If all of the pins are shorted together, there is no potential difference between the gate and source/drain voltage that could damage the gate oxide.So when the foil shorting all the leads together - a gate would not be punctured by esd if the foil is hit instead of just the gate pin?
It would depend on what potential the other terminals were at.So what if the drain tab were to be zapped would the foil prevent damage in that case too?
I store unused parts in the original antistatic material. I store parts that have been used for prototyping in black antistatic foam.Seems like completely wrapping the parts in foil is the safest and cheapest route rather than spraying the storage containers with antistatic spray.
Have you considered the case where a lead has pierced the foil and it isn't touching the foil? In that case, there can be a ESD event that can cause damage.But lets stick with ESD and FETs. A FET wrapped in foil IS protected. Not all leads need to contact the foil.
Yes, that is considered. Guess I wasn't clear enough on that part.Have you considered the case where a lead has pierced the foil and it isn't touching the foil? In that case, there can be a ESD event that can cause damage.
What are you concerned about? It's a potential difference that causes any damage. A static charge contacting the foil would put everything inside, and touching, it at the same potential; anything not touching it is safe too.
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by Robert Keim
by Robert Keim
by Luke James