Production method for built-in capacitive sensor at low cost

Data di pubblicazione




Data di prioritĂ 



Politecnico di Milano


Department of Electronics, Information and Bioengineering


Bonarini Andrea, Brivio Andrea, Merigo Martina, Rogacheva Ksenia, Romero Maximiliano, Zambelli Marta


The invention consist in a capacitive sensor and its process production. This capacitive sensor is basically a pad made in elastomer, a soft/fluffy and customizable material able to get a front-end function (esthetic/functionalized). Inside in the pad there is an interaction revelation system, able to process the interaction between a hand and the pad by an electromagnetic signal, interpreted by a microcontroller. The revealed signal indicates when and how the hand interact with the pad (to move close, to distance, to touch, to push, ...). In the inside of the same object can be putted in many pads, to guarantee an interaction between them without mechanical buttons. This permits, in the products with one or multiple pads, to have a great input dynamics.

Campo di applicazione

The sensor can be easily used in any fluffy or soft object and/or made in tissue. Exemplificative possible application are plush/Muppet/toys, tech-chairs, tech-beds, tech-sofas...


The characteristics of this technology provides both economical advantaged as low productive and tech-costs sensors and at design level. Although it is possible to have an own pleasant design, with no need to hide or camouflage it. Differently from metal foil sensors, that are structurally rigid, there is the possibility to apply this capacitive sensor also in soft structures (as Muppets) with a simple hardware, not fragile and not expensive, in other words there aren’t structural limits. At least there is the possibility to get different levels of interactions, considering multiple actions and the potential combination with multiple pads guarantying a high dynamic input.