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February 25, 2008
ADT announces revolutionary family of diamond pump seals.
Click here to see the full announcement.
February 4, 2008
DOE features ADT in a case
study on Energy Efficient Technologies.
January 26, 2008
Mechanical seal performance improvement after UNCD is featured in the cover
story, "Reliability Galore - Diamonds Are For Seal Faces" in the January
2008 issue of
Maintenance Technology.
December 26, 2007
ADT Co-founder Orlando Auciello interviewed
for CNN's Situation Room regarding UNCD's role as a potential base in a bioterrorism detection system.
December 20, 2007
"Are
Diamonds a MEMS' Best Friend?" article featured in IEEE microwave magazine's
December 2007 issue explains how UNCD is poised to play a powerful role in the
future of RF MEMS.
See more news items...
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What is Ultrananocrystalline diamond (UNCD)? |
UNCD® (Ultrananocrystalline Diamond ) captures many
of the best properties of natural diamond in a scalable thin film
technology that enables diamond to be integrated into a wide range
of products. UNCD is the term that encompasses a proprietary family
of materials that are manufactured using patented chemical vapor
deposition processes. UNCD can also have unique properties not found
in any other carbon-based material that can be adjusted and optimized
for a given application.
UNCD coatings are not diamond-like carbon films, but phase-pure
crystalline materials consisting of diamond grains ranging from
2-5 nm up to 1 micron in size depending on the variety of UNCD.
Currently ADT offers the following subtypes of UNCD films:
UNCD Aqua™. The award-winning UNCD
Aqua series of films developed by ADT are industrial-strength
coatings that can be deposited on a wide range of materials including
silicon wafers up to 200 mm in size and multiple 2D and 3D specimens
simultaneously. UNCD Aqua is synthesized using certified processes
that are the ultimate in repeatability and reliability. UNCD Aqua
is optimized for demanding applications including MEMS,
mechanical seals for pumps and
cutting tools, among others.
Mechanical and Tribological
- Extreme hardness.
- Extremely wear resistant.
- Extremely strong. Just as strong as single-crystal
diamond.
- Smooth. Very low surface roughness.
- Thin. Ultrathin pinhole-free films can be produced.
- Thick. Films thicker than 10 microns can easily be
grown (with low surface roughness).
- Excellent adhesion. UNCD films exhibit very good adhesion
and can be deposited on a number of different substrate materials
such as Si, SiO2, Ti, W, Ta, Mo, SiC, SiN, Pt, and
Al.
- Very low friction. Coefficients of friction as low
as 0.03 in air.
- No stiction. Hydrophobicity eliminates stiction in
MEMS components, reducing manufacturing and packaging costs,
while enhancing reliability.
- Low film stress. Critically important for materials
integration in MEMS and other thin film applications.
Chemical
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Chemically stable and
inert. Same surface chemistry as natural diamond.
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Hydrophobicity. Can be rendered either hydrophobic or hydrophilic by
adjusting surface chemistry.
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Electrochemistry. Very wide working potential window, low
background currents.
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Corrosion protection. Diamond surface chemistry and ultrathin
continuous films provide protective coatings.
Electrical
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| UNCD Tip Array |
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Electrically
conductive or insulating. High room temperature N-type and P-type
conductivities have been demonstrated.
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Electron emitters. Low threshold, stable field electron emission has
been demonstrated.
Biocompatibility
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Surface
functionalization. Probe molecules can be covalently attached with high
stability for biosensors.
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Bio-inert. Can be
used in biomedical applications such as bioMEMS sensors and implants.
Microfabrication friendly
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| Conformal Deposition |
- Low deposition temperatures. Compatible with
fragile electronics and low-melting point metals such as aluminum.
- Conformal coatings. Capable of coating high-aspect-ratio
structures with conformal, smooth layers.
- Etching. UNCD can be etched using reactive ion
etching or wet chemical etching processes.
For MEMS, UNCD enables devices to be fabricated that are:
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Faster. High acoustic velocity permits faster high frequency resonators.
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| UNCD Cantilevers |
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More reliable. Low
stiction, friction, thermal stability and superior wear resistance.
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Versatile. Can be
deposited on a range of substrates and also integrated into complex thin film
heterostructures. Can be used in harsh environments. .
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Copyright 2004-2008. Advanced Diamond Technologies, Inc.
429 B Weber Road #286, Romeoville, IL 60446. Phone: 815-293-0900
UNCD is a registered trademark of; NaDiaProbe, DoSi, DOI, We Solve Hard Problems,
We Haven't Even Scratched the Surface, Diamond is an Engineering Material and
the ADT logo are trademarks of Advanced Diamond Technologies, Inc.
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