Sony Corporation

Satoshi Iwatsu

Noriyuki Honda

Kazunori Ozawa

Takashi Saito

Toshiaki Iwafuchi

Yasuhito Eguchi

Yoshio Nishi

Masana Ugaji

Hideya Takahashi

Yosuke Kita

Kiyoshi Katayama

Tatuo Shimizu

A semiconductor device able to maintain a bonding state between a bump and an electrode and having high reliability even under thermal stress, wherein a sealing resin is interposed to bond the electrodes and bumps between a wiring board formed with a plurality of electrodes and an IC chip formed with a plurality of bumps, the bumps being formed under the condition that the following formula is satisfied.100&#x3c;((&#x3a6;)/)&#x3c;125where &#x3a6;A represents the top diameter of a bump bonded with an electrode, H the height of a bump projecting from the IC chip and bonded with an electrode, and F the linear thermal expansion coefficient of the sealing resin.

Semiconductor device using bumps, method for fabricating same, and method for forming bumps

A semiconductor device comprising a semiconductor substrate on which metal bumps having narrowed base portions are bonded and coated on its top surface with a resin covering the base portions of the metal bumps, improving reliability of the bump bonds. Also, a method of production of a semiconductor device including steps of forming metal bumps in a wafer state, coating a resin for protecting a wiring surface of a semiconductor chip in the wafer state and cutting the semiconductor chip from the wafer, wherein the metal bumps have narrowed base portions and are bonded to the wiring surface of the semiconductor chip and the resin is coated covering the base portions of the metal bumps.

Semiconductor device and method of production of the same

A spirally coiled electrode assembly has positive and negative electrodes each including a web-like collector coated with an active material on opposite surfaces thereof, and separators disposed between the positive and negative electrodes. A plurality of rectangular leads extend from opposite sides of the web-like collectors in directions perpendicular to a direction in which the positive and negative electrodes and the separators are wound. Positive and negative terminals are connected to the rectangular leads extending from the respective opposite sides of the web-like collectors. The spirally coiled electrode assembly, the rectangular leads, and the positive and negative terminals are housed in a cylindrical casing whose opposite ends are closed by respective caps. The positive and negative terminals are fixed to the caps, respectively.

High capacity secondary battery of jelly roll type

A battery unit of a cartridge type for use as a power supply for electric motorcars, broadcasting apparatus and the like comprises a battery, a monitoring unit for monitoring the condition of the battery and storing information about the battery, a display for displaying data obtained by the monitoring unit, an I/O unit for sending out data representing the condition of the battery monitored by the monitoring unit to an external device, and a battery identification output unit for sending out a battery identification signal representing the type of the battery. The monitoring unit comprises a voltage measuring unit for measuring the supply voltage of the battery, a current measuring unit for measuring the current supplied from the battery, a temperature sensor for sensing the temperature of the battery, and a clock for indicating passage of time. The monitoring unit determines the quantity of residual electrical energy remaining in the battery when replacing the battery with a fully charged battery.

Battery unit and battery energy billing method

Growing community of inventors

Kanagawa, Japan

Satoshi Iwatsu