Method and apparatus for thermal process control in the electroforming of stampers for production of CD/LD data carriers
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United States of America Patent
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Nov 10, 1998
Grant Date -
N/A
app pub date -
Jan 16, 1997
filing date -
Jan 23, 1996
priority date (Note) -
Expired
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Abstract
A method and an apparatus for thermal process control in electroforming stampers for the production of CD/LD data carriers or the like. The temperature of an electrolytic solution in an electroforming cell is maintained at a value nearest a specific maximum temperature by raising or lowering the temperature of the electrolytic solution in a storage tank provided outside of the electroforming cell as a function of the temperature measured in a cathode space of the electroforming cell. A temperature sensor is disposed in or near the cathode space adjacent an electrolyte injection nozzle in a space between the anode and cathode means for supplying signals to a control unit. The temperature sensor and the injection nozzle are preferably assembled into a single mounting unit. The electroforming process can thus be run with an optimum effectivity in the vicinity of a maximum permissible temperature of the electrolytic solution.
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