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  2. Piezoelectric microelectromechanical systems - Wikipedia

    en.wikipedia.org/wiki/Piezoelectric_micro...

    The additive approach: The piezoelectric thin films are deposited on silicon substrates with layers of insulating and conducting material followed by surface or silicon bulk micromachining. The subtractive approach: Single crystal or polycrystalline piezoelectrics and piezoceramics are subjected to direct bulk micromachining and then electrodes.

  3. Thin-film bulk acoustic resonator - Wikipedia

    en.wikipedia.org/wiki/Thin-film_bulk_acoustic...

    The use of thin film piezoelectric materials in electronics began in the early 1960s at Bell Telephone Laboratories/Bell Labs. Earlier piezoelectric crystals were developed and used as resonators in applications like oscillators with frequencies up to 100 MHz.

  4. Ultrasonic motor - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_motor

    Canon was one of the pioneers of the ultrasonic motor, and made the "USM" famous in the late 1980s by incorporating it into its autofocus lenses for the Canon EF lens mount. Numerous patents on ultrasonic motors have been filed by Canon, its chief lensmaking rival Nikon , and other industrial concerns since the early 1980s.

  5. Piezoelectric micromachined ultrasonic transducer - Wikipedia

    en.wikipedia.org/wiki/Piezoelectric_micro...

    Piezoelectric micromachined ultrasonic transducers (PMUT) are MEMS-based piezoelectric ultrasonic transducers.Unlike bulk piezoelectric transducers which use the thickness-mode motion of a plate of piezoelectric ceramic such as PZT or single-crystal PMN-PT, PMUT are based on the flexural motion of a thin membrane coupled with a thin piezoelectric film, such as PVDF.

  6. Inkjet technology - Wikipedia

    en.wikipedia.org/wiki/Inkjet_technology

    Thermoplastic DOD inkjets print at or above the piezoelectric Curie temperature and must be continuously poled to work. Piezo D33 displacement had to be optimized to lower drive voltages. See Piezo-response force microscopy for relevant theory. Prior research in 1980 by James McMahon about the six piezo physical poling states and tests to ...

  7. Thin-film optics - Wikipedia

    en.wikipedia.org/wiki/Thin-film_optics

    Thin-film optics is the branch of optics that deals with very thin structured layers of different materials. [1] In order to exhibit thin-film optics, the thickness of the layers of material must be similar to the coherence length ; for visible light it is most often observed between 200 and 1000 nm of thickness.

  8. NYT ‘Connections’ Hints and Answers Today, Saturday, December 14

    www.aol.com/nyt-connections-hints-answers-today...

    2. These words are typically heard when you're placing a bid on something. 3. Related to money and/or monetary units. 4. All of the terms in this category precede a common three-letter noun (hint ...

  9. Nanogenerator - Wikipedia

    en.wikipedia.org/wiki/Nanogenerator

    A piezoelectric nanogenerator is an energy-harvesting device capable of converting external kinetic energy into electrical energy via action by a nano-structured piezoelectric material. It is generally used to indicate kinetic energy harvesting devices utilizing nano-scaled piezoelectric material, like in thin-film bulk acoustic resonators. [20 ...

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