Figure 11.

RUS-LPMv2, 994 days. (a) An electrode tip completely covered in a thick layer of fibrosis, scale 20 μm. (b) Another electrode showing platinum peeling off of underlying silicon. Encapsulation tissue is intermingled with platinum fragments and there are linear defects in the platinum. These findings may be due to mechanical shearing as the array was removed from the brain, scale 10 μm. (c) An electrode with thick encapsulation tissue adherent to platinum that has separated from the silicon, scale 2 μm. (d) Side view of the array showing thick encapsulation tissue, inter-electrode fibrosis, elastic collagen fibers, and cracked parylene, scale 100 μm. (e) Thick tangle of elastic collagen fibers between electrodes in the center of the array, scale 100 μm. (f) Separation between the silicone elastomer of the wire bundle and the parylene at the edge of the array, scale 100 μm. All images in this figure were taken at 1 kV.