In 2010, the LED backlight TV market grew rapidly, and the number of MOCVD machines increased. In the market, LED sapphire substrates are in short supply. The quantity and quality of the sapphire crystal growth furnace determine the quantity and quality of the sapphire substrate. To this end, LEDinside interviewed Ms. Chen Hong, deputy general manager of Hong Kong Core Technology Co., Ltd., who is the supplier of LED-grade sapphire crystal equipment, to discuss the current status and development trend of the sapphire substrate market.
Market status of sapphire substrates
In 2010, it was widely recognized as the first year of LED development in the industry. Information feedback from lighting giants in Europe and the United States, LED lighting in the general lighting market within 5 years is the general trend. With the rapid growth of the number of MOCVD abutments, the high-quality sapphire substrates for LED epitaxial wafers are in short supply. About one-third of the MOCVDs currently installed are in production, and the average price of sapphire substrates is all from the lowest. USD/Piece rose to $30/piece (2 inches).
Epitaxial wafer manufacturers' requirements for sapphire substrates:
1. Stable quality: The products of each batch have little difference and good consistency.
2. Dislocation density is small: Dislocation density refers to the number of defects per square centimeter of substrate. At present, the sapphire crystal bit density produced by Crest ISS3510 can be less than 1000, about 400-600.
3, the supply chain can keep up: the capacity of the chip manufacturer can be quickly synchronized with the expansion of the epitaxial wafer manufacturers.
Current situation of sapphire production equipment on the market
The sapphire crystal growth equipment cannot be simply counterfeited. The equipment must be designed based on the crystal growth technique and the physicochemical properties of the sapphire crystal. The sapphire crystal growth equipment mainly includes a thermal field system, a control system, a power supply, a crystal conversion crystal lifting system, a vacuum system, and a supporting system for the furnace cavity. At the same time, sapphire crystal materials are also developing in the direction of large diameter, high quality and industrialization. This requires the development of crystal growth equipment to be large-scale, with good stability, high quality, high degree of automation, and operational use. Convenience and other advantages. The biggest drawbacks of the same type of sapphire equipment on the market today are:
One: high artificial dependence. The operation of the equipment depends on the subjective judgment of the human experience. The experience and technical level of the operator determine the quality of the product, and the dependence on the operator is very high.
Second: the order delivery period is long. It takes an average of two years for the similar equipment in the market to be released from the order to the official production cycle. The delivery schedule of the EST equipment can be done in 3 months, and the commissioning is completed within 4 months.
Third: the product consistency is poor, the dislocation density of the current bubbling equipment on the market can best be 400-900, but the difference between the furnaces is large, for example, the first furnace is 700-800, and the second furnace may be 400- 600, the third furnace may be 800-900, the furnace is unstable. Epitaxial wafer manufacturers need to formulate corresponding processing methods according to different dislocation densities. The difference in dislocation density of each furnace crystal greatly increases the cost and difficulty of process debugging for the processing of epitaxial wafers.
What are the advantages of Crest's sapphire growth furnace?
Crest is specialized in the production of sapphire equipment for LED epitaxy. Our sapphire growth equipment is fully automated. The biggest advantage of Crest's ISS equipment is that it changes the production process of sapphire crystal from art to technology and the quality of the product is stable. reliable. The Crest ISS sapphire crystal growth furnace has several advantages:
1. The fully self-developed LSG process method realizes automatic crystal growth, which greatly improves the crystal growth rate, output and consistency compared with the original bubble generation method.
The current mainstream sapphire crystal growth processes in the world are the soaking method, the pulling method, the guiding mode and the heat exchange method, and the sapphire crystal grown by the bubble method is about 70% of the current market share. The bubble method is the most suitable method for the production of LED sapphire, and the quality of the crystal produced is higher. The crystal quality produced by other methods is not very good.
The Krist ISS sapphire crystal growth furnace uses a completely self-developed LSG process. The LSG process is based on the bubble method and further process optimization and improvement to ensure the crystal bit produced by the ISS3510 device. The wrong density can be achieved below 1000, and the consistency of each batch of crystals is very good. The Crest ISS equipment can achieve a difference of no more than 10% between furnaces.
2. Crest is the first LED-grade crystal growth furnace in China that provides closed-loop control and is fully automated.
The full range of sapphire growth furnaces from Kristall ISS uses a high-precision power supply of five-fifths, advanced thermal systems, fully automatic closed-loop control systems and many other advanced designs, and integrates a complete and reliable process package.
3, CrystalTech ISS automatic crystal growth furnace compared with other equipment of the same type
Project CrystalTech ISS full range of sapphire crystal growth furnace other manufacturers
Process LSG method for soaking or pulling
Adopt technology independent, independent research and development of foreign technology transfer or cooperation
High degree of automation, fully automatic, low closed loop control, relying on manual manual operation
High yield, high product consistency, but low product consistency
Crystal bit error density 100-level or 10,000
The process package has a full set of growth process packages without a full set of growth process packages, which is highly dependent on the equipment manufacturer.
4, Crest can provide users with turnkey projects for the growth of LED-grade sapphire crystals.
Except for Crest, there is no other integrated solution that can provide all LED grade sapphire crystal growth production processes and equipment in China and around the world.
In pre-sale, in-sale, after-sales, Crest provides comprehensive services: pre-sales project manager to enter the factory, assist in water and electricity supporting planning, etc.; in the sale, the process manager mainly provides support and training in process debugging; after-sales Operation process support, due to the high degree of automation of the Crest device, its equipment is connected with the remote monitoring server of Crest. In the event of equipment failure, the fault will immediately alert the server to the Crest. Ensure that customer failures are resolved in a timely manner.
Current customer status of Crest
At present, 5-6 companies have cooperated with Crest, and 200 devices are expected to be invested next year. The customers of Crest are currently mainly in Taiwan and mainland China, and the number of devices planned and installed by two customers in Taiwan has reached 200 each. In 2011, Crest's customers will be able to supply 6 million pieces of 2 and 4 inch sapphire substrates. In November of this year, our equipment will begin delivery. It is expected that by December 2011, the demand for LED sapphire substrates will be solved.
LEDinside view:
The market for sapphire substrates for LED epitaxial wafers has received wide attention in the market in the past year. More than 10 companies have planned to enter the production of sapphire crystals, and related equipment and complete technical support are the most needed. Crest can provide a full range of solutions including equipment and processes, which will be in a favorable position in the market competition.
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