You know about computers, right? When they make Integrated Circuits, why do they wrap them in plastic/ceramic/other and connect them to everything else with pins and stuff? Seems inefficient to me. Why can't they just print them in silicon directly onto the surface of the Printed Circuit Board? I suppose giving them a case provides them with some protection, but couldn't they do that another way for the whole board instead, like by, I don't know, laminating it very thickly?