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Listed below are full
length article abstracts discussing problem resolutions that
Foresite has participated in.
Tin Whiskering on PCBA
Capacitors in Storage
The tin whisker failures
investigated in this paper were found on functional RoHS-Compliant
hardware.
>>Read Full Article: Tin
Whiskering on PCBA Capacitors in Storage
Low Voltage, the
Incompetent Ignition Source
The present, widely-held
belief is that "low voltage" products, (typically powered by less
than 24V), are incapable of starting fires - that there is
insufficient energy to produce the required heat and ignition.
>>Read Full Article:
Low Voltage, the Incompetent Ignition Source
Fluoride Analysis by
Ion Chromatography
Now You See It, Now You
Don't - This article discusses ion chromatography (IC) analysis and
the importance of understanding the column's capabilities and
separation techniques to ensure accurate IC data.
>>Read Full Article: Fluoride Analysis by Ion Chromatography
Process Residues Cause
Field Performance Problems
This is a look into how
severe the consequences of ionic contamination can be to product
performance. A study was done to show how ion chromatography
results correlate to those of SIR, but ROSE testing shows no
correlation to neither ion chromatography or SIR testing.
>>Read Full Article: Process Residues Cause Field Performance
Problems
Residue Effects of
Weak Organic Acid (WOA) Flux Activators
Flux chemistries that are
not properly activated or cleaned are the most common sources of
detrimental ionic contamination. This white paper compares and
contrasts the various flux chemistry types available, and what their
potential effects are on long term reliability.
>>Read Full Article:
Residue Effects of Weak Organic Acid (WOA) Flux Activators
The Failure of a
Circuit
This article discusses
the various failure mechanisms that are cause regularly by harmful
ionic contaminants reacting with moisture and an applied voltage.
>>Read Full Article: The Failure of a Circuit
Does Conformal Coating
Stop Electrical Leakage Problems?
This analysis shows that
conformal coating is only effective if there are no ionic residues
entrapped underneath - though conformal coating may slow the
absorption of moisture, it does not over time prevent moisture
absorption and reaction with ionic contamination.
>>Read Full Article: Does Conformal Coating Stop Electrical
Leakage Problems?
Power Module Failures:
The Problem with Zinc Whiskers
An interesting study on
how zinc and tin whisker growth directly correlates with amounts of
ionic contamination.
>>Read Full Article:
Power Module Failures: The Problem with Zinc Whiskers
How Clean is Clean?
A study that examines how
Ion Chromatography with C3 localized extraction correlates well with
product performance while ROSE testing can overlook pockets of
contamination.
>>Read Full
Article: How Clean is Clean?
Process Control &
Qualification of Cleanliness Issues
A DOE study showing how
C3 testing and extraction techniques can incorporate into an
effective process qualification protocol
>>Read Full
Article: Process Control & Qualification of Cleanliness Issues
Terminal Block Manufacturing Residue Issues
Provides data and recommendations on boards with terminal block
manufacturing.
>>Read Full Article: Terminal Block Manufacturing Residue Issues
How Clean is This Spot?
Looks at how localized extraction techniques can be used in
conjunction with Ion Chromatography to look at specific area
cleanliness.
>>Read Full
Article: How Clean is This
Spot
PWB Contamination & Reliability DOE
This article was written by a customer of ours, Phoenix
International, and incorporates our data and findings to implement
cleanliness parameters in electronics manufacturing.
>>Read Full Article: PWB Contamination & Reliability
DOE
Can you Clean a No Clean?
This article looks at a specific case involving NTF returns with a
customer using a no-clean process, and looks at developing a
successful cleaning protocol for cleaning assemblies constructed
with a no-clean process.
>>Read Full
Article: Can you Clean a No Clean?
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