Jauge à trame pelliculaire
English translation: semiconductor strain gauge
| 14:12 Nov 20, 2001 |
| French to English translations [PRO] Tech/Engineering | |||||||
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|  Selected response from: Sheila Hardie Spain Local time: 00:36 | ||||||
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| 3 -1 | semiconductor strain gauge |
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| 1 | foil strain gauge |
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Answers
52 mins confidence: 
peer agreement (net): -1
peer agreement (net): -1semiconductor strain gauge Explanation: I think it might be a semiconductor strain gauge. If you have a look at the references below, they might help. I hope so! Bonne chance! Sheila Electrical Strain Gauges * Resistance * Capacitance * Photoelectric * Semiconductor Semiconductor Strain Gauges In piezoelectric materials, such as crystalline quartz, a change in the electronic charge across the faces of the crystal occurs when the material is mechanically stressed. The piezoresistive effect is defined as the change in resistance of a material due to an applied stress and this term is used commonly in connection with semiconducting materials. The resistivity of a semiconductor is inversely proportional to the product of the electronic charge, the number of charge carriers, and their average mobility. The effect of applied stress is to change both the number and average mobility of the charge carriers. By choosing the correct crystallographic orientation and dopant type, both positive and negative gauge factors may be obtained. Silicon is now almost universally used for the manufacture of semiconductor strain gauges. http://bits.me.berkeley.edu/beam/sg_2a.html#Resistance Strai... Manufacturers offer five principal types of strain gauge pressure sensors: * Sputtered. For this type of sensor, the manufacturer makes the sensing gauges by sputter-depositing an insulating layer (e.g., glass) on the metal diaphragm and then places thin metal film strain gauge elements onto the transducer's diaphragm. * Chemical vapor deposition. As the name describes, the manufacturer deposits chemically vaporized insulator and gauge materials on the diaphragm to create the sensing gauges. * Diffused/implanted semiconductor. The producer etches a diaphragm into bulk silicon, and the gauges are doped into the same material. * Bonded foil. The manufacturer bonds metal foil gauges with epoxy-glass or film backing to the diaphragm using adhesives. * Bonded semiconductor. With this type of sensor, the producer bonds individual semiconductor gauges to the diaphragm using adhesives or glass. http://www.sensorsmag.com/articles/0499/0499_36/main.shtml http://michelhubin.multimania.com/DOTECSI/DOTECSI6/chap611.h... jauge à trame pelliculaire De plus en plus on remplace les jauges à fils par ces dernières dont la technologie se prête mieux aux procédures automatisées propres aux fabricants de composants électroniques. Le fil est alors remplacé par un conducteur mince et plat obtenu par photogravure. Les récents progrès des techniques photolithographiques autorisent la réalisation de brins de jauge de 3µm de largeur séparés par moins de 2µm. Ces jauges présentent de nombreux avantages: masse plus faible donc moindre inertie, dissipation thermique accrue, effet transversal réduit (on peut varier la largeur), épanouissement aux extrémités facilitant la connexion, géométries complexes adaptées à des cas très particuliers facilement réalisables. On donne ci- dessus quelques exemples de géométries courantes. .1. jauges de contrainte On distingue plusieurs technologies dans la réalisation de telles jauges : * fils collés sur un support, * jauges à trame pelliculaire, * jauges diffusées, * jauges en couche mince. |
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2 hrs confidence:
foil strain gauge Explanation: Guess |
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