Browse Prior Art Database

Block Seal for Liquid Crystal Material

IP.com Disclosure Number: IPCOM000118635D
Original Publication Date: 1997-Apr-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 4 page(s) / 60K

Publishing Venue

IBM

Related People

Yamamoto, F: AUTHOR

Abstract

Disclosed is a device to prevent the suction of Liquid Crystal (LC) material into the Gap area surrounding the seal and between the Array and Color filter by capillary effect during an LC injection process. This is shown in Fig. 1.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Block Seal for Liquid Crystal Material

      Disclosed is a device to prevent the suction of Liquid Crystal
(LC) material into the Gap area surrounding the seal and between the
Array and Color filter by capillary effect during an LC injection
process.  This is shown in Fig. 1.

      This device is applicable for both a Liquid Crystal Display
(LCD) panel and an LC injection process.  The current LC injection
process consists of Vacuum exhaust and an LC injection by dipping
injection port(s) in an LC boat or contacting injection port(s) to
the surface of an LC in the boat.  This is shown in Fig. 2.  An LC is
injected by a difference of pressure between atmosphere and vacuity.
LC is sucked up into the Gap between an Array.  The Color filter must
be cleaned with an LC cleaning machine containing an ultrasonic wave
in order to avoid corrosion to the Outer Lead Bonding (OLB) electric
leads for Tape Automated Bonding (TAB) soldering.

      This invention tries to provide some seal at the near location
of the LC injection port(s) and on the pass of the LC suction route
with a capillary to block the LC flow.  This is shown in Fig. 3.

Advantages by this device are:
  o  Prevention of corrosion for OLB electric leads by LC
      residue in the Gap
  o  LC consumption saving (around 3 yen/12.1" size cell)
  o  Cost reduction to LC cleaning machine by requirements
      relaxation