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. 2017 Oct 19;17(10):2388. doi: 10.3390/s17102388

Figure 1.

Figure 1

(a) Schematic of implanted probe reaching multiple areas inside a rat brain; (b) neural probe with shank wiring bottleneck limiting the number of electrodes; (c) typical CMOS (complementary metal-oxide-semiconductor) back end-of-line cross section, with six metal layers.