General Basics - How To Handle Components; Esd Precautions - Fronius Transpocket 1500 Erdstrom Serviceanleitung, Ersatzteilliste

General basics - how to handle components

ESD precautions

General remarks
Development work on new products always aims to achieve improvements in particular
product properties (e.g. optimised welding properties), as well as general improvements
in terms of higher performance, longer maintenance intervals, unlimited reliability, and
reduced weight and energy consumption.
The result of these efforts is increased use of microelectronic components, even in
product areas that have previously used only analogue assemblies.
In order to carry through these quality gains into the field of maintenance and customer
service, it is vitally important to ensure that electrostatic-sensitive devices (ESDS) are
also handled in conformity with the relevant guidelines during repair and maintenance
work as well.
Throughout the entire sequence of all service activities, from inward delivery of the
components to be replaced, all the way through to outward delivery of the repaired
machines, consistent protection of the microelectronic components is absolutely
essential.
Definition of terms
ESD is the abbreviation of electro-static discharge.
By electrostatic discharge we mean an equalisation of electrostatic charges when two
objects with different potentials approach one another. The charge-equalisation (e.g.
between the work-surface and the pin of a component) leads to uncontrolled currents
that can damage the component.
ESDS are components that can be damaged by electrostatic discharge or electrostatic
fields.
EPA (electrostatic protection area) is the abbreviation given to an ESD protection zone.
This is an area in which electrostatic-sensitive devices (ESDS) can be handled with a
minimal risk of being damaged by electrostatic discharge or fields, and without exposing
staff to any additional risk.
Earthing is provided by a bus installation which restores all connected-up parts of the
ESD protection facility (EPA) to a uniform potential.This will normally be the earthing
potential. The earthing facility ensures that objects which may come anywhere near the
components all have exactly the same potential.
Hazards
International studies show that approx. 25 % of all semiconductor failures are due to the
effects of electrostatic charge. Semiconductor failures may also occur as a delayed
consequence of damage to a component. When this happens, it is usually impossible to
trace what actually caused the component to fail.
Ensure that the following ESD precautions are observed:
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Only work with electrostatic-sensitive devices (ESDS) inside an ESD protection
zone (EPA)
Ensure that the ESD precautions are effective at all times
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