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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) GaAs ¿þÀÌÆÛÀÇ ´ë¿ª´Ü ¿µ»ó¿¡ ´ëÇÑ Á¤·®Àû Çؼ®
¿µ¹®Á¦¸ñ(English Title) Quantitative Analysis on Near Band Edge Images in GaAs Wafer
ÀúÀÚ(Author) °­¼ºÁØ   ³ªÃ¶ÈÆ   Seong-jun Kang   Cheolhun Na  
¿ø¹®¼ö·Ïó(Citation) VOL 21 NO. 05 PP. 0861 ~ 0868 (2017. 05)
Çѱ۳»¿ë
(Korean Abstract)
µµÇÎ µÇÁö ¾ÊÀº ¹Ý Àý¿¬ LEC GaAs³»ÀÇ EL2¿Í ¾èÀº ÁØÀ§ ºÐÆ÷¸¦ ¿µ»óÈ­Çϱâ À§ÇØ ´ë¿ª´Ü Àû¿