Hi manager, Nice day We are the leading prototype, Small Volume, Superior Difficulty, High Precision, High Quality PCB Manufacturer. Capability Layer Count1-40(≥30 Layers needs Review） Board thickness VS drill size12:1 Line width/spacing2.5/3mil Min hole size0.1mm(laser drilling） SurfaceHAL/Lesd Free ENIG Immersion Tin Immersion Silver OSP Please contact us for more details. Thanks and best regards, Anne TEL：0086-075523593797 Email: Anne@jsdpcb.com WEBSITE: http://www.jsdpcb.com