Magnetic Matrix Connector for High density, Soft Neural Interface

INV-20017

 

In this invention, the Magnetic Matrix connector (MagMatrix) for high-density, soft neural interfaces such as neural microelectrode arrays (MEA) is used. In order to interface with the soft devices and rigid measuring electronics, a connector is necessarily required. Currently, there are several available strategies such as utilizing a Anisotropic (ACF) cable, Zero Insertion Force (ZIF) connector, wire bonding, soldering, etc. Those methods all have their limitations, especially when the number and density of the device channels are scaled up. The soldering/wire bonding approaches are permanent to the devices, so it is not possible to detach the connector from devices without causing any damages. A connector with high scalability and reusability will essentially become a useful tool for the state-of-the-art, high density, soft neural interfaces.

 

In this invention, the MagMatrix connector adopts a matrix of solder balls on the PCB board to interface with the soft neural devices. The 2-dimensional layout helps decrease the space needed for placing the contact pads, which is similar to the Ball Grid Array (BGA) interface used in the packaging of integrated circuits. The device is then sandwiched between the bottom PCB board and a transparent top board by magnetic force. This invention comprises:

- Manufacturing of the multiple layer PCB

- Via filling with resin and electroplating 

- Solder ball array bumping 

- Omnetics & magnets assembly 

- Device alignment 

- Top board alignment and Amplifier board insertion

 

- Reusability

- High scalability

- High stability

 

- Electrocorticography 

- High spatial resolution, selective neural stimulation

- Electrocardiogram 

- Wireless recording/stimulation

 

- Licensing

- Partnering

- Research collaboration