Hitachi, Ltd.

Renesas Technology Corp.

Hitachi Ulsi Systems Co., Ltd.

Hitachi Software Engineering Company, Ltd.

Hitachi Computer Engineering Co., Ltd.

Hiroshi Satou

Toshinori Hirashima

Munehisa Kishimoto

Tokuhiro Niwa

Kenji Nishimura

Masashi Fukuda

Ihei Kajiya

Kenji Yoshida

Hiroi Oka

Tutomu Koita

Ryouichi Matusita

In a magnetic disk storage apparatus, when power supply is stopped, a magnetic head can be retracted safely and quickly so as not to be damaged. There are provided a back electromotive a force detector that detects back electromotive forces developed in coils of a voice coil motor for moving a magnetic head when power a supply is stopped, and a brake controller that judges a movement speed of the magnetic head from the detected back electromotive forces, and brakes the voice coil motor when the movement speed is greater than a preset first limited speed.

Magnetic disk storage apparatus and method for controlling magnetic disk storage apparatus

The present invention provides a semiconductor device which is stably operated even with respect to heat generated upon its operation and makes no use of an environmental harmful substance (lead). The semiconductor device includes a support plate for supporting a semiconductor chip and the semiconductor chip fixed onto the support plate with an adhesive interposed therebetween. The semiconductor chip is fixed to the support plate by a highly thermal conductive adhesive and a high junction strength adhesive provided so as to separate bonding areas from one another. The highly thermal conductive adhesive is provided in plural places within the whole fixing area. The highly thermal conductive adhesive is associated with a heated portion of the semiconductor chip. The high junction strength adhesive is provided so as to surround the highly thermal conductive adhesive. Both the adhesives do not contain lead corresponding to the environmental harmful substance.

Semiconductor device and a method of manufacturing the same

A Local Area Network (LAN) is disclosed in which each node includes means for receiving clock signal information from an external network, which may by way of example be another LAN or a wide area network (WAN), and for generating therefrom clock signals for each node of the local network to accommodate synchronous information exchanges with the external network. Any one of the nodes of the local LAN network may act as a Control Node, and any one of the remaining nodes upon instruction from the Control Node may act as a primary Transmission Node for generating clock signals based upon the external network clock signals for all of the nodes of the local LAN network.

Network synchronization control system and control method

Growing community of inventors

Takasaki, Japan

Hiroshi Satou