Advanced Diamond Technologies, Inc. (ADT), announces the introduction of UNCD® Horizon™, the world’s smoothest vapor-deposited diamond, to its family of award-winning diamond products. UNCD Horizon represents a generational leap in diamond wafer technology that brings the surface roughness of diamond films to levels comparable to electronic grade silicon wafers; opening up new vistas for the application of diamond into a wide variety of electronic and biomedical devices.
While ADT’s UNCD Wafers are known for their outstanding smoothness — on the order of 10 nanometers (nm) — UNCD Horizon improves the smoothness by an order of magnitude to 1 nm. Such exceptionally smooth diamond enables its integration with other materials and makes diamond feasible for a variety of groundbreaking applications such as: RF (radio frequency) MEMS (micro electrical mechanical systems) devices, nano imprint lithography (NIL), diamond nanophotonic technology, biosensors, and biomedical devices. UNCD Horizon also enables the direct bonding of diamond heat spreaders to transistors, solving one of the most vexing problems in the semiconductor industry, and permits the deposition of epitaxial silicon directly on diamond.
To achieve UNCD Horizon’s ultra-smoothness, ADT used an industry standard semiconductor process, chemical-mechanical planarization (CMP), and applied it to UNCD Wafers. “Using CMP opens up enormous possibilities for new applications leveraging wafer-scale processing techniques to make diamond-based devices,” said Dr. John Carlisle, ADT’s chief technology officer. Diamond, being the world’s hardest material, is notoriously difficult to planarize. “The key was to start with our UNCD Wafers, which are already smooth, and by using CMP create an astonishing level of precision that puts diamond on everyone’s technology roadmap,” said Neil Kane, ADT’s president.
UNCD Horizon makes surface acoustic wave (SAW) devices possible for mobile wireless applications that integrate diamond with highly optimized AlN (aluminum nitride) piezoelectric films. Such devices combine low insertion loss with high quality factors and higher frequency operation, directly integrated with CMOS drive electronics, thereby improving overall performance. Smoothness is critical for making devices that consume less energy. "The ability to produce diamond wafers with such ultra-smooth surfaces may open many new opportunities for diamond in RF electronics, in particular filters that work in the GHz frequency range," said Dan Stevens, Vectron International’s chief technology officer.
Columbia University is using UNCD Horizon for NIL which allows researchers to mold nanoscale patterns with sub-10 nm resolution into substrates that are used to manufacture biological flow cells and semiconductors. UNCD Horizon is uniquely suited for the fabrication of nanoimprint molds because it allows for feature sizes on the order of a few nm with excellent mechanical properties as well as low stiction and biocompatibility. “UNCD Horizon’s very low roughness meets our needs to make nanoimprint molds durable enough for the high pressures and mechanical forces applied during the nanoimprint process,” said Mark Schvartzman of Columbia University’s Nanotechnology Center for Mechanics in Regenerative Medicine.