Technology decomposition theory and magnetic disk technology

Technical change in the magnetic disk technology is investigated in light of technology decomposition theory proposed previously by the author (see ibid., vol.36, no.1, p.37-46 (1989)). The trends that provide the technical and technological measures of cost performance are presented. The technology decomposition for magnetic disk technology is postulated and the constituent values computed. Technology decomposition theory and the findings from disk technology evolution are discussed. The constituent values for magnetic disk technology are the same as have been found previously. The transfer ratio for magnet disk technology is the same as the transfer ratio found previously for microelectronics technology. The characteristics of technical change, i.e. initial effect, manufacturing constituents and concavity, are also present in the technical change of magnetic disk technology