Implantable medical device conductor insulation and process for forming

摘要

A composite redundant insulation is formed about each of a plurality of conductors extending within a lead body of an implantable medical device. The insulation includes a first insulative layer, a second insulative layer having a lower durometer and a lower flexural modulus than the first insulative layer, and a third insulative layer having a higher durometer and a higher flexural modulus than the second insulative layer.