Talk:Thin-film bulk acoustic resonator

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Function?

Hi Khpsoi,

Your article offers a lot of technicalities but could you devote a few words in the lead to the function the thin-film bulk acoustic resonator is assumed to perform? The name suggests it is used to generate sound, is it a kind of speaker or sound box? It could be helpful for the reader if you could mention devices that performed a similar function in the past and present. Thanks a lot! →bertux 05:39, 9 October 2022 (UTC)[reply]

Now I think it is a frequency filter. Correct? →bertux 06:04, 9 October 2022 (UTC)[reply]

Hello, thanks being interested in this thin-film bulk acoustic resonator topic. A single resonator resonates (=vibrates, but unfortunately at high frequencies typically not hearable sound). Because of dimensions (thickness of the film between electrodes) typically needed are thin manufactured by thin filmmethods. In theory of the film would be thicker (not practically time and money needed) you could hear the sound!If the film would be a single piezoelectric crystal with large dimensions it could resonate with some sound. Filters are consisting of many vibrating resonators as described in the filter figure. Khpsoi (talk) 13:29, 21 December 2022 (UTC)[reply]

Hi Khpsoi, thanks for your answer! I am still unsure however about possible applications of the device. Is it typically used in labs, in households or cars? Is it generally a stand-alone device or is it part of a larger apparatus? Assuming it to be part of a larger unit, with what devices is it used in conjunction? In your answer you seem to point out what functions it does not have, without mention of the functions it can fulfill for it's user. Who are the customers? Is it used in kids' toys, computers, nuclear plants, motor cycles, testing appartus, weapons, robots?

I feel the lead of the article should give laymen like me an indication of its use cases, hopefully you can clarify this. Thanks a lot! →bertux 13:07, 25 December 2022 (UTC)[reply]

Hi Bertux,

it is widely used in mobile phones (for radio=high frequency filters) and other telecommunication devices for filtering out signals which are not wanted. It can be used in toys and measuring small amount of particles in air for example. Khpsoi (talk) 09:33, 30 December 2022 (UTC)[reply]

History

I'm curious about this statement: "The use of piezoelectric materials in electronics began in the early 1960s at Bell Telephone Laboratories/Bell Labs, where piezoelectric crystals were developed and used as resonators in applications like oscillators with frequencies up to 100 MHz."

How can this statement be accurate, given that quartz crystals had been widely used in electronic oscillators since before world war 2? Smac794 (talk) 13:13, 23 May 2024 (UTC)[reply]

Sorry noticing this question so late. You are quite right. The sentence should be splitted into two in the following way: 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.

Sorry for inaccuracy, I'll refine. Thanks Khpsoi (talk) 09:05, 22 August 2024 (UTC)[reply]