Led Custom Membrane Switch Graphic Overlay Membrane keyboard

Product Feature

Overlay Color: Pantone or RAL-color Number
Button Color: Customized
Button Option: Flat or Emboss
Emboss Type: Pillow/Dome/Border Emboss
Dome Type: Mylar/Poly Dome, Metal Dome
Material: PET(polyester)/PC(polycarbonate)
Material Brand: Autotex/Toyobo/F150/F200/XEF150/XEF200/Customized
Surface Finish: Glossy or Matte
Thickness: 0.7~1.5 mm/Customized
LED Color: White/Green/Red/Customized
OEM Artwork/Drawings Format: Corel Draw, Adobe Illustrator AI, AutoCAD
Tail/Pin/Circuit Layout: Based on customers detailed requests
Antistatic Shielding: Can be added For Protection
Connector: Female/Male Connectors or ZIF Connector
Rear Adhesive: 3M467, 3M468, 3M9080 etc…
Cables: Extension of Circuit and Connect with your Device
Printing Method: Silk Screen Printing/Digital printing
Windows/Lens Coating: Can be added
CertificateI: SO9001 RoHS CE SGS REACH PAHS

Product Details

The structure and working principle of membrane switch

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.

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.

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.

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.

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.

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.

Product Parameter

Electrical Properties
Rated Voltage	≤ 50V DC
Rated Current	≤ 100mA
Operating Power	≤ 1W
Insulation Resistance	≥ 100MΩ (250V DC)
Loop Resistance	10Ω ~ 2kΩ (based on the design)
Contact Resistance	0.5 ~ 5Ω
Wire Lead Resistance	< 1Ω/cm
Base Material Voltage Withstand	1500V DC
Mechanical Properties
Life Expectancy	Flat type ≥ 5 million times, Tactile type ≥ 1 million times
Operation Force	Flat Type 57-284g, Tactile Type 170-397g
Dome Rebound Time	≤ 6ms
Tail Bending Performance	≤ 180°
Switch Stroke	Flat 0.1~0.5mm, Tactile 0.6~1.5mm
Vibration	20G' s max
Thickness	0.7~1.5 mm
Environmental Properties
Operation Temperature	-40°C to +80°C (-40°C to 176°F)
Storage Temperature	-40°C to +85°C (-40°C to 185°F)
Atmospheric Pressure	86 ~ 106 kPa
Humidity	+40°C, 90% ~ 95% RH for 240 Hours

Product Application

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.

New LED custom membrane switch graphic overlay membrane keyboard