A PPTC device is provided. The PPTC device may include a first electrode and a second electrode, disposed opposite the first electrode. The PPTC device may include a PPTC layer, disposed between the first electrode and the second electrode, the PPTC layer comprising a polymer matrix formed from a thermoplastic polyurethane (TPU) material.

The invention relates to a switch including a switch housing, a contact system and a base disposed in the switch housing, a resistive element for diagnosing a state of a switch, and at least two terminals leading from the base. The resistive element has a specific resistance value. The resistive element is a conductive material formed on the base, the terminals being electrically connected by the conductive material.

An example method includes: (i) depositing an insulating layer on a substrate; (ii) forming a conductive polymer layer on the insulating layer; and (iii) repeating deposition of a respective insulating layer, and formation of a respective conductive polymer layer to form a multilayer stack of respective conductive polymer layers interposed between respective insulating layers. Each respective conductive polymer layer has a respective electrical resistance, such that when the respective conductive polymer layers are connected in parallel to a power source, a resultant electrical resistance of the respective conductive polymer layers is less than each respective electrical resistance.

An example method includes: (i) depositing an insulating layer on a substrate; (ii) forming a conductive polymer layer on the insulating layer; and (iii) repeating deposition of a respective insulating layer, and formation of a respective conductive polymer layer to form a multilayer stack of respective conductive polymer layers interposed between respective insulating layers. Each respective conductive polymer layer has a respective electrical resistance, such that when the respective conductive polymer layers are connected in parallel to a power source, a resultant electrical resistance of the respective conductive polymer layers is less than each respective electrical resistance.

A force sensitive resistor includes first and second electrical contacts, and a layer of deformable material impregnated with carbon nanotubes. The layer of deformable material is arranged between the first and second electrical contacts. A difference in the conductivity of the impregnated material caused by deformation of the material is detectable across the contacts. A method of manufacturing a force sensitive resistor includes the steps of providing first and second electrical contacts, and arranging a deformable material impregnated with carbon nanotubes between the first and second electrical contacts. Again, a difference in the conductivity of the impregnated material caused by deformation of the material is detectable across the contacts

An example method includes: (i) depositing an insulating layer on a substrate; (ii) forming a conductive polymer layer on the insulating layer; and (iii) repeating deposition of a respective insulating layer, and formation of a respective conductive polymer layer to form a multilayer stack of respective conductive polymer layers interposed between respective insulating layers. Each respective conductive polymer layer has a respective electrical resistance, such that when the respective conductive polymer layers are connected in parallel to a power source, a resultant electrical resistance of the respective conductive polymer layers is less than each respective electrical resistance.

There is provided a temperature sensor element including a pair of electrodes and a temperature-sensitive film disposed in contact with the pair of electrodes, in which the temperature-sensitive film includes a matrix resin and a plurality of conductive domains contained in the matrix resin, the conductive domains include a conjugated polymer and a dopant, and the number of structural units constituting the conjugated polymer is 65 or less.

The invention is directed to a polyimide-based polymer thick film paste composition for forming a polyimide-based polymer thick film resistor, a process for forming the resistor and an electrical device containing a resistor formed using the paste composition The paste composition comprise a functional component, a polyimide, and an organic solvent and can be cured by heating.

An example method includes: (i) depositing an insulating layer on a substrate; (ii) forming a conductive polymer layer on the insulating layer; and (iii) repeating deposition of a respective insulating layer, and formation of a respective conductive polymer layer to form a multilayer stack of respective conductive polymer layers interposed between respective insulating layers. Each respective conductive polymer layer has a respective electrical resistance, such that when the respective conductive polymer layers are connected in parallel to a power source, a resultant electrical resistance of the respective conductive polymer layers is less than each respective electrical resistance.

The invention is directed to a polyimide-based polymer thick film paste composition for forming a polyimide-based polymer thick film resistor, a process for forming the resistor and an electrical device containing a resistor formed using the paste composition The paste composition comprise a functional component, a polyimide, and an organic solvent and can be cured by heating.