Comments on: Design for manufacture

By: JB

JB — Mon, 10 Nov 2008 15:38:32 +0000

The tutorial claim: “But a plane (sometimes called a polygon plane) increases the odds of the plane being mistakenly ‘poured’ onto a trace.”
That’s bullshit.
The picture show a PCB which have had dirt on the PCB or on the film when being manufactured. It has nothing to do with the polygob plane.

The limit’s they use are also totally out of date.
Any normal PCB manufacturer accept 0.5mm track/spacing (even for polys) and 0.2mm holes without a problem, these days. And that’s without additional costs.
If _your_ manufacturer cant, find another.
If your boards are produced by a ultra low-cost, low quality manufacturer like Olimex, you have only yourself to blame.

By: Daniel Velazquez

Daniel Velazquez — Sun, 09 Nov 2008 16:24:10 +0000

Of course they know what will happen in manufacture, they are from the future!!!

Check the DRC rules are dated Nov 11th, 08 and today is Nov 08th, 2008.

XP!!

By: David

David — Sun, 09 Nov 2008 05:23:17 +0000

I’ve found that when I produce boards I run them through a set of design rules I know my manufacturer will accept. I send them away and they check the design to ensure they can manufacturer it. If they find a problem with the board that I didn’t pick up they’ll pop me and email telling me what the problem is. Sometimes if it is just something small they’ll fix it for me and let me know what they’ve done.

By: reza naima

reza naima — Sun, 09 Nov 2008 02:07:40 +0000

I don’t know what board house they use, but in my experience, you take the specifications provided by the manufacturer, and set your DRC rules to be equal to their limits. If they mess up, then you can contact them to fix their problem.