Mineo Moribe

Effect of underlayer on soft magnetic properties of electroless plated CoFeNi films

The soft magnetic properties of electroless plated CoFeNi films were examined in terms of the underlayers. CoFeNi films on NiP underlayers had a high saturation flux density of 1.7 T and a small coercivity of less than approximately 300 A/m when the film thickness was more than 300 nm. With a thickness of less than 300 nm, however, the saturation flux density was significantly reduced, while the coercivity drastically increased. These properties could be improved by utilizing a NiFe underlayer, instead of a NiP underlayer, to improve the film structure around the interface between the CoFeNi film and the underlayer.

A novel stereoscopic 3D photographic technology with a stereo adapter attached to a monocular camera

This paper proposes a novel stereoscopic 3D photographic technology with a stereo adapter attached to a monocular camera. From a cameras image, we select left and right ones with an adaptive threshold based on an amount of light entering the camera. Furthermore, we correct distortion of the left and right images by utilizing a new criterion derived from correctness of searching directions. Consequently, an automatic stereoscopic 3D photographing can be achieved.

Bit-Error Reduction In Magneto-Optical Disks

The number of bit errors in magneto-optical disks were reduced and a bit-error rate of 10-6 was achieved even after an accelerated lifetime test. To reduce the number of bit errors, we performed error detection and classification and found that the substrate was the dominant cause of errors. The substrate we used was a photopolymer(2P)-glass substrate, and we found two types of defect origin. One of them was due to 2P residues on the stamper, and the other was due to dust adhering to the substrate. We reduced the initial bit-error rate by removing these defects. We also found that 2P impurities considerably increase the bit-error rate during the accelerated lifetime test. By purifying the 2P, we made our disks more stable, and estimated that their lifetime would exceed 20 years at 40°C and 90% RH.