&lt;title&gt;Cutting and drilling of CVD diamond using a copper vapor laser&lt;/title&gt;

Riva, Rudimar; Christ, Bruce W; Rodrigues, N. A. S.; Trava-Airoldi, V.J.; Corat, Evaldo José

doi:10.1117/12.251195

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…In spite of the CVD diamond has a low absorption to the Nd:YAG laser line, the interaction is heated up by the laser energy leading to an increase of the temperature above 1300 ºC [5]. Therefore an opaque zone is formed due to the phase transformation from diamond to graphite and amorphous carbon, resulting in a very high absorption of the incident laser radiation and on material sublimation.…”

Section: Resultsmentioning

confidence: 99%

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Cutting of Free Standing CVD Diamond Films by Optical Fibre Guided Nd:YAG Laser

Boutinguiza

Quintero

Belmonte

et al. 2004

MSF

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The performance of the Nd:YAG laser to cut thick (500 µm) free standing CVD diamond films for electronic, optical and mechanical applications, is investigated. A pulsed Nd:YAG laser at a wavelength of 1064 nm was employed. The cutting parameters varied within the following ranges: pulse energy = 0.8-4.6 J; pulse width = 0.3-1.0 ms; cutting speed = 5-10 mm•s -1 ; frequency = 100-500 Hz. The structural and morphological modification of the cutting surface was evaluated by optical and electron microscopy, and micro-Raman spectroscopy. A minimum energy density of 50 kJ•cm -3 is required to get complete cuts. The columnar morphology of the CVD diamond films leads to a high heat dissipation along the normal direction to the diamond surface. This effect allows a limited amorphized area, which allows cutting at high speeds up to 15 mm•s -1 . The best cutting configuration is to impinge the laser on the nucleation side of the freestanding plate, due to the favourable thermal conductivity gradient. The high flexibility of this type of laser, given by the possibility to guide the laser beam by means of an optical fibre allows the automation of the diamond cutting process.

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Section: Resultsmentioning

confidence: 99%

“…Lasers offer an alternative to machining diamond pieces at high speed without significant surface contamination. Among many other reports on the literature about this subject, diamond plates have been cut and drilled by means of lasers [4,5].…”

Section: Introductionmentioning

confidence: 99%

Cutting of Free Standing CVD Diamond Films by Optical Fibre Guided Nd:YAG Laser

Boutinguiza

Quintero

Belmonte

et al. 2004

MSF

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“…The exceptional properties of CVD diamond, added to its conventional small thickness, make traditional machining and cutting methods difficult, expensive, slow, and lead to high probability of contamination at the worked surface. Lasers have been studied and applied as an inexpensive technique when compared to traditional machining, at high speed without significant surface contaminants [96,97].…”

Section: Laser Cuttingmentioning

confidence: 99%

Development, Properties, and Applications of CVD Diamond-Based Heat Sinks

Neto¹,

Fraga²,

Trava-Airoldi³

2020

Some Aspects of Diamonds in Scientific Research and High Technology

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Heat sink is an essential component to nanoelectronics, microelectronics, and optoelectronics applications because it allows the thermal management of devices such as integrated circuits (ICs), microelectromechanical systems (MEMSs), and graphic unit processing. There are different materials being employed for heat sink production. Among them, diamond has stood out due to its excellent chemical and physical properties. This book chapter focuses on the development, properties, and applications of CVD diamond heat sinks. It covers the basic concepts of heat conduction applied to CVD diamond as a heat sink material and its production as freestanding CVD wafers of polycrystalline CVD diamond, since the literature about this topic is extensive, giving the reader a comprehensive overview. We will comprise the use and potential widening of applications of in CVD diamond heat sink technology, providing the reader with a substantial background at the current development of solutions and new frontiers in the practical use of CVD diamond thermal management devices.

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“…Moreover, due to very hard and rough top surface of CVD grown PCD, researchers are hesitant to probe the as-grown PCD surface with their expensive Berkovich or other indenters [93][94][95]. In effect, there is not much literature [96][97][98][99][100] available which describes the mechanical properties [101,102] of CVD grown PCDs.…”

Section: Introductionmentioning

confidence: 99%

Some Aspects of Diamonds in Scientific Research and High Technology

Lipatov¹

2020

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The electrical properties of diamond are significantly affected by the charge of the surface states of the sample. Depending on the type of chemisorbed elements, the electronic affinity of the diamond surface is changeable [36, 37]. The detection of negative electron affinity of the diamond surface (downward bending of zones, the absence of a potential barrier) determined the studies on the creation of cold cathodes and electron emitters based on diamond coatings [38].Due to the strong covalent bonds, diamond is a chemically inert material and is suitable for medical and biotechnological applications [10]. In this case, such diamond properties as low cost of nanoparticles, the possibility of surface activation by photochemical methods, high photoluminescence yield and its resistance to photobleaching, low cytotoxicity, and, as a consequence, environmental safety are used.The collection of scientific chapters proposed to the reader reflects some of the aspects, mentioned above. This collection will be useful to students, graduate students, and researchers who are interested in such disciplines as the synthesis of carbon and superhard materials, carbon electronics and photonics, surface chemistry, etc.

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<title>Cutting and drilling of CVD diamond using a copper vapor laser</title>

Cited by 4 publications

References 8 publications

Cutting of Free Standing CVD Diamond Films by Optical Fibre Guided Nd:YAG Laser

Cutting of Free Standing CVD Diamond Films by Optical Fibre Guided Nd:YAG Laser

Development, Properties, and Applications of CVD Diamond-Based Heat Sinks

Some Aspects of Diamonds in Scientific Research and High Technology

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