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Browse Prior Art Database

The Control Method for LCD-Cell-Spacer Hardness by Resin

IP.com Disclosure Number: IPCOM000123285D
Original Publication Date: 1998-Aug-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 40K

Publishing Venue

IBM

Related People

Koseki, T: AUTHOR [+2]

Abstract

Disclosed is the method to control the hardness of photosensitive resin for spacer by concentration of filler or pigment in resin.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 69% of the total text.

The Control Method for LCD-Cell-Spacer Hardness by Resin

   Disclosed is the method to control the hardness of
photosensitive resin for spacer by concentration of filler or
pigment in resin.

   The conventional resin material consists of
photo-initiator, monomer, binder and additives for coating and pot
life.  The hardness of the resin stud cannot be changed by process
parameter (ex. exposure energy, bake condition etc.) on stable resin
condition.  So the resin hardness is determined by binder property.

   On the other hand, the control of stud hardness is
important.  Too low hardness makes the problem of stud shrinkage
against external force.  Too high hardness makes the problem
occurrence of bubble in cell because the stud shrinkage cannot follow
the volume shrinkage of liquid crystal by temperature decrease in the
low temperature storage test.  So the resin spacer is required
desirous hardness for panel design.

   To change resin stud hardness is to select the binder
resin in the conventional resin composition.  But selection of binder
resin is carried out not to contaminate the liquid crystal.  The
development of material is difficult to meet the condition of
hardness and material reliability.

   The object of this invention is to provide the resin
material that has desirous resin hardness as spacer of pearl-less LCD
for advantage of the bubble in low temperature and the tolerance to
external force.

   The required spacer hardness is realized by mixing...