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We identified
diode corrosion on the wire bond pads
which decreased the wave length intensity of the GaAs output. The optical
transistor working in conjunction with the diode acted intermittent. The concentration of bromine
was too high in the flux and migrated up the leads. This took about 3 months to
occur in the field. Instruments used
for the analysis were SEM-EDS, XRD,
TGA, radiography
and special diode
equipment.
We developed a technique for analyzing chloride
underneath the solder mask of PWBs. This saved a million dollar litigation suit
between two companies. This required the stripping of the solder mask without
removing or interfering with the amount of chlorides found on the board, then analyzing
and plotting the chloride distribution on the boards.
We saved one company a contract loss by identifying
several problems on one particular IC that caused their product to fail in the
field. The IC had a manufacturing defect that allowed read errors on the logic
device. Instruments
used for the analysis were SEM-EDS, probe
station, high magnification cameras, and curve
tracer.
We helped redesign a switch assembly (for cost
reduction) by using different materials for a Class III environment. Instruments
used for this analysis were thermal analysis, environmental testing, functional
testing, FTIR, and GCMS.
We identified a chemical process problem
where by an azeotrope used in the solvent cleaning gradually increased in
explosive mixture inside electrolytic capacitors which caused fires on PCBs (DASD controllers). This
problem kept the production line down for over two months. Instruments used for
the analysis were FTIR, XRD, Ion
Chromatograph, XRF, and extraction equipment.
We identified short duration electrical pulses that
put Motorola transistors on the threshold of failure by fusing several clusters of cells in
MOSFETs. Special equipment was used to determine dv/dt rates.
We identified package material concerns in 3rd rail
electronics for the transit authority. The potting material was stressing the plastic
encapsulation on the component which
caused the delamination of several components under 3rd rail conditions.
Instruments used for the analysis were CSAM, probe
station, SEM-EDS, thermal
analysis and FTIR.
We identified a shortage of an amine inhibitor
concentration used to minimize the migration and interaction of chlorine in
electrolytic capacitors. The vendor did not spike the batch process with
enough amine and thus scintillation of the capacitors occurred. This took about
2 years to manifest itself in the field. Instruments used IC,
XRD, and FTIR.
We identified a
"corona" problem with 400V polyethylene film capacitors when the two
contiguous plates were being polarized differently and causing the aluminum to
migrate to the terminals. Instruments used FTIR, GC,
SEM-EDS, electronic measuring equipment and cameras.
Time to failure was 1.5 to 2.5 years in the field.
We have identified
process problems with wrong materials, evaluated matrices of NO Clean fluxes using SIR testing, written process
specifications, documented line audits in various processes lines, component
manufacturing lines and
analyzed hundreds of PWBs for corrosion, electromigration, contamination,
and material compatibilities.
We have accessed different components for many companies. We offer
confidential, independent, unbiased, analysis in identifying defects related
to manufacturing, processing, design, chemical, and electrical over stress.
We have worked with power supply companies, PWB companies, companies who
need component analysis and redesign, and companies who need environmental
testing.
All of our achievements are to our customers advantage. They get a better
product, retain their reputation in the eyes of the customer for solving the
problem, and you get a service when and if you need it.
Whether you are an established company with many products or a new company start
up, technical leadership in developing the most advanced technologies is crucial
to the success of your company. This requires analysis of present
technologies, critical components, state of the art materials and development of
new ones.
Think about it
...................
As larger companies drive component manufacturers
to supply the
reliability data necessary to assess the component life and the manufacturers
are encouraged to take responsibility for their process actions, the need for
internal support goes down.
As redundancy, derating and lower power dominate the market, the need for
absolute assurance and testing goes down.
As the product cycle time from design to production is decreased, testing
is minimized.
As more companies sign up for standardized testing, the service and the
product become commodities driving down the price.
As companies sign up for warrantees from their suppliers, the inherent
risk goes down.
With all these factors driving the market place, it would seem hard to
believe that companies have lost sales or lost millions of dollars because
they did not plan for the unforeseeable: a failing component, a corroded
power plane on a PWB, a mismatch of materials, a contaminated process, a
design flaw, a passivation problem, mechanical stress on the silicon, low BVDSS
or excessive RDSon, thermal impedance (RĂ˜JC)
and so on, and so on.
These problems happen all the time. Failure analysis, components, PWBs,
and process and line audits, and power supplies are the main course of our
business. We believe we can help you out in such cases. We may even know
what the problem is before hand because we work with several hundred
suppliers and many many component manufacturers. We have solved problems where
others could not.
We are the
"
Problem Solvers of the Electronic
Industry
".
Gideon Analytical
Labs 80 Loughran Ln Highland NY 12528-2838
845-255-5356 info@gideonlabs.com |