The localization of the defects in semiconductor devices using a new laser scanning

Laser scanning microscopy has a number of desirable features which makes preferable to electron microscopy for a wide range of applications. The photoresponse properties of semiconductor devices such as p-i-n photodiodes have been investigated for possible use in detecting and locating various defects and also for the detection of resistivity and lifetime inhomogeneities in semiconductor devices. In all scanning techniques the same basic procedure is used. Laser beam is focused to a small spot on the specimen in order to build up an image. >