Manufacturing implantable tissue stimulators

A method of manufacturing a device, the method comprising:

• adding one or more electrodes to a circuit board, the circuit board comprising an antenna and circuit components;
• adhering the one or more electrodes to be fixed relative to the circuit board;
• applying an insulation material to the circuit board such that the insulation material forms a housing that surrounds the circuit board, the circuit components, and the antenna, while preventing encapsulation of the one or more electrodes by the insulation material;
• and
• adding one or more contact joints at contact pad locations of the circuit board,
• wherein the adding one or more electrodes to a circuit board further comprises:
• adding the electrodes after the contact joints have been added to the circuit board,
• wherein the applying the insulation material is a double injection process,
• wherein the applying the insulation material further comprises:
• placing the circuit board with the one or more electrodes into a first mold;
• flowing, into the first mold, the insulation material around at least the circuit board at locations relative to the antenna and the circuit components and between the electrodes, the first mold having at least one cavity having a first portion with a round cross-section and at least a second portion with a semi-round cross-section;
• removing the circuit board with the one or more electrodes from the first mold;
• changing the first mold to a second mold;
• and
• flowing the insulation material into the second mold, the second mold having at least one cavity having a round cross-section.