Patent ID: 8860048

Claim:
An LED lighting assembly comprising: i. a flexible top conductive layer comprising a first conductive metal, the flexible top conductive layer having a thickness from 4 to 100 microns; ii. a flexible bottom heat sink layer comprising a second conductive metal and the flexible bottom heat sink layer having a thickness of at least 10 microns; iii. a flexible dielectric middle layer comprising a polymer, the flexible dielectric middle layer having a thickness from 4 to 100 microns and providing electrical insulation between the flexible top conductive layer and the flexible bottom heat sink layer; the first conductive metal of the flexible top conductive layer being the same or different from the second conductive metal of the flexible bottom heat sink layer; said LED lighting assembly comprising a notch and having a longitudinal axis and a plurality of defined positions spaced along the longitudinal axis, and being bendable at least 10 degrees proximate at least one of the plurality of defined positions spaced along the longitudinal axis or being twisted relative to the longitudinal axis; wherein at least 50 weight percent of the flexible dielectric middle layer is a polyimide derived from at least 30 mole percent aromatic dianhydride based upon total dianhydride content of the polyimide and at least 30 mole percent aromatic diamine based upon total diamine content of the polyimide, and wherein at least a portion of the plurality of defined positions comprise an LED and wherein the LED is in electrical communication with a circuit.