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Ask the Experts Member

Mahendra Gandhi

SME - PWB Technologies

Northrop Grumman

Mahendra Gandhi has been working in interconnect industry since 1972.

Mahendra Gandhi has submitted responses to the following questions.

Exposed Copper Risk
Yes!

How to Eliminate Via Pits
Solder paste are not designed/developed as a via fill materials and should not be used as a via fill.

Flux Oozing from Insulated Wires
Capillary action during first tinning.

Conformal Coating in Low Humidity Environments
Not if it is fully cured.

Gold Plated Hole Defects
Have the board fabricated with solder coating in the holes... and avoid removing gold from the holes.

HASL vs. Immersion Gold
Do you recommend use of HASL vs. immersion gold for our application? Yes. Would you recommend another type of finish? ...

Improve DPPM for Wave Soldering Using Nitrogen
Itwill improve but not eliminate.

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EZ-FLO High Precision Dispense Tips
Each needle is machined from solid stainless steel as opposed to rolled tubing. The resulting smoother internal profile enhances material flow and consistency. Learn more.
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Introducing New Board-to-Board Connectors