Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Scoring

Rex Gustafson

#18314

Scoring | 30 November, 2001

Where can I find pcb scoring guidelines for boards with different thicknesses, panel arrays, ....?

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#18319

Scoring | 1 December, 2001

Ah, there�s the rub. So often we see scoring requirements defined based on depth of cut. This ignores that the depth changes with a variety of factors, including: * Wear on the cutting blade. * Variation in thickness of the fabricated board.

So, controlling the web is really the issue. Web thickness should not vary with board thickness. Look at IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards, page 14 for specific recommendations. You can purchase it from IPC [www.ipc.org].

There are rcommendations of this and measuring the web in the fine SMTnet Archives.

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