MEA (Micro Electrode Array) Design Document (385)
Platinum Iridium (Parylene C Coating)
Electrode Shank Diameter
75 Micron (Typical)
Number of recording Electrodes (4-128)
(Even Number only)
Recording Electrodes Impedance
Recording Electrodes Tip Shape
Heated (Not recommended for Implantation)
Include a Reference Electrode?
Yes (Typical) - Same material as Electrode with 25Kohm Impedance
Include a Ground connection?
Yes (Typical) – 20mm Silver wire which will extend out from the connector
Yes- Same material as Electrode with no insulation (Make sure you include in the electrode layout as this will be treated like an electrode)
Include Polyamide tubing on Recording, Ref, and GND Electrodes?
Yes (Recommended only when electrodes are long)
A11365-001 (Male Omnetics connector- 8 channel 10-pin 0.050” pitch)
A12623-001 (Male Omnetics connector- 8 channel, 10-pin, 0.050” pitch with latching mechanism)
A8393-001 (Male Omnetics connector- 8 channel, 10-pin, 0.025” pitch, 2 guide posts.)
A79014-001 (NPD-18-DD-GS, Male Omnetics connector- 16 channel, 18-pin, 0.025” pitch, 6 guides posts.)
A70242-001 (Male Omnetics connector- 16 channel, 18-pin, 0.025” pitch, 6 guides posts, Nickel free, MRI compatible.)
A79038-001 (NPD-18-DDGS, Male Omnetics connector- 16 channel 18-pin, 0.025” pitch.)
A79022-001 (Male Omnetics connector -32 channel, 36-pin, 0.025” pitch, 4 guide posts.)
A72312-001 (Male Omnetics connector -32 channel, 36-pin, 0.025” pitch, 4 guide posts Nickel free, MRI compatible.)
Recording Channel Pinout: (Insert Drawing here)
When Ground is a silver wire and not an electrode, the silver wire will extend from the connector, out of the epoxy. Silver wire should not be inserted into the brain, as it is toxic. It should rather be connected to a screw on the skull. screw on the skull.
Fill out how you would like the electrodes, including the reference and ground electrodes to be laid out using E1-En, and Ref. Supply a separate document if necessary. If an electrode, versus a silver wire, is used for ground, please also place it on the layout.