Talk:Sheet resistance

The Units section[edit]

I don't understand the example with the 21 Ω/sq and 63 Ω. I would understand it, if the sentence would start like Example: A 3 unit long by 1 unit wide (aspect ratio = 3)... - because this is in agreement with the picture above. Am I correct or did I misunderstand the concept? — Preceding unsigned comment added by 31.30.7.82 (talk) 10:48, 29 October 2014 (UTC)[reply]

article is not so bad[edit]

the article is not so bad

I agree, I don't know why it is labeled as needing cleanup and reference citing, it looks quite fine and complete to me 146.103.254.11 (talk) 09:59, 13 February 2008 (UTC)[reply]

I wouldn't consider it complete but I agree, it is not too bad. —Preceding unsigned comment added by Lindvaln (talk • contribs) 11:03, 29 June 2008 (UTC)[reply]

the article is pretty OK. of course it can expand much more, there are tonnes of docs about it. but clean what up? rewrite?--Infestor (talk) 09:16, 7 October 2008 (UTC)[reply]

ohms per square[edit]

Ohms per square is a core concept: that for a given material, and a given thickness, the resistance from an electrode across one side, to the opposite side, is a constant -- the same for small square and large squares -- an intrinsic property of that material.

The article would be less esoteric and more interesting and practical if it gave the actual ohms per square of common materials, such as standard household aluminum foil.

A one-foot strip of household Al foil about 3/16-in wide measures about one-tenth of an ohm. So the ohms-per-square would be about .001 for this material (because it is 64 squares in series)? -71.174.179.130 (talk) 17:29, 19 May 2009 (UTC)[reply]

What common conductors have a standard thickness ? (perhaps copper on PCBs?) Even aluminium cooking foil comes in different weights per square meter. - Rod57 (talk) 14:07, 16 September 2018 (UTC)[reply]

But cooking foil seems to range from 16 μm to 24 μm, so the differences are insignificant for the (correct) calculation above. --RichardW57m (talk) 13:22, 22 December 2021 (UTC)[reply]

It is bulk resistivity, in ohm cm, divided by the thickness. Al is 2.65e-6 ohm cm, or 0.0265 ohm μm. Divide by 24μm is about 0.001 ohms/square. Gah4 (talk) 14:32, 22 December 2021 (UTC)[reply]

Surface resistivity and topological insulators[edit]

Surface resistivity redirects here, so should we mention topological insulators that have surface conductivity ? - Rod57 (talk) 13:52, 16 September 2018 (UTC)[reply]

sheet resistivity[edit]

When I first learned about it, the quantity was called sheet resistivity. It is the 2D equivalent of the 3D bulk resistivity, commonly called just resistivity. (That is, bulk resistivity divided by thickness.) Sheet resistance, then, would be for a specific shape of sheet. When did the name get changed to sheet resistance? Gah4 (talk) 21:36, 4 April 2019 (UTC)[reply]

Citation[edit]

I add a new reference to give a better definition for sheet resistance (sheet resistivity). Will work on this article a little bit more for the rest. This one is very important to Materials Physics and Condensed Matter Physics. But current version is so confusing and lack of scientific research examples. Jhyalex (talk) 07:26, 23 February 2023 (UTC)[reply]