About Solder Mask and drill hole
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sourabh jawalkar 1 week ago
I just want to know that in between solder mask and the drill hole there is gray part is present what is that gray part indicates and what is the role in the PCB fabrication and layout? also please let us know which is the outer ring in violet color? At bottom layer.
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JLCPCBsupport 1 week ago
Hello ; The gray ring related to the "multi-layer" and here is the definition of its role : **Multi-Layer**: Similar to the RatlineLayer. For multi-layer hole(Plated hole) display. If the PAD setting layer property as mult-layer, it will connect with all copper layers. There is two different violet rings one is related to the top solder mask layer and the other related to the bottom solder mask layer. You can have the full definition of the available layers through the following link : [https://docs.easyeda.com/en/PCB/Layer-Manager/index.html](https://docs.easyeda.com/en/PCB/Layer-Manager/index.html)
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