Patent ID: 6032527
Filing Date: 2000-03-07
Classification: G01F

Abstract:
A microanemometer comprising:a) an electrically conductive resistor in the form of a first semiconductor wafer doped with an impurity having1) an upper substantially planar surface;2) a lower substantially planar surface having a peripheral edge;b) a second semiconductor wafer bonded to the first semiconductor wafer having1) an upper substantially planar surface;2) a lower surface;3) a cavity having a peripheral edge and a peripheral margin defined on the upper planar surface and bounded by the peripheral edge of the cavity wherein the lower planar surface of the first semiconductor is bonded to the peripheral margin of the cavity so as to at least partially close the cavity wherein 0.025 to 99% of peripheral edge of the lower planar surface of the first semiconductor overlaps with the peripheral edge of the cavity; andc) a means for electrically connecting the resistor to a current source.