Integrated circuit internal short circuit failure positioning method based on liquid crystal phase change

The invention discloses an integrated circuit internal short circuit failure lossless positioning method based on liquid crystal phase change. The method comprises the following steps of spraying a liquid crystal solution film on the surface of an integrated circuit chip, adding a polarized light lens at a light outlet of a microscope light source, adding a rotatable polarized light lens at an incident port of an objective lens, adjusting the angle of the objective lens polarized light lens, and conducting fixation when darkest light is observed from the eyepiece, attaching a heating plate tothe upper surface of the microscope objective table, placing the integrated circuit chip on the heating plate on the surface of the microscope objective table, placing the microscope objective table under the irradiation of a microscope polarized light source, and adjusting the microscope to enable a clear image of the integrated circuit chip to be presented in the eyepiece, providing electric signal excitation for the in