regarding output files

I have created a layout for my pcb and now i want to check that whether that layout is correct or not can someone told me that how to check the layout. Thanx in advance

This depends on what program you used and how you created it. The normal rule is you draw the schematic and then transfer it to the PCB part of that programming then lay it out and run the DRC rule checker because if your schematic is 100% correct your PCB will be, but if you have just laid it out in PCB programming then there is no way to check if its correct and it would be make build then test or
other than if you copied the PCB it relies on you to trace the tracks on original PCB which can be time consuming and still may have errors at the end. This is why it's best practice to draw the schematic first and its the way I have always done it been there done that just copied PCB and checked thought it was good then make then spend hours trying to understand why it did not work and also it depends how complex and big the PCB is

wizpic said:

This depends on what program you used and how you created it. The normal rule is you draw the schematic and then transfer it to the PCB part of that programming then lay it out and run the DRC rule checker because if your schematic is 100% correct your PCB will be, but if you have just laid it out in PCB programming then there is no way to check if its correct and it would be make build then test or
other than if you copied the PCB it relies on you to trace the tracks on original PCB which can be time consuming and still may have errors at the end. This is why it's best practice to draw the schematic first and its the way I have always done it been there done that just copied PCB and checked thought it was good then make then spend hours trying to understand why it did not work and also it depends how complex and big the PCB is

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I have created layout directly without using the schematic the thing i want to know that how to take print out of different layer presented in my board so that i can check the layout manually. request you to guide something about this. Thanx in advance

Well what software package have you used isis or altium designer eagle ?????

Check connectivity:
1) Print schematic.
2) print each layer of PCB
3) obtain lightbox that paper fits on (can be done without - but this is better) - unless you can print it out in colour - different colour per copper layer.
4) Get box of highlighters.
5) Start following schematic and checking the components have been placed on pcb, tracks are connecting them right.
Highlight done connections on schematic & pcb.
Use yellow for OK, Red for wrong.

When finished - fix the red ones and recheck those areas.

Had you used the schematic to make the PCB, using the software and a rats nest then you could use the software to double check the connections.

Check against design rules:
Setup design rules in the pcb for track to track, track to pad etc.
Run a DRC/design rule check in the pcb program.

Review each error found and fix them.

Check silkscreen:
Your PCB package may not include silkscreen over pads checking so turn on only the following:
top electrical layer - pads (component and testpoint), silkscreen layer, names/outlines/text etc.

Review every square cm of the PCB checking and moving silkscreen items so that they do not cover the pads.

Perhaps let people know what software you used and we can advise you further.