Abstract: Toy aircraft, modular toy aircraft, capacitor-based modular power systems, and toy aircraft kits are disclosed. Toy aircraft may include a self-contained power system and an airframe. The self-contained power system may include at least one propulsion unit operable to propel the toy aircraft and a power unit. The power unit may include a capacitor that is electrically connected to the at least one propulsion unit. The capacitor may be configured to provide power to the at least one propulsion unit to propel the toy aircraft. The airframe may include a wing, a first mount configured to removably retain the at least one propulsion unit, and a second mount configured to removably retain the power unit.

Abstract: Excellent capacitor-voltage characteristics with near-ideal hysteresis are realized in a capacitive-like structure that uses an electrode substrate-type material with a high-k dielectric layer having a thickness of a few-to-several Angstroms capacitance-based SiO2 equivalent (“TOx,Eq”). According to one particular example embodiment, a semiconductor device structure has an electrode substrate-type material having a Germanium-rich surface material. The electrode substrate-type material is processed to provide this particular electrode surface material in a form that is thermodynamically stable with a high-k dielectric material. A dielectric layer is then formed over the electrode surface material with the high-k dielectric material at a surface that faces, lies against and is thermodynamically stable with the electrode surface material.