The process of PCB failure

These two times, the production documents were sent to the plate factory. Back to the board, a look at the PCB, was originally plug-in HDMI son, through hole unexpectedly did not drill, directly scrapped.

If there is a problem, the delay is one thing, but we have to find out who will carry the pot, right?

1. Check the design first: check the PCB package, the seat is really designed through hole, there is no problem, then import the production file into CAM350 to check, it can be seen that there are holes.

2. Call the board factory and ask why they make the board without holes. The reply is that they have made a mistake and then redo it for free. At this point, the pot was successfully thrown to the board factory. However, this kind of unperforated thing happened again, so that the subsequent plate has to remind the plate factory to check the through hole. In a very long period of time, I am confused about this problem, why will the board factory do wrong? And most of the time it’s ok, a few of the time it’s wrong, they’re supposed to be professional, it shouldn’t happen. Then I stumbled on the problem.

Production documentation issues

I used the PCB designed by Allegro software. When there are non-circular holes in the PCB board and Gerber is exported, the drilling files should be exported not only. DRL files but also. Rou files. The reason why THE PCB board is not drilled is because there is no. Rou file in my production file. But you can see the drill hole in Cam350, which made me mistakenly think it was ok. However, why did the plate factory say that it was their problem, but not the problem of the document? Maybe they are more responsible and brave to take responsibility. I have been using CAM350 to check Gerber files for a long time. The method of checking is to scan each layer to see if there are any errors. The main things I can check are whether there are missing files, whether there is update of copper skin, whether the silk screen number is forgotten, etc., which are very limited. I estimate that many people also use CAM350, here is a small tool recommended for you -DFM.

Gerber View tool -DFM

To call this a Gerber viewer is to belittle it, and it can do much more than that. I recommend this one because I think it has several very good features. 1. It can simulate the effect of real objects, as shown below

Is this very close to the real thing? Like some problem without drilling, you can see it at a glance.If there is no ROU file, the hole is blocked. 2, it can analyze PCB board defects: including open short circuit, minimum line width, line distance and so on, but also can accurately locate the specific position.

On the right is a summary of the results of its analysis, which you can click to see in detail to help determine if there really is a problem. 3, it can directly import PCB source files, also can import Gerber files for analysis, that is to say, do not have to import Gerber files for analysis every time. Can support import PCB source files, including Allegro, Pads, AD and other common software. 4, you can click to export Gerber files, coordinate files, also can export screen printing map PDF files and so on.