undoped
Lacking foreign atoms
Undoped describes a material, especially a semiconductor, that has not been doped—that is, no impurities have been intentionally added to alter its electrical properties.
Pure silicon before processing is undoped.
The term also appears in sports contexts, describing athletes or competitions free from performance-enhancing drugs: an undoped Tour de France.
Unmixed, without impurities
- unadulteratedCompletely unmixed, genuine
- unalteredNot modified whatsoever
- pristinePure and untouched
- virginOne sexually inexperienced
untreated · unmodified · native · original · intrinsic · clean · unprocessed · natural
Belonging by nature
- siliconMetalloid in electronics
- germaniumAtomic number thirty-two
- substrateUnderlying supporting material
- crystalOrdered-atom solid
lattice · valence · conductivity · electrons · holes · solid-state · wafer · microelectronics
pure
Unmixed, without impurities
- unadulteratedCompletely unmixed, genuine
- unalteredNot modified whatsoever
- pristinePure and untouched
virgin · untreated · unmodified · native · original · intrinsic · clean · unprocessed · natural · elemental
intrinsic
Belonging by nature
- siliconMetalloid in electronics
- germaniumAtomic number thirty-two
- substrateUnderlying supporting material
crystal · lattice · valence · conductivity · electrons · holes · solid-state · wafer · microelectronics · transistor