Patent ID: 7183768
Filing Date: 2007-02-27
Classification: G01R

Abstract:
1. An ultra sensitive in-situ magnetometer system, comprising: a deposition source; a cantilever paddle of the chip on which magnetic atoms incident from the deposition source are deposited; an interferometer for sensing vibration of the cantilever paddle of the chip to output an electrical signal; a deposition head for maintaining an appropriate distance between a cleaved fiber end of the interferometer and the surface of a cantilever paddle of the chip; a high voltage amplifier for amplifying the signal that is supplied to piezo material; a piezoelectric material oscillated by the amplified voltage from the high voltage amplifier; a lock-in amplifier for detecting a signal from the piezoelectric material; a phase locked loop (PLL) for performing a phase locking operation between a signal output from the interferometer and the signal input to the piezoelectric material; a power amplifier for amplifying an alternating current (AC) voltage output from the lock-in amplifier and applying the amplified AC voltage to the torque coil inside the deposition head; and an oscillator for receiving an output voltage of the interferometer from the lock-in amplifier and monitoring displacement of the cantilever paddle.