How To Custom Silicone Keypad
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- karl
- Issue Time
- Aug 19,2024
Summary
What information you need to know to create a custom silicone rubber button project.
How To Custom Silicone Keypads
When creating a custom silicone rubber keyboard, there are usually a few things to keep in mind for silicone product development to go smoothly.
Molding Options:
Material Versatility:
Customize the keypad's durometer to achieve the desired hardness or softness.
Shape and Size:
Develop keypads in practically any shape and size to fit specific applications.
Color Choices:
A wide array of color options are available to match branding or enhance usability.
1. Flexible Printed Circuit (FPC)
Flexible Printed Circuits are a popular choice for rubber keypads due to their flexibility and reliability. These circuits can be easily manipulated to fit various shapes and spaces, making them ideal for compact devices.
2. Printed Circuit Board (PCB)
Printed Circuit Boards offer a durable and straightforward connection method. PCBs are known for their ability to support complex electronic designs and provide a stable latform for the keypad's functions.
3. Carbon Pill
Embedded within the rubber keypad, carbon pills serve as conductive elements. When pressed, they make contact with the underlying circuit, completing the electronic path. This option is cost-effective and commonly used in simple applications.
4. Membrane Switches
Membrane switches are thin, flexible layers that serve as the connection medium for the rubber keypad. These switches are highly durable and can provide a seal against moisture and contaminants, making them suitable for harsh environments.
5. Silver Ink
Some rubber keypads utilize silver ink circuits printed directly onto the rubber surface. This method combines flexibility with low resistance, offering efficient conductivity.
Actuator Designs
Snap Domes
These actuators provide a crisp tactile response. They're excellent for applications requiring tactile feedback.
Pill Actuators
Known for their durability, these actuators are ideal for devices subject to frequent use.
Co-Molded Actuators
This design incorporates hard plastic into the rubber, offering a balance of firmness and flexibility.
Conductive Rubber Actuators
Embedded with conductive particles, these actuators can ensure reliable electrical contact.
Flex Wall Designs
Standard Flex Walls
These are designed for general usage, providing a balanced tactile response and longevity.
Reinforced Flex Walls
Ideal for robust applications, offering enhanced resistance to wear and tear.
Perforated Flex Walls
This design incorporates tiny holes, enhancing flexibility without compromising structural integrity.
Variable Thickness Flex Walls
Embedded with conductive particles, these actuators can ensure reliable electrical contact.
Design Considerations
Material Selection:
Choosing the right material, such as silicone rubber, ensures durability and optimal usability.
Customization:
Each design can be further customized with colors, shapes, and surface textures to meet specific application needs.
Environmental Considerations:
For outdoor or harsh environments, incorporating weather-resistant materials and designs can extend the keypad's lifecycle.
In summary, rubber keypads are highly adaptable to different environmental conditions due to their robust sealing, durable materials, protective coatings, effective seal frames, and specialized adhesives. Whether facing moisture, temperature extremes, UV exposure, or chemical interference, these silicone keypads provide reliable performance.