Customizable Surface Mount Custom Membrane Keypad For Hairfoil Device
Components of a Membrane Keypad
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Top Layer:
- Printed graphics or symbols.
- Can be made of various materials for durability and aesthetics.
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Spacer Layer:
- A non-conductive layer that separates the top and bottom layers.
- Contains holes for the keys to collapse upon pressing.
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Bottom Layer:
- Contains conductive traces that complete the circuit when a key is pressed.
Design Considerations
- Size and Shape: Tailor the dimensions and layout to fit your application.
- Key Functions: Decide on the number and type of keys (momentary, toggle, etc.).
- Material Selection: Choose materials based on environmental exposure (e.g., moisture, dust).
- Graphics and Text: Consider readability and usability for end-users.
- Backlighting: Optional feature for visibility in low-light conditions.
Applications
- Consumer electronics (like remote controls)
- Industrial equipment
- Medical devices
- Automotive controls
Customization Options
- Color and Finish: Various colors and textures can be used.
- Key Shapes: Different shapes for different functions or user preferences.
- Adhesive Backing: For easy installation on surfaces.
Manufacturing Process
- Prototyping: Create initial designs using CAD software.
- Testing: Evaluate the keypad for durability and functionality.
- Production: Mass production can be initiated once the design is finalized.
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
Common Membrane switch structure
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