The Redesign of a Multielectrode Semiconductor Array Intended for Implantation into the Brain of a Rhesus Monkey
Abstract
For the past ten years, graduate students at AFIT have been attempting to design, fabricate, test, and implant a multielectrode array capable of monitoring the visual cortex in the brain of higher order mammals. A 16 X 16 multielectrode semiconductor array, previously designed in NMOS technology and intended for implantation into the brain of a rhesus monkey, must be redesigned in CMOS technology. The multielectrode array, known as the AFIT brain chip, must also have its aluminum electrodes replaced with a corrosion resistant metal that is capable of withstanding a subsequent polyimide cure temperatures of 350 C. The possibility of depositing the corrosion resistant metal directly onto the aluminum electrode was investigated. The metals investigated were gold, platinum, silver, and nickel as a barrier metal for the previous three metals. The redesigned CMOS array was partially functional and preliminary results from the metal study indicate gold on aluminum with a nickel barrier between them as the most promising electrode replacement. Further work in this area is continuing. (KT)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA215352
Entities
People
- David P. Szczublewski
Organizations
- Air Force Institute of Technology