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Structured Copper: A Potential Solution for Manufacturing High Power Converter…

Award Information

Department of Defense
Award ID:
Program Year/Program:
1997 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Silicon Power Corporation
275 Great Valley Parkway Malvern, PA 19355-1308
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Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
Phase 2
Fiscal Year: 1997
Title: Structured Copper: A Potential Solution for Manufacturing High Power Converter Systems
Agency / Branch: DOD / NAVY
Contract: N/A
Award Amount: $1,905,251.00


We propose the development of a very-high-voltage, large area MOS Turn-Off Thyristor (MTO) to replace the Gate Turn-Off Thyristor (GTO) in high power converter systems ranging from 1 to 20 MVA. Because a GTO rated to turn off 2000 A typically requires a turn-off current of 800 A, the most unreliable feature in GTO applications is the gate circuit that provides this high current turn-off pulse. The MTO incorporates the main features of proven GTO technology to achieve the highest available voltage, current, and thermal stability. However, the MTO incorporates a high impedance turn-off gate structure based on an MOS transistor which allows for a much smaller, lower cost, and potentially much more reliable gate circuit. Furthermore, the turn-on gate of the GTO can be preserved in the MTO or, optionally, it can be replaced by a buried gate structure for faster operation. SPCO has already demonstrated a 6kV / 1200 A hybrid version of the MTO. The integrated MTO, which will provide the highest system reliability, requires that an MOS transistor be fabricated directly on high-voltage device wafers. This necessitates further detailed simulation and design efforts for both the device physical properties and for its fabrications processes.

Principal Investigator:

Dr. Rik De Donker

Business Contact:

Small Business Information at Submission:

Silicon Power Corp.
175 Great Valley Parkway Malvern, PA 19355

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No