Emerson Bristol 2808 Series, Инструкция по эксплуатации

Страница: 130 / 140

2
ESDS Manual
#S14006
4/15/92
2. Materials
● ● ● ● ●
Inhibitor
(Texwipe Gold Mist ; Chemtronics Gold Guard, or equivalent)
● ● ● ● ●
Cleaner
(Chemtronics Electro-Wash; Freon TF, or equivalent)
● ● ● ● ●
Wiping cloth (Kimberly-Clark Kim Wipes, or equivalent)
ESD-SENSITIVE COMPONENT HANDLING PROCEDURE
1. Introduction
Microelectronic devices such as PC boards, chips and other components are electro-
static-sensitive. Electrostatic discharge (ESD) of as few as 110 volts can damage or
disrupt the functioning of such devices. Imagine the damage possible from the 35,000
volts (or more) that you can generate on a dry winter day by simply walking across a
carpet. In fact, you can generate as much as 6,000 volts just working at a bench.
There are two kinds of damage that can be caused by the static charge. The more
severe kind results in complete failure of the PC board or component. This kind of
damage is relatively simple, although often expensive, to remedy by replacing the
affected item(s). The second kind of damage results in a degradation or weakening
which does not result in an outright failure of the component. This kind of damage is
difficult to detect and often results in faulty performance, intermittent failures, and
service calls.
Minimize the risk of ESD-sensitive component damage by preventing static build-up and
by promptly removing any existing charge. Grounding is effective, if the carrier of the
static charge is conductive such as a human body. To protect components from
nonconductive carriers of static charges such as plastic boxes, place the component
in static-shielding bags.
This manual contains general rules to be followed while handling ESD-sensitive
components. Use of the anti-static field kit to properly ground the human body as well
as the work surface is also discussed.