Browse Prior Art Database

Spacer Distribution Control Method

IP.com Disclosure Number: IPCOM000105868D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Suzuki, S: AUTHOR [+2]

Abstract

Disclosed herein is a method of splaying "dry spacer" on the glass substrate in liquid crystal (LC) panel fabrication, which can control the density and distribution of the spacer dynamically by electrically controlling the spacer's movement without spacer weight adjustment.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 67% of the total text.

Spacer Distribution Control Method

      Disclosed herein is a method of splaying "dry spacer" on the
glass substrate in liquid crystal (LC) panel fabrication, which can
control the density and distribution of the spacer dynamically by
electrically controlling the spacer's movement without spacer weight
adjustment.

      With the usual "dry spacer" method, the density of spacers on
the glass is determined only by the weight of the spacers and the
desirable distribution can not be acquired because of splaying the
constant volume of spacers using electrification of the spacer
itself.  This method has the shortcomings of spacer density
uncontrollability by its closed system usage.  That is, the spacer
density is only changed by the weight change of the spacers before
splay, which means weighting spacers should be made again and
counting spacers before the splaying process.  So the machine itself
must be tuned again; it is very difficult work and time consuming in
cell in-line fabrication.

      The disclosed new method is shown in the Figure, which
dynamically controls the spacer density by an outer control system of
a spacer splayer 1 with a spacer counting unit to monitor the density
and distribution.  The disclosed system has an upper control grid
(metal mesh) 2 between the glass substrate 3 and the splayer nozzle
4, which is electrically controlled to optimize the spacer density,
and a lower control grid 5, which is mechanically moved (x-y-z
direction) by...