Row 14

All life on Earth, including humans, is carbon based.

Carbon is in the 14th row of the periodic table of elements and thus has 4 valence bonds (it's outer ring of electrons has 4 spots filled and the other 4 spots open).

Semiconductors are typically made out of silicon which is also in the 14th row and thus has similar chemical properties to carbon. Other semiconductor materials such as gallium arsenide and indium phosphide are made up of elements in other rows that combine to act like row 14 elements (the two examples are combinations of rows 13 and 15). Sometimes germanium is added to silicon which works out since germanium is also in row 14. There are plenty of other crazy combinations of elements used in semiconductors, but those are the major ones used for integrated circuits.

So both life and semiconductors are based on row 14 elements and thus are both based on similar chemistry. Kinda cool.

Yes, I realize that lots of people have proposed the idea that we could find silicon based life on other planets, although that usually refers to finding something animal like, just based on silicon chains rather than carbon chains. What struck me was the similarity between semiconductors and humans. But that's about as far as I've gotten with that thought.