Abstract: A technique for fabricating precisely machined micro devices and micro systems that facilitates the fabrication of three-dimensional device features and reduces the need for final micro assembly. The technique includes providing a layer of base material on which the micro device/system is to be formed. The base layer optionally undergoes mechanical micro machining such as ultra-precision milling, drilling, turning, or grinding, and/or non-mechanical micro machining including lithography and etching. Next, at least one layer of structural material is deposited on the micro-machined sacrificial layer. The structural layer then optionally undergoes mechanical and/or non-mechanical micro machining. Next, any excess material of the structural layer is removed. Finally, the material of the sacrificial layer is removed to at least partially free the final micro device/system from the base layer.

Abstract: A rotary tool for imparting rotation to a drill or an attachment element (2), and including a rotation-imparting element (14), and apparatus (6) for storing a cooling medium, and a conduit (7) for delivering the cooling medium to an operational side end region of the drill or of the attachment element (2).