Japan has developed a 2 inch SCAM crystal is expected to enhance the brightness of the chip

Japan Futian Crystal Technology Institute successfully developed a diameter of 50mm (2 inches) of ScAlMgO4 (SCAM) crystal. Base plate for GaN type light emitting elements such as blue LED element and blue violet semiconductor laser. Compared with most of the substrates used in the manufacture of blue LED elements, SCAM is more suitable for reducing the crystalline defects of GaN semiconductor, so it is expected to improve the brightness of light-emitting devices. According to the Institute, the Tohoku University Japan research team Matsuoka Takashi Metal Material Research Institute designed by Professor LED using cascading GaN semiconductor products, confirmed the usefulness of the material.

SCAM is characterized by only 1.8% of the lattice mismatch with GaN, which is not easy to produce lattice dislocations such as crystal defects. Although it is difficult to make the industry before the SCAM crystal, but the crystallization of the Institute of Futian technology using CZ method successfully produced 2 inches of high-quality SCAM crystal. According to the study, the crystal quality was improved by improving the conditions of crystal growth and crystal growth furnace. In this paper, the C surface was measured by X ray diffraction method, and the SCAM surface was evaluated. The results showed that the half amplitude was 12.9 seconds, and the crystalline quality was quite similar to that of Si.

In addition, the research institute does not need to cut and grind the processing technology, but uses the SCAM crystal block to make the wafer through the split processing. This reduces wafer cost. The GaN thin films were grown on the split plane of SCAM crystal at 1040 DEG C by organic chemical vapor deposition method. This is also a great achievement.

Fukuda Institute of crystal technology will continue to try to continue to increase the caliber of SCAM crystal, it will be commercialized operation. Fukuda crystallization technology institute will start selling 2 inches of SCAM substrate in the spring of 2015.

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