| 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. |
| 2023 |
Oct. |
In order to increase production of AMB (active metal brazed) aluminum nitride substrates, the first floors of buildings A and B have been connected. |
| 2024 |
Oct. |
To increase production of AMB (active metal brazed) aluminum nitride substrates, we have expanded the south side of Building C. |
