MWA (Micro Wire Array) Design Document (384)

Tip Exposure Method: Wire Cutoff

Impedance runge for each wire

25 micron pt/lr - 0.4 to 0.8 MQ

50 micron pt/lr - 0.2 to 0.4 MQ

25 micron SS - 0.6 to 0.9 MQ

50 micron SS - 0.4 to 0.6 MQ

Material

Platinum Iridium (H-ML coating)
Stainless Steel (Teflon Coating)

Wire Diameter

50 Micron (Typical)
25 Micron

Number of recording Wires (4-64):

(Even number only)

Include a Reference Wire?

Yes (Typical) - Same material as Electrode with 2 mm exposed
No
Other

Include a Ground connection?

Yes (Typical) – 20mm Silver wire which will extend out from the connector
Silver (Typical)
Stainless Steel
No
Other

Connector/s:

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.)

Other
Connector:
Recording Channel Pinout: (Insert Drawing here)

Note:
The Ground wire will extend from the connector, out of the epoxy. Silver Ground wire should not be inserted into the brain, as it is toxic. It should rather be connected to a screw on the skull.


Physical Measurements

Epoxy Length (E) below connector

5mm (typical)
Other mm

Length of wire covered with Carbo Wax (C)

5mm (typical)
Other (upto 23mm)

Length of wire beyond Carbo wax(L)

2mm (typical)
Other (upto 10mm)

Include an Epoxy Blob?

No (typical)
Yes - Specify Distance from wire tip (D) mm

Array Layout and Channel connections
Custom Layout

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.

Notes:
1. Looking from the top through the connector, 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.
2. Please try to have as little as possible cross over wires or electrodes at the connector side, for example keep the Ref on the left side, and with E1 and E16 on the left side of the layout.

Array Layout and Channel connections Example

Below is an example of a 16-channel layout assignment:

Distance between Electrodes (BE):

0.25 mm (Typical)
0.5 mm
0.75 mm
1.0 mm

Distance between Rows (BR)

0.5 mm (Typical)
0.25mm

Upload Custom Design
DEVELOPED BY: CBSOFT TECH