Method and apparatus for providing hermetic electrical feedthrough
A method and apparatus suitable for forming hermetic electrical feedthroughs in a ceramic sheet having a thickness of .ltoreq.40 mils. More particularly, the method yields an apparatus including a hermetic electrical feedthrough which is both biocompatible and electrochemically stable and suitable for implantation in a patient's body. The method involves: (a) providing an unfired, ceramic sheet having a thickness of .ltoreq.40 mils and preferably comprising .ltoreq.99% aluminum oxide; (b) forming multiple blind holes in said sheet; (c) inserting solid wires, preferably of platinum, in said holes; (d) firing the assembly of sheet and wires to a temperature sufficient to sinter the sheet material but insufficient to melt the wires; and (e) removing sufficient material from the sheet lower surface so that the lower ends of said wires are flush with the finished sheet lower surface.
Second Sight Medical Products, Inc.
Y Y Y H H H H Y Y H H H Y
Y10T Y10T Y10T H01L H05K H01L H01L Y10T Y10T H05K H05K H05K Y10T
additional additional additional additional additional additional inventional additional additional additional additional inventional additional
Jerry Robert J.
Ok Greenberg