Neural Probes · A-Series (Polytrode & Tetrode)
8-Shank 256-Channel Probe, 6 mm
Sites clustered rather than spread — polytrode and tetrode groups a sorter can separate
Eight mid-length shanks side by side, closely spaced for coverage within one structure, with sites staggered in two columns so neighbouring sites see the same units. Among the 371 probe designs in the design space it is mid-range: 256 sites (99th percentile), 6 mm shanks (60th percentile of the 366 measured), a 0.48 mm-deep site array (27th percentile), 373 sites/mm² (61st percentile) and a 0.95 mm³ neural interface (68th percentile).
Small sites read a local patch at higher impedance, sharpening single-unit isolation, packed densely enough to track a unit across neighbouring sites. The mid-length shanks reach structures a few millimetres down.
Orders as a probe-plus-package assembly, in 5 package configurations. Silicon 15 µm thick. Z-coat available. Research use only.
SKU prb_ahc--a8x32_poly2_6mm_30s_200_121 · Neural Probes in the webstore
Specifications
| Channels | 256 |
|---|---|
| Shanks | 8 |
| Shank length | 6 mm |
| Shank separation | 200 µm |
| Site layout | Poly2 |
| Site area | 121 µm² |
| Site pitch | 15 µm |
| Vertical span | 477 µm |
|---|---|
| Substrate | Silicon |
| Site material | Iridium |
| Thickness | 15 µm |
| Neural interface volume | 0.947 mm³ (higher than 68% of 371 designs) |
| Site coverage density | 372.9 sites/mm² (higher than 61% of 371 designs) |
| Brain coverage density | 270.3 sites/mm³ (higher than 99% of 371 designs) |