Panasonic has recently introduced an SMD push-button switch named “Light Touch Switch”, which is the thinnest of its kind currently on the market with a thickness of only 0.53mm.
The device features a very small footprint of only 2.6x1.6mm and it is designed for use in wearable devices (smart watches, wristbands, etc.), hearable devices (headphones, hearing aids, etc.), as well as healthcare devices (portable medical devices, etc.). Benefiting from a very light operating force of only 1.6N but still giving a clear tactile feedback, the switch is water-resistant and dust-proof (compliant with IP67 level specifications) making it ideal for use both in indoor and outdoor applications.
Mass production will start in August 2017 (more info).