Final questions
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mchahn 2 years ago
I'm about to release. I have some final questions. 1) How close can I get to the edge of the board or to a hole? The DRC doesn't seem to check the board edges and the holes. My closest edge of trace to the center of the board boundary is 17 mils. Is this a problem? 2) I have a VQFP-64 package with 0.5 mm pitch between pins. The default setting of 8 mils for pad-to-pad and pad-to-trace fails in the DRC. I had to set them both to 6 mils to fix all the errors. Is 6 mils going to be OK? 3) I see one of the layers to choose from is the top solder layer. I don't need to use this, right? Will a solder mask be automatically generated from the pads? 4) This board is going to be an arduino shield. I put in a border with the matching shape that is not rectangular. Will I pay extra for the angled saw cuts? 5) Are there any extra tools I can run to do some final checking? This is my first board and I'm afraid of doing something stupid. Maybe someone could take a quick look at it for something obvious? The public URL is https://easyeda.com/editor#id=CA6nFXR9r|oEMGARLFl|JBN964E0A|y81VP7pHB.
Comments
mchahn 2016-04-29 13:12:59
Also a design question. Would it make sense to place a ground trace is in every area on every layer so all four layers can be copper filled? Is this common?
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dillon 2016-04-29 14:28:10
Hi, 1. 17 mils. Is this a problem? No problem. 2. Is 6 mils going to be OK? OK 3. Will a solder mask be automatically generated from the pads? Yes. 4. Will I pay extra for the angled saw cuts? No. >Would it make sense to place a ground trace is in every area on every layer so all four layers can be copper filled? Is this common? Yes. You can do this. This is very common. But you need to know why to put a copper area. We render your **public** PCB at here http://tinyurl.com/z9fedox this is an online gerber viewer. you can check every layer of your gerber.
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support 2016-04-29 14:33:10
BTW, Lots of SMT components on your PCB, you may need to order a stencil (If you know how to use it). EasyEDA has stencil if you need.
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mchahn 2016-04-29 14:37:58
I definitely want a stencil. How much do they cost? How many times can each one be used?
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mchahn 2016-04-29 14:39:49
Thanks for all the right answers. (grin) > But you need to know why to put a copper area. I've been designing electronics for 45 years so I know. (grin again).
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support 2016-04-29 15:01:28
When you place your order you can add a note "Need a **frameless** stencil ", we will bill you after we review, but you need to choose frameless or framed. If you solder by hands, not SMT machines, you should choose frameless, cheaper and low weight.
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dillon 2016-04-29 15:05:50
>I've been designing electronics for 45 years so I know. My God, It is cool that you can see a R0603 component in your age.
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mchahn 2016-04-29 23:49:20
I made a mistake in my measurement. The smallest distance between a trace and the edge of the board is 10 mil, not 17. Should I fix this? > It is cool that you can see a R0603 component I can't. My children will be doing the prototype assembly. (grin)
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support 2016-04-30 09:31:33
Hi, 10mil is good . 6mil is enough.
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