Talk:MOSFET

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Totally Useful Article[edit]

As a board and ASIC level designer engineer for the past three decades, I think this article provides necessary information and is a good reference for new and experienced designers. It is definitely not for semiconductor physicists, because they will be way above this article, however it likely will be above non-technical persons who likely won't visit this page anyway or who won't need to read more than the introductory paragraphs. MOSFETs are complicated devices and if you don't know at least what is given in this article then you very likely won't be able to read the data sheets of the various types of discrete MOSFETs or of ICs whose interface outputs/inputs are made of such MOSFETs in order to design proper circuits. This article is a good and easily accessible resource for new designers or old designers - who may only do one or two designs every year or two. Of course, it's also a similarly useful resource for engineering, technology and technologist students to use in addition to their textbooks, which may provide more or less information. So, please don't dumb this article down. Indeed, it should be improved to present the information needed in the best way possible to allow these types of people to do real work. — Preceding unsigned comment added by 207.107.66.194 (talk) 22:58, 19 December 2016 (UTC)

  • While I agree with what you are saying, the argument can (and perhaps should) be made that wikipedia is not for people who are designers, but a general resource. Designers should perhaps consult other sources (textbooks on the matter, for example). Hence, it might make sense to simplify the article at least somewhat.

TheUnnamedNewbie (talk) 19:12, 4 January 2017 (UTC)

Totally Useless Article[edit]

The perhaps half-a-dosen academics worldwide who research FETs this article wouldn't say anything new. For the other perhaps 250 million who just wants to know how to design a circuit with a FET, the article says NOTHING. — Preceding unsigned comment added by 115.70.177.64 (talk) 06:46, 16 November 2015 (UTC)

External links modified[edit]

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In typical bot framed idiocy the first link is to a paywall where reading the article will cost me a week's food.

Weatherlawyer (talk) 15:48, 6 October 2016 (UTC)

Merge MISFET[edit]

I suggest that MISFET is merged here. The article is only a single short paragraph and MOSFET already says nearly all of what is there. As I understand it, the difference is only a question of the materials used, so it is unlikely that MISFET would ever be substantially different from this article even if it were fully expanded. SpinningSpark 18:52, 8 March 2016 (UTC)

strongly object. These are different concepts. Wikipedia is not paper to squeeze everything into one page. That the page is short means semi engineers don't give a dime for wikipedia, but it does not mean there is nothing to write. Staszek Lem (talk) 16:26, 29 April 2016 (UTC)
  • Maybe. If the MISFET article can be expanded a bit to talk about the materials that are alternatives to oxide, and if transistors of that sort are not already described in MOSFET, then it can stay separate. Dicklyon (talk) 16:48, 29 April 2016 (UTC)
Exactly; there is not a bit but lots. However it is a highly specialized area, and things are experimental, and experts in materials science are too busy to waste their time here. Staszek Lem (talk) 17:01, 29 April 2016 (UTC)
  • Agree. (and then redirect). MESFET should stay separate, but I don't see much reason to keep MISFET separate. For many years, silicon (and so not metal) gates have been used, without changing the acronym. Insulators other than SiO2 are used, but most often still oxides. Even if an oxygen free insulator is used, the physics isn't so different. Gah4 (talk) 11:32, 11 January 2017 (UTC)

FET as name for MOSFET[edit]

I just undid an edit where someone added "FET" as an abbreviation for MOSFET. I feel like this is not valid, as it implies that MOSFET's are the only type of field-effect transistors, which is clearly not the case. On that same note, I realise that most devices we call MOSFET are actually not really MOS, but Poly-oxide-silicon, so it's kinda an iffy situation. Opinions? TheUnnamedNewbie (talk) 10:23, 11 January 2017 (UTC)

Along the same line of thought, could someone maybe add the phonetic pronounciation of MOSFET? (so, moss fett) TheUnnamedNewbie (talk) 10:26, 11 January 2017 (UTC)
I suppose my thought would be to allow it. Yes there are others, but MOSFET (or, as you note, SOSFET) are so much more common. It is usual to give the more common form the simpler name, and require the appropriate qualification for the less common form. Any idea what the ratio of JFET to MOSFET production is? Include every transistor in every integrated circuit and discrete device produced? Gah4 (talk) 10:49, 11 January 2017 (UTC)
I don't know any numbers, but I am aware that JFET's are far less common, by many orders of magnitude. However, I don't think that means that FET is a acceptable name for a MOSFET, especially since a FET is more a conceptual thing (steering current flow with an electric field) and a MOSFET is a practical implementation. Perhaps a compromise would be to mention that in industry lingo, "FET" is often used to refer to a MOSFET, but not all field-effect transistors are MOSFETs? Perhaps something like this (feel free to improve the wording, just trying to get the concept):
The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of [field-effect transistor] (FET) used for amplifying or switching electronic signals which has an insulated gate whose voltage determines the conductivity of the device. Although FET is sometimes used when refering to MOSFET devices, other types of field-effect transistors also exist.
TheUnnamedNewbie (talk) 12:36, 11 January 2017 (UTC)
Close enough for me. A quick search found http://www.ti.com/lit/ds/symlink/opa655.pdf, which, as I finally found from the simplified internal schematic, is actually a JFET. I suspect FET is used often enough referring to MOSFET, though. One that I find funny is CMOSFET, which doesn't make sense to me. Gah4 (talk) 13:36, 11 January 2017 (UTC)
I changed the introduction. TheUnnamedNewbie (talk) 11:58, 12 January 2017 (UTC)


  • Oppose. The JFET isn't dead yet. Andy Dingley (talk) 11:31, 11 January 2017 (UTC)

Naming[edit]

It was at that time the Bell Labs version was given the name bipolar junction transistor, or simply junction transistor, and Lilienfeld's design took the name field effect transistor.[citation needed] OK, for one, the name transistor came from the contrast with transconductance, the description for vacuum tubes as voltage controlled current sources. (That is, dI/dV). When (year) and who named the Lilienfeld device, which as I understand it didn't really work, a field effect transistor? That should satisfy the [citation needed]. Gah4 (talk) 15:40, 18 May 2017 (UTC)

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Can you prove (or cite) a negative?[edit]

In the history section appears the words, "Bell Labs was able to work out an agreement with Lilienfeld, who was still alive at that time (it is not known if they paid him money or not).[citation needed]"

Ok. Wait. I change my mind. Maybe nothing is amiss here.

When I first read this (very late/early) my brain thought the part that needed the citation was whether or not he (Lilienfeld) had been paid any money. My issue with this is that if he received no money you will most likely never be able to prove conclusively And cite it because very few people documenting such a history would note that he didn't get paid. But that doesn't mean conclusively that he didn't.

But... now that my brain has re-read this section for theb4-billionth time as I write this I now understand that the issue at hand is citing whether or not Bell Labs was able to work out an agreement with Lilienfeld.

Sorry. But I posted this anyone because maybe someone will read it and realize that all of us can work to be clearer and we make mistakes in interpretation - especially at such late/early hours.

Thank you all. 166.142.172.242 (talk) 07:05, 9 September 2017 (UTC)

David