1954

Toyo Electronics Industry established.
Carbon film resistors developed and marketed.

1958

Toyo Electronics Industry Corporation.

1962

In-house production of automatic resistor assembly machine inaugurated.

1963

Metal-firm resistors developed and marketed.

1965

Quality control program introduced.
Published "Visible Music History" (record of all volumes)

1966

In-house Standardization Committee organized.
ROHM WAKO CO., LTD. established.

1967

Transistors and switching diode developed and marketed.

1968

Completed production of diode arrays and diode matrices.

1969

Began development of ICs.
ROHM APOLLO CO., LTD. established.

1967

Transistors and switching diode developed and marketed.

1968

Completed production of diode arrays and diode matrices.

1969

Began development of ICs.
ROHM APOLLO CO., LTD. established.

1970

Computers for processing business data introduced.
ROHM LOGISTEC CO., LTD. established.
Established U.S. subsidiary company in California .
Published "History of Musical Instruments" (record of all volumes)

1971

Started research and development of integrated circuits (ICs) in Silicon Valley .
ROHM ELECTRICS GMBH established.
Transistor developed and marketed.

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-plante 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.
Began "ROHM's Diary of Kyoto Natural History" for company public relations as a newspaper column.

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.
Published "Asian Music" (recorded tapes of all volumes)

1982

Semiconductor Research Center is completed.
Digital transistors developed and marketed.

1983

Listed on the Second Section of the Osaka Security 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 (presently LSI Development Center ).
Memory ICs developed and marketed.
Capacitors marketed.
Published public relations magazine "ROHM's Diary of Kyoto Natural History."

1987

A manufacturing plant is established in Thailand (presently RIST).
ROHM ELECTRONICS TAIWAN CO., LTD. established.

1988

Obtained basic patent of flash memory in the USA .
ROHM MECHATECH CO., LTD. established.
NARITA GIKEN CO., LTD. established.

1989

Listed on the First Section of the Tokyo Stock Exchange.
Received PM award (TPM)
LSI Research Center opened.
Liquid crystal process technology established and products marketed.
A manufacturing plant is established in Philippines (presently REPI).
ROHM-WAKO ELECTRONICS ( MALAYSIA ) SDN.BHD. established.
ROHM ELECTRONICS (U.K.) LIMITED established.
Hosted "ROHM's Music Festival with Play Bach."
Published public relations magazine "ROHM's Diary of Kyoto Natural History II."

1990

America Technology Center opened.
Began sales of LED message boards.
ROHM APOLLO DEVICE CO., LTD. established.

1991

Second Research and Development Center opened.
Established ROHM Music Foundation.
Hosted "Young Artist Concert."

1992

Completely abolished use of specific-fluorocarbons (all companies in ROHM Group)
MTP microcontroller with built-in flash memory developed.
Hosted "Contemporary & Classics"

1993

Developed large size LCD public displays with a distinctive wide view angle.
ROHM ELECTRONICS DALIAN CO., LTD. established.
A manufacturing plant is established in Tianjin , China (presently RSC).
ROHM ELECTRONICS ( MALAYSIA ) SDN. BHD. established.
ROHM MECHATECH PHILIPPINES, INC. established.
Hosted "Kyoto International Music Students Festival" (held annually).
Hosted "Keith Jarret plays Mozart."

1994

Obtained ISO9001 certification.
Developed a single-chip LSI for use in spread spectrum communications, the next generation of wireless transfer.
Co-sponsored "The New York Trio."
Began "ROHM's Diary of Science of the tales of old Japan " for company P.R as a newspaper column.

1995

Second LSI Research Center opened.
Jointly developed a 100,000 gate FPGA using flash technology together with the Zycad Corporation of the United States .
Developed IC with a built-in modulation-demodulation circuitry for IrDA infrared data communication.
Hosted "ROHM Lyric Selection Mari Kumamoto concert" (held annually).
Co-sponsored "National Paris Orchestra."
Published "ROHM's Diary of Kyoto Natural History (Sound Report Edition)" CD-ROM.

1996

ROHM WAKO DEVICE CO., LTD established
ROHM ELECTRONICS KOREA CORPORATION established.
ROHM ELECTRONICS (PHILIPPINES) SALES CORPORATION established.
Co-sponsored "Scala Philharmonic Orchestra."

