plastic or synthetic fabrics close to the working area. Try to use anti-static clothing.
How to protect PCB from static electricity?
- The use of ground plate in board offers a larger grounded conductor that can get current included due to any ESD occurrences.
- If there is a separation of route from the ground and are longer they can cause inductance so use fewer length routes.
What is ESD in PCB?
- Electrostatic discharge (ESD) causes two particles with different changes to get close for the ionizing dielectric. In the case of consumer products ESD and dielectric breakdown in air is the result of field production between two points larger than 40 kV/cm.
How do protect PCB components?
- A simple casing of the PCB.
- Use Conformal coating.
- Potting or encapsulation.
- Low-pressure molding.
Can static electricity damage PCB?
- ESD is a small part of energy such as a small lightning bolt. This charge can result in damage to board units. larger amount of irreversible damage occurs when a larger ESD passes through the circuit
How do I reduce anti-static?
- Try to use a humidifier.
- Wear low-static shoes.
- use baking soda for laundry
- Use different products for clothing
- Tackle carpets and rugs.
- Rub upholstery with dryer sheets.
- Use metal objects.
How to protect PCB from overcurrent?
- The PCB fuse is the main component that offers overcurrent protection for the PCB board. PCB fuses minimize damage to electronic components from short circuits, inrush currents, and voltage transients.
What is ESD protection?
- Protection from ESD is the main component of EMC immunity demands. It is a feature of instruments to work in electromagnetic conditions through the limitation of receiving electromagnetic energy that can cause any damage.
How to solve an ESD issue?
- The basic and best method for reducing the effects of ESD on any device for stopping discharges from occurring is the use of plastic having high breakdown voltage and enough spacing between interconnection points and conducts can have insulation to avoid ESD events.
Which coating protects PCB from moisture?
- Conformal coating is the best method for PCB protection and film is applied on completely assembled PCB board. This layer works as protection to PCB from dust particles and other components. It also stops moisture that can cause corrosion.
What are the 4 ESD tools?
- Grounding cords.
- Antistatic tools.
- Antistatic gloves.
- ESD rubber matting
What are the techniques used to protect ESD?
- A – antistatic mat.
- B – ground cable.
- C – Grounding plug.
- D – ESD loop.
- E – ESD wristband.
What size wire is used for ESD grounding?
- The 18 gauge wire is used for grounding. The middle screw on an outlet is the best connection and the use of ring terminals is referred and it is a simple method.