A multi-channel neuromodulation electrode assembly has multiple electrodes arranged in a non-linear, non-planar fashion by stacking electrode elements to form an electrode stack. Multiple electrode stacks may be combined to produce electrode shanks, and multiple electrode shanks may be combined to produce electrode arrays. This provides an easily customizable non-linear and non-planar channel arrangement. Complex electrode configurations can be assembled from multiple electrode elements. Depending on the requirements, the number of channels, the channel spacing, the complexity of assembly differs. In one embodiment, referred to as a 'Christmas tree' configuration, the electrode has two stacks facing opposite directions. In another embodiment, referred to as an 'Empire State Building' configuration, the electrode has four stacks facing different directions. In yet another embodiment, the electrode has eight stacks facing different directions. In yet another embodiment, the electrode has eight shanks by eight shanks, where each shank has 14 channels. In yet another embodiment, the electrode has three shanks by three shanks, where each shank has 9 channels.
NON-PLANAR MULTI-CHANNEL ELECTRODE ARRAY