Browse Prior Art Database

Fabrication Method for Active Matrix Liquid Crystal Display

IP.com Disclosure Number: IPCOM000110628D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 2 page(s) / 83K

Publishing Venue

IBM

Related People

Suzuki, S: AUTHOR [+2]

Abstract

Disclosed herein is a fabrication method for a liquid crystal (LC) panel where three types or sizes of spacers are used for cell thickness control on the active area of active matrix LCDs. This fabrication method utilizes three different sizes of spacers splayed on glass substrate, which has thin film thickness difference on the glass substrate about 1-2 micron meters. A cell with a controlled gap or thickness is realized by selecting size and type of spacers in accordance with the difference.

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Fabrication Method for Active Matrix Liquid Crystal Display

       Disclosed herein is a fabrication method for a liquid
crystal (LC) panel where three types or sizes of spacers are used for
cell thickness control on the active area of active matrix LCDs.
This fabrication method utilizes three different sizes of spacers
splayed on glass substrate, which has thin film thickness difference
on the glass substrate about 1-2 micron meters.  A cell with a
controlled gap or thickness is realized by selecting size and type of
spacers in accordance with the difference.

      By using this fabrication method for a LC panel, the following
advantages can be obtained:
      1) The cell thickness can be controllable with the election of
spacer types and weight ratio.
      2) Cell gap deviation of LC panel can be minimized.
      3) Cell gap uniformity can be kept even though the glass
substrates shrink or expand as temperature changes.

      In the conventional method, only one type of spacer
(resin-spacer, plastic-spacer, glass-spacer, etc.) is used and the
method causes non-uniformity cell thickness by the spacer density
fluctuation.

      It has been known that two types of spacers are used, such as
plastic spacer and glass fiber, and two different sizes of plastic
spacers.  However, this technology has the following problems:
      1) Glass fiber is so hard that it causes damage to active
element (on thin film) and color filter.
      2) The control of spacer distribution is very difficu...