title: Layer (electronics)
text: # Layer (electronics)
  
  A layer is the deposition of molecules on a substrate or base (glass, ceramic, semiconductor, or plastic/bioplastic).
  
  High temperature substrates includes stainless steel and polyimide film (expensive) and PET (cheap).
  
  A depth of less than one micrometre is generally called a thin film while a depth greater than one micrometre is called a coating.
  
  A web is a flexible substrate.
  
  