On a Design of a System Forming the Central Hole
of Moulds for Polymer Substrates of Optical Disks
D. Trifonov, N. Tsonev, O. Tzarnoretchki
Institute of Information Technologies, 1113 Sofia
Abstract: The paper represents the design of a system forming the central hole of moulds for polymer substrates of optical disks. It is an expansion of the recently known constructions of mould blocks. The improvements suggested increase the reliability in obtaining a product with concentricity of the central hole and parallelity of the surfaces in conformance with the existing standard.