Patent ID: 9354197
Filing Date: 2016-05-31
CPC Classification: G01N

Claim Text:
1. A micromachined oxygen sensor with net mesh structure electrodes comprising: a silicon substrate; a suspending membrane on the silicon substrate with a micromachined cavity underneath; a heating element thermistor being connected to a temperature elevation driving circuit and disposed on top of the suspending membrane; a temperature sensing thermistor surrounding the heating element thermistor in close proximity and connected to the temperature elevation driving circuit as a temperature measurement feedback to the temperature driving circuit for the heating element thermistor; a solid electrolyte formed by a yttrium stabilized zirconia oxide layer and disposed on top of the suspending membrane; two net mesh structure electrodes which are formed by a platinum layer and disposed on top of the yttrium stabilized zirconia oxide; wherein the two net mesh structure electrodes are patterned as comb shape electrodes with dense mesh holes; and wherein the two comb shape electrodes are disposed interlaced with each other; and two wire bonding pads which are formed by a gold metal layer and patterned on top of the yttrium stabilized zirconia oxide layer.