LIQUID CRYSTAL DISPLAY ELEMENT HAVING A PRECISELY CONTROLLED CELL GAP AND METHOD OF MAKING SAME

摘要

A liquid crystal display cell (11) having improved cell gap uniformity is made by depositing a plurality of spacer particles (26) on the cell substrate (10) then subjecting the substrate (10) to an external energy source to selectively dislodge and remove the larger particles (24), such as by immersing the substrate (10) in an ultrasonic bath. Because the larger particles (24) will inherently have a lesser attraction to the substrate relative to their mass, subjecting the entire substrate to the ultrasonic bath will inherently preferentially remove the larger particles (24), resulting in a distribution having a smaller standard deviation than the initial mixture of particles deposited on the substrate as well as an asymmetric reduction in the number of gap-dominating large particles (24).