Implantable medical devices with header structures including conductive paths that facilitate the interconnection of feedthrough conductors to electrical connectors

A method of constructing an implantable medical device, comprising:

• providing a header body having a first cavity exposed on a first side of the header body, having a second cavity exposed on a second side of the header body, and having at least one hole extending from the first side to the second side, the first cavity being laterally spaced from the second cavity;
• providing a first stack assembly within the first cavity, the first stack assembly comprising at least one electrical connector and a lead frame conductor electrically connected to the at least one electrical connector;
• providing a housing that houses electrical circuitry, the electrical circuitry comprising feedthrough conductors that exit from the housing;
• inserting a conductive pin into the hole;
• establishing an electrical connection between the lead frame conductor of the first side and a first end of the conductive pin present on the first side;
• mounting the header body to the housing;
• establishing an electrical connection of a first feedthrough conductor to a second end of the conductive pin present on the second side.