25 Jul
2012
25 Jul
'12
12:36 a.m.
On 07/25/2012 01:55 AM, Chuck Guzis wrote:
Laser diodes are shipped with shorting bars across their leads. The
idea there is to to avoid any significant voltage differential between
the leads.
As the same issue is at hand with MOS components, I'd call bullshit on
the idea of "too conductive" being bad. I'd like to see some references
on that.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
Being *too*
conductive is not ESD safe. The idea is to let the charge
drain away slowly. If a charge drains too quickly, it can induce a
charge nearby that might not be protected, like something internal to
a component.
So that black (carbon-impregnated) foam used for ICs isn't ESD-safe
becasue the resistance is only a hundred ohms or so per square inch?
I remember when early MOSFETs were shipped with the leads connected
together by a small jumper. You installed the FET and then clipped
the jumper, Odd and disastrous things could happen if you forgot to
remove the jumper.