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Yoshiaki Hagiwara<br />

Sony Corporation<br />

41.1 Introduction<br />

© 2002 by CRC Press LLC<br />

41<br />

Microelectronics for<br />

Home Entertainment<br />

41.1 Introduction<br />

41.2 Basic Semiconductor Device Concepts<br />

Concept of Electron Fog • Bipolar Transistor Device<br />

Model • MOSFET Model • Buried Channel CCD<br />

Structure • HAD Sensor, a pnp-substructure<br />

41.3 LSI Chips for Home Entertainment<br />

Digital Still Camera • AIBO, a Home Entertainment<br />

Robot • Memory Stick • PlayStation 2<br />

41.4 Conclusion<br />

The history of home entertainment consumer electronics begins in May 7, 1946, with the founding of<br />

Tokyo Tsushin Kogyou (Tokyo Telecommunication Engineering ) by Masaru Ibuka (36) and Akio Morita<br />

(25) in Tokyo, Japan. Had these two bright young men not met and combined their considerable resolve<br />

and talents, the home electronics business would not have accelerated so much as we see it today, and<br />

our semiconductor business efforts would have been aimed only for military purposes for a while.<br />

In the Founding Prospectus, Ibuka eloquently stated his dreams for the company. Morita, together<br />

with the company’s first directors headed by Kazuo Iwama, led employees to realize these goals. Throughout<br />

their work, the young force was inspired by the free and dynamic atmosphere of the “ideal” factory<br />

they were striving to create. From the onset, Ibuka, Morita, and Iwama endeavoured to develop unique<br />

and exciting products that fulfil their customers’ dream.<br />

Iwama was 35 when he visited Western Electric to study transistors in January 1954. Iwama was the<br />

first engineer in Japan who understood the concept of “electron fog” in the bipolar transistor device<br />

physics.<br />

He worked as the leader of the bipolar transistor development project to realize the epoch-making<br />

portable bipolar transistor radio TR-55 introduced to the home entertainment electronics market in<br />

August 1955.<br />

Seven years had passed since the invention of the bipolar transistor in Bell Lab in December 1947.<br />

I was only seven years old and had no idea about how a transistor works at that time.<br />

I was a junior undergraduate at CalTech in Pasadena, California, in 1969 when I learned how the<br />

bipolar transistor and MOSFET work with the classical textbook by Grove. My class instructor was Prof.<br />

James McCaldin who was known as the co-inventor of basic planar passivation technology in modern<br />

MOS transistor fabrications.<br />

In the summer of 1971, I visited Sony Atsugi plant right after I received a B.S. from CalTech and<br />

worked as a reliability engineer in Bipolar IC production line for Sony’s Trinitron color TV sets.

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