Multilayer polymer dielectric film

A multilayer dielectric film comprising:

• a stack of coextruded, alternating first dielectric layers, second dielectric layers, and tie layers interposed between the first and second dielectric layers, the stack receiving and storing an electrical charge;
• the first dielectric layers comprising a first polymer material, the second dielectric layers comprising a second polymer material, the tie layers comprising a third polymer material;
• the first dielectric layers and the tie layers defining first interfaces between the layers and the second dielectric layers and tie layers defining second interfaces between the layers such that the multilayer polymer dielectric film exhibits at least one of a higher breakdown strength and a higher energy density than the breakdown strength and energy density of the first and second dielectric layers.

A capacitor comprising:

• a stack of coextruded, alternating first dielectric layers, second dielectric layers, and tie layers interposed between the first and second dielectric layers, the stack receiving and storing an electrical charge;
• the first dielectric layers comprising a first polymer material, the second dielectric layers comprising a second polymer material, the tie layers comprising a third polymer material;
• the first dielectric layers and the tie layers defining first interfaces between the layers and the second dielectric layers and tie layers defining second interfaces between the layers such that the stack exhibits at least one of a higher breakdown strength and a higher energy density than the breakdown strength and energy density of the first and second dielectric layers.