Hetal,

Interesting questions!

You need to know how massive a deposit of your adhesive they plan to use.
You are using the calcined alumina as a CTE modifier to bring down the CTE
of the combined resins.  If they use it in thin sections, there should be
less stress on the components and overall system.  If they use it to pot a
massive block of material stress will increase.

Sorry, have little RF experience.  Does one consider the dielectric constant
of the material for RF attenuation situations?

If you do not get many responses on TechNet, you may consider going to
LinkedIn and joining the RFID group and post a question there


Steve Creswick
http://www.linkedin.com/in/stevencreswick






-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hetal Shah
Sent: Thursday, August 12, 2010 1:08 PM
To: [log in to unmask]
Subject: [TN] Is Calcined alumina in Epoxy resist tramission signal..?

Our customer  have an RF Transmitter on the PCB. they have a couple of
concerns.
 One that the potting material will damage the components and the other that
the potting material will shield the RF Transmissions of their transmitter.

Their assembly house was going to use our 2 parts Epoxy (which conatains
Calcined alumina) as the potting material.  Will this create any of the
problems mentioned?


Any insight into this matter would greatly be appreciated.



Thank you

Hetal Shah

R & D Chemist

MG Chemicals


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