Method of making accurate dimension alignment film for LCD

Claim 1

A method of making alignment layers with accurate dimensions in a liquid crystal display (LCD) cell having two transparent substrates, one containing thin film transistors (TFT) and another containing color filters (CF), liquid crystal mixture between said substrates, spacers for maintaining the gap between said substrates, an alignment layer inside each one of said substrates, and a seal band for sealing the periphery of said substrates, comprising the steps of: depositing a transparent electrically conductive electrode on each one of said substrates, coating a layer of alignment film on the surface of each one of said substrates, curing said alignment film, rubbing said alignment film in a desired desirable direction, then ablating the alignment film selectively to remove the alignment film where said sealing band is to be located, dispersing said spacers onto the surface of a first one of the two transparent substrates, screen printing a sealant onto the ablated surface of a second one of the two transparent substrates to form said sealing band, aligning the said substrates, filling the space between said substrates with said liquid crystal mixture by injecting through an injection hole, and sealing said liquid crystal cell by curing said sealant.

Claim 2

A method of making alignment layers with accurate dimensions in a liquid crystal display (LCD) cell having two transparent substrates, one containing thin film transistors (TFT) and another containing color filters (CF), liquid crystal mixture between said substrates, spacers for maintaining the gap between said substrates, an alignment layer inside each one of said substrates, and a seal band for sealing the periphery of said substrates, comprising the steps of: depositing a transparent electrically conductive electrode on each one of said substrates, coating a layer of alignment film on the surface of each one of said substrates, curing said alignment film, rubbing said alignment film in a desired desirable direction, then ablating the alignment film selectively to remove the alignment film where said sealing band is to be located, dispersing said spacers onto the surface of a first one of the two transparent substrates, screen printing a sealant onto the ablated surface of a second one of the two transparent substrates to form said sealing band, aligning the said substrates, filling the space between said substrates with said liquid crystal mixture by injecting through an injection hole, and sealing said liquid crystal cell by curing said sealant.