ESD Part-1 (Electrostatic Discharge), ESD Training in Details.

Electrostatic Discharge (ESD)
To start with, I will look at what electrostatic discharge or ESD is. Electrostatic discharge is simply a rush of static charge to another object. So, when an object with a lot of charge comes into contact with an object with no charge, the charge will attempt to equalize across the two objects.

To understand this better, consider that you have a human. Humans don’t store or create static electricity that well. This is because humans are mostly made of water and our bodies don’t generate a lot of electricity. We only need a small amount of electricity to move our muscles and make are hearts beat etc.
However, things like the clothes that we wear can create and store a lot of static electricity. Clothes made of synthetic materials are more prone to creating and storing static electricity. Material like cotton does not create or store as much static electricity as synthetic materials do.

Discharge
When your body builds up a static charge, the charge will follow the path of least resistance. The destination will be a body with unequal charge. So essentially the static electricity is attempting to balance the charge out with another body.

Static Electricity:- A static electric charge, typically produced by friction, which causes sparks, crackling or the attraction of dust or hair.
Electrostatic discharge (ESD) is the release of static electricity when two objects come into contact.
For examples, we fill shock when we walk across a carpet and touch a metal doorknob.

At what point do you hear static?
•5000+ Volts.
At what point do you feel a static shock?
•3000+ Volts.
At what point do you see static?
•10,000+ Volts.
What voltage can damage components?
•Can be as little as 10 volts depending on the size, sensitivity and type of component.

Damage Classification :- Electrostatic damage to electronic devices can occur at any point from manufacture to field service. Damage results from handing the devices in uncontrolled surroundings or when poor ESD control practices are used.

ESD damage is not always visible to the naked eye.
ESD damage to electronic components is two types: 1. Catastrophic / Direct failure
2. Latent Failure

Catastrophic / Direct failure :- Catastrophic failures will lead to completely failed or dead components. Catastrophic failures occur when a component is damaged to the point where it is DEAD NOW and will never again function. In these cases,

Latent failure :- Latent failure occur when ESD weakens or wounds the component to the point where it will still function properly during testing, but over time the wounded component may cause poor system performance

Why ESD Important :- Electrostatic Discharge (ESD) can damage sensitive electronic devices.

Higher manufacturing costs
Rework
Repair
Scrap

Lower Production yields.

Unhappy Customers.
Shorter Product Life
Reduce Product Reliability

PART 2 of ESD Video is coming Soon.
#ESD #keshri #tachnicalkeshri #krishnakeshri #esdtraining #pcb #pcbmanufacturing