Browse Prior Art Database

Organic Resin Structure in Liquid Crystal Cell for Cell Thickness Control

IP.com Disclosure Number: IPCOM000119152D
Original Publication Date: 1997-Dec-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Suzuki, S: AUTHOR

Abstract

Disclosed is an organic resin structure on a Thin Film Transistor (TFT) substrate, for which its purpose is cell gap control. On the perimeter structure of a TFT array, organic resin wall (or column) is fabricated to prevent overlap with the surrounding seal. The black-resin-wall can function as a light shield. This structure is very useful in cell gap uniformity around the pixel area and prevention of a seal process error.

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Organic Resin Structure in Liquid Crystal Cell for Cell Thickness
Control

      Disclosed is an organic resin structure on a Thin Film
Transistor (TFT) substrate, for which its purpose is cell gap
control.  On the perimeter structure of a TFT array, organic resin
wall (or column) is fabricated to prevent overlap with the
surrounding seal.  The black-resin-wall can function as a light
shield.  This structure is very useful in cell gap uniformity around
the pixel area and prevention of a seal process error.

      Figs. 1, 2, and 3 show the perimeter structures with
variations.  As shown in Fig. 1, the cell is configured of a Color
Filter (CF) substrate (1), TFT substrate (2), surrounding seal (3),
organic resin wall (4), spacer ball (5), metal lead (data line or
gate line) (6), metal black matrix on CF side (7), and optionally
organic resin column on the pixel area (8).  The spacing (L) between
the surrounding seal (usually epoxy resin) and organic resin wall
(function as black mask) is set to nearly zero, as shown in Fig. 1.
Fig. 2 shows an example of an organic resin wall on the CF side.  The
organic resin wall can be fabricated by black resin of the CF
itself.  Fig. 3 shows the hybrid of an organic resin wall, which is
located on both the CF and TFT substrate.  With these structures, the
seal error, such as pealing off or invasion into a pixel area, can be
prevented.  In addition, the spacing between CF substrate and TFT
substrate is retained equal in the...