AT&T Archives: Dr. Walter Brattain on Semiconductor Physics (Bonus Edition) 

College courses of semiconductor physics usually starts from Band-diagram or Fermi-energy, which confuses students. These concepts were not mentioned in the lecture at all. The lecture starts with demonstrating physical phenomena. Physics starts from explaining physical phenomena. The applications of semiconductor devices are their physical phenomena, e.g. amplifying signal, computing, energy harvesting, light-emitting.

This lecture apparently also covered the early LED (at 29:40).

I wish I had watched this video before taking my semiconductor course. It is Worth of gold.

Brilliant. A treasure. Thank you AT&T. More please.

I'd never heard it explained so well before.

This is gold. 😍

Thank You AT&T.

Thank you for preserving these amazing films!

great people......great work

Absolutely remarkable knowledge, thankyou AT&T

Thank you so much for this video.

The impact... he couldn’t imagine the vast impact of the transistor...

Thank you !

one of the best

Note at 23:35 how important the domain of purity is. The substrate material needed to be over 1,000 -10,000 times more pure than chemical purity before real progress in electronics could be made.

Excellent, thanks. He was a top notch experimental physicist. My idol.

The entire information age of mankind... in one lecture

Ok that was awesome. I was surprised to see him working with germanium as well as silicon. That was some great science!

Yes. Physical extremes. Temp,pressure,velocity, characteristics of elements.

I LOVE AT&T

A wooden laser pointer! How ingenious!

What was the "transparent" material? Good lecture!

Very interesting.

After 20 years of study, I finally understand this !! No wonder they are called holes!! And I see now obviously why the semiconductors act this way! It is incredible. I had a similar problem studying integrals in college, never knew what they were until I told an electronics engineer about my problem and he stated in one sentence what an integer was and I understood it. Why can't colleges tell us the real information quickly and simply? Do they gain something from turning out graduates who still don't know what it was they were studying (even if they can make the equations balance out on their tests).

I feel it like real physics!☺😇

29:41 I didn't realise the first LED existed in 1959! I thought the first LED was an IR LED made in the 60's.

Wow!

I can't understand what he is saying at 5:26: Beginning at 5:22, he says, "... the contacts to them sometimes pass current in one direction banananother." Is he saying, "but not another" ...? (This is what I'm guessing from the demo.) So I listened on to see if he would restate it in another way, when, at 5:32, he gets to, "... One contact has these properties. The other contact izzomie." Can anybody clear this up? I get the idea from the demo, but still.... Thanks.

what does he say at min 30:15? "The most important thing is..." WHAAAAAAAAAAAAAAAAAAAAAAAAAAAAT

29:40 LED light existed in the 1950s ! . In 60s called Elecroluminescent Diode

Notice 27:40, the proper use of quantum as something small, not like today's quantum leap. However, 'quantum leap' is not wrong if one understands that in the continuum, changes are infinitely infinitesimal, therefore, even a small quanta in relatively huge.

Interessante filmato, soprattutto per la scoperta dei diodi LED ultima parte del filmato costruiti oggi con silicio, germani, selenio, arsenico, gallio, stronzio, alluminio e oro. Nel 1977 a 12 anni d'età ho scoperto un effetto molto più luminoso dei LED in commercio di quel periodo usando per gioco un diodo a baffo di gatto germanio e tungsteno da un kit radio onde medie che stavo studiando. Ho preso tale diodo senza resistore limitatore di corrente e lo alimentato a 9V-10V in corrente continua direttamente ne suo senso di conduzione un bel corto circuito e girato invece inversamente si illuminato di una luce bianchissima, il diodo è il OA85, lo fatto pure vedere a mio caro padre. Nei studi conseguiti poi di radio tecnica e tv soprattutto nello studio dei semiconduttori diodi e transistors e la loro costruzione sia drogati e a punte metalliche di contatto sul semiconduttore di tipo n o p costruito in MS, quella connessione elettronica la si può considerare effetto del fisico ZENER effetto tunnel o a valanga.

This guy and Bardeen together invented transistor in Bell labs.

25:00

30:15 what is important to learn is....... we never know they cut it out, why at&t for god love why???????????!!!!!!!!!!!!!!!

My uncle on the (P)hilips side, worked in this area prototyping for the President of Bell & others,I guess you could say, to become very close, other side (M)iles then in UFO Pittsburgh. (Veeerrry Innnnteresting Folllowings)

That man in the red shirt, has a fabulous lisp

i had a idea for a photovoltaic telescope? i wondered if it was possible to get electricity from a distant star at nighttime? 🤔🔭 🤷‍♂️

Why is it that everyone in the 50's and 60's said, " uh TALL" instead of , "at all?"

#lostmestartingrightaround18:00

"these vacant positions are called holes" lol.

I often hear/read about the "discovery" of the transistor. Wasn't it an invention?

God is speaking.

I call them sinks😅

Am I the only one here that thinks this dude sounds like Droopy Dog? 🤔

Thank you AT& T .

great people......great work

Thank you!

Very few demonstrations directly affect everyone watching .