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Elastomeric replicas of surface relief structures were prepared by molding poly(dimethylsiloxane) (PDMS)precursors against photo-inscribed surface-relief-gratings on azo polymer films.The PI solutions were micro-contact printed with the elastomeric PDMS replica on quartz slides.Good surface-relief-grating structures were formed on the quartz slides.The quartz slides covered with surface-reliefgrating polymide (PI) films were then assembled into liquid crystal (LC) cells.The transmittance passing through the cell between crossed polarizers changed periodically with a regular 90°separation of the rotational angle.The pretilt angle of the cell was found to be 2.8°.Results showed that the PI films with surface-relief-grating structures by this micro-contact printing process have good liquid crystal alignment ability.This preparation method of alignment layers can be considered a potentially useful technique in the LC display (LCD)industry in the future.