Due to the inherent transparency of diamond across a wide wavelength range, optical methods of characterization have long been the go-to methods for characterizing inclusions, impurities, and color-causing defects. Except for diamond window applications, it is usually these features that make the diamond most interesting or valuable.
Diamond is the hardest of all natural materials. The hardness of any given material is usually determined by pressing a carefully shaped indenter onto a surface under a load, resulting in a permanent plastic deformation. Read more…
Diamond is transparent from the UV (225 nm) to the far infrared. Only minor absorption bands exist resulting from two-phonon absorption between 2.5 and 6.5 µm. This makes diamond an ideal material for multispectral optical Read more…
Diamond is unmatched as a thermal conductor. It is informative to compare the thermal conductivity of diamond to that of other materials with which it may be used or with which it may compete. Polycrystalline Read more…
Diamond’s potential as an electronic material has become legendary by virtue of its wide band gap (5.5eV), high carrier mobility, breakdown field, saturation velocity, and thermal conductivity. If this potential can be realized, diamond is Read more…
Optical grade single crystal diamond plates
Tolerances:
Optical grade single crystal diamond plates
Tolerances:
1mm thick diamond plate, (100) orientation on large faces, high nitrogen content, grown via a high-pressure, high-temperature (HPHT) process.
Laser-induced graphitization interior to bulk diamond forming monolithic electronic structures.
Voucher award grants discounted access to 90 core equipment facilities at 5 University of Massachusetts campuses.
The Northeast Microelectronics Coalition (NEMC) Hub is a network of 200+ organizations, including commercial and defense companies, leading academic institutions, federally funded R&D centers (FFRDCs), and startups concentrated in eight Northeast states. Established in 2023 and funded through the CHIPS and Science Act, the NEMC Hub is one of eight regional Microelectronics Commons Hubs acting on a shared mission to expand the nation’s global leadership in microelectronics and accelerate domestic semiconductor prototyping.
LADDIS seeks to develop techniques for substrates for diamond semiconductors with diameters larger than 50 millimeters, dislocation density below 103 square millimeters, surface roughness below 0.2 nanometers, and good electrical, thermal, and mechanical properties.
Rapid Growth of High-Quality Single
Crystal Diamond by a Toroidal Plasma
Process: New Domains Enabled by Computational Fluid Dynamic Modeling
Reporting on the
*Low-strain diamond epitaxy on a high strain substrate
*Growth rates of 160 um/hr of optical grade material.
*Low-temperature (650C) polycrystal growth rates up to 6.2um/hr
Diamond's properties (highest thermal conductivity, high hole & electron mobilities, & high electric breakdown field) predict that diamond field‐effect transistors (FETs) will have superior high‐power high‐frequency performance over FETs formed in other semiconductors. This article reviews the state of the art for FET and substrate development.
A buffer layer is employed to fabricate diamond membranes and allow reuse of diamond substrates. In this approach, diamond membranes are fabricated on the buffer layer, which in turn is disposed on a diamond substrate that is lattice-matched to the diamond membrane.
After NO2 exposure of H-terminated diamond, used for field effect diamond transistors, no NO2– is present on the diamond surface, but instead NO3–.
Surface H and NO3– concentrations and surface conductance are stable in dry N2.
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15 years of CVD diamond growth and development |
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