Snaptron Blog - Archive for July, 2013

Most Common Way of Securing Tactile Domes to your PCB

Snaptron offers Peel-N-Place arrays which is the most common way to secure tactile domes to your PCB or flex circuit.  Typically, metal domes are not meant to be soldered.  When a dome is actuated, the center of the dome collapses making contact at the center.  As this happens, the legs of the dome flex out. […]

Choosing Tactile Dome PCB Board Plating

When evaluating the type of PCB pad plating you will need with tactile dome contacts, it is important to ask yourself two questions: 1. What is the product life cycle requirement? 2. What type of contact resistance do I require? The circuit pad base is often copper, which will oxidize if not plated. Nickel has […]

Analyzing a Force Displacement Curve of a Tactile Dome

A force displacement curve is a good way to visually look at the mechanical function of a switch. The curve primarily shows two things – (1) the amount of force needed to actuate a switch from its open position to closed position, and (2) the amount of travel the switch undergoes from the open position […]

Choose Your Circuit Plating Wisely

When choosing your plating, keep in mind that each time a tactile dome is pressed that the legs or outer perimeter of the dome flexes. This can rub on the circuit and cause deterioration of the circuit pad over time. Both nickel and gold plating are options, but the type of plating depends on the […]

Placing Metal Domes in Membranes Can be Tricky

Placing metal domes quickly and accurately in membrane applications can be tricky. Typically, domes arrive in bulk form and are packaged in jars. Getting domes placed quickly can be challenging and “double doming” common. At Snaptron, we have invented a proprietary technology that allows for fast placement and assures only one dome is placed in […]

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