ImmersiveAmbientModecolor: #cdb5b5 (color 2)
Video Format : 22 (720p) openh264 ( https://github.com/cisco/openh264) mp4a.40.2 | 44100Hz
Audio Format: Opus - Normalized audio
PokeTubeEncryptID: c281d5dec82eaea28f685ba50a99d9c05f982b85f133b328d2ac5729f5f01ec2b948aae17fc10fd54c19a0bb77113150
Proxy : eu-proxy.poketube.fun - refresh the page to change the proxy location
Date : 1715872033524 - unknown on Apple WebKit
Mystery text : dVB1YWxCTmYxbk0gaSAgbG92ICB1IGV1LXByb3h5LnBva2V0dWJlLmZ1bg==
143 : true
94,695 Views • Dec 17, 2023 • Click to toggle off description
A second clarification: Hat tip to Jonathan M., who pointed out to me that DRAM soft errors are now found to be the result of radioactive elements in the packaging, not cosmic rays. Cosmic rays seem cooler though imo, ieeexplore.ieee.org/document/4208205
Bonus points if you can tell me how the semi-industry learned tantalum deposition.
Links:
- The Asianometry Newsletter: www.asianometry.com/
- Patreon: www.patreon.com/Asianometry
- Threads: www.threads.net/@asianometry
- Twitter: twitter.com/asianometry
Views : 94,695
Genre: Education
Date of upload: Dec 17, 2023 ^^
Rating : 4.982 (19/4,111 LTDR)
RYD date created : 2024-05-15T05:05:51.608326Z
See in json
YouTube Comments - 194 Comments
Top Comments of this video!! :3
"Branch Education" made a beautiful video about how exaclty DRAM works, with the precharge, opamps, etc.
28 |
In 1980 I was part of a team tasked with figuring out how to make 64K drams deal with the stray radioactive particles in the packaging materials. At that time 16K bit (bits nor bytes) memory chips were in production.
The 64Kbit memory chip was ramping up and it was quite a challenge.
It's amazing how things have progressed.
77 |
I was very active in the late '70's with homebrew computing.
For Do-It-Yourselfers the static RAM was definitely the way to go at that time.
Home memory systems had only a few Kbytes at that time. Static rams were still affordable for typical home computers.
Drams required critical timing that made them much harder to use.
A joke in the late '70's:
>> customer: What's the difference between static rams and dynamic rams?
>> clerk: static rams work, dynamic rams don't. 🙂
48 |
I recently purchased some low-cost DDR5 SO-DIMMs, and each DRAM chip on it holds 16Gb. That's 16,777,216 times what the Intel's original 1kb DRAM chip held. In fact, the newer chip actually holds more bits for on-die ECC. That's close to 19 million times the capacity in these tiny button sized things! Crazy!!
36 |
Loved this - as a memory R&D engineer, it’s interesting to see how they addressed past scaling concerns and how we continue to have scaling challenges as well - especially with those pesky capacitors!
19 |
It's Muons, not Alpha particles swirling 12:01 around in huge numbers.
Having done NIR single photon spectroscooy using early CCDs with 12um CCD structures almost 30 years, ago. It was only possible by applying some rigid statistics. Eventhough, Muons caused a huge number of bit flips, which ruined many measures.
Frankly, I wonder how they manage to make chips work since then.
I.e., there must be a insame amount of error correction going on in chips, because Muons statistically often hit multiple neighbouring channels, and cause electron showers.
47 |
Upper limit = tunneling quantum effect
29 |
Just one note: what causes bit flips are not alpha particles, as their decay length in air is just a few centimeters, and so those produced by cosmic rays never reach the surface of Earth, but rather muons.
17 |
I know it's a colloquial thing, and language accent can also affect pronunciation.. But every time he said "dhrahm" as a single word, my brain misfired
Been in the IT industry since the mid/late-90s and I can't recall ever hearing it pronounced any way other than "Dee. Ram.", two separate words. In the beginning of this video he pronounces "S-RAM" that way; "S. Ram." Wonder if it's just a reading-while-exhausted on the 5th-take, kind of thing?
The amount of work put into these pods/talks HAS to be incredible, even if only considering the time spent on research.
MUCH respect for what you do here bud, truly. Love the show :)
2 |
You're a great storyteller, I thought for sure trench designs would be picked! 😅 Really, you bring out the continual challenges that were not at all obvious how to overcome at the time.
10 |
I really hated the 1103 chip, so many supply voltages and all the row and column pre-charge signals had to be generated externally. What a pain!
4 |
I was working with C1103s on video memory boards in 1974 for Computer Optics in CT. What a memory jog! Another great anthology, thanks!
1 |
I was in Dram manufacturing industry in early 2000 and you are quite accurate about the structures. But i had left the industry for more than 10 years. The last manufacturing process i recall was HSG trench (vertical above gate on ILD).
3 |
I still can't get over how he says SRAM correctly yet pronounces DRAM as one word 😭
238 |
Every presentation on this channel is nothing short of excellent.
If YouTube has recommended this channel to you, you likely have excellent tastes.
22 |
great informative and well researched video! As always! You do an amazing job of explaining the details!
|
This documentary is your best work by far ❤
Fusion of electron microscope images and explanation is something else, I’m learning physics more than business
|
Again and again a fine Mix of complex interesting Themes "easy" presented
Respect for the weekly Perfomance !
Thanks !
|
Instead of going through all this trouble , they should have downloaded more RAM .
1 |
@ltrono
4 months ago
They tend to do the crazy stuff first with memory. The fact that it is generally an array of small circuits makes things a bit easier than more complex circuits like the SOC. FLASH is another quite interesting area.
96 |