strength at twe Lc ! subst ・ ate interfaces was investigated by linear stability analysis ・similarity in stability characteristics between the lPS mode and the surface sta 漁 zed 蛋 erroelectric mode was c且 a 雌 ed . The analysis showed that , with parallel rubbing of the twe substrate surfaces , nly the ( symmetric ) switching initialized frorn the center of the liquid − crystal layer will occur even with the asy rnetric surface conditien . 1。 緒 言