Etch recipe allows engineers and product developers to design diamond devices

NewsGuard 100/100 Score

Advanced Diamond Technologies (ADT) is making broadly available an etch recipe which enables engineers and product developers to reliably and affordably design micro devices and sensors out of diamond.

Based on research published in the November/December 2009 issue of the peer-reviewed Journal of Vacuum Science & Technology B (JVST B), the etch recipe is available for download from ADT’s website at Using standard processes available in most foundries, this dry etch recipe enables designers to develop cutting-edge diamond micro devices and sensors while eliminating the complexity traditionally associated with diamond.

“A whole generation of 2D and 3D diamond structures are now conceivable such as high performance RF MEMS devices and accelerometers”

“The process to make diamond available, accessible, and affordable is complete. We have published this recipe so diamond can be incorporated into process flows using the same equipment and materials used to process silicon. We’ve eliminated the risk—and mystery—of how to make diamond devices and we hope to stimulate the creativity and ingenuity of designers to make diamond devices without having them worry about processing steps,” said ADT’s president, Neil Kane.

The article, “Nanofabrication of Sharp Diamond Tips by E-beam Lithography and Inductively Coupled Plasma Reactive Ion Etching,” describes the etch recipe developed while creating sharp diamond tips for atomic force microscopy (AFM) probes. The dry etch recipe was optimized to achieve a maximum etch rate of 650 nm/min using ADT’s UNCD® Wafers. Parameters to achieve slower etch rates are also outlined which are applicable for developing delicate nano-structures. Process steps for creating and patterning the hard mask, a 350 nm thick plasma-enhanced chemical vapor deposited SiOx layer, are also detailed.

“We have customers using our UNCD Wafers to make diamond products as diverse as AFM probes, switches for phased-array radar, biosensors to detect E. coli in water, LED lighting, and boron-doped diamond electrodes for water purification. A simple, optimized etch recipe makes the adoption of diamond very straightforward,” says ADT’s chief technical officer Dr. John Carlisle. “A whole generation of 2D and 3D diamond structures are now conceivable such as high performance RF MEMS devices and accelerometers,” said ADT’s MEMS lead scientist and lead author of the JVST B article, Dr. Nicolaie Moldovan.

The development of an optimized dry etch capability is part of ADT’s ongoing research to advance its 2009 R&D100 Award winning NaDiaProbes®, the world’s first all-diamond AFM probes, which are created using UNCD Wafers as a starting material. NaDiaProbes are not diamond-coated probes or pieces of diamond mounted on cantilevers; rather the entire cantilever and tip assembly is made of UNCD, a thin-film form of nanocrystalline diamond.

ADT gratefully acknowledges its continuing collaboration with Argonne National Laboratory (Argonne) which is a co-author of the JVST B article. NaDiaProbes were developed with a grant from the National Science Foundation’s SBIR/STTR program.


Advanced Diamond Technologies


The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

You might also like...
Research validates anti-inflammatory properties of wine using urinary tartaric acid as biomarker