A BD-ROM production-capable Electron Beam Recorder (EBR) has been developed, resulting from an optimization program conducted on a prior prototype. The key technical improvements are a comprehensive upgrade of the mechanical master driving system to reduce the track pitch deviations and the implementation of a dynamic focus system, including an axial run-out checker to obtain a uniform jitter. And the multi-pulse write strategy was adopted to control the pit shapes. The resulting masters show a typical radial track pitch variation comprised in the range ±6.6nm across the entire recorded area. The corresponding push-pull signal deviation is found to be less than 18% on the whole disc and less than 14% in one revolution. The signal jitter of dual layered BD-ROM disc less than 6.1% on layer 0, and less than 6.7% on layer 1 with large enough push-pull amplitude through the whole radius. These results are fully compliant with the requirements for the dual layered BD-ROM disc of 50GB capacity.