Technology to easily fill metal ink/paste into the pattern grooves
imprinted on a flexible/elastic plate to simplify transparent
electrode film making process
Client / Market
- Touch panel next generation display, optical film, security film, bio sensor,
microlens, membrane plate, 3D sensor, energy device and wave absorber, etc.
Necessity of this Technology
- Generally, a micro pattern is formed on a flexible/elastic material, and metal ink/
paste is filled inside the micro pattern to create a transparent conductive film.
- For example, a micro pattern of concave grooves is created on a synthetic resin film,
and the grooves are filled with metal ink/paste to form a transparent electrode.
- The process of creating transparent electrode becomes complex as the grooves
are filled with metal paste using a blade, and overflowing paste is removed-blading
process and cleaning process are added.
- For a large area, the conductive ink needs to be spread throughout the entire area-a
great ink consumption.
- Difficult to spread the ink evenly with a blade on a large area
- After inking, the areas outside the pattern needs to be cleaned-additional process
requiring a long time.
- Difficult to realize various patterns
Technical Differentiation
- Conductive ink is only filled inside the pattern-less ink consumption
- Without the blading and cleaning process, the number of process is reduced.
- Inking is easy and does not require separate inking device and cleaning device.
- Using laser, various patterns can be created-shortened pattern mask making time.
- There is no film damage from patterning, therefore various types of films can be used.
- Able to create sub-micrometer (500 nm) pattern (below 5 μm), which was difficult
with existing roll printing
- 5 μm (line width, spacing, shape) carving plate design and production: Designed
considering the ink spreading property and conductivity and penetrance property
after device production
(Pattern size: 500 nm, 1, 5, 10, 20, 30 μm Pattern spacing: 100, 200, 300, 400, 500 μm,
1 mm, 2 mm)
Excellence of Technology
- No limits regarding materials to be used as various types of flexible (PET, PEN, PC,
etc.) and elastic materials can be used.
- After plasma treatment of the film surface to create (super) hydrophobic surface
with the contact angle over 100 degrees, laser or roll imprint is processed to create
patterns.
- Conductive ink on film surface/Drop paste inside the concave pattern groove to form
a micro pattern and immediately dry/Harden
Current Intellectual Property Right Status
PATENT
- Transparent Conductive Film Manufacturing Method, Device and the Transparent
Film (KR1357284, EP14168884.6)
- Transparent Electrode Manufacturing Method Using Metal Pattern Based Print and
Transparent Electrode Thereby (KR1659462)
- Transparent Electrode Manufacturing Apparatus Using Metal Grid Based Printing
(US13/223365)
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