| 1954 Toyo Electronics Industry established.
Carbon film resistors developed and marketed.
1958 Toyo Electronics Industry Corporation
1959 Tokyo office (presently Tokyo branch office) opened.
1962 In-house production of automatic resistor assembly machine inaugurated.
1963 Metal-firm resistors developed and marketed.
1965 Quality control program introduced.
Began development of semiconductors.
1966 In-house Standardization Committee organized.
ROHM WAKO CO., LTD. established.
1968 Completed production of diode arrays and diode matrices.
1969 Began R&D of bipolar ICs at the Head office in Kyoto.
ROHM APOLLO CO., LTD. established
1970 Computers for processing business data introduced.
ROHM LOGISTEC CO., LTD. established.
Established U.S. subsidiary company in California.
1971 Transistor developed and marketed.
Started research and development of integrated circuit (IC) in "Silicon Valley".
ROHM ELECTRICS GMBH established.
1972 ROHM KOREA CORPORATION established.
1973 LEDs and network resistors developed and marketed.
1974 Thermal printheads developed and marketed.
ROHM ELECTRICS (H.K.) CO., LTD. established.
1976 Square-plate chip resistors developed and marketed.
1977 Rectifying diodes developed and marketed.
1979 Corporate trademark is changed from R.ohm to ROHM.
ROHM ELECTRICS ASIA PTE. LTD. (RES DIVISION) established.
1980 Zener diodes developed and marketed.
1981 Registered company name is changed from Toyo Electronics Industry Corporation to ROHM CO., LTD.
Began development of MOS ICs.
ROHM FUKUOKA CO., LTD. established.
1982 Semiconductor Research Center is completed.
Digital transistors developed and marketed.
1983 Listed on the Second Section of the Osaka Stock Exchange and the Kyoto Stock Exchange.
Band switching diodes developed and marketed.
1984 First in the world to succeed in the practical industrial use of laser diodes with MBE methodology.
ROHM AMAGI CO., LTD. established.
1985 4-bit and 8-bit microcontrollers using original CPUs developed.
1986 Listed on the First Section of the Osaka Stock Exchange.
Research and Development Center opened (present Kyoto Technology Center)
Memory ICs developed and marketed.
Entered the capacitor industry.
ROHM FUJI CO., LTD. established (received capital participation from Japan subsidiary of AVX Inc.).
1987 Received PM award (TPM)
ROHM APOLLO ELECTRONICS (THAILAND) CO., LTD. established.
ROHM ELECTRONICS TAIWAN CO., LTD. established.
1988 Obtained basic patent of flash memory in the USA.
NARITA GIKEN CO., LTD. established.
ROHM MECHATECH CO., LTD. established.
1989 Listed on the First Section of the Tokyo Stock Exchange.
LSI Research Center opened.
Liquid crystal process technology established and products marketed.
ROHM ELECTRONICS PHILIPPINES, INC. established.
ROHM-WAKO ELECTRONICS (MALAYSIA) SDN.BHD. established.
ROHM ELECTRONICS (U.K.) LIMITED established.
1990 Began sales of LED message boards.
ROHM LSI SYSTEMS U.S.A., LLC established.
ROHM APOLLO DEVICE CO., LTD. established.
IDD CO., LTD. established.
1991 Second Research and Development Center opened.
1992 Completely abolished use of specific-fluorocarbons (all companies in ROHM Group)
MTP microcontroller with built-in flash memory developed.
1993 Developed large size LED public displays with a distinctive wide view angle.
ROHM ELECTRONICS DALIAN CO., LTD. established.
ROHM ELECTRONICS (TIANJIN) CO., LTD. established.
ROHM ELECTRONICS (MALAYSIA) SDN. BHD. established.
ROHM MECHATECH PHILIPPINES, INC. established.
1994 Obtained ISO9001 certification.
Developed a single-chip LSI for use in spread spectrum communications, the next generation of wireless transfer.
1995 Second LSI Research Center opened.
Jointly developed a 100,000 gate FPGA using flash technology with the Zycad Corporation of the United States.
Developed IC with a built-in modulation-demodulation circuit for IrDA infrared data communication.
1996 ROHM ELECTRONICS KOREA CORPORATION established.
ROHM ELECTRONICS (PHILIPPINES) SALES CORPORATION established.
ROHM WAKO DEVICE CO., LTD established.
1997 Yokohama Technology Center opened.
Started mass production red laser diodes for DVD.
ROHM DEVICE U.S.A., LLC established.
ROHM INTEGRATED SEMICONDUCTOR (THAILAND) CO., LTD. established.
ROHM ELECTRONICS (THAILAND) CO., LTD. established.
ROHM ELECTRONICS (FRANCE) S.A.S. established.
ROHM ELECTRONICS U.S.A., LLC established.
1998 Obtained ISO14001 Environmental Management System certification.
VLSI Research Center opened.
Developed highly reliable Schottky barrier diodes with both a low VF and a low IR.
1999 Kyoto Technology Center opened.
Kyoto Design Center opened.
Increased growth in development of the worlds finest quality ZnO single crystal film in cooperation with Electrotechnical Laboratory (ETL).
ROHM HAMAMATSU CO., LTD. established.
ROHM ELECTRONICS (SHANGHAI) CO., LTD. established.
2000 Developed new clock generator IC with the highest range of S/N and low jitter for DVD.
Developed REAL SOCKETTM a revolutionary concept in system LSI design technology.
ROHM LSI SYSTEMS (FRANCE) S.A.S. established.
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