We present a precision manufacturing technology that resembles the current 3-D printing technology but offers manufacturing precision and material choices unavailable in the existing 3-D printing technology. Specifically, the new manufacturing technology enables the direct-writing fabrication of electronics-quality solid metal 3-D micro/nano structures. The solid metal 3-D micro/nano structures can be of many types of metals; possess equal material properties of their bulk counter parts, can be made in many designed shapes such as freestanding extremely high aspect ratio electrodes, coils, tubes and high density arrays; can be produced with diameter ranging from 100 nm to many tens of micrometers and with aspect ratio exceeding one thousand. Most importantly, the intrinsic mechanism existed in this direct-writing process allows its scale-up for parallel process manufacturing. We will demonstrate this parallel process manufacturing with hundreds and even thousands array nozzles for simultaneous direct-writing of microscale, ultra-high aspect ratio metal structures.