Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001

61.1 THIN LAYER DEPOSITION

 

· Thin layers can be mixed into surfaces using electron and laser beams,

  1. 1. A thin layer is deposited on a surface with other techniques,
    1. a) electrostatic vapor deposition
    2. b) a thin sheet is applied
    3. c) the material is delivered as the beams work
  2. 2. A laser or electron beam melts the surface and mixes the two materials

 

· The rates can be greater than 1 m/s

 

· Advantages,

  1. - radiation penetration is shallow
  2. - no chemical contamination
  3. - no gas or jets to disturb molten surface
  4. - high precision for delivery
  5. - automation is possible

 

· Disadvantages,

  1. - high capitol cost
  2. - beams narrow, so multiple passes required (slow)