Process Hierarchy

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  Nickel electroplating (sulfamate)
Process characteristics:
Thickness of material to be deposited.
Thickness of material to be deposited., must be 0 .. 500 µm
0 .. 500 µm
Material nickel
Sides processed either
Temperature 20 .. 55 °C
Wafer size
Wafer size
Equipment Plating cell
  • Requires a 10mm spot near edge of substrate fro electrical contact.
Equipment characteristics:
Piece dimension
Range of wafer piece dimensions the equipment can accept
4 inch
Piece geometry
Geometry of wafer pieces the equipment can accept
Piece thickness
Range of wafer piece thickness the equipment can accept
300 .. 1500 µm
Wafer geometry
Types of wafers this equipment can accept
no-flat, 1-flat, 2-flat, notched
Wafer holder
Device that holds the wafers during processing.
Wafer materials
List of wafer materials this tool can accept (not list of all materials, just the wafer itself).
glass (category), Pyrex (Corning 7740), quartz (single crystal), silicon
Wafer thickness
List or range of wafer thicknesses the tool can accept
300 .. 1500 µm
  • Total surface area to be
    plated must be provided by
  • A metal seed layer must be present on the substrate.
  • If using photoresist mold,
    plating preparation (descum)
    is recommended.
  • Bath condition: pH=3.5-4, mild