Three-dimensional microfabrication may one day enable less expensive and more expedient production of electrode arrays for use as neuroprosthetics and neural research tools. However, conventional 3D microfabrication techniques cannot yet produce high aspect ratio patterns or consistent results.
Researchers at the University of Utah have created a novel technique for the 3D microfabrication of electrode arrays. This method uses 3D lithography to construct a mold for electrode arrays. A layer of electrode array substrate is deposited onto the electrode array, using pre-existing arrays, and is then dissolved under the mold. The resulting mold enables consistent, inexpensive electrode array production.