Diamond Seeds and Substrates

Larger, harder, serving a broader range of applications

Seki Diamond supplies single crystal diamond seeds and substrates fabricated by Excellent Diamond Products (EDP), the world’s leading manufacturer of this class of product. The CVD-grown single crystals are lifted off from seed crystals using a unique ion implantation process. Large mosaic crystals, consisting of 4 or 9 mono crystals, can be used for large tool blanks or large substrates.

These are the only diamond blanks available with edge length longer than 10mm. Superior hardness gives these crystals better wear resistance than HPHT. EDP crystals can be applied in optical parts for UV to far IR. They can be exposed to high energy density beams, and the ultra-thin, highly transparent plates serve as excellent X-ray windows. Exceptional hardness, size, purity and numerous other special features make EDP diamond the optimum choice for a broad spectrum of applications.

Advantages of EDP single crystal diamond

Greater hardness and toughness than natural or HPHT diamond
Planar substrates with high purity, inclusion free and sector free
Single-crystal diamonds up to 10mm square
Mosaic-process diamonds up to 28mm square
Thickness from 0.01 to 2.5mm, ultra-thin available to less than 50µm
(110) and (111) plates for tools and electronics
Laser-cut custom shapes: circles, squares, rectangles, triangles, etc.
Single- or double-sided polishing available to Ra >5nm
Ideal thermal diffusion coefficient to protect devices from generated heat

Many Applications

Gem Diamond Production

Mechanical

— Water jet nozzle orifices
— Wire drawing machine dies
— Surgical diamond blades
— Single Point Diamond Turning (SPDT) blanks
— Milling tool blanks

Optical

— UV, IR, MW, X-ray windows
— Laser optics components

Semiconductor

— Heat spreaders
— Sub-mounts for high-power IC & laser diodes

Electronics

— HEP radiation detectors
— Beam condition monitors
— RF diodes, BJT, FET, MEMS
— Radiotherapy dosimeter

Download EDP brochure