คำตอบที่ 893
ด้านล่างของ transformer ครับ
ประวัติศาสตร์ ของ TDK มาจากชื่อเต็มว่า........Tokyo Denki Kagaku Kogyo K.K.
1935 Tokyo Denki Kagaku Kogyo K.K. established in Tamura-cho, Shiba-ku, Tokyo City for commercial production of ferrite cores.
1940 Hirasawa Plant constructed in Hirasawa-cho, Akita prefecture.
1951 Production of ceramic capacitors begins at the Hirasawa Plant.
1953 "Synchro Tape" - magnetic recording tape introduced.
1955 Ulcon Disc capacitor introduced.
1958 TDK's Paramister - parametron arithmetic circuit wins the Grand Prix at the Brussels World Exposition.
1959 TDK opens its first overseas office in Los Angeles.
TDK shares listed on the Tokyo over-the-counter market.
1960 Yawata Plant constructed in Ichikawa City, Chiba Prefecture.
1961 TDK shares listed on the First Section of the Tokyo Stock Exchange.
1965 TDK establishes a local subsidiary in New York.
1966 "Synchro Cassette Tapes" introduced.
1968 Joint venture company established in Taiwan.
1969 Chikumagawa Plant constructed in Saku City, Nagano Prefecture.
1970 Chokai Plant constructed in Nikaho-machi, Akita Prefecture.
Shizuoka Plant constructed in Sagara-cho, Shizuoka Prefecture.
1972 Winchester Heads developed.
Local subsidiary established in Dusseldorf, Germany.
1978 Headquarters moved to 1-13-1 Nihonbashi, Chuo-ku, Tokyo.
VHS format "Super Avilyn Video Cassettes" introduced.
Narita Plant constructed in Narita City, Chiba Prefecture.
1980 Video tape plant constructed in Georgia, United States.
Magnetic heads using amorphous materials introduced.
1982 Mikumagawa Plant constructed in Hita City, Oita Prefecture
TDK shares listed on the New York Stock Exchange.
1983 Company name changed to TDK Corporation.
TDK serves as an official sponsor of the First IAAF World Championships in Athletics (Helsinki).
1985 TDK has a pavilion at the Tsukuba World's Fair.
1989 Local subsidiaries established in Malaysia and Luxembourg.
1990
TDK Technical Center
1990 Technical Center completed in Ichikawa City.
1991 Local subsidiary established in Thailand.
1992 Plant constructed in Dalian, China.
Recordable CD-R compact discs with an organic colorant film introduced.
MD-XG mini disc for sound recording introduced.
1994
TDK Xiamen Co., Ltd (China)
1994 High-density recording MR heads introduced.
Local subsidiary established in Xiamen, China.
1995 Plant constructed in Hungary.
1996 Mikumagawa Plant acquires ISO 14001 certification.
Plant constructed in the Philippines for magnetic head production.
1997 TDK Malaysia becomes TDK's first overseas plant to acquire ISO 14001 certification.
1998 TDK Electronics Ireland Ltd. established as a mobile communications high-frequency component and module research and development base.
1999 Headway Technologies Inc., an American magnetic head maker, acquired.
2000 Multilayer chip capacitor manufacturing and sales company established in Suzhou, China.
TDK R&D Corporation established as a research and development base in the United States.
TDK Marketing Corporation established in Japan.
2005
DENSEI-LAMBDA Nagaoka Plant
2005
TDK History Museum
2001 System of outside directors and corporate officers introduced.
2002 The Mikumagawa Plant becomes the TDK Gorup's first operations base in Japan to achieve zero emissions.
2003 Innoveta Technologies, an American developer of power supplies for use in communications devices, acquired.
2004 TDK becomes the first recording media maker to join the Blu-ray Disc Founders.
2005 TDK acquires Amperex Technology Limited, a manufacturing and sales company of Polymer Lithium Battery in Hong Kong.
TDK acquires Invensys plc.'s power-supply business.
TDK opens the TDK History Museum in Akita Prefecture.
