Jean-Francois
As St. Doug will likely say, "depends". Depends on how much ionic contamination, what voltage potential is present, and what you are doing with the board. It's my understanding that a coating may slow dendrite growth, all other factors being equil, but the only way to prevent dendrites is to avoid at least one of the holy trinity of dendrite growth (contamination, voltage, moisture).
The best protection - a clean board. If the end use environment is what is contaminating the boards, then yes - a coating would be a good protection. But as a bandaid solution, not good.
regards
Graham Collins
Process Engineer,
Northrop Grumman
Atlantic Facility of Litton Systems Canada
(902) 873-2000 ext 6215
>>> [log in to unmask] 03/21/02 11:19AM >>>
Is conformal coating a good protection against dendrites? I read that
ionic contamination can cause dendrites, if a board has ionic contamination,
will conformal coating prevent dendrites?
Jean-François Bissonnette
Vérificateur, Contrôle de la Qualité
Électronique
Produits et Procédés
Vapor Rail Inc.
10655 Henri-Bourassa O.
St-Laurent, Qc
H4S 1A1
(514) 335-4200 x2021
(514) 335-4231 fax
<<Bissonnette, Jean-Francois.vcf>>
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