Dynamic performance of parallel link suspension with seek motion during contact-sliding
Seek behavior and orientation of a contact-sliding head were investigated for two types of suspension with a ball slider. In a fundamental measurement, a seek behavior of the ball slider with a parallel link suspension was independent of kinetic friction in the sliding direction. A torsional displacement of the ball slider was inverse proportional to a ratio of torsional rigidity between a single beam and a parallel link suspension. In a dynamic measurement on a rotary disk, the ball slider with the single beam bounced intensely and showed large torsional displacement. While the parallel link suspension showed negligible torsion and kept stable orientation during seek motion.
A NEW SUPPORTING MECHANISM FOR NON-FLYING SINGLE-POLE HEAD
---We have studied two types of head supporting mechanisms for a non-flying single-pole-type head (SPT head). One is a self-weight type, in which the smooth up-and-down motion of a head is achieved using a micro linear bearing. The other is a balanced type that achieves the access to both sides of the disks and make the disk access stable under acceleration over 1 G. Both new supporting mechanisms show a good off-track and a track access characteristics. After the seeking of 7 mm distance on a disk, a reproduced voltage fluctuation with the new type mechanism is less than 2 % that corresponds to the off-track distance of 2 /!ID, whereas, that with the conventional type mechanism is 5 %- 10 % that corresponds to the off-track over 10 /!ID. A head installed in this head supporting mechanisms follows the disk up to 3600 r.p.m.. This result agrees well with the calculated results of the head motion using the equation of motion.
Structure and orientation control of organopolysilanes and their application to electronic devices
Abstract Molecular structure and packing of various organopolysilanes having symmetrical side-chains of alkyl substituents, such as poly(di-methyl silane), poly(di-ethyl silane), poly(di-propyl silane), poly(di-butyl silane), poly(di-pentyl silane), and poly(di-hexyl silane), are examined, and the method of orientation control of the polysilane thin film is proposed. The application of the evaporated film to the electro-luminescent device is also demonstrated.