Browse Prior Art Database

End Seal Process and Equipment under Low Atmospheric Pressure

IP.com Disclosure Number: IPCOM000123105D
Original Publication Date: 1998-May-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 29K

Publishing Venue

IBM

Related People

Yamanaka, H: AUTHOR [+2]

Abstract

A process and equipment are disclosed that LCD (Liquid Crystal Display) end seal method under low atmospheric pressure. A Conventional end sealing process has two steps, mechanical pressing machine gives high pressure to the stacked cells, and weakens the pressure to suck the end seal material. This process induces the spacer-ball compression that causes the alignment layer damage under the vibration stress. To avoid this effect, the one step sucking in process using vacuum chamber is disclosed.

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End Seal Process and Equipment under Low Atmospheric Pressure

   A process and equipment are disclosed that LCD (Liquid
Crystal Display) end seal method under low atmospheric pressure.  A
Conventional end sealing process has two steps, mechanical pressing
machine gives high pressure to the stacked cells, and weakens the
pressure to suck the end seal material.  This process induces the
spacer-ball compression that causes the alignment layer damage under
the vibration stress.  To avoid this effect, the one step sucking in
process using vacuum chamber is disclosed.

   A basic structure of this machine is shown in Figure.

   LCD cells are set in the vacuum chamber baring the end
seal position, and the end seal material was put on the sucking
hole.  Reducing the pressure by using a vacuum pump, the end seal
material was sucked from the hole.

   This process results in no compression stress for
spacer-ball.  This process and equipment avoid the alignment layer
damage by the spacer-ball that was moved between the two glass
substrates by vibration stress.