Colorful polyester overlay conductive circuit fpc film switch embed LED membrane keyboard

What is Membrane Switch?

The membrane switch is a momentary switching device that is manufactured by using a series of flexible layers of polymer films and adhesives. The top layer, called a graphic overlay, is manufactured by printing on the down surface of transparent polyester or polycarbonate film. Membrane switches can be constructed of multiple circuit layers, and more optimized graphic design features, such as domed key embossing. Designs that are more complex require more material layers for proper construction and reliable operation. Membrane switches, when combined with components such as a tactile dome, graphic overlay, or integrated LEDs or resistors can provide the designer with virtually limitless capabilities to create the ideal custom user interface for their products.

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Basic Properties .

The Structure and Working Principle of Membrane Switch.

1.Graphic Overlay – PET/PC is usually the material of choice due to its fantastic chemical resistance and flex property . UNIGREAT can do digital printing, screen-printing, or apply both methods to ensure you get the right colors, textures and finish your design requirements.

2.Overlay Adhesive – This adhesive layer stick the graphic overlay to the top circuit layer, and is usually an acrylic adhesive. The material is same with the fourth layer. Only the thickness maybe different according to the actual situation.

3.Top Circuit Layer – The material of this layer is specific. Is is a 0.1mm thickness thermostable PET film printed with conductive silver ink and also dielectric oil, which used for fastening metal domes.

4.Circuit Spacer – This layer separates the top circuit from the bottom circuit so that switch remains normally break until the keypad is pressed. The circuit spacer is a polyester spacer with adhesive on both sides.

5.Lower Circuit Layer – This layer is a 0.1mm--0.25mm thickness thermostable PET film printed with conductive silver ink and also dielectric oil. This layer terminates as a flexible tail that serves as an interconnector to controller PCBs or other IC.

6.Rear Adhesive – This adhesive layer bonds the entire membrane switch to the product surface, housing, or to a rigid support panel. UNIGREAT can use the proper adhesive type and thickness to bond your membrane switch to your equipment.

Colorful polyester overlay conductive circuit fpc film switch embed LED membrane keyboard ; Colorful polyester overlay conductive circuit fpc film switch embed LED membrane keyboard 

Production Process.

Quality Control.

Membrane switch because of its fantastic Electrical Properties, Mechanical Properties and Environmental Properties, it is widely used in Smart Home Appliances, Office Equipment, Medical Equipment, Automobile and Industrial Equipment.

Packaging: Normally a certain amount of products into poly bag, then packed into carton. Or customized packed.

Shipping: Via Air Express like DHL UPS FedEx TNT, or Via Sea shipping.

Our Advantages:

1.We are a factory with total about 488 staff, 200 thousands square meter. Throughout production process our quality is strictly being controlled with detailed record. All of our machines were upgraded ONE year ago and brand new.

2.With more than 18 years experiences of 10 Designers and 18 Engineers, so customized product service is No problem, we can offer you the best solutions.

3.You will get fairly competitive prices with fantastic quality products. Also the packaging, delivery time and after-sales services are guaranteed, we have a powerful and professional team.

UNIGREAT was founded in 2001 in Shenzhen Nanshan Xili Town, formerly known as Jia Yi Da Hardware Plastic Factory. In 2004 we moved to Shenzhen Bao’an Shiyan Shilongzai for expanding the scale, now we own UNIGREAT industrial park over 200 thousands square meter. Since then we bought many machines , such as big plastic injection machines, large CNC machines, electrical discharge machines, and wire-electrode cutting machines.

Meanwhile, the Membrane Switch Department/ Decoration Panel Department/ IMD Department were established, together with Mould Department and Injection Department now we have 5 Departments, total staff more than 488 people. Also we purchased more important machines like Automatic screen-printing machines, Infrared Drying machines, Automatic cutting machines, and Automatic Laser Cutting Machines.

With more than 18 years serving The world's top 500 companies like Midea, Gree Flextronics, Haier, LG, Samsung and Galanz, we are qualified to serve oversea customers and brands. Choose to cooperate with us, you will have totally fresh and fantastic experiences.

Since 2001, UNIGREAT has designed and manufactured the best quality, OEM/ODM Membrane Switch, Graphic Overlay, Precision Plastic Mould and Plastic Injection Parts, and then custom all kinds of Membrane Switch, Graphic Overlay, IMD Plastic Injection Parts, Plastic Injection Parts and High Precision Plastic Mould. All of the above products are engineered and manufactured in our own UNIGREAT industrial park which over 200 thousands square meter located in Shenzhen, China.

Colorful polyester overlay conductive circuit fpc film switch embed LED membrane keyboard