use metal core pwb.
                                              jk

>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]]On Behalf Of Frank Kimmey
>Sent: Friday, July 05, 2002 12:05 PM
>To: [log in to unmask]
>Subject: [TN] PCB heat dissipation
>
>
>Steve, David, Earl, Werner, George, Brian (if you are watching), and any
>TechNetter who can help,
>
>I need to find out if there is a good way to dissipate a large amount of
>heat from the top of a PCB (DS and MLB) to the bottom.
>I would be interested in hearing pros and cons about filled and or plugged
>vias.
>Also any other more efficient fabrication methods.
>Please feel free to contact me on-line, off-line, by phone or any way you
>can.
>I need to find a viable solution to the removal of a lot of heat.
>I highly appreciate your help.
>Thanks in Advance
>FNK
>
>
>Frank N Kimmey, C.I.D.+
>Senior PCB Designer
>Powerwave Technologies
>PH. 916-941-3159
>Fax 916-941-3195
>
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