Conductive Printing Ink With Different Designs and Sizes

Introduction:

Conductive Priting Ink rubber keyboards facilitate electrical conduction through specialized rubber adhesives. When a key is pressed, establishing contact with the PCB, electrical conductivity is enabled; upon release, conductivity ceases. Widely employed in remote controllers and diverse switch applications, conductive silicone rubber keypads offer versatile functionality.

 Silicone Rubber Keypad Design Essentials:

1. Key Travel Distance
2. Button Pads
3. Conductive Elements: Carbon Pills, Graphite Pads, etc.
4. Button Structure
5. Flexible Webbing

 Notes: Silicone keypad designers and manufacturers must consider factors such as key travel distance, button pads, conductive elements, button structure, and flexible webbing, along with other considerations like surface demands, protective covers, material choice, transparency, hardness, and coating options.

 Conductive Ink Printing Overview:

Conductive inks are designed to promote electrical conductivity, often using materials such as graphite. It provides an economical approach to modern conductive traces because it is applied through a purely additive printing process, minimizing waste streams. However, the resistivity of graphite can be too high for many PCB applications, and its non-rigidity can create unwanted forces on component interconnects, leading to reliability issues. Therefore, while useful in some applications, these limitations limit its use to specific scenarios.

 Carbon Pills Overview:

Black carbon pills are crafted from a silicone-based conductive material infused with carbon, enabling electrical conduction. These pills are strategically molded into the key actuators, forming a crucial connection with the circuit upon contact. During the final molding process, they are securely affixed to the keypad’s underside at designated switch points. This attachment method mirrors the precision of insert molding, commonly employed for molding electrical connector terminals.