3.fill 4 vias with conductive metal(silver) and plate top and bottom sides with electroless nickel/immersion gold (enig).4.solder resist mask:color-green taiyo psr4000 series-smobc both sides5.overall thickness includes laminate,copper and plating6.manufacture boards per IPC-A-600 CLASS 27.WARP&TWIST NOT TO EXCEED 0.0075IN/IN,MEASURED IN ARRAY8.NODULATION (BUMPS) IN THE PLATING IS UNACCEPTABLE ON ANY EXPOSED PAD SURFACE (INCLUDING EDGE PLATED AREAS).NODULATINS WHICH PROTRUDES THROUGH THE SOLDER MASK IS UNACCEPTABLE9.all dimensions are in inches.all tolerances non-accumulative10.pcb shall be shipped in unsnapped format11.vendor marking allowed in array waste area only12.during the life of the product,the supplier shall inform cts of any change that may affect the form,fit,function or reliability of the product13.all material used,must comply with the r june estrictions defined in the directive 2011//eu of the european parliament and the council of on the restriction of the use of certain hazardoussubstances in electrical and electronic equipment