Power Electronics
The best of both worlds: the voltage and temperature performance of ceramic, with the reliability, stability, and manufacturability of film.
Request an EvaluationHow It Works
Solid dielectrics face a basic trade-off between dielectric constant and the electric field they can withstand. Caporus avoids that limit with Nanoscale Lamellar Porosity (NLP™) technology.
NLP™ uses porous dielectric structures and controlled electric field distribution to increase breakdown strength. A higher electric field is carried within the nanopores, which enables higher energy density.
The result is a flexible ceramic dielectric, applied as a slurry-based coating on polymer film. No sintering is required.
Focused ion beam cross-section showing the nanoscale lamellar porosity of the NLP™ coating
Products
The NLP™ coating can be applied to non-metallized or metallized film, depending on the capacitor design.
Caporus coated film used with foil electrodes in film-foil capacitor designs.
Used in film-foil capacitors for:
Caporus coating applied to metallized film for metallized film capacitor designs.
Used in capacitors for:
Performance
Caporus’ flexible ceramic dielectrics expand the market beyond the choice between ceramic and polymer film.
Comparison for power electronics applications based on metallized films
| Sintered Ceramic | Polymer Film | Caporus Coating | |
|---|---|---|---|
| Max voltage | 900 V | 1,200 V | 1,200 V |
| Max temperature | 150 °C | 85 °C | 150 °C |
| Capacitance stability | −35% | < 2.5% | < 2.5% |
| Self-clearing | No | Yes | Yes |
| Energy density (relative to film) | 9.7× | 1.0× | 8.6× |
| Roll-to-roll manufacturability | No | Yes | Yes |
Benefits
Designed to fit into existing capacitor production while raising performance.
High dielectric strength in a flexible ceramic for high-voltage, high-temperature operation.
Coated dielectric film designed for existing OEM winding and packaging workflows.
Slurry-based coating avoids sintering and other ceramic process steps, supporting high-volume production.
Self-clearing of defects and robust interfaces for EV, data center, and other high-reliability uses.
Caporus NLP™ prototype capacitor
Higher energy density means a capacitor with the same rating can be made substantially smaller than one built with conventional film.
Applications
High energy delivered in short bursts
Utility grid and power factor correction
Compact, reliable power conversion
High voltage at high temperature
Demanding pulsed power systems
We work with capacitor OEMs and end users on prototype evaluation programs. Tell us about your application.