Dye Formulation For Detecting Microcracks In Semiconductor Laminated Films
Original Publication Date: 1979-Jul-01
Included in the Prior Art Database: 2005-Feb-20
It has been found that failure analysis of semiconductor products to determine and detect moisture ingress paths was readily accomplished by a highly penetrant dye. The dye must be chemically inert, highly soluble in water and/or alcohols and with a very low surface tension for capillary penetration of microcracks so that the dye will delineate the moisture penetration path and other defects in the surface. Such a dye can be formulated as follows: 20 parts of a synthetic water-soluble analine dye are mixed with 40 parts of isopropanol alcohol and 40 parts of D.I. water.