Electrical resistance and temperature change upon exposure to semiconductors. Sensor detects breakage of ampoule containing molten semiconductor. Chemical reaction between hot semiconductor material and wire causes step increase in electrical resistance and temperature of wire. Step increase in temperature and resistance of sensor indicates presence of hot GaAs. Sensor used to shut down furnace automatically if ampoule breaks and prevents further release of molton semiconductor, which could quickly breach surrounding thin wall of cartridge, damage furnace, and/or release toxic vapors into surrounding area.
Sensor Detects Semiconductor Escaping From Ampoule
NASA Tech Briefs ; 18 , 9
1994-09-01
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Sensor Detects Semiconductor Escaping From Ampoule
Online Contents | 1994
Sensor Detects Semiconductor Escaping From Ampoule
NTRS | 1994
|Sensor Detects Semiconductor Escaping From Ampoule
Online Contents | 1994
Online Contents | 1995
NTRS | 1995
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