摘要
研究了无限的ＮＦ－环及有限的ＮＦ－环，并且给出了有限ＮＦ－环的构造．
An associative ring R is called a NF Ring, if R has no non trivial subring or all the non trivial subrings are fields. In this paper, we discuss the properties of NF Rings, and then the structure of finite NF Rings.
