Advanced Considerations in Tail Exit Design for Membrane Switches

25 Nov, 2023

By hqt


Tail exit design in membrane switches is a nuanced aspect that demands careful consideration. Enhanced details on PET silver conductive lines, positioning for waterproofing, and material selection based on circuitry underscore its complexity.

Protective Measures for PET Silver Conductive Lines

Use of UV Ink or Protective Film

In membrane switches, the PET silver conductive lines are prone to damage from metal components during installation, leading to potential short circuits. To mitigate this risk, these lines are often coated with UV ink or covered with a protective film. This layer serves as a safeguard, preventing scratches and physical damage.

Positioning for Enhanced Waterproofing

Tail Exit Placement

The placement of the tail exit is crucial for the switch’s longevity, especially in terms of waterproofing. Positioning the tail exit away from the product’s edges significantly enhances its resistance to water ingress.

Material Choices Based on Circuitry

Diversity in Material Options

The material used for the tail exit varies depending on the type of circuit:

  • For PET Membrane Switches: Typically, silver conductive ink is printed on PET substrates.
  • For PCB-based Switches: Options include Flexible Printed Circuits (FPC) or extended pin connectors.
  • FPC Variations: The choice of FPC can be diversified based on user requirements and PCB design, offering flexibility in design and functionality.


Understanding the detailed aspects of tail exit design, from protective measures to strategic placement and material selection, is key to developing efficient and durable membrane switches. These considerations are integral to the design process, ensuring the switches perform optimally in their intended applications.

Summary Table: Tail Exit Design Considerations

Protective CoatingUse of UV ink or protective film on PET silver linesPrevents damage and short circuits
Tail Exit PlacementPositioned away from product edgesEnhances waterproofing capabilities
Material ChoicePET with silver ink, FPC, or pin connectors based on circuit typeTailored to circuit requirements and user needs

This revised article, along with the table, provides a deeper understanding of the intricacies involved in designing the tail exit of membrane switches, highlighting protective strategies, waterproofing considerations, and material choices tailored to specific circuit types.


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