Re:First 2D, non-silicon computer developed
by close04 on Monday June 16, 2025 @04:11AM
(#44287560)
It shows just the symbols of the elements (W, Se, Mo) and the number 2, not the compounds. The W, S, M, and 2 characters are in the correct place on a QWERTY keyboard, and they appended the necessary characters to complete the symbols as needed, even if the "e" in Se and "o" in Mo aren't in the correct spot on the layout.
Re:First 2D, non-silicon computer developed
by magicalhippo on Monday June 16, 2025 @01:14AM
(#44286787)
From the abstract[1]:
This enabled circuit operation below 3 V with an operating frequency of up to 25 kHz, which was constrained by parasitic capacitances
I would guess process improvements would help a lot towards lowering those parasitics. So I wouldn't take this initial attempt as a guide for ultimate speed.
Since this is 2D materials, a capacitor is a dielectric sandwiched by two conductors and capacitance scales linearly with area, I would assume just scaling things down would help immensely with parasitic capacitance. Changing materials or process could also change the dielectric constant which also affects the capacitance linearly.
Paper is sadly not open access, so I can't check if they mention this or have done some theoretical peak calculations or something. Would indeed be interesting to know.
Re:First 2D, non-silicon computer developed
by m-watson on Monday June 16, 2025 @10:52AM
(#44290151)
Something that is nice with MoS2 and the others are transition metal dichalcogenides and have some beneficial physical properties like a natural electronic bandgap, unlike silicon.
Re:First 2D, non-silicon computer developed
by IsTom on Tuesday June 17, 2025 @04:42AM
(#44296964)
And the part that is substrate, not the packaging is tiny and thin. It's much less than a gram of material in CPUs and even less in smaller chips. That's not going to be a significant part of final price. Also remember that silicon currently used is not some regular sand, but grown monocrystals that are a bit pricier.
Re:First 2D, non-silicon computer developed
by kxndnddn on Monday June 16, 2025 @10:01AM
(#44289576)
I don't see how that would be relevant since the melting temperature of Silicon is already _significantly_ higher than temperatures on Venus can reach outside of reentry
How high could this technique go?
This enabled circuit operation below 3 V with an operating frequency of up to 25 kHz, which was constrained by parasitic capacitances
I would guess process improvements would help a lot towards lowering those parasitics. So I wouldn't take this initial attempt as a guide for ultimate speed.
Since this is 2D materials, a capacitor is a dielectric sandwiched by two conductors and capacitance scales linearly with area, I would assume just scaling things down would help immensely with parasitic capacitance. Changing materials or process could also change the dielectric constant which also affects the capacitance linearly.
Paper is sadly not open access, so I can't check if they mention this or have done some theoretical peak calculations or something. Would indeed be interesting to know.
[1]: https://www.nature.com/articles/s41586-025-08963-7
It’s confusing to me because moly d is a very common lubricant, even for home uses.
Modern microprocessor built from complementary carbon nanotube transistors https://www.nature.com/articles/s41586-019-1493-8
ie: https://sam.zeloof.xyz/category/semiconductor/
nowadays there's at least a chip in most physical objects...
https://en.wikipedia.org/wiki/One-instruction_set_computer