Solid Electrolytic Capacitor Anode with Reduced Crystallinity Dielectric

The patent applies periodic action by using a formation profile that cycles between increasing and decreasing current phases. The current is increased to a peak value, held, then decreased to a valley, and this cycle repeats multiple times. This periodic variation allows the dielectric layer to form progressively while preventing overheating by reducing current during peak temperature periods, thus avoiding dielectric cracking and excessive leakage current.

The patent changes the current parameter dynamically during the formation process. Instead of using a static or simply decreasing current, the current is varied through multiple cycles of increase and decrease, with specific peak and valley values. This parameter change strategy enables controlled dielectric formation at high voltage while managing thermal effects that would otherwise cause cracking and leakage.

The periodic formation profile resolves this contradiction by alternating between high current peaks (which provide rapid dielectric growth for high productivity) and low current valleys (which allow thermal management and maintain dielectric quality). The multiple cycles enable the dielectric to form quickly while preventing defects, achieving both high speed and high quality.

The formation profile incorporates beforehand cushioning by including hold periods at peak current and extended periods at valley current before proceeding to the next cycle. These cushioning periods allow the dielectric layer to stabilize and prevent thermal runaway, ensuring quality is maintained even during rapid formation processes.