Tab size? - Panelized PCB

[benjones]

Hey!

I have my PCB designed and prototyped and I'd like to put in an order with Seeed Fusion Premium but I wasn't sure what size my tabs should be. I'd like to do something similar to how this PCB is laid out, so I can just use a pair of side cutters to depanelize.



Here is a closeup screenshot of the tabs on my panel along with some info


24x30mm boards (100mm x 100mm panels)
0.8mm thick pcb (half standard)
4 corner tabs
2.4mm diameter routing bit
0.2mm grid in Eagle

The board doesn't contain any components and won't go through a pick and place machine, it's an adapter board.

Anyone know what size i should make my corner tabs?

Thanks!
-Ben

[Christopher]

5 mm is a good size

But like you say it's not going through a pick n place

http://blogs.mentor.com/tom-hausherr/blog/tag/mouse-bite/

[benjones]

yeah 5mm seems kind of overkill, at least for this.

I've never ordered a panel before and don't know how strong the tabs need to be. I don't want it to fall apart while they are handling, or milling it.

Have you ever done corner tabs like the panel Dave is holding?

[Psi]

Might pay to check if your chosen PCB-house can do routing through plated through holes before submitting it. Some of them bitch at that.

[benjones]

Thanks for the heads up Psi,

Seeed does do half hole process if you do their premium service, which I need anyway because they don't do routed panelized boards on the cheaper service.

http://www.seeedstudio.com/service/index.php?r=site/PremiumPcb

We offer PCB prototype with v-cut / Panelization / urgent need / half hole process etc.

Do you think 2mm on the corner would be better for tabs? I want something I can easily depanel with side cutters. I'm curious as to how big Dave's corner tabs are. They seem pretty small.

Thanks for the help,
-Ben