 The researches
in the photoelectron field have made great strides in the past
10-20 years along with the development of technologies on information
processing, communication and laser.
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The blue-LED
that was developed at the end of 1990's through growing a layer
of GaN single crystal film with sapphire as substrate is featured
in high efficiency of electricity-light conversion,
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Sapphire
substrate is a key material for manufacturing semiconductor
blue-LED and is the first choice for the production of blue-LED,
purple-LED, white-LED and blue-LD.
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Introduction to Lanjing Science
Lanjing Science and Technology Co.,
Ltd. of Yuxi City, Yunnan Province, whose registered capital
is RMB 20 million yuan and whose gross assets are RMB
50 million yuan, is a modern enterprise specially engaged
in the research, development and production of single
crystal production units and production technologies.
It is a private joint-stock enterprise, whose business
covers crystal growth equipment, sapphire single crystal
substrates for LED, windows and diversified single crystal
materials ... |
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Quality standard of the sapphire single
crystal bars:
1. Purity of sapphire
crystals＞ 99.996%;
2. There is no scattered particle, bubble, color, wrappage,
polycrystal or twinning inside sapphire crystals;
3. There is no narrow angle crystal, and the crystal
orienting precision is less than 0.3°.
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The quality control standard of single
crystal sapphire substrates:
1.
There is no scattered particulate or bubble inside sapphire
crystals;
2. There is no narrow angle crystal, and the crystal
orienting precision is less than 0.3°.
3. The dislocation density is less than 103/cm2；
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Lanjing
Science and Technology Co., Ltd. is a joint-stock corporation
under Yuxi Hengda Spacial Steel Structure Co., Ltd. (one of
the Top 100 private enterprises in Yunnan Province). It was
founded in 2002 with fixed assets of 38 million yuan and 30
active employees, including 15 specialized technical personnel
(50% of the total) and 10 developers (33%). The corporation
is provided with a high integrated quality and powerful technical
force, and it has got a rich technical reserve and talent advantage
on the R&D of sapphire crystals after the great effort made
in the past 4 years, which lay the foundation for the industrialization
of the project. ... |
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