standard-domes PCB pad design

Triangle Oval  Round  Four-legged domes can be mounted to a wide variety of switching surfaces, including single or double-sided printed circuit boards, flex circuits, and membrane switch panels.

This drawing represents one of many possible layouts，customer will be responsible for final design of P.C.B. layout.dome switches designed to meet the unique requirements of circuit board applications. To successfully design dome switches for your applications, you must understand the intricacies of plating, venting, and actuator solutions for metal dome switches. These are all essential for ensuring reliable electrical connections and efficient functionality in your electronic devices. Whether you are an engineer, designer, or manufacturer, we can guide you through your next project’s unique plating, venting, and actuator requirements.

Venting

In circuit design, the movement of air is called “venting” and is important so that the dome switch functions properly. Lack of venting can cause adverse effects on the feel and function of the switch. While venting is not absolutely necessary for every application, it is desirable in almost all applications.When the dome is depressed, the air is trapped underneath it. To avoid compressing the air under the dome when actuated, it is recommended that a vent channel be present. The venting of the dome can be achieved in a number of different ways.The vent channel can go from dome to dome via a spacer layer.

Dome arrays can be top vented through the polyester material.

The vent channel can go through the board. Not properly venting the dome will result in a significant loss of tactile response.

Single-sided PCB with via hole

Double-sided PCB with via hole