The world's cleanest railway 

two days ago? this just came out tho

@@Sazoji Every video is the same, he posts the videos to youtube before they come out and schedules the release so the video is fully processed by the time it releases

alright scott

At 3:30 you called this a funicular, as a funicular enjoyer I found this weird, as far as I can see there is only one "cabin". and it's not going up or down, either I missed something or you misspoke, it can happen to the best of us. Great video as always! Also, I listened to the podcast, good job, fun and interesting!

mark rober? colour the spectrum mark rober???? kinds disappointed :/

He has said that his backup plan if youtube didn't work out was to become a train driver

Tom is an infrastructure enthusiast

yes, but the monorail enthusiasts are still mad about him

this further explains the dream I had in which Tom Scott was run over by a train

Ayyyy! nothin wrong with that, plenty of room on this train if infrustructure fascination :D

That's why he became a teacher then, where his mistakes won't matter that much anymore.

Ouch...

@@lonestarr1490 he was actually a former marine and a fantastic teacher.

I work in a cleanroom where we make medication, and that happens far more often than you'd think. Last time it was someone from QA who just *walked out the emergency exit*.

Depends on the level of the cleanroom but at minimum it will take several hours to wait for the air change, verify the indoor air, sanitize the equipment and then reverify the air quality. And usually you need a special QC team to take samples.

Isn't it (technically) a funiculaire though? (Is a funiculaire a train? A funiculaire runs on rails and is pulled by cables...)

Sorry to burst your bubble, but this is not a train but a single pod shuttle on some type of track. ;) But dont let Elon hear that.

​@@theskilllessgamer5795the hyper pod shuttle is an innovative idea by elongated musket to sink investor's money.

​@@user-jk2zm7uq5swell there is only planes, trains, and automobiles. It doesn't fly, and I can't drive it in the road. So it MUST be a train.

@@SECONDQUEST What about boats?

104 meters by 105 meters.

Or 100m × 110m (easier)

@@dani33300 or 2x5000 metres (narrower)

@@alberthusby113 or a circle with diameter 118.35 meters I shall go tie my shoes in the corner.

​@@trist308 What corner, you built a circle, they don't have corners 😂

The building itself is normal industrial concrete. As you wrote: it is then coated with some kind of resin. Then another wall is built on the inside from lightweight aluminium panels. The floors are raised and have holes, so the air can go from the top of the building to the bottom in an almost laminar flow. On the inside there is no wood, no exposed concrete, nothing that can shed particles - just plastic and metal. The top floor or ceiling contains the filters, then the machine floor (usually level 3), then clean chemical supply, then general supply - cleanliness decreases from top to bottom. Going from standard industrial concrete building to clean room takes a few months.

@@KonradTheWizzard Not always the case. You have described what an ISO 5 cleanroom would be, with technical flooring system. But not always needs to be this specific, nor does it have to be such a clean enviroment. Depends on the needs of the customer. But to sum up: -Usually built with sandwich panels, coated steel or fenolic resin with insulating material or structure inside. -PVC or resin flooring (Unless technical flooring is used). -At least 1 Air Handling Unit with at least 2-3 filters on the machine, if required terminal filtering would be installed on the room. -No sharp corners are allowed, as they tend to build dirtyness. -Doors are usually made from the same material as the walls. Just some quick hints of the needs, but depending on the use, different international rules must be followed, in order to be able to produce.

