SAW DEVICES, PROCESSES FOR MAKING THEM, AND METHODS OF USE
First Claim
1. An integrated circuit chip having a SAW device as an on-chip component.
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Accused Products
Abstract
The design, fabrication, post-processing and characterization of a novel SAW (Surface Acoustic Wave) based bio/chemical sensor in CMOS technology is introduced. The sensors are designed in AMI 1.5 μm 2 metal, 2 poly process. A unique maskless post processing sequence is designed and completed. The three post-processing steps are fully compatible with any CMOS technology. This allows any signal control/processing circuitry to be easily integrated on the same chip. ZnO is used as the piezoelectric material for the SAW generation. A thorough characterization and patterning optimization of the sputtered ZnO was carried out. The major novelties that are introduced in the SAW delay line features are: The embedded heater elements for temperature control, compensation and acoustic absorbers that are designed to eliminate edge reflections and minimize triple transit interference. Both of these attributes are designed by using the CMOS layers without disturbing the SAW performance.
88 Citations
22 Claims
- 1. An integrated circuit chip having a SAW device as an on-chip component.
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6. An integrated circuit chip having an embedded heater structure.
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7. A SAW device having an absorber structure which comprise CMOS layers of metal1, metal2, and polysilicon.
- 8. An LC circuit which comprises a SAW device and an amplifier on the same chip.
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10. A SAW resonator fabricated using CMOS technology.
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11. A process for fabricating a SAW device using standard CMOS technology, comprising:
- i) depositing piezoelectric material on top of SAW IDT'"'"'s, and ii) performing a wet-etching of the piezoelectric material to expose the pads for bonding, wherein the SAW IDT'"'"'s are patterned on the dielectic layer during CMOS fabrication and a reactive ion etch releases the IDT'"'"'s from the dielectric layer before the piezoelectric material is deposited.
- View Dependent Claims (15, 16)
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18. A SAW based integrated circuit based detection system comprising:
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a sensor having at least one sensing element for selectively combining with target molecules, said sensor generating a signal when combined with said target molecules responsive to incident electromagnetic radiation applied to said sensor/target combination; and an integrated circuit microchip to which the sensor is affixed, the integrated circuit microchip including; a plurality of detection channels operatively associated with said sensing elements, each of said detection channels including a detector for detecting electromagnetic signals, said detectors selected from the group consisting of photodiodes and phototransistors. - View Dependent Claims (19, 20, 21, 22)
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Specification