Once supplied some "Nitto" tape to a wafer fab and they found a bunch of
bugs. All we could think to say was that they were very clean else they
wouldn't have got in....

Regards

Mike


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Edward Mines
Sent: Wednesday, November 17, 2004 5:05 PM
To: [log in to unmask]
Subject: Re: [TN] Strange Soldermask Defect.


As the senior chemist at HumiSeal I've heard a couple of unusual stories.

Ants in India supposedly like to eat silicone. Contacts in the big silicone
companies thought this was hilarious but one Monday morning I came into my
lab and found a herd of dead ants (the lab included a lot of silicone
chemicals in addition to silicone conformal coatings).

Parrots in Florida took a liking to a silicone coating used on electrical
transmission equipment. The coating manufacturer added capsicum (the
irritant in hot peppers) to the coating to eliminate the problem.

I know of operations where conformal coating is applied out doors in the US
& other countries. All kinds of airborne debris end up in the coatings.

Ed








Edward Mines BEChE, MEChE
238 Willard Dr.
Hewlett, NY  11557
516 205-6523

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