Semiconductor processing are an example in inorganic chemistry where everything remains to discover, because
- People are interested in the surfaces rather than the volume
- Reactants and products must generally be gaseous
- The means are exotic: plasma, sputtering, single-layer epitaxy, atomic layer deposition...
- The necessary purity is unknown elsewhere
- The shape, the anisotropic selectivity matter
- Usually nowhere near equilibrium
- I forget a few more
- Processes evolve so quickly that one has no time for theories
So much exotic in fact, that process developers progress in the dark, alone in the world.
Semiconductor components and materials also make discoveries regularly. One fashionable theme presently is spintronics, where thin films can be ferromagnetic, electrons in semiconductors have their spin oriented, and so on. Supposed to make interesting components some time in the future; makes already read heads for hard disk drives.
New opto, power and GHz semiconductor materials are badly wanted, especially for deep UV Led and lasers, and every progress there is very much a matter of processing, with chemistry in it. Things as simple as: How to have a P dopant in AlN or BxAl1-xN.