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Novel Polishing Process to Fabricate Ultra Low Thickness Variation Diamond Substrates for Next Generation Beam Tracking Detectors

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-11ER90095
Agency Tracking Number: 97837
Amount: $999,507.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: 45 b
Solicitation Number: DE-FOA-0000676
Solicitation Year: 2012
Award Year: 2012
Award Start Date (Proposal Award Date): 2012-08-08
Award End Date (Contract End Date): 2014-08-07
Small Business Information
1912 NW 67th Place
Gainesville, FL -
United States
DUNS: 024935517
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Arul Arjunan
 (352) 334-7237
Business Contact
 Deepika Singh
Title: Dr.
Phone: (352) 334-7237
Research Institution

Diamond crystals with small total thickness variation (TTV) and local thickness variation (LTV) values are needed for position sensitive fast particle detectors for particle tracking/timing, and detecting direct/indirect beams. The fabrication of ultra-flat, low surface defectivity diamond detectors represents a major technological challenge. Although current commercial technology can produce 100m thick, high quality diamond crystals, the current state-of-the- art polishing methods are unable to polish diamond crystals with low thickness variation (typically lesser than few microns). Sinmat has developed a novel reactive chemical mechanical polishing (RCMP) process to polish, planarized, and flatten diamond crystals free of surface/subsurface defects. By combining this RCMP process with special engineered sample holders, ultra-low TTV and LTV surfaces can be fabricated (with TTV lesser than 1 micron) for high performance detector applications. In the Phase I part of the project, Sinmat had demonstrated ultra flat diamond crystals with surfaces free of damage and scratches. By combining the RCMP process and special samples holders, we were able to achieve ultra-flat surfaces. Such RCMP polished diamond crystals have shown excellent detector performance with 3X increase in pulse height. In the Phase II effort, the RCMP process will be further optimized to achieve ultra low TTV diamond crystal detectors for beam tracking applications at FRIB- NSCL facilities. Commercial Application and Other Benefits: The ability to achieve ultra-flat and defect free diamond crystals will be very beneficial for several applications in the fields of nuclear instrumentation, nuclear radiators, X-ray optics, and next generation electronics. Such devices will help in improving detection systems, instrumentation, and various techniques used in nuclear physics. Such engineered ultra-smooth diamond substrates could also be used for heat dissipation in silicon based electronics.

* Information listed above is at the time of submission. *

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