STM memory medium

摘要

An STM memory medium comprising a substrate whose surface is smooth or even, a first insulating layer formed at a predetermined depth in the substrate by implanting first ion atoms from the smooth surface of the substrate into it under a certain condition, and a second insulating layer formed adjacent to the first insulating layer and at another predetermined depth in the substrate by implanting second ion atoms from the smooth surface of the substrate into it under another certain condition.