eric-hu

Joined 15 years ago

Karma
1,747
Submissions
894
Member since
Jun 30
hu dot eric at that google email service
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Recent submissions

Comment · 1 month ago
> It's in the EU's interest to fabricate chips locally.

Is it though? I'd put forward that it's in the EU's interest to foster good international relationships. Countries can get away without domestic strategic industries if they can play nice with others.

Comment · 1 month ago
Large shopping malls would fail the air purity requirements for semiconductor manufacturing.

EUV lithography and etching rooms require ISO class 1 clean rooms. Those can have a maximum of 10 particles of size 0.1 microns per cubic meter.

While a shopping mall can get away with 2 - 4 air changes per hour, an ISO class 1 clean room requires 400-600 an hour, or about 10 a minute. Airflow needs to also be controlled: vertical and laminar. Every human entering the cleanroom needs to undergo an air shower with speeds of 60-90 mph to shear off loose skin flakes, hair and lint. This area needs to maintain constant positive air pressure to repel outside dust as humans move in and out.

In the EUV lithography systems, temperature control is measured in milliKelvins (0.001 C). If a wafer stage has a temperature variation of 0.05 C, the silicon expands by a few nanometers and the multimillion dollar batch is toast. Meanwhile in the same room, the EUV machine is generating extreme ultraviolet light using a plasma light source that gets to above 200,000 C. That's 40x hotter than the surface of the sun.

> I always thought of these as high-precision, not-too-high-volume processes

EUV rooms are churning out about 150 wafers an hour, 24/7. That sounds like not too high of a volume, but each wafer is about 500 cpus. So 75,000 cpus an hour.

Comment · 1 month ago
Adding on to your point about attrition: if internal promotions in engineering are decided by your ability to be a force multiplier, to facilitate cross team collaboration, mentor and help others to skill up, how do any currently employed engineers demonstrate that with no one new to mentor or train? How do you collaborate when teammates work with AI tools more and coworkers less? Would they just have an easier time getting into a higher responsibility role looking elsewhere?
Comment · 1 year ago
Which cloud provider came out on top?
Comment · 1 year ago
Thank you for sharing your experience!

This is something I’ve been curious about. Can you speak more about how you got into it? What kind of research did you do before getting started? Did you know anyone else who had done it before you got into it?

Comment · 1 year ago
Don’t forget the Touch Bars.
Comment · 1 year ago
As long as you're dreaming, perhaps you should also include giving up all his equity in the company. He'd still profit handsomely off someone else running the company well with over 12% of shares.
Comment · 1 year ago
I wouldn't be surprised if you were correct in your belief and that this became a case of Goodhart's Law when implemented in the egg industry.
Comment · 1 year ago
Where do we find an honorable captain in this day and age? And how do we get them into the captain's seat?
Comment · 1 year ago
While I align with your views on this matter, talking to people this way is how you drive them to entrench in the opposite view.
Comment · 1 year ago
This sounds like a complex procedure. Are there currently alternative packaging facilities that could do this work, if Taiwan were locked into kinetic war?
Comment · 1 year ago
Those numbers match what comes up with a quick search:

https://www.extension.iastate.edu/grain/topics/EstimatesofTo...

That study uses 1,043.4 mpg for the fuel economy of a 100,000 dwt ship.

Videos of transportation ship engines are cool. Each cylinder is wide enough for a person to lay down inside it.

https://youtu.be/G0eMyA388bE

Comment · 1 year ago
> I don't think we're near AGI, well any reasonable definition of it.

But wait just hear me out for a second! What if we've also sufficiently lowered the definition of "GI" at the same time...

Comment · 1 year ago
Grew up in LA. I don't recall wildfires in the winter, generally. There were Santa Ana Winds this past week though, and I'm pretty sure that's the cause. In the mountains near me, wind speeds were said to be 80-100 mph. They were probably lower where I am, but my neighbor's backyard canopy blew over the wall to my backyard. I helped them hoist it back over the wall today and we estimated it was about 100 lbs.

These are gusty and dry winds coming from the desert, so I assume these fires spread from some manmade source.

> Does this suggest even bigger fires are to be expected in the summer this year when it is actually hot?

I would assume so, yes. Some insurers have been pulling out of CA in 2024.

Comment · 1 year ago
This is a more recent feature. I’m not sure if such granular permissions were in macOS back in 2020 when this blog post was written.

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