Patent ID: 11920994
Assignee: APPLIED MATERIALS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A system comprising:
a processing chamber;
one or more RF antenna to transmit a first RF signal within the processing chamber and to receive a second RF signal propagating from within the processing chamber; and
a sensor wafer disposed within the processing chamber, the sensor wafer comprising:
at least a layer of a piezoelectric material; and
a first integrated sensor assembly comprising:
a first surface acoustic wave (SAW) sensor disposed on at least the layer of the piezoelectric material, wherein the first SAW sensor is adapted to measure a first environmental condition of an environment located within the processing chamber responsive to receiving the first RF signal and to output the second RF signal having data associated with the measured environmental condition, wherein the first SAW sensor comprises:
a first interdigitated transducer (IDT) formed on a first region of the piezoelectric material, the first IDT comprising two comb-shaped electrodes comprising interlocking conducting digits disposed in a first spatial arrangement; and
a first plurality of SAW reflectors communicatively coupled to the first IDT and formed on a second region of the piezoelectric substrate, wherein the first plurality of SAW reflectors have a second spatial arrangement,

wherein the interlocking conducting digits in the first spatial arrangement or the first plurality of SAW reflectors in the second spatial arrangement generate a first signal modulation of the first and second RF signals, wherein the first signal modulation identifies the first SAW sensor.