Electric heating – Metal heating – By arc
Patent
1996-05-16
1998-12-01
Mills, Gregory L.
Electric heating
Metal heating
By arc
21912185, 21912184, 427555, B23K 2600
Patent
active
058442006
ABSTRACT:
The present invention is a method for drilling a subminiature through hole through a substrate. The through holes of the present invention are preferably drilled through an alumina substrate which is essentially impervious to aqueous electrolytes and blood over long periods of storage in potentially reactive environments. The holes are drilled by directing a sealed type CO.sub.2 laser at a predetermined position located on the substrate, energizing the laser at a power of approximately 75 to 225 watts, such that the laser beam focuses on the substrate at the predetermined position, and treating the substrate after the laser has drilled the hole.
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Hecht, J., The Laser Guidebook. New York, McGraw-Hill, 1992. pp 161-167.
Graves Jeffrey
Leader Matthew J.
Moorman John M.
Mills Gregory L.
SenDex Medical, Inc.
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