My experience with university cleanrooms is that they're built as a plastic room within a room. All walls and floors are wipe-clean plastic or PVC. Getting non-shedding ceiling tiles is, apparently, a nightmare and they're nightmarishly expensive. What's also very important is to reduce corners for dust to accumulate in as much as possible - I worked in a cleanroom where the floor curved up into the walls. Figuring out an air current is important too: Tom mentioned that the cleanroom at CEA was at positive pressure but I suspect it (like the one I worked in) has the highest pressure in the cleanest zone (e.g. a photolithography room), working down to the 'grey room' spaces, flushing out dust as it goes. Grey rooms are places like the changing room which have the same walls/floors/ceiling as the main cleanroom but have no active clean air supply, relying solely on the passive flow of clean air from the cleanroom down to atmospheric pressure outside. I loved the room outside the changing room because the air felt nearly as clean as the cleanroom, but you didn't have to gown up. Temperature and humidity control is also super-important. The chemistry for semiconductor fabrication - particularly photolithography - can be extremely sensitive to temperature and humidity. If you're the lab manager, expect people to come to you asking 'can we turn the temperature in the cleanroom up/down?', to which the answer is always 'no, unless you fancy redoing every process recipe that's ever been done in there'. We had a problem with one of the air handling units, so spring and autumn usually involved crazy temperature swings and photolithography steps having to be repeated a few times before you got the definition you needed. Proper design and management makes a big difference for user experience.

@@Gunachov Thanks for the clarification. I have only worked in ISO 4 and 5 rooms and I'm not an expert in keeping them clean - I test and automate the machines in there.

@@Gunachov just wondering, we hear a lot about microplastics and how they're everywhere. is there no concern that the plastic in the clean room will "give off" microplastics? or is it expected that any microplastics would be dealt with via the circulation and filters and such.

Oh, and it looks like they get windows as well, deluxe!!

Just curious, how long is the corridor at TSMC?

Although apparently you _can_ make a clean room out of glass as the people mover cabin demonstrates, so wouldn't that have made for a nicer corridor?

@@unvergebeneid A handful of glass panels is easy to maintain and check seals on, a 1/4km of various windows and glass would be a lot harder to find leaks and troubleshoot.

@@unvergebeneid Cheaper and easier to make it from concrete and laminated boards, rather than run the risk of glass breakage closing the facility, and not having any windows also keeps heat loss and solar gain from making the air handling in the corridor have to run with a flow that will mean particles are lifted up off the ground. You want the air to come in the top at the right temperature, humidity and cleanliness, and flow down in a laminar slow flow to the floor, where it leaves via filtered ducts to be treated again. Glass will mean having to either make it triple insulated, with heavy filtering on it, and vacuum isolation of the panels, and also need much more cleaning to be done on the outside and inside to keep it clean. A small glass clean room, with a battery powered air handler, that only has to do circulation for 2 minutes in transit, before the air is handled by the main systems each end, is a lot cheaper, in that you only have to filter the air 3 or 4 times in the run, and not actually do anything else to it. The terminals can automatically connect to replace the air when stopped, and charge the small batteries that do circulation and light.

Selective attention makes few people notice, at least.

I think it still works since we have no idea what we're looking at, and need a couple of moments to register it

@@_Jessyeah I was tripped out by the moving box till he said that’s what it was

Looks like he's cotaining his smile when the car shows up too, right? Probably because the plan was to time it right, and he missed it. Plus if he was a bit more late, the car would be out of frame by the time he mentioned it.

Moving a compass strikes again.

it's the small details like this that show the value of "quality over quantity". i best most people won't notice this detail that you did - but if the blur moved over Tom, then people would definitely notice

0:25

Isn't it just camera focus? (Tom being in the foreground is sharp, and the cars being in the background are not as sharp?)

@@Tahgtahv The license plates on the cars in the background are blurred - if you look you can see the edges of the box they drew around the plates. It was done to protect the owners of those cars, so you couldn’t look up who they were. Definitely intentional.

Funny I did my M1 in Phelma with many of my classes on minatec and I don't know about this shuttle/train...

*(inhales)* NEEEEEEEEEEEEEERD

​@@gamechip06 >feels insecure about his intelligence >calls people a nerd yup average youtuber commentor

@@KALE18 I did part of my study in Phelma too. Except if you visit the CEA, otherwise it is quite unknown. :)

@@mastershooter64 no, I don't need anyone else to tell me I'm stupid, I already know that, but look at this guy; he is textbook.

working in a clean room needs a special kind of people. Some jobs require highest attention, care and alertness, while others are literately perfect for people that are stoned, because the work required is slow and monotonous.

eww

Me with allergy problems: I don't think I can do this

@@prometheus7387 I don’t think there’s anything you can be allergic to in the air of those rooms

Do you have to have a degree to work in a clean room?

the fab I work at has brush wheels you need to use to clean off your shoes before donning your gear, and sticky pad in the one area that I know of where you don't wear shoe coverings.

