Screen Printing Custom Membrane Keyboard Silver Conductive Circuit
With 1.25MM Pitch
Creating a custom membrane keyboard involves several steps, from
selecting components to assembly and programming. Here’s a general
guide to help you through the process:
1. Select Components
- Membrane Switches: Choose the type of membrane switches you want (tactile,
non-tactile, etc.).
- PCB (Printed Circuit Board): You may need a custom PCB or a pre-made one that fits your design.
- Microcontroller: Select a microcontroller that can interface with your switches
(e.g., ATmega32u4 for USB).
- Keycap Design: Decide on the keycap style, shape, and material.
2. Design the Layout
- Use software like KiCad or Eagle to create a schematic and design
the layout for your PCB.
- Plan the arrangement of keys based on your usage needs (QWERTY,
Dvorak, etc.).
3. Fabricate the PCB
- Once your design is complete, send it to a PCB manufacturer for
fabrication.
4. Create the Membrane Layer
- You could either purchase a pre-made membrane or have one custom
made. This layer should align with the switches and PCB.
5. Assemble the Keyboard
- Mount the switches onto the PCB.
- Attach the membrane layer ensuring it aligns correctly with the switches.
- Connect the microcontroller to the switches and PCB.
6. Programming
- Use firmware like QMK or TMK to program your keyboard. This allows
you to customize key functions, macros, and backlighting.
7. Testing
- Test each key for functionality and make sure everything works as
intended.
- Debug any issues that arise during testing.
8. Finalize and Encase
- Once everything is working, you can encase your keyboard in a
housing of your choice, adding aesthetics and protection.
Additional Considerations
- Backlighting: If you want backlighting, ensure your design supports it.
- Ergonomics: Consider the height and angle for optimal typing comfort.
- Customization: Think about custom keycap designs or printed graphics on the
membrane.
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
About Taida.pdf
Product index:
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 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
Operating humidity: up to 95% RH
Female, male connector, solder pins and heat seal connectors are
available
More photos show :
Application:
FAQ:
