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hermetic seal Designer III Blog; June, 2007 Archive; Designer III Blog Top Searches: • sound carts • discount av carts • prc100 oklahoma sound • free sound carts • sound carts • used av cart • tv stands sales in oklahoma • mahogony portable av carts • oklahoma sound presentation stand prc200 &ganizers-and-stands.html | By Bob Paddock at 06/23/07 09:28
A very common misconception is that Conformal Coating is a Hermetic Seal. It is used a lot in the Coal Mines, and the Electronic Industry in general, to keep the caustic dust off circuit boards.As Conformal Coating is not a hermetic seal, what real happens is the impurities in the water are kept away from the circuit, but the water itself reaches the traces. Since the water is now fairly devoid of contaminates the water acts more like a dielectric insulator. You never notice it in a low impedance digital circuit, but unless debugging is an obsession don't let it get near a RF tuning circuit or a high impedance Wireless Sensor Network circuit.
Tags: conformal coating • hermetic seal • coal mine • wireless sensors networks wsn •
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