Neural Probes · A-Series (Polytrode & Tetrode)
8-Shank 256-Channel Probe, 7.5 mm
Sites clustered rather than spread — polytrode and tetrode groups a sorter can separate
Eight long shanks side by side, spread for lateral coverage across columns, 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), 7.5 mm shanks (64th percentile of the 366 measured), a 0.4 mm-deep site array (26th percentile), 275 sites/mm² (54th percentile) and a 1.27 mm³ neural interface (79th 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 long shanks reach deep targets.
Orders as a probe-plus-package assembly, in 5 package configurations. Silicon 50 µm thick. Z-coat not available on this close-spaced poly layout. Research use only.
SKU prb_ahc--a8x32_poly2_7p5mm_25s_325_177 · Neural Probes in the webstore
Specifications
| Channels | 256 |
|---|---|
| Shanks | 8 |
| Shank length | 7.5 mm |
| Shank separation | 325 µm |
| Site layout | Poly2 |
| Site area | 177 µm² |
| Site pitch | 12 µm |
| Vertical span | 402 µm |
|---|---|
| Substrate | Silicon |
| Site material | Iridium |
| Thickness | 50 µm |
| Neural interface volume | 1.269 mm³ (higher than 79% of 371 designs) |
| Site coverage density | 275.2 sites/mm² (higher than 54% of 371 designs) |
| Brain coverage density | 201.8 sites/mm³ (higher than 97% of 371 designs) |