carbon ink PCB

carbon ink PCB for cost-effective keypads and contacts

A carbon film board refers to a printed circuit board (PCB) with a conductive layer formed by printing carbon ink onto its surface. It is commonly used in applications requiring wear resistance and conductivity, such as buttons and sliding contacts, serving as an economical and practical PCB surface treatment method.

Description

Carbon Film Boards (Carbon Ink PCB / Carbon Printed Circuit Board)

Description

Carbon film boards, commonly referred to as Carbon Ink PCB or Carbon Printed Circuit Board, are printed circuit boards (PCBs) where a layer of specialized carbon ink (carbon paste) is applied via screen printing or similar processes to form circuits or contact points on the board surface. Their primary function is to create conductive carbon layers in specific PCB areas, typically used for push buttons, switches, contacts, jumpers, variable resistors, potentiometers, and similar components.

Key Features

  • Stable conductivity: Carbon film possesses inherent electrical conductivity, making it suitable for buttons, contacts, and similar components.
  • Excellent wear resistance: The carbon film surface resists abrasion, ideal for areas subject to frequent contact or sliding.
  • Cost-effective: Significantly more economical than metal plating processes like gold or silver plating.
  • High processability: Flexible printing of carbon film in various shapes and thicknesses according to design specifications.

Typical Applications

  • Light-touch switches and keypads in electronic products.
  • Remote control buttons.
  • Membrane switches for electronic scales, calculators, etc.
  • Contact points for variable resistors and potentiometers.