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Development of
High-Performance MOSFETs with Dopant-Segregated Schottky Junctions
KINOSHITA Atsuhiro /UCHIDA Ken / KOGA Junji
The performance of metal-oxide-semiconductor field-effect transistors
(MOSFETs) with dopant-segregated Schottky (DSS) junctions was compared
to that of conventional MOSFETs. The DSS technique makes it possible
to form shallower junctions with much lower resistance than the
conventional source/drain structures. Additionally, it does not
degrade the channel mobility.
Toshiba has demonstrated complementary metal-oxide semiconductor
(CMOS) ring oscillation with sub-100 nm-channel DSS source/drain
MOSFETs for the first time in the world. A DSS n-type MOSFET with
a 50 nm channel length shows a drive current 25 % greater than that
of a conventional n-type MOSFET. The drive current of DSS transistors
corresponds to that of the next generation of conventional transistors.
Biaxial Superconductor
Films with Excellent Properties Derived from Highly Purified Coating
Solution
ARAKI Takeshi
The yttrium (Y)-based superconductor is one of the most attractive
oxide superconductors, because it has the largest critical current
density (Jc) among them at 77 K, 0 T. Recently, this superconductor
has been produced by non-vacuum chemical means. The predominant
process employed in this field is metal-organic deposition using
trifluoroacetates (TFA-MOD). However, purified coating solution,
which is indispensable for the preparation of high-Jc superconductors,
is difficult to obtain. Hydrogen bonds between the fluorine and
hydrogen atoms disturb the purifying process and increase impurities.
Toshiba proposed and indirectly confirmed an impurity-trapping scheme
and utilized it to effectively expel the impurities. Ultimately,
the amount of water, which is the most harmful impurity in TFA-MOD,
was reduced to one-twentieth, and the resultant coating solution
successfully yielded a superconductor with a Jc eight times that
of the conventional type. This promising result has stimulated studies
on the application of this process to microwave filters, wires,
and tapes.ß
Image Processing System
Compatible with MPEG-2 Specifications
AKINOSHITA Haruki / SUZUKI Yoshihiko
Toshiba has developed traffic surveillance systems that automatically
detect unusual occurrences by processing images obtained from surveillance
cameras installed in tunnels on expressways and other roads. With
the progress of communications technology, digital transmission
of camera images has become the standard and direct processing of
online images is required.
In response to these circumstances, we have now developed a traffic
surveillance system that complies with the MPEG-2 specifications,
as well as an image processing technology that can stably extract
the car region from only one image taken in an environment of continuously
changing illuminance.
Vodafone 904T Vodafone
904T W-CDMA Phone
SANADA Yoshihiro / NOMA Satoru / TANISADA Masahiro
The Vodafone Group has been developing third-generation (3G) cellular
phone convergence models that can be used in more than 100 countries
worldwide, while many vendors are also shifting their services to
3G cellular phones. It has been more than one year since 3G service
was launched, and users have been steadily changing to 3G cellular
phones.
Toshiba brought its first product in this line to market in June
2005, and has been releasing a succession of products since then.
We are now launching our long-awaited fourth product, the 904T model,
on the market, in preparation for the introduction of mobile number
portability (MNP) in Japan in 2006.
The Vodafone 904T wideband code division multiple access (W-CDMA)
phone is a high-tier cellular phone that supports dual-mode radio
technology, which expands the available area of coverage; video
telephone functions; and all of the latest Vodafone 3G services.
It also features Toshiba's original "Grip style" with
a seven-button layout under the LCD, which improves operability.
W41T CDMA2000 1xEV-DO
Cellular Phone for Japanese Market
NAKAMURA Masaru / YUKI Yoshinori / KOJIMA Kei
Japanese cellular phone service provider au launched the CDMA2000
1xEV-DO (code division multiple access 2000 1x evolution data only)
service in November 2003. This service provides a maximum forward
link communication speed of 2.4 Mbps, enabling higher quality music
or other large-volume contents to be downloaded. Consequently, the
cellular phones must have a large memory storage capacity.
To meet this requirement, Toshiba has developed the W41T model,
Japan's first music player cellular phone with a built-in hard disk
drive (HDD), with 4 GB of memory storage. The W41T also supports
mass-storage-class universal serial bus (USB), allowing users to
enjoy music, pictures, and movies or to carry large volumes of data.
Durability against vibration and impact in operation is improved
by the adoption of a buffer memory for playing music and the application
of shock-absorbing gel around the HDD.
High-Speed Board Simulation
Technologies for Notebook PCs
KAWAGUCHI Hitoshi / KONDO Yasumasa / KOGA Yuichi
We are entering the age of Giga Hertz PC when the transmission speed
of signal lines of notebook PCs exceeds 1 GHz. In addition, high-speed
signal lines make up an ever-growing share on the PCBs. The faster
transmission speed degrades quality of signal transmission and causes
noise current on the power plane as well as EMI noise, which cause
unexpected delay in development period.
Toshiba’s notebook PC development divisions are using CAE
tools such as simulators, design rule checkers, and so on at the
initial stage of hardware design, in order to deal with these problems
and shorten the development period of products. Recently, these
tools have also come to be used at the PC specifications or wiring
guidance study stages, significantly contributing, together with
wiring miniaturization to make PCs thinner and lighter, to the advancement
of Toshiba’s philosophy of “Thin & Light PCs.
Startup of High-Head
Pump-Turbine with World's Largest Capacity at Kannagawa Power Station
TODA Kazunori / KUROKAWA Toshifumi / KONNAI Tadashi
The first unit at the Kannagawa Pumped-Storage Power Station of
The Tokyo Electric Power Co., Inc. was recently commissioned. This
new facility is equipped with a high-head reversible pump-turbine
having the largest capacity in the world.
The equipment designed and manufactured by Toshiba for this power
station represents a number of impressive firsts. The reversible
pump-turbine has the world's largest unit capacity of 482 MW, and
the pumping head of 728 m ranks among the world's highest. A splitter
runner with five long blades and five short blades in circumferentially
alternate positions was adopted as an advanced technology, and has
contributed to a wider operating range and higher reliability of
the pump-turbine through its higher hydraulic performance and smaller
pressure fluctuation than conventional runners. An advanced control
governor based on the latest numerical technology was also adopted,
contributing to a reduction in construction costs through its function
of suppressing water surges in the waterway during automatic power
and frequency control (APFC) operation.
Paper Transport Technology
for OCR Scanners
KASHIMA Hideyuki / NAGAI Tomio
Toshiba Solutions Corp. has been developing and manufacturing scanners
for optical character readers (OCRs) that read and recognize the
contents of paper documents. In this device, a variety of information
such as images, colors, characters, and meanings is acquired as
electronic data from paper that is transported by paper transport
technology. Accompanying the advances in character recognition and
image processing technologies, the types of vouchers and other forms
that OCR scanners can handle are increasing. At the same time, paper
transport technology capable of handling paper of different thicknesses,
sizes, and qualities has also been evolving. |
