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Alignment Layer Fabrication Method using Stamp for Multi-Domain Liquid Crystal Display

IP.com Disclosure Number: IPCOM000116682D
Original Publication Date: 1995-Oct-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Nakayama, K: AUTHOR [+2]

Abstract

Disclosed is a method of the alignment layer fabrication for the multi-domain Liquid Crystal Display (LCD) by using the stamp. Microscopic pattern on the stamp surface gives some alignment patterns on the alignment layer at printing.

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Alignment Layer Fabrication Method using Stamp for Multi-Domain Liquid
Crystal Display

      Disclosed is a method of the alignment layer fabrication for
the multi-domain Liquid Crystal Display (LCD) by using the stamp.
Microscopic pattern on the stamp surface gives some alignment
patterns on the alignment layer at printing.

      In this method, the stamp, which has an microgroove pattern on
the surface (Fig. 1), fabricates an alignment direction on the
alignment layer.  Microgrooves on the stamp are stamped on the glass
of LCD.  Stamped microgroove gives an alignment direction to an
alignment layer.  That also gives an alignment direction and a
pretilt angle to the Liquid Crystal (LC).  Here, pretilt angle is the
elevation angle of LC against the glass surface when no driving
voltage applied.  This alignment direction is given by the rubbing
process today.  Also in this method, the stamp surface has many areas
to fabricate some alignment directions in a pixel area.  Neighbor
patterns have different directions of LC alignment for each other
(Fig. 2)(*).
  Reference
  (*) E. S. Lee, Uniform Alignment of Liquid Crystal Induced by a
       Stamped Surface Morphology and Its Anchoring Energy, Japan
       Display 92, 880 (1992).