Ed, I had a board once from TurboMach in San Diego, CA. that had a metal
core for heat dissipation that flew on a spacecraft.... The base material
TCE (thermal coefficient of expansion) will play a part in your selection of
materials... In their case I believe they used Alumina... not Aluminum. I
believe it more closely matches the TCE of FR4 material than Aluminum.
Dissimilar materials will tear themselves apart with temp cycling. Also it's
not a process for the cost conscious designer.... Better talk to a fab house
before selecting this method as a solution. - Bill Brooks


-----Original Message-----
From: Ed Holton [mailto:[log in to unmask]]
Sent: Wednesday, June 07, 2000 9:59 AM
To: [log in to unmask]
Subject: [TN] aluminum bonded PCB


I am looking for information on a circuit board house that can supply a
multilayer PCB bonded to a thin aluminum sheet(heatsinking purposes).  If
you know of a supplier or if you are doing this process, please contact me,
I need to learn about this process and who can supply a board ready for
populating.

Thanks

Ed Holton
Manufacturing Engineer and Group Leader
Hella Electronics
Telephone (734) 414-0944
Fax (734) 414-0941

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