Oblique-evaporated Tape for Digital Video Recording Use

Abstract

Oblique-evaporated tape has widely been used for Hi8 VTR and has recently attracted major interest as high density recording tape for digital home-use VTR. In order to obtain high output signal at high densities, the magnetic recording mechanism was investigated by computer simulation, considering the recording magnetization and the phase shift. According to the simulation, the magnetic properties to perform high output signal at high densities were derived. Considering this simulation, evaporated tapes were produced. Columnar growth direction, Co composition, oxygen flow rate, number of the layers and film thickness were optimized. Consequently, oblique-evaporated tape with high output signal at high densities was realized under this simulation results.