Ceramic pieces are generally made through extrusion, slip casting, or compression molding. A polymer may have one type of repeating unit of many different types of repeating units. Polymers are usually carbon based. Polyethylene is a long chain of carbons bonded together in a straight line. Hydrogen atoms are bonded to the rest of the sites.
ABA is a copolymer with different repeating units.
Polymers are used for a large variety of items. Trash bags, pot holders, wire insulation, computer chips, packing materials, car doors, and many other items are all made of polymers. Polymers can be made into products by injection molding, extrusion, pressing, blow molding, stamping or machining. Diodes, transistors, solar cells and opto-electrical devices are all devices that can be made out of semiconductors. Processing of semiconductors is a complicated multi-step process.