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Applied Infrared Lamp Technology ...improving component quality and reliability while minimizing environmental impact.
METFAB's Reflow Systems use state-of-the-art short wave infrared lamp technology to produce improved component quality and reliability when incorporated into production lines to reflow plated tin and tin alloys. Simple temperature adjustment allows the accommodation of a wide range of part configurations and tin alloys. The result is a bright mirror like finish with excellent solderability characteristics and the lower likelihood of whisker development with age.
Dense and porosity free coatings
Slower intermetallic formation
Reduced surface oxidation
Extended shelf life
Prevents whisker formation
Improved insertion force
Excellent formability during stamping
High efficiency gold reflector lamps
Independent lamp intensity adjustments
Long lamp life
METFAB reflow systems are recommended for the post treatment of electroplated tin, solder and other tin alloys on strip and stamped components.
Each system is configured to match the range of line speeds and components likely to be encountered.
Modules can be provided as part of complete new systems or as retrofits to existing lines.
Single and multiple strand models are available.
Electroplated tin, solder and other tin alloys have been used for years as a final finish for electronic components that are soldered or inserted into the final locations. The quality of those finishes effects the life and performance the component and ultimately the device. Deposit porosity and solderability have always been key parameters in determining product quality and predicting the useful life.
It has been determined that reflowing or melting the electroplated finish after application significantly improves its functionality.
A very pure, dense, porosity-free structure is formed that exhibits slower copper-tin intermetallic compound growth and reduced surface oxidation. Both improve solderability.
Reflow also improves the uniformity of tin distribution in the deposit. This results in lower required insertion forces during assembly and excellent formability in post plate stamping operations.
Conventionally electroplated finishes exhibit "whisker" formation as the finish ages. Whiskers can cause electrical short circuits that may result in loss of product reliability and premature device failure.
Reflow of the deposits prior to assembly greatly retards or eliminates whisker formation.
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