Method of manufacturing a micromechanical oscillating mass balan

Details Method of manufacturing a micromechanical oscillating mass balan Method of manufacturing a micromechanical oscillating mass balan

1997-07-24

1999-09-07

Young, Lee W.

Metal working

Method of mechanical manufacture

Electrical device making

177210FP, H01F 706

Patent

active

059467959

ABSTRACT:
A micromechanical oscillating mass balance and method adapted for measuring minute quantities of material deposited at a selected location, such as during a vapor deposition process. The invention comprises a vibratory composite beam which includes a dielectric layer sandwiched between two conductive layers. The beam is positioned in a magnetic field. An alternating current passes through one conductive layers, the beam oscillates, inducing an output current in the second conductive layer, which is analyzed to determine the resonant frequency of the beam. As material is deposited on the beam, the mass of the beam increases and the resonant frequency of the beam shifts, and the mass added is determined.

REFERENCES:
patent: 4294105 (1981-10-01), Kelly

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