bz wrote:

PlPaul wrote:

The safer practice nowadays is to use high resistance materials,
and NOT aluminum foil, or metal film covered plastics, or that black
conductive foam. The low resistance materials allow fast and high
charge/discharge currents that can vapourize small tracks or
microcircuitry.

Please show me where this is documented and what family of semi conductors
to which it applies.

It was well documented about 20-30 years ago. You're expected to KNOW this
stuff now.


My calculations show that the probability of
producing excessive current flow inside a CMOS chip by use of aluminum
foil, without already having exceeded the voltage limits of the chip, is
very
small.

And what calculations are those ?
Note : it has NOTHING to do with voltage.

Graham