SPI Sputter/Carbon Coating Systems

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This special built-in option provides the means to etch away surface layer contaminants from the sample, then sputter gold onto it without breaking vacuum. However, it is important to understand that the etch mode essentially reverses the polarity of the system, so that one is then sputtering off of the sample instead of sputtering onto the sample. Since the same laws of physics would apply in either case, remember that what can be removed is going to be more or less limited to what can be sputtered onto the sample in this type of unit, namely precious group metals. Since the same laws of physics are operating in any low voltage sputter coater of this type, this inability to etch away other materials, such as polymers or other organics is not unique to the SPI unit. Examples of good applications for the etch mode: Removal of gold from an already coated sample. Demonstration of solid state phase structures in complex precious metal alloys. Removal of gold from thick film systems to better reveal the glass frit.

• Removal of carbonaceous layers prior to gold coating.
• Etching of polymer coatings to reveal underlying pigment dispersion.
• Removal of glass passivation layers on electronic devices.

Note: Option is built in to the Sputter Coater Module upon ordering and cannot be retrofitted. (See Options.)

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• SPI Sputter / Carbon Coating Table of Contents
• SPI Supplies Catalog Table of Contents
• SPI Supplies Home Page

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