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:

1. 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.

2. 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.

3. 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.

4. 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

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