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ABSTRACT DIAMOND films prepared by chemical vapour deposition (CVD) have received considerable attention because of their high thermal conductivity, optical transparency, hardness, inertness

and semiconducting properties1,2. The control of film geometry (by thinning, polishing, patterning and shaping) is essential for most applications. Polishing by reaction with oxygen gas or

ions usually results in pitting at grain boundaries3,4, and other techniques5–8 are generally slow. Thinning or polishing of single-crystal diamond9 and CVD films4,10 by high-temperature

diffusional reaction with solid transition metals has been reported previously. But these approaches require either a hydrogen atmosphere9, which is undesirable industrially, or high

pressures (200–3,000 p.s.i.) during the heat treatment4,10. We report here a method for shaping and thinning which does not suffer from these limitations. It involves the use of molten

rare-earth metals such as cerium or lanthanum to etch away the diamond film surface. Substantial thinning and shaping can be achieved in just a few hours. We anticipate that this technique

may open up new applications of diamond films in optics and biomedicine. Access through your institution Buy or subscribe This is a preview of subscription content, access via your

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* Learn about institutional subscriptions * Read our FAQs * Contact customer support SIMILAR CONTENT BEING VIEWED BY OTHERS SCALABLE PRODUCTION OF ULTRAFLAT AND ULTRAFLEXIBLE DIAMOND

MEMBRANE Article 18 December 2024 FOCUS MOVEMENT DISTANCE PER PULSE DEPENDENCE OF ELECTRICAL CONDUCTIVITY AND DIAMETER OF DIAMOND INTERNAL MODIFICATION INDUCED BY PICOSECOND LASER Article

Open access 31 October 2022 DAMAGE-FREE HIGHLY EFFICIENT PLASMA-ASSISTED POLISHING OF A 20-MM SQUARE LARGE MOSAIC SINGLE CRYSTAL DIAMOND SUBSTRATE Article Open access 10 November 2020

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Diagrams_, 2nd Edn (eds Massalski, T. B. _et al._) 856 (ASM International, Metals Park, Ohio, 1990). Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * AT&T Bell

Laboratories, Murray Hill, New Jersey, 07974, USA S. Jin, J. E. Graebner, M. McCormack, T. H. Tiefel, A. Katz & W. C. Dautremont-Smith Authors * S. Jin View author publications You can

also search for this author inPubMed Google Scholar * J. E. Graebner View author publications You can also search for this author inPubMed Google Scholar * M. McCormack View author

publications You can also search for this author inPubMed Google Scholar * T. H. Tiefel View author publications You can also search for this author inPubMed Google Scholar * A. Katz View

author publications You can also search for this author inPubMed Google Scholar * W. C. Dautremont-Smith View author publications You can also search for this author inPubMed Google Scholar

RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Jin, S., Graebner, J., McCormack, M. _et al._ Shaping of diamond films by etching with molten rare-earth

metals. _Nature_ 362, 822–824 (1993). https://doi.org/10.1038/362822a0 Download citation * Received: 14 January 1993 * Accepted: 12 March 1993 * Issue Date: 29 April 1993 * DOI:

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