I saw some new that number of company is trying to use metal intead of silion.However, But by this Article, It seem impossible.

They can't use just any old metal instead of silicon with the same design. Metal is a conductor. silicon is a semi conductor which can be chemically doped to get different effects.

I am a physics student from Austria (Europe) and recognized, that you left out a few things in your article. I dont know if you did this because you forgot it, dont know it or didnt want to confuse the readers.

You wrote, that because of the Pauli Exclusion Principle two electrons cannot exist at the same time in the same space. This is not completly true, because the Pauli Exclusion Principle says that this is possible, if the two electrons have a different spin. Because electrons can have a spin of +1/2 or -1/2, that means that not more then two electrons can exist in one orbit.

What you also forgot to mention is, that you dont know the exact position and speed of a particle at the same time because of Heisenbergs Uncertainty Principle. In the case of an electron in an orbit you only know, that with a propability of 90% the electron is in a space called orbit. You dont know, where in that orbit it is. If it is not there, it can be anywhere.

Thanks for your comments.

Regarding metal transistors - there are no entirely metal transistors, pre se. However, *parts* of transistors are made of metal, and yes, a great amount of research does go into what metals can be used, and how to manipulate their properties. The article you read may have been talking specifically about the metal *parts* of a transistor, not an entirely metal transistor (which does not exist .. at least not yet!).

Regarding the Spin Quantum Number and Heisenberg's Uncertainty Principle, yes, you're exactly correct on both accounts, and yes, they were both left out intentionally. Talk about Spin Number and it brings about the whole matter of orbitals, and there's no need to open that door. Heisenberg is even worse! Suffice it to say that the electron *probably* exists *somewhere* in the orbit with *some* momentum. We won't try to be any more precise than that. I won't talk about probability waves if you don't.

They're not Crucial to a basic understanding of the concepts, and I felt those particular concepts would only confuse the reader. There are about 100 million other 'omissions' throughout the article and series as well (and, indeed, throughout our own elementary understanding of quantum physics) .. I could never hope to cover everything, so we'll just shoot for the important stuff.

Part 2 is up, if you're interested.