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From:
"Decker, Scott UTAS" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Decker, Scott UTAS
Date:
Fri, 24 Feb 2017 17:07:09 +0000
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Steve,

   Wow, that's an interesting shaped board, made me want to go to the ice cream store for some reason... :-)  BTW, just wondering why you didn't flip 2 of them to nest them closer, maybe save a few bucks on materials? Anyway, in my opinion, I think you could do either and they should be ok. That said, by adding a tab between the boards would secure them from any twisting, but make them a bit less fun to de-panelize. You didn't mention the thickness of the boards either. If they are thin like .031 or so, the v-score might be too flimsy and you would want to use the mouse bite idea. Just my $.02 worth, your mileage may vary...



Scott Decker – Senior Analyst, Drafting & Design Services CID+ – Electronic Systems Center

UTC AEROSPACE SYSTEMS

3445 S. 5th Street, Suite 170, Phoenix, AZ 85040 U.S.A.

Tel: 602 308 5957  FAX: 602 243 2347

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-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory

Sent: Friday, February 24, 2017 9:46 AM

To: [log in to unmask]

Subject: [External] [TN] Panelizing Aluminum PCB's...



Good Morning all,



We're about to build a MCPCB (Metal Core) and I'm having a little issue about panelizing it. It's a little teardrop shaped board about 1.5" wide by 3.5" long. So I did a panel drawing for the board shop to panelize this for

me:



https://urldefense.proofpoint.com/v2/url?u=http-3A__stevezeva.homestead.com_Aluminum-5FCore-5FPCB.jpg&d=DQIBaQ&c=ilBQI1lupc9Y65XwNblLtw&r=Z5GKU9L_wgbp5uvPzUdN9HWtU4lRZiIaLoTaEwcy40w&m=Wfb6mijl3O8EUhyeID2JvbmWxP7tPeWdFkoqmKAuLO8&s=m6O2c0VruRSwHEwlH465CSnLDhljOb9Mrtko3ioSd8g&e= 



I have one board shop telling me that the v-score is the best way to go as far as being able to depanelize it after building it, and I have another board shop telling me that a tab routed mousebite is the way to go because a v-score will make the panel too flimsy. So what is your take on it? The board has doubl sided SMT



I've built metal core boards before at a past employer but they weren't panelized, so I'm not quite sure how stable it might be with a v-score, or how difficult it would be to singulate with a mousebite. Also we do almost all of our depaneling here manually, we don't have anything but a foot operated pneumatic tab nibbler.



Any input is appreciated,



Steve



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