Development of Secondary Ion Mass Spectrometer

Development of the AES-IMA Device and its Application to Solid Surfaces(1)

Abstract

A combination system of SEM, AES and IMA are developed in one apparatus as a AES-IMA development(AID). A secondary ion mass spectrometer(SIMS)in the AID is a new type analyzer which is composed of an ion extractor system, a new stigmaticsecond order double focusing mass spectrometer and an electric spherical sector. Methods to increase the transmission of secondary ions, to reduce the background noise of the SIMS and to make the resolving power of the SIMS higher are investigated. This apparatus is applied to silicon device analysis, i. e. silicon single crystal doped boron, arsenic or antimony, LSI and IC.Mass spectra of silicon device and Auger spectra of aluminum and silicon are obtained simultaneous using of9keV argon ion and9keV electron microprobes, the ion microprobe and the electron microprobe. A surface of LSI device is observed as scanning electron microscopic, scanning ion microscopic and specific ion images. A confirmation of area bombarded by ion and a selection of area to be analyzed are proceeded with SEM.