Patent ID: 7187974

Claim:
A device, comprising: a thermoplastic connector module configured to couple to an implantable medical device; a first cavity formed in the thermoplastic connector module of an implantable medical device, said first cavity defining a surface opening in the thermoplastic connector module and said surface opening having a geometric periphery; a pierceable resilient member disposed in the first cavity; and a perforated thermoplastic lid ultrasonically welded to the geometric periphery of the surface opening and abutting the pierceable resilient member so that said pierceable resilient member is compressed; and one of a flash-reducing feature and an energy director structure located intermediate a portion of the lid and an opposing portion of the surface opening and further comprising a header module having a major connector port formed therein; wherein the first cavity comprises a minor port formed in the header module and said first cavity is aligned with a longitudinal axis of the major connector port and wherein the major connector port is configured to receive a proximal end of a medical electrical lead.