About Us

Company Name DOWA POWER DEVICE Co., Ltd.
Address 9637-3 Kataoka, Shiojiri-shi, Nagano, 399-0711 JAPAN
Capital 100 million yen
Number of Employees 147 *As of April 1, 2024
Foundation December 1992
Established May 2006
Business Activities Development and manufacture of metal ceramic substrates
Representative Representative Managing Director, OSANAI Hideyo

Organization Chart

Organization Chart

History

1985 Apr. Began research on copper-alumina substrates at the Hachioji Central Research Laboratory of DOWA MINING Co., Ltd. (Current DOWA HOLDINGS CO., LTD.)
Oct. Started shipping samples of DBC (direct bonded copper) alumina substrates.
1987 Mar. Constructed a plant for mass production of DBC (direct bonded copper) alumina substrates at the Hachioji Central Research Laboratory.
Apr. Began research on AMB (active metal brazed) aluminum nitride substrates at the Hachioji Central Research Laboratory.
1992 Dec. DOWA MINING Co., Ltd. Shiojiri Plant A completed in Nagano as a mass production factory for DBC (direct bonded copper) alumina substrates.
1993 Apr. Began mass production of DBC (direct bonded copper) alumina substrates at the Shiojiri Plant.
1994 Oct. Began research on ALMIC substrates at the Hachioji Central Research Laboratory.
1995 Sept. Completed construction of Shiojiri Plant B for AMB (active metal brazed) aluminum nitride substrates.
1996 Feb. Developed AMB (active metal brazed) aluminum nitride substrates with fillet for stress relief.
1997 Aug. Moved the ALMIC manufacturing facilities from the Central Research Laboratory to the Shiojiri Plant.
Sept. Began mass production of ALMIC substrates.
2001 Oct. Began mass production of thin DBC (direct bonded copper) alumina substrates.
2006 May Reorganized to DOWA POWER DEVICE Co., Ltd. due to spin-off of DOWA MINING Co., Ltd.
2008 May Completed construction of DOWA POWER DEVICE Plant C.
2011 Dec. Started mass production of aluminum-metalized Integrated Substrates for new energy applications.
2012 Sept. Expanded Plant B for increased production of AMB (active metal brazed) aluminum nitride substrates
2015 Nov. Expanded testing building for aluminum-metalized Integrated Substrates for automotive applications.
2018 Apr. Completed DOWA POWER DEVICE Plant D for increased capacity of aluminum-metalized Integrated Substrates.
Nov. Started processing of copper-silicon nitride substrates.
2022 Dec. Celebrated the 30th anniversary of our establishment.

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