We have one in the controlled plant science lab for pollen and seeds

we have those, but our cleanroom still lets us wear our own pants under our labcoats (coats, not overalls)... we only work in fume hoods though

As a railway enthusiast enthusiast, I am very happy for you :)

@@hanswoast7 As a railway enthusiast enthusiast enthusiast, I am extremely happy for you and wish you the best :))

​@@Ikram232 As a normal person I am very happy for the tree of you for being happy :D

​@@lukasvondaheim :D

@@Ikram232 As a railway enthusiast enthusiast enthusiast enthusiast, I am exceptionally happy for you.

Going to bet the washing has special detergents, and low doses as well, along with some serious water treatments. Likely also no ironing either, and no softeners at all.

@@SeanBZA spot on, the only problem with dealing with washable bunny suit is that the fabric near the button tent to tear up when undergoing the washing process

I wonder if it would make sense to ditch any weak points with buttons in favour of a magnetic solution. Akin to a back zipper, one side of the clothing has a magnetic line contained within, while the other side has some fitting metal on the other side. Depending on what is done in the clean rooms, that magnetism might interfere with tested components though, so some amount of further insulation could be required.

We are concerned about different kinds of particles though. In Semi we don't care much about viruses and sterility. We care about stuff that can sit on top of wafers and make transistors go bad.

@@KonradTheWizzard Various dusts and pollens come to mind, not to mention water droplets if the day is particularly misty/muggy out.

I used to work in BSL/CL3 labs (ie the complete reverse of a clean room to keep stuff in rather than out) and experienced touring a ISO7 you clean room guys deserve way more respect as it’s nuts spending hours in them.

@@ashliehiggins Thanks! But you get used to it after about a year. (That, or you'll quit and never look back.)

I'm definitely glad to work in probe so we don't have to deal with all this as well. It's annoying enough having to unsmock just to go in the shop and get parts.

Is brake dust not a concern with the cars inside the clean room?

@@CJT3X You wouldn't find rubber tires that could shed particulates or mechanical braking components which could cause brake dust like that. Wheels would be solid plastic or metal on metal rails and braking components and propulsion would be electromagnetic.

@@coulombicdistortion1814 Metal on metal sheds particles too, especially in curves and switches. I can see it well on tram tracks in the city, there's plenty of metal dust inside the grove.

@@CJT3X He said "wide enough for 2 small cars" not "currently using two small cars with rubber tires".... fkin zoomers...

@@CJT3X I believe the little wafer carrying vehicles are magnet powered.

It's nice to know that those workers got such good perks! A steady supply of teflon, any time of day or night. Yum!

Incredibly, it's usually either him alone or him and one guy. When he's alone, he asks someone on location to hold the camera. I'm guessing he's mastered the art of helping random people frame him right. Either that or he shoots slightly wider and then crops in the right frame in post.

Air Hockey sled? There must be ways to accommodate.

Although as this is in France, I might expect Tim Traveler to beat him to it :)

I am curious which of the two stations is used less.

@@timothymclean The one the cleaners are not accessing the carriage from... ;)

@@timothymclean When you've only got two stations, it would be impossible to use one station without using the other.

I clicked just on the preview, because I was sure that it was made by one of the giant ropeway companies. I agree with you, it would be great if Tom and his team produced more videos on ropeways!

Really? Why have rooms when carriages are so cool?

@@smeeself it be a nightmare installing kitchen and washrooms on small rail car

@@humorss Damn. There goes my dream. I'll have to stick to boats.

I would prefer a slide between rooms, but to each their own.

Same actually. The "Seal together to have the pocket of dirt out of the way" seems like a possible upgrade.

Also thought about it. The issue I see is "how do you move the two doors out of the way?".

I used to install entrances and I only did a few single stop entrances. The Marriott Marquis at the top to the restaurant, for the kitchen and staff, a couple penthouse ones and a private one in a brownstone for a handicapped professor. I almost forgot an odd one in the -6 sublevel at 7wtc.

