Neural Probes · A-Series (Polytrode & Tetrode)
4-Shank 256-Channel Probe, 5 mm
Sites clustered rather than spread — polytrode and tetrode groups a sorter can separate
Four 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), 5 mm shanks (a common choice — 107 of 363), a 1.46 mm-deep site array (65th percentile), 220 sites/mm² (49th percentile) and a 1.27 mm³ neural interface (80th 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 not available on this close-spaced poly layout. Research use only.
SKU prb_ahc--a4x64_poly2_5mm_23s_250_177 · Neural Probes in the webstore
Specifications
| Channels | 256 |
|---|---|
| Shanks | 4 |
| Shank length | 5 mm |
| Shank separation | 250 µm |
| Site layout | Poly2 |
| Site area | 177 µm² |
| Site pitch | 23 µm |
| Vertical span | 1464 µm |
|---|---|
| Substrate | Silicon |
| Site material | Iridium |
| Thickness | 15 µm |
| Neural interface volume | 1.272 mm³ (higher than 80% of 371 designs) |
| Site coverage density | 219.9 sites/mm² (higher than 49% of 371 designs) |
| Brain coverage density | 201.3 sites/mm³ (higher than 97% of 371 designs) |