Patent ID: 11923195
Assignee: IBEAM MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A method of manufacturing a single crystal semiconductor structure, the method comprising:
providing an amorphous substrate;
forming a strain compensation layer on a lower surface of the amorphous substrate;
forming a lattice matching layer on the amorphous substrate, the lattice matching layer comprising two or more single crystal layers; and
forming a single crystal semiconductor layer on the lattice matching layer,
wherein the lattice matching layer comprises a direction control film disposed on the amorphous substrate, the direction control film comprising a single crystal structure, and a buffer layer comprising a material different from the direction control film, the buffer layer being disposed on the direction control film and comprising a single crystal structure,
wherein a thickness of the direction control film is less than 10 times a critical thickness hc, and
wherein the critical thickness hc is determined by a following equation:, h
   c
  
  =
  
   
    [
    
     b
     
      
       4
       ⁢
       
        π
        ⁡
        (
        
         1
         +
         μ
        
        )
       
       ⁢
       
        ϵ
        0
       
      
      )
     
    
    ]
   
   [
   
    
     ln
     ⁡
     (
     
      
       h
       c
      
      b
     
     )
    
    +
    1
   
   ]
  
 

(b: Burgers vector, μ: Poisson's ratio, and ε0: a degree of lattice misfit between the direction control film and the single crystal semiconductor layer).