Process Hierarchy

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  Silicon nitride low temp PECVD
Process characteristics:
Amount of material added to a wafer
Amount of material added to a wafer, must be 0.01 .. 2 µm
0.01 .. 2 µm
Ambient to which substrate is exposed during processing
nitrogen, silane, ammonia
Deposition rate
Rate at which material is added to a wafer
1150 Å/min
Material silicon nitride
Microstructure amorphous
Refractive index 2
Sides processed either
Temperature 200 °C
Wafer size
Wafer size
Equipment GSI ultratech
  • Other substrate and device materials may be considered. Please inquire if interested in depositing on other materials.
  • Graphite carrier used for wafers smaller than 100mm diameter.
Equipment characteristics:
Batch sizes 100 mm: 1, 25 mm: 5, 50 mm: 1, 75 mm: 1
MOS clean no
Wafer geometry
Types of wafers this equipment can accept
1-flat, 2-flat, notched, no-flat
Wafer materials
List of wafer materials this tool can accept (not list of all materials, just the wafer itself).
silicon on insulator, quartz (fused silica), silicon, Pyrex (Corning 7740)
Wafer thickness
List or range of wafer thicknesses the tool can accept
300 .. 1000 µm
  • These parameters not yet characterized: dielectric strength, film stress, wet etch rate.