PIN TRANSFER
OF ADHESIVE: When the adhesive is supplied as a bulk liquid a means to
apply a small dot is needed. The pin transfer method is simple and easy. Straighten
a paper clip or use a piece of rigid wire as the pin. Place a small puddle of adhesive on
a flat surface a dip the pin and then simply transfer the adhesive to the board surface.
In this case factors such as depth of supply puddle and viscosity of the adhesive, as well
as surface tension will determine the results. Practice is essential.
    
WHAT IF I DON'T HAVE SPECIAL ADHESIVE: A number of
users have achieved acceptable results with common two part epoxies found in hardware
stores, as well as
thick gel type cyanoacrylate adhesives. It is important to understand that
commercial products made for Surface Mount attachment are usually formulated to
provide for enhanced matching of temperature coefficients, thermal conductivity, contrast
enhancement, reworkability, Ect. As a practical matter, from a technical purists
perspective if would be best to have the special SMD adhesives, however, other adhesives
could be used on a limited basis for prototype work within the limitations that may exist.
Obviously a material must be selected that is non-conductive and will be of sufficient
strength to withstand the effects of careful soldering.
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