In a  Copper Flex Circuit, a very thin sheet of copper is first laminated to the flexible film substrate then chemically etched away, leaving copper traces.  The etching process is not as environmentally friendly and is more expensive than screen-printing silver traces.

The advantages of a copper flex metal dome switch are:

• Tactile Response
• Moisture Resistant
• High Reliability
• Many Forces To Choose
• Embedded LEDs
• Fiber Optic Backlighting
• Electoluminescent Backlighting