The Use of Electron-Beam Lithography for Localized Micro-Beam Irradiations

A controlled microbeam facility based on electron-beam lithography is demonstrated as a means of observing total dose induced compensation effects on circuit parameters and understanding degradation mechanisms. The system uses electron-beam lithography techniques to perform on-chip microbeam irradiations on individual transistors or sub-circuits without any irradiation of the neighboring transistors. An experimental validation of the mechanisms proposed to explain the sensitivity of the input current of the LM139 as an illustration of this technique is provided.