Building circuits on a silicon chip is a bit like a game of Tetris — you have to lay down layer after layer of different materials while lining up holes in the existing layers with blocks of … ...

This experiment didn’t test other common etchants like HCl and H202, or cupric chloride (which is is the byproduct of HCl and H202).

Wet etching is a crucial technique in nanotechnology that uses liquid etchants to selectively remove material from substrates, enabling the fabrication of nanowires, nanopatterns, and nanofluidic ...

SEVERAL etchants, usually consisting of aqueous solutions of organic acids, have been shown 1–5 to produce etch pits at the points of emergence of dislocations on the rhombohedral cleavage faces ...