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Also problems with ammonia bases etch chemistries - they react with the
AL and leave a grey/blackish discoloration. This was using Berquist
materials.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice: 802.257.4571.21 Fax: 802.257.0011
http://www.vtcircuits.com
-----Original Message-----
From: Pete menuez [mailto:[log in to unmask]]
Sent: Thursday, January 13, 2005 4:50 PM
To: [log in to unmask]
Subject: Re: [TN] Aluminum substrates... any issues?
It looks like this application is single sided only. (No PTH) Aluminum
reacts (negatively) with electroless copper so you won't run this down a
standard line. There may be a possibility that direct metalization
would
work...
pete
>From: "Brooks,Bill" <[log in to unmask]>
>Reply-To: TechNet E-Mail Forum <[log in to unmask]>,
>"Brooks,Bill" <[log in to unmask]>
>To: [log in to unmask]
>Subject: [TN] Aluminum substrates... any issues?
>Date: Thu, 13 Jan 2005 11:07:30 -0800
>
>I ran across this supplier of aluminum boards and was interested if any
of
>you have dealt with this type of thing before? I have seen metal core
>boards
>made with alumina and bonded with the fiberglass/epoxy for heat sinking
>needs but this looks like a different process. Possibly less
expensive...
>???
>
>http://www.irctt.com/pdf_files/thickfilm_aluminum.pdf
>
>Any comments on it are appreciated.
>
>Best regards,
>
>Bill Brooks - KG6VVP
>PCB Design Engineer , C.I.D.+, C.I.I.
>Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
>e-mail:[log in to unmask]
>http://www.dtwc.com
>http://pcbwizards.com
>
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