Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Laserbased Production of Gelatin Color Filters

IP.com Disclosure Number: IPCOM000115071D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Zapka, W: AUTHOR [+2]

Abstract

Disclosed is a laserbased production process for multi-color gelatin color filters used in flat panel displays which replaces conventional photolithography and chemical/mechanical strip processes by a single laser ablation step.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 56% of the total text.

Laserbased Production of Gelatin Color Filters

      Disclosed is a laserbased production process for multi-color
gelatin color filters used in flat panel displays which replaces
conventional photolithography and chemical/mechanical strip processes
by a single laser ablation step.

      A first organic layer 1 is deposited on a substrate 2 coated
with a gelatin layer 3.  The required properties of the organic layer
1 are its removability by laser ablation and its capability of acting
as diffusion barrier during the dyeing step.  A conventional photo
resist covers both these properties.  In Fig. 1 the first organic
layer 1 is opened by excimer laser ablation in those areas where
diffusion of the first dye shall take place as shown in Fig. 2.  In
contrast to conventional dyeing processes the patterned diffusion
barrier layer 1 is not removed after the diffusion of the first dye.

      The second dyeing step starts with the deposition of a second
organic layer 4 which shall act as a diffusion barrier for a second
dye.  By laser ablation the first and second organic layers 1,4 are
opened in those areas where the diffusion of a second dye is planned
(Fig. 3), and the second dye diffuses into the gelatin layer 3.  The
same process sequence may be applied to a third dyeing step or to the
formation of an absorbing grid structure between the colored areas of
the gelatin layer.

      In the process sequence as described above without removing the
barrier laye...