Talk:Diffused junction transistor

FETs

It mentions FETs only in the intro. The rest seems to be about junction transistors. Should be clearer eg add some mention (at the end) about diffused FETs ? Strangely Field-effect transistor does not mention diffusion, but perhaps its used to make the MODFET ? Perhaps the JFET is causing confusion ? - Rod57 (talk) 17:04, 10 January 2016 (UTC)

Or we could fix the lead. I think the unsourced opening definition is incorrect. Dicklyon (talk) 17:07, 10 January 2016 (UTC)

In this 1966 book, FET and diffusion transistor appear to be mutually exclusive. I have not found any source that uses "diffusion transistor" to talk about FETs. The term came about as one of the ways to make the PN junctions for a bipolar transistor. Diffusion steps are used in many ways of making FETs, but I have not ever heard them called diffusion transistors. Dicklyon (talk) 17:12, 10 January 2016 (UTC)

I agree that "diffusion transistor" applies only to BJTs. FETs were invented first but were not practical until about 1957 when they were made by diffusion; all practical FETs are diffused. It makes sense to distinguish BJTs because there were many processes used to make them. Glrx (talk) 22:06, 12 January 2016 (UTC)

I always thought the name was diffused junction transistor, with junction being an important part of the name. I am not sure of the timeline, but it might have been about the time of the development of JFET and MOSFET, when the junction distinction was important. What is the right WP:COMMONNAME for this article? Gah4 (talk) 23:45, 9 September 2019 (UTC)

Sources say that what's called a "diffusion transistor" is one where minority carriers move primarily by diffusion in the base region. The topic of this article is not that. I think "Diffused-junction transistor" might be better, like what Gah4 is saying above (but I'd put the hyphen since diffused applies to the junction more than to the transistor, I think?). Dicklyon (talk) 00:33, 10 September 2019 (UTC)

Or using the defs in this book, either Diffused transistor or Diffused-juction transistor might be OK. Dicklyon (talk) 02:10, 10 September 2019 (UTC)

OK, the sequence is grown-junction transistor, alloy-junction transistor, and then this page. Gah4 (talk) 19:16, 10 September 2019 (UTC)

Also, some is described in: William_Shockley#Career. Gah4 (talk) 19:23, 10 September 2019 (UTC)

I have "moved" (retitled) the page. Even the people writing about transistors find this confusing. --Wtshymanski (talk) 20:06, 10 September 2019 (UTC)

Thanks! Gah4 (talk) 21:18, 10 September 2019 (UTC)

made mass-produced monolithic integrated circuits possible

The article says made mass-produced monolithic integrated circuits possible, which is true, but as far as I know, it also, earlier, made mass production of individual transistors possible. It is easy to forget how special and expensive transistors were in the early days. My favorite story is the design of the original Touch-Tone (tm) phone, which was designed using one transistor to run two oscillators at different frequencies at the same time. As well as I know, that design was used for many years. Gah4 (talk) 21:23, 10 September 2019 (UTC)

The article says: cost much less, and the characteristics of planar transistors improved very rapidly, quickly exceeding those of all earlier transistors and making earlier transistors obsolete which had a {{cn}} that I removed. We all know that planar transistors obsoleted the others, as that is all we buy today. Is the {{cn}} for the very rapidly? (As opposed to sort of rapidly, or not rapidly at all?) Gah4 (talk) 19:41, 14 April 2020 (UTC)

Planar transistors

Don't know much, but it seems the section is tooo small, doesn't reflect its impact, considering they were in use since 1960is until around 2010 ~2026-36421-83 (talk) 06:54, 23 June 2026 (UTC)

here are called "Planar FETs" - no idea whether that's true.~2026-36421-83 (talk) 06:56, 23 June 2026 (UTC)

acc to this it seems it is true; planar transistors aka planar FETs~2026-36421-83 (talk) 07:53, 23 June 2026 (UTC)

Planar transistors disambiguation

I think there is a bit of a problem. Planar transistor redirects here and it has a section in this article. It's also obvious, if I am not greatly mistaken, it refers to the transistor used between 1960s and early 2010. But it also seems that the same term applies to topological differentiation between transistors because we have Planar double-gate MOSFET and FlexFET which are both planar (and are also multi-gate field-effect transistors (MuGFETs)) as opposed to non-planar transistors, or 3D transistors (eg FinFET and the GAAFET). That should be taken into account. ~2026-36421-83 (talk) 07:16, 23 June 2026 (UTC)