OR "clean room" protocol is just about keeping the air free of dust and airborne germs, and that stuff off the patient, also germs off anything that touches the patient. Used instruments are assumed to need autoclaving but they don't pollute the air.

I think they've made stuff down to two nm now which is absolutely insane and I can't even fathom how a transitor works on that scale.

At that point it's probably almost entirely automated, just to eliminate the human element (the element most likely to introduce contamination) as much as possible

With regard to the clean room, the requirements should not be much higher, because I think any natural dust is already many times larger than the 10 nm technology mentioned in the video.

The different nm fabrication techniques are actually not really accurately named. The x nm technology of one company can be the equivalent of y nm in another company. But yeah, the requirements get much stricter with each node upgrade

The particulate requirements are about the same. At any scale, a hair or particle of dust will ruin the circuitry below it, whether you're working on a 280nm, 10nm, or 5nm node. The difference is in how complex the etching process is - more advanced and denser processes use higher frequencies of light, and require more consecutive passes, in order to produce smaller structures with a much greater level of precision.

wdym, this is interesting even by itself

all due respect to Tom but I’m watching this vid bc i think a clean railway is interesting

Only Tom could make anything interesting ... he does start with only interesting stuff however ...

he can mane interesting stuff 5x as interesting bc he gives me history of it

@@pvic6959 Not discrediting Tom here, but if anyone's gonna talk about something specific (like this one); telling their history is like a default anyway...

The actual operators will be wearing safety goggles. I'm actually surprised Tom didn't have any.

​@@FogelTheVogel typically there are 3 levels in a clean room. Level one is where just just need the clean clothes. Level 2 is typically the interior corridors in the lab. And Level 3 is the lab it self. Typically you need to go on a sticky may and a air washed every time you go up one step. The train is for sure Level 1.

What do you mean by "eyelashes owner" ? Don't we all own eyelashes after all ? 🤔

@@psirvent8 No.. not koenigseggs owner.

I got to take a tour of the cleanrooms at Infineon in Villach, Austria, and they made my colleague remove her eye makeup before we could enter. And they even had makeup remover fluid ready for their guests. If anyone had worn stick-on eyelashes, they would probably have asked the person to remove it.

It's the second-best way of ending a video, behind actually doing the walk off into the distance.

And the London underground

And the Chicago L

Or Japan.

​@@LHyoutube we mean clean, not on time. railway

well, switzerland would have built a tunnel connecting the two buildings. And the tunnel would be certified to survive a nuclear blast.

No, he had to clean the lens before he could enter the clean room with it. 😛

wow that's actually really interesting!

As most of french Governmental assets. If you want to see a satellite view, use a non NATO source (for example from the russian Yandex )

I feel like an emergency exit being openable from the inside no matter what is a good rule. Though maybe have a sign warning people that it's for emergencies only xd

i dont know what you mean, i work in a cleanroom in europe and of course we have the same firesafety as other workplaces

@@l.h.9747 I think the guy was south American

@@superslimanoniem4712 In Europe those doors usually have those green boxes underneath the handle and a big red sign that you will hear a very loud alarm noise if you move the box to get to the handle. It's usually enough to keep you from experimenting with those doors.

I like authentic Tom.

His videos are very carefully made. I doubt he just forgot.

So it's not a gadgetbahn. It's actually the simplest solution to the problem.

Even ones that are mounted on trucks, for specialty transport. Some can even be sent as air cargo, fitting into the standard air cargo footprint, though those tend to not run on commercial flights. Quite a few do exist as full size extra height containers as well.

well. there is still the ISS, the moon, ....

No, I think there is at least one more interesting thing TS will not get around to. Don't know what it is, but at least one more thing

Who knows, he probably did ! Hope he did. I don't think we'll get a video about them, beyond looking cool they're nothing exceptional from an engineering standpoint, but I hope that Tom and the team took the time to take them while they were in town !

[... products you buy don't just appear on the shelf overnight.] Some take several days as evidenced by the dust-on-top 😄