| Product List |
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| ITO glass for STN/TN LCD |
| GemTech Optoelectronics Corpation is a wholly
own subsidiary of the Cheng Loong Corporation,
one of the leading manufacture of industrial paper
in Taiwan. The main product for GemTech is ITO
glass for TN/STN LCD, Touch Panel and PDP industries.
The major glass size varied from 10inch to 50inch
in diagonal. Besides ITO glass, GemTech keeps
developing the other coated products for Flat
Panel Display industries. |
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| Polyimide
Film (PI) |
| In general, polymers orient the nematic director
parallel to the substrate but do not induce uniform,
reproducible LC alignment. Polyimides became popular
in the early 1980's as LCD alignment layers, and
their ease of use, stability, and reproducible
results have made them the industry standard.
Most polyimides are not easily dissolved (gamma-butyrolactone
is a common solvent) and do not spincoat well.
Because of this, they are usually supplied in
a precursor solution of polyamic acid and an organic
solvent such as NMP. These solutions are highly
hygroscopic, able to absorb several percent of
their weight in water within several hours; for
this reason, they are typically stored in tightly
sealed containers in a freezer. After spincoating,
the films are imidized (cured) at 200-300 for
one hour. In production settings, an offset printer
is often used for polyimide coatings. The advantages
of this are better materials utilization and ability
to mask off the gasket seal area. Film thicknesses
are typically 500-800 angstroms. |
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