You literally have no clue what you're talking about, do you?
Dielectric is synonymous to insulator. Silicon is a semi-conductor.
Silicon is literally what makes most transistor a transistor. And transistor are what make modern logic circuit perform logic operations. The metal parts are just for passively transporting electrical charges between the active parts. (There are other semi-conductor which would work perfectly fine for that purpose, but silicon is more common.)
The fiberglass board is not silicon, it's fiberglass.... glass is silicon oxide, but that's mostly a coincidence.
A mosfet, the type of transistor most often used in logic circuits, is made of silicon, with various doping elements, covered by an oxide layer on top of which lays a metalic gate. The oxide layer is an insulator that only serves to prevent current from flowing from the gate into the silicon beneath. The presence of charge on the gate changes the electrical property of the sillicon beneath the oxide, switching it from from insulator to conductor depending on the inscribed dopant pattern.
I guess the best way to get to the truth on the internet is still to spew around bullshit, to get someone who knows irritated enough to write something. But geez.. that's all fairly well explained on wikipedia
No, just about everything you said is wrong. Again, a mosfet is mostly silicon.
If you'd just bother looking at the diagram of a field effect transistor you'd realize immediatly how ridiculous that affirmation of yours is.
But there's no point talking to you any further, that is quite clear. Not that I ever thought there was much chance. Anyway, my previous comment wasn't for you, but for everyone else.