Conductive Silver Ink Printing Membrane Switch Overlay For WIFI
Telecommunication Device
A membrane switch overlay is a flexible, thin layer that serves as
a user interface for electronic devices. It typically consists of
several key components:
Graphic Layer: This top layer features printed graphics, symbols, and labels
that indicate the function of each button or area. It is usually
made of durable materials such as polyester or polycarbonate.
Spacer Layer: This layer separates the graphic layer from the circuit layer. It
includes adhesive and may have cutouts that allow for tactile
feedback when buttons are pressed.
Circuit Layer: This layer contains the conductive traces that create the
electrical connections. It can be made from materials like silver
or carbon, allowing the switch to register when a button is
pressed.
Adhesive Backing: The entire assembly often has an adhesive backing to facilitate
easy attachment to the device's surface.
Key Features
- Design Flexibility: Membrane switch overlays can be customized in terms of size,
shape, and graphics.
- Water and Dust Resistance: They can be designed to be sealed, protecting the internal
components from moisture and debris.
- Lightweight and Thin: Their low profile makes them ideal for compact devices.
Applications
Membrane switch overlays are commonly used in:
- Consumer electronics (e.g., microwaves, ovens)
- Medical devices
- Industrial equipment
- Automotive controls
Specification:
1)Material (for front or face overlay)
Polyester:
1.Highly versatile for embossing
2.Highly resistant to chemicals
3.Better durability
4.For internal and external use, UV resistance
Polycarbonate:
1.Different surface(Glossy, Matt) and thickness(From 0.12mm~2mm)
2. cost-effective in price
3.For internal and external use
2) Embossing
Rim embossing/pillow embossing/dimple embossing
Graphic overlays can be embossed in order to insert domes/LED,
leave space for mechanical keys/LED and provide tactile indications
and better tactile feeling.
3)Windows(for display function)
1. print different colors windows, As transparent grey/Red/green
window for display
2. Clear/Transparent window for LCD display
2. Matt/semi-transparent window for LED
4)Keys/buttons
Tactile keys---with metal dome or poly dome
Non-tactile--silver printing dots with flat key
5) Embeded LEDs
Small, brilliant lights only about 0.02’’ in height. Avaliable in
several vibrant colors.
LED colors: white, yellow, orange, green, red, or double colors
LED.
6)Cable
It is an extension of the printed circuit and is used to
communicate with your device.
7)Types of connector
1.Zero insertion force (ZIF) connector; 2.Female connector; 3.male
connector
8) EMI / RFI / ESD Shielding
use an aluminum foil shielding / a clear ITO electrical conductive
polyester
9)Adhesive
mostly used are 3M-double-side glue
10)Backplate-
in aluminum, polycarbonate, acrylic, PCB
Product index:
Operating voltage: 35V DC
Operating current: 100mA 1W
Contact resistance: < 100 Ohms
Open circuit resistance: ≥ 10MΩ at 100V
Operating temperature: Flat/Metal dome:-20°c to +80°c
Storage temperature: Flat/Metal dome:-40°cto +80°c
Life expectancy Flat type≥5,000,000 times Tactile type≥1,000,000
times
Switch stroke: 0.1 to 0.6mm
Contact bounce: 5 to 30ms
Actuation force tolerance: +/- 20 to 45g
Tactile ratio: FC > 40%
Operating humidity: up to 95% RH
Female, male connector, solder pins and heat seal connectors are
available
About Taida.pdf
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