… Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics. …
Explanatory notes
… 38.18 ‑ Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; … (1) The chemical elements of Chapter 28 (for example, silicon and selenium) doped with, for example, boron or phosphorus, generally in a proportion of the order of one part per million, provided they are in the form of …