Definition: Membrane switches are a type of electronic switch that is made up of multiple layers, including a flexible membrane, printed graphics, and electrical contacts.
Functionality: They are used to control devices by completing a circuit when a button is pressed. Common in appliances, medical devices, and consumer electronics.
Advantages:
- Durability: Resistant to dust, moisture, and contaminants.
- Low Profile: Offers a sleek design that can be customized for various applications.
- Easy to Clean: The flat surface is easy to wipe down, making it hygienic for medical applications.

Graphic Overlays

Definition: Graphic overlays are the printed layers that cover and protect the underlying circuitry of the membrane switch. They often include graphical elements like icons, labels, and branding.
Design Considerations:
- Material: Typically made from polyester or polycarbonate, providing durability and clarity.
- Printing Techniques: Common techniques include screen printing, digital printing, and UV printing.
- Finish: Options include matte, gloss, or textured finishes to enhance visibility and tactile feedback.
Customization: Graphic overlays can be tailored in terms of color, shape, size, and functionality to match specific device requirements.

Applications

Industries: Commonly used in medical devices, automotive controls, consumer electronics, and industrial equipment.
User Experience: Enhances usability by providing clear visual cues and tactile feedback for users.

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.