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Static may be a major
drawback, it's conjointly a phenomenon. In physics folks area unit
the most generators, however in process industries it's fast paced
materials etc. that area unit the most cause. the results on
electronic devices could also be invisible to the eye, however simply
because we have a tendency to cannot see the harm doesn't mean it
doesn't exist. Degradation caused by ESD to electronic elements might
not show currant take a look at. All IC's area unit sensitive to
static discharge, it's solely the brink at that harm happens that
varies.
Back in 1984 freelance
Yankee analysis calculable within the industry losses directly
attributed to ESD amounted to eighteen billion greenbacks. this might
are a conservative estimate because the figure was supported solely
forty % of the business sales and were projected on a survey of
around fifty electronic firms.
We cannot afford to
ignore the matter, forward a zero.5 % harm to IC's (remember that is
unseen harm which can be degradation or ruinous failure) with a mean
of twenty to thirty IC's per PCB this equals 10percent defective
PCB's, forward a mean of five PCB's per system that equals 40percent
defective systems. per annum alternative industries report loses of
scores of pounds owing to ESD inflicting plant and production losses.
ESD conjointly causes industrial instrumentality to fail; static
sparks cause fires, explosions and personnel injury. several
industries have suffered as well as NASA in 1964 once scientists lost
their lives. Health and safety executive's statistics show fifty
major incidents within the Britain every year.
So what causes static?
Static electricity is
generated by friction and separation of materials, that is termed
tribo electric generation. Electrons area unit transferred from one
material to the opposite, exploit each materials charged. Since
electrons have a charge, the fabric that acquires electrons is left
charged whereas the one that surrenders electrons becomes charged.
The trio electric series is usually employed in explaining
electricity.
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