PCB Manufacturing Issue/Confusion

Question

Hello all, I am having a 2 layer PCB manufactured by a fab shop. The PCB was designed in Eagle but I am having a problem I haven't encountered before. I sent in my GERBER files and they responded by saying there are no copper pads on the bottom layer, only on the top layer. It was my understanding all through holes are PTH (plated all the way through). I checked on older PCBs I have sent in and the through hole devices are the same. They're saying I need to make a separate set of through holes on the bottom layer that line up with the top layer. Previous boards I have made with this fab shop, using the same through hole device, were plated all the way through, I did not need to make a second set of aligned holes. I am at a loss of what is missing for them? is there a setting in Eagle that only allows plating through a certain thickness of PCB or something? I have searched around, made some adjustments, but I keep getting the same answer back from the shop. My silkscreen/soldermask bottom and top layers are not covering the pads top and bottom either as far as I can tell, can anyone see anything that sticks out at them? The GERBER files I sent in are attached and have all layers top and bottom. 
 Attachments: W188108ASH8_GERBER.zip

autodeskguest · Accepted Answer

Hello,

You may want to verify that all appropriate layers are in the cam job.

-D

On 9/28/2020 9:08 AM, Tristan Schoening wrote:

Hello all, I am having a 2 layer PCB manufactured by a fab shop. The PCB was designed in Eagle but I am having a problem I haven't encountered before.

I sent in my GERBER files and they responded by saying there are no copper pads on the bottom layer, only on the top layer. It was my understanding all through holes are PTH (plated all the way through). I checked on older PCBs I have sent in and the through hole devices are the same. They're saying I need to make a separate set of through holes on the bottom layer that line up with the top layer. Previous boards I have made with this fab shop, using the same through hole device, were plated all the way through, I did not need to make a second set of aligned holes. I am at a loss of what is missing for them? is there a setting in Eagle that only allows plating through a certain thickness of PCB or something?

I have searched around, made some adjustments, but I keep getting the same answer back from the shop. My silkscreen bottom and top layers are not covering the pads top and bottom, can anyone see anything that sticks out at them?

The GERBER files I sent in are attached and have all layers top and bottom.

--
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Attachments:
W188108ASH8_GERBER.zip

shabaz · Answer

Hi Tristan, I think they are not happy about this: There are four holes like this, which have very thin copper sliver around them. I think you used a via or pad to create these, when you probably wanted to use a drill hole only. Incidentally, there's another severe issue here: As you can see, there are two holes overlapping. That will cause them to send the design files back to you too. There are lots of places on that component which have these overlapping holes. To find these issues was easy, if you use Viewmate Deluxe. It costs $95, but it's worth it. It will automatically find these issues. It also noticed something weird about a couple of files: For some reason, the files marked with a red arrow have nothing in the 'Board Size' column. I don't know the reason. You might need to check the EAGLE CAM processor settings for those two output files. There also was no board outline file (not all manufacturers need that, but some do).

PCB Manufacturing Issue/Confusion

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