undoped
adj. 纯的;无掺杂的
例句
It, too, plans to build flat transistors with undoped channels.
它同样计划构造一个无掺杂隧道的平面晶体管。
At least one group of layers of the superlattice may be substantially undoped.
超晶格的至少一个层组可以是基本上未掺杂的。
In concert, the two gates are able to control the undoped channel without its having to be ridiculously thin.
两个门协调一致则能实现对无掺杂隧道的控制,根本不需要那么薄的隧道。