You should probably change the Category of this topic to JLCPCB because these are questions for the PCB manufacturer. 1. Do they support such narrow drill diameters? 2. Do they support filled holes or vias? If you want your PCBs manufactured by JLCPCB then see: [https://jlcpcb.com/capabilities/Capabilities](https://jlcpcb.com/capabilities/Capabilities)<br> <br> If you find a manufacturer who supports your requirements then you can adjust the Design Rules in EasyEDA to suit. Design Rules and more are described in the Tutorial (1) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)