Membrane Keypad

Membrane keypads and membrane switches offer designers of electronic equipment a flexible, customizable user interface which is compact, versatile, reliable and assembly friendly.

Permark offer many options - simply contact us and we will provide technical advice, free samples and a no obligation quote.

Construction

Constructed of layers of polyester (PET) film combined with spacers and adhesive, electrically conductive inks are printed onto the film to form a circuit. Total thickness is typically 1-2mm. Depending on the application and environment, graphic overlay materials can be specified to resist harsh environments such as high moisture, high UV and chemicals. Tactile Feedback of switches can be built into the keypads by insertion of stainless steel tactile discs or embossing of the overlays. Permark can supply either Female Clinch or ZIF connectors (see specifications here)

 

Applications

Electronic Equipment requiring a user interface such as:

• Eftpos Terminals
• Hand held instruments/test equipment
• Electric Fence Controllers
• Petrol Station Pump Keypads
• Weighting & Measuring Equipment

Quality Tests

In addition to standard quality checks through the production process, Permark performs testing for:

• Button Actuation force (when specified)
  
• Switch Actuation life (mechanical finger)
• Loop Resistance (all work)
  
• Continuity / High Resistance test (every switch)
  

Understanding your needs

 

We can assist with advice at the design stage of a product development. Contact us here. Information that is helpful in providing an accurate quote will include the following:

• Company Contact Details
• Quantity Required?
• Dimensions of membrane?
• Tail Length?

Operating Voltage

• Operating Voltage (V)?
• Operating Current (mA)?
• Max Loop Resistance (ohms)?
• EMI Shielding required?
  
• ESD Shielding required?
  

Contact Configuration

• Matrix?
• Common bus?
• Combination?

Tactile Switching

• Stainless Steel Inserts?
• Inserts & Emboss?
• Emboss Only?

Termination

• None?
• Clampon Female?
• ZIF?

Usage

Estimate of daily key actuation

• Low (0-15 actuations per day)
• Med (30 + actuations per day)
• High (100 + actuations per day
  

Environment

• Outdoors?
• Humidic Sealing?
• Chemical or toxic exposure?

Overlay

• Number of colours?
• Material Finish (Gloss or Matt)?
• LED Display or Windows?
• Transparent Tints or Dead fronts?

Click here to contact us for technical advice, free samples or a no obligation quote.