Thin Film Design & Applications  
  
 
 
 
 

 

Materials Page
Terminology

Al2O3 (Alumina)

l (nm) n
250 1.73
300 1.67
400 1.64
500 1.62
600 1.61
700 1.60
800 1.59
900 1.58
2000 1.57

 

Bulk Properties

Melting Point:  2020 ºC
Density: 4.0 gm/cc

Young's
Modulus:
  53 Mpsi

 

 

Film Properties

Evap. Temp.: 2100 ºC
Film Growth:  crystalline with low packing density
Film Hardness:  Hard

Common uses:   Used for aluminum mirror protection coatings, in UV laser antireflection coatings and high reflectors.  Specimen support for electron diffration.

Comments:  High temperature dielectric.  Adhesion is good on glass, other oxide materials, and some plastics.  Less background oxygen is needed to obtain low absorbing films.

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