以下是引用sophiachen在2009-4-6 17:11:00的发言: MARK点不需開paste mask,您確認一下. Fiducial mark:光学点,Gerenally,finish size is about 1.0mm or 1.5mm and corresponding solder mask open window size is 3.5mm or 3.5mm,main function is use for a reference mark for SMT.Fiducial mark design in circuit layer and its common shape is round and suqare.BTY,LOGO is designed with silkscreen or solder mask ,only for sign the PCB factory UL and other symbol.All above information only for your reference,BTY,I am a technical support engineer. |