1997

Yokohama Technology Center opened.
Started mass production of red laser diodes for DVDs.
ROHM ELECTRONICS (THAILAND) CO., LTD. established.
ROHM ELECTRONICS (FRANCE) S.A.S. established.
Co-sponsored "Biwako Mainichi Marathon."
Co-sponsored " Moscow Broadcast Symphony Orchestra."
Co-sponsored " Prague Symphony Orchestra."
Published "ROHM's Diary of Kyoto Natural History (Light Report Edition)" CD-ROM.

1998

Obtained ISO14001 Environmental Management System Certification.
VLSI Research Center opened.
Developed ROHM's unique Dual-Cell system EEPROM.
Developed highly reliable Schottky barrier diodes with both a low V F and a low I R .
Co-sponsored "Inter Prefectural Men? Ekiden."
Co-sponsored "Super Trio: Ashkenazy, Zukerman, Harell."
Co-sponsored "New Japan Philharmonic Special" concert, conducted by Seiji Ozawa.
Began "ROHM's Diary of Science of the tales" for company P.R as a newspaper column.

1999

Kyoto Technology Center opened.
LSI Development Center opened.
HONG KONG TECHNOLOGY CENTER opened.
Developed an IC for mobile phones.
Increased growth in development of the world's finest quality ZnO single crystal film in cooperation with Electrotechnical Laboratory (ETL).
ROHM HAMAMATSU CO., LTD. established.
ROHM ELECTRONICS (SHANGHAI) CO., LTD. established.
Co-sponsored " Kyoto City Half Marathon ."
Co-sponsored " St. Petersburg Stat Philharmony Orchestra."
Co-sponsored "Alfred Brendel Piano Recital."

2000

Europe Technology Center opened.
Developed new clock generator IC with the highest range of S/N and low jitter for DVD.
Developed REAL SOCKET? a revolutionary concept in system LSI design technology.
ROHM SEMICONDUCTOR(CHINA)CO.,LTD. established.
Co-sponsored "Seiji Ozawa Opera Project."
Co-sponsored "The Opening Concert of Autumn Kyoto Music Festival."

2001

ROHM CO., LTD. (Shinyokohama) opened.
Developed the technology (S!PWM×2) of silent disc driver for CD and DVD drives.
Developed high-power 180-mW laser diode as an optimum solution for ·32 and faster CD-RW drives.
ROHM APOLLO SEMICONDUCTOR PHILIPPINES, INC. established.
Started forestation project in Australia named " ROHM Forest ."
Contribution for Ritsumeikan University ROHM Plaza .

2002

Optical Device Research Center opened.

2003

LSI Test Technology Center opened.
Developed LVDS interface LSI for flat panel display.
ROHM ELECTRONICS TRADING (DALIAN) CO., LTD. established.
ROHM TSUKUBA CO., LTD. established.
Contribution for Doshisha ROHM Plaza .
Co-sponsored " Kyoto Student Festival."

2004

Shanghai Technology Center opened.
Taiwan Technology Center opened.
Developed REAL PLATFORM, a new platform design environment for system LSI.
Started the full-scale operation of the 300mm wafer process line.
Started mass production of the 130nm CMOS LSIs.

2005

Korea Technology Center opened.
Thermal printheads built with a proprietary Step-Free structure was developed. As a result, this Step-Free structure demonstrated high durability.
A thyristor was developed and mass production began.
A ROHM Plaza research facility was donated to Kyoto University .
Trees were planted around the circumference of the head office.
Co-sponsored "Seiji Ozawa Opera Project" in China .

2006

Shenzhen Technology Center opened.
Nagoya Design Center opened.
The world's highest performance silicon carbide (SiC) FET with a high voltage of 900V and low ON resistance of 3.1.Ω/cm2 was developed.
ROHM INTEGRATED SYSTEMS (THAILAND) CO., LTD. established.
ROHM ELECTRONICS (SHENZHEN) CO., LTD. established.
Hosted "ROHM Music Foundation, Music Seminar Member's Chamber Music Concert 2006"
Co-sponsored "HUNGARIAN NATIONAL PHILHARMONIC ORCHESTRA"

2007

ISO/IEC 17025 Accreditation to Laboratory.
Developed an ultra-compact LED "PICOLED TM [picoled]" featuring both the smallest volume and area in the world.