Membrane Switches

At SKOUPAS we have products and services that effectively cover the needs of business areas throughout Attica, with special regard to the graphic components required for their proper operation.

Since the very beginning of our operation, our main expertise has been the design and production of membrane keyboards. These keyboards consist of thin, flexible electrical switches that are typically used in a variety of electronic devices and control panels, such as cash registers, computers, etc.

They consist of multiple layers, including a flexible membrane with printed circuits, a top graphic overlay with labels or symbols, and a bottom layer with adhesive backing. When you press a key or button on the overlay, it makes contact with the circuit beneath, completing an electrical connection and registering the input.

Membrane switches are known for their durability, resistance to moisture and contaminants, and suitability for applications where space and cost are considerations, such as in keyboards, remote controls, and industrial control panels, etc.

Assembly of the membrane step-by-step

Mounting adhesives play a crucial role in the assembly and installation of membrane switches. They are used to securely attach the switch assembly to the desired surface or enclosure.

Here’s an overview of the process of mounting adhesives on membrane switches:

Surface Preparation

The surface where the membrane switch will be mounted should be clean, dry, and free of any dirt, dust, or grease. This ensures proper adhesion and long-term durability.

If necessary, the surface can be cleaned using isopropyl alcohol or a mild detergent solution.

Adhesive Selection

The appropriate adhesive for mounting the membrane switch depends on various factors, including the substrate material, environmental conditions, and the intended lifespan of the switch.

Common types of adhesives used include pressure-sensitive adhesives (PSAs), acrylic adhesives. The adhesive should be selected based on its compatibility with the switch materials and the surface it will be mounted on.

Adhesive Application

The adhesive is applied to the back of the membrane switch assembly, typically to the spacer layer or the circuit layer.

This is done by using automated processes such as screen printing or roll coating.

Adhesive Cure or Activation

Depending on the type of adhesive used, it may require a curing or activation process to achieve its full bonding strength.

This can involve allowing the adhesive to air dry, applying heat or UV light, or following specific curing instructions provided by the adhesive manufacturer.

Alignment and Placement

Once the adhesive is applied, the membrane switch assembly is carefully aligned and positioned on the desired mounting surface.

Special attention should be given to aligning the embossed areas and switch buttons with the intended locations.

Adhesive Bonding

Firm pressure is applied to ensure proper bonding between the membrane switch assembly and the mounting surface.

This can be done using manual pressure or with the help of rollers or presses, depending on the size and complexity of the switch assembly.

Cure and Adhesion Testing

After the bonding process, it is recommended to allow sufficient time for the adhesive to fully cure or bond according to the manufacturer's instructions.

Adhesion testing can be performed to verify the strength and durability of the bond.

It’s important to follow the adhesive manufacturer’s guidelines and recommendations for proper application, curing, and handling to ensure optimal bonding strength and long-term reliability of the mounted membrane switches.

Please note that the specific adhesive application process may vary depending on the adhesive type, switch design, and manufacturing requirements.

For all matters concerning membrane keyboards, you can trust our design professionals at SKOUPAS.

We supply professionals throughout Attica.