Multi-Layer Strategies

Contents

 

1 Preferred Method #1

2 Preferred Method #2

3 Multilayer Fit Strategy

3.1 Strategy #1

3.2 Strategy #2

3.3 Additional Strategy

4 Repeated Layer Structures

 

1. Preferred Method #1

  1. Measure n,k from single-layers: use dispersion models.
  2. Fit thickness only.
  3. If poor fit, add dispersion parms. for least stable film.


2. Preferred Method #2

  1. Measure n,k for each “new” layer with previous layers fixed: use dispersion models.
  2. If poor fit, add thickness and then dispersion parameters for previous layers.


3. Multilayer Fit Strategy

3.1 Strategy #1

  1. Measure “n, k” from single layer samples.
  2. Then, fit thicknesses only for multi-layers.

3.2 Strategy #2

  1. Fix “n, k” for known layers.
  2. Use dispersion or alloy models for unknown layers.

3.3 Additional Strategy

  1. If same coating is repeated in stack, use same (coupled) optical constants for each.

4. Repeated Layer Structures