
US Patent No: 4,628,174
Number of patents in Portfolio can not be more than 2000
Forming electrical conductors in long microdiameter holes
Stats
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Dec 9, 1986
Issued date -
Sep 17, 1984
filing date -
06/651,014
serial no -
Expired
status
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Abstract
A conductor is provided through a narrow bore hole of a wafer. The hole has a length-to-diameter ratio in excess of six. The conductor is formed by condensation of metal vapor generated at the bottom of said hole by a spark. The spark is generated between a vaporizable metal at the bottom of the hole and a thin electrode disposed above the hole from a conventional automobile coil and battery operating through a mercury switch.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,505,948 Method of coating ceramics and quartz crucibles with material electrically transformed into a vapor phase | 13 | 1984 | |