Housings for implantable medical devices and methods for forming housings

An implantable medical device, comprising:

• (a) a metal housing comprising:
• (i) a first portion having a base and one or more sidewalls wherein the base and sidewalls each have an interior surface and an exterior surface and wherein the interior surfaces of the base and sidewalls define a cavity;
• (ii) a second portion configured to enclose the cavity defined by the first portion when the housing is assembled;
• (iii) one or more structural elements extending from and integrally molded with the interior surface of the first or second portions of the housing, wherein the one or more structural elements are disposed within the cavity, wherein one or more of the structural elements is selected from the group consisting of a block, an aperture, a notch and an indentation;
• and
• (b) an electronic package configured to be disposed within the housing.

A method of making an implantable medical device, the method comprising:

• (a) preparing a mold defining first and second portions of a housing, the housing comprising:
• (i) the first portion having a base and one or more sidewalls wherein the base and sidewalls each having an interior surface and an exterior surface and wherein the interior surfaces of the base and sidewalls define a cavity;
• (ii) the second portion configured to enclose the cavity defined by the first portion when the housing is assembled;
• (iii) one or more structural elements extending from and integrally molded with the interior surface of the first or second portions of the housing, wherein the one or more structural elements are configured to reinforce the structural integrity of the housing;
• and
• (b) molding the first and second portions with a molten metal alloy, and
• (c) enclosing an electronic package within the housing.