Diamond Raw Materials: CVD Seeds, Rough and Blanks
Diamond Seed Crystal - Rough Blank
DIAMOND SEEDS & BLANKS
What Are Diamond Seeds and Blanks Used For?
Diamond seeds and blanks are upstream diamond raw materials for CVD crystal growth, diamond film deposition, tool manufacturing, and jewelry cutting and polishing. Products include CVD single-crystal seeds, unground and unpolished single-crystal blanks, nanodiamond seed suspensions and powders, and polycrystalline blanks. As a CVD rough diamond supplier, Alishan Diamond provides materials that can be selected according to the growth equipment, substrate material, crystal orientation, nucleation method, and downstream processing flow.
PRODUCT SELECTION
How Should CVD Seeds, Nanodiamond Seeds, and Diamond Blanks Be Selected?
CVD Single-Crystal Seeds
Used as the starting point for diamond homoepitaxial growth. Options can be selected according to size, sidewall crystal orientation (100) or (110), chamfering method, and polishing conditions.
CVD Single-Crystal Blanks
These retain the original machining allowance after crystal growth and are suitable for downstream customers who plan their own cutting orientation, dimensions, grinding, and polishing.
Nanodiamond Seed Suspensions
Compatible with spin coating or ultrasonically assisted seeding, these are suitable for processes seeking to simplify substrate pretreatment before seeding.
Nanodiamond Seed Powder
Intended for users with dispersion and formulation capabilities who need to adjust solution concentration, carrier medium, and seeding conditions themselves.
Polycrystalline Blanks
Suitable for larger-area diamond material requirements and available for downstream processing into heat spreaders, tool blanks, or other functional components.
PROCESS & INSPECTION
Processes and Inspection Items for CVD Diamond Materials
Alishan Diamond provides seed selection, CVD growth, precision cutting, grinding and polishing, and material quality inspection. Seed, blank, and nucleation-material specifications can be discussed according to epitaxial growth, film, tool, or jewelry-processing applications.
For seeds used in epitaxial growth, crystal orientation, dimensions, surface flatness, cleanliness, and edge geometry should be confirmed. For nanodiamond seeds used to nucleate non-diamond substrates, particle-size distribution, concentration, dispersion condition, carrier medium, and storage conditions should be confirmed.
TECHNICAL EVALUATION
What Seed or Blank Specifications Are Required Before Requesting a Quote?
Please provide the application, substrate material, CVD equipment or process conditions, crystal orientation, dimensions and thickness, surface condition, chamfering requirements, nanoparticle size or slurry concentration, packaging method, quantity, and downstream processing requirements. For epitaxial applications, please also specify acceptable defects, cleanliness, surface specifications, and acceptance methods.
