Biostimulator header assembly having ceramic helix mount

A header assembly for a leadless biostimulator, comprising:

• a flange include a shoulder and a flange connector, wherein the shoulder has a distal shoulder surface, wherein the shoulder extends around a flange channel disposed on a longitudinal axis, wherein the flange connector extends distally from the distal shoulder surface to a distal flange end along the longitudinal axis and around the flange channel, and wherein the flange connector is a threadless connector having a plurality of mating prongs extending radially from a flange rim;
• and
• a helix mount having a plurality of ceramic portion including a mount body, a mount flange, a mount connector, and a mount boss, wherein the mount body has a proximal mount face apposed to the distal flange end, the mourn flange extends radially outward from the mount body and helically about the longitudinal axis, and wherein the mount connector and the mount boss protrude proximally from the proximal mount face to form an annular channel receiving the flange such that the flange connector is between the mount connector and the mount boss.

A method, comprising:

• mounting, on a flange having a distal flange end and a flange channel extending along a longitudinal axis, a helix mount having a plurality of ceramic portions including a mount body, a mount flange, a mount connector, and a mount boss, wherein the mount body has a proximal mount face apposed to the distal flange end, the mount flange extends radially outward from the mount body and helically around the longitudinal axis, and wherein the mount connector and the mount boss protrude proximally from the proximal mount face to form an annular channel receiving the flange;
• and
• mounting an electrode within a mount bore of the helix mount such that the electrode is disposed within the flange channel and the mount boss is between the flange and the electrode.