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Eagle clearance error

Former Member

Hi,

 

I am developing a product using nrf51822. While pcb designing I am getting a clearance error. Please let me know how to resolve it. All the dimensions are 8mil in clearance tab. Can i edit this to clear the drc error?

thanks in advance.

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  • Hi! Sorry in advance if I don't understand your question correctly.

     

    I am assuming here you are using the QFN package and the clearance error is between the pads of the QFN.

     

    You sure can edit the design rules to clear this error, but here is what editing the design rules mean. It means you have a fabrication house that will be able to handle a clearance of less than 8 mils. A quick check on the datasheet of your chip tells me you would need a minimum clearance of 5.9 mils. This is not an uncommon requirement. A PCB fabrication house I like to use is dirty PCBs. They actually give you design rules for their house for Eagle. And the clearance is 5 mils.

     

    Hope this helps you. Good luck with your design!

     

    Olivier

  • in reply to Former Member

    Hi Olivier,

    Thank you for the quick reply. I am new to hardware design. I am referring some online tutorial to do the design. I have seen your design rules. But am not sure how to use it in my design. Could you please explain ?

     

    thank and regards,

    rahul

     

     

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