Electrets TRIZ Cases

Composite oxide electrets with a 3 eV+ band gap hold high surface potential up to 200°C, overcoming polymer thermal instability.

Strain-engineered ferroelectric thin films use dense in-plane superdomains to suppress depolarization hysteresis and raise tunable dielectric response.

A halogen-containing perfluoroelastomer electret solves the tradeoff between charge retention and elasticity in stretchable skin-patch harvesters.

A halogen-containing perfluoroelastomer electret enables a flexible skin patch that retains charge and harvests power from electrode gap changes.

An exposed electret surface collects charge without vibration, enabling simpler power generation from residual polarization.

Residual polarization in an inorganic electret enables power generation without vibration while simplifying electrode structure and charge collection.

Tubular insulating spacers and vertical contact vias replace stepped connections in deep trench capacitors to save area while maintaining capacitance.

Laterally insulated contact vias remove stepped electrode surfaces, shrinking deep trench capacitor area while preserving high capacitance.

A composite metal electret layer with bandgap ≥4 eV retains surface potential at high temperature while avoiding substrate and wiring damage.

Inorganic dielectric particles in a polarised base film give electrets controllable thickness and stable surface potential at high temperature.

Electrostatic grounded screen isolates measurement channel from external electric fields.