Circuit Board Info I Did Not Know

How often have you looked at a circuit board and just took for granted how it was manufactured?
I saw on a website where you can have made to order stencils for your own printed circuit design if you make your own product line of goods that need circuit boards.
And that made me start thinking about just how many different items have printed circuit boards to make them operate.
And another thing I did not know about the printed designs is that they are oven dried after being printed.
Hey...the oven that dries the printed circuit boards has a printed circuit board in it!
I have seen specials on television where they show you how things are made, but I only remember the soldering of the parts on a circuit board.
I really need to pay more attention to these shows so I don't miss important information.
The website I looked at had all kinds of interesting info on circuit boards, products and designs to make them, shipping info, time line of product production to be sent out to the customer and really if you get a chance you should take a look at the website to see all this stuff I am talking about.