Akio Kuroe

Optimum magnetic-head shape design for high-density recording

The optimum magnetic head shape suitable for high-density recording is determined by observing the head-to-tape contact for various head shapes and tapes by using transparent heads and an optical interference fringe method. The experiment proved that the use of heads with smaller r/R values and smaller head area at the trailing edge is highly effective for achieving contact and longer head life, where R is a radius of the head along its longitudinal direction and r is the radius along its transverse direction. >

Influence of the Metal Film of Micro-cantilever Fabricated by Photolithographical Technique on the Mechanical Resonant Frequency.

マイクロカンチレバー上に形成した金属膜の機械的共振周波数への影響に関して検討した.片持組合せ梁のモデルを用いて導出した式の計算値と試作した複合構造のマイクロカンチレバーの測定共振周波数がほぼ一致し, 最高1.07MHzの共振周波数を実現した.

An analysis of tape-to-head spacing by three-dimensional computer simulation

Experimental and theoretical studies of tape-to-head spacing loss in magnetic recording are reported. A computer simulation on a 3D model representing tape-to-head spacing clarified the relationship between tape surface roughness, tape-to-head spacing loss, and the output voltage level. The results showed that the spacing theoretically derived from the model can be separated into the corresponding spacing-loss and modulation noise near the carrier frequency by separating the spacing into AC and DC components. It is also found that the spacing produced in VHS-VCR is about 500 AA. It was also shown that an increase of 50 AA in spacing would produce a decrease of 1 dB in output level at a recording wavelength of 0.5 micron. >