Patent ID: 11913136
Assignee: CRYSTAL IS, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A single-crystal AlN substrate having an ultraviolet (UV) transparency metric ranging from approximately 20 cm3 to approximately 5000 cm3 at a wavelength of interest of 265 nm, the UV transparency metric being defined in cm3 as:, d
  
    10
    ×
    F
    ⁢
    
      
    
    ⁢
    W
    ⁢
    
      
    
    ⁢
    H
    ⁢
    
      
    
    ⁢
    M
    ×
    
      a
      2
    
  

wherein d is a diameter of the AlN substrate in mm, FWHM is a full-width at half-maximum of an x-ray diffraction curve of the AlN substrate in radians, and a is an absorption coefficient of the AlN substrate at the wavelength of interest.