Take Intel, which has been the leading maker of semiconductor chips for decades.
Likewise, the semiconductor industry as we know it today originated in the highly taxed 1970s, not the 1980s.
It may not be the only impurity causing the peculiar behavior of this semiconductor, but it does seem a likely candidate.
Any of various solid substances, such as silicon or germanium, that conduct electricity more easily than insulators but less easily than conductors. In semiconductors, thermal energy is enough to cause a small number of electrons to escape from the valence bonds between the atoms (the valence band); they orbit instead in the higher-energy conduction band, in which they are relatively free. The resulting gaps in the valence band are called holes. Semiconductors are vital to the design of electronic components and circuitry, including transistors, laser diodes, and memory and computer processing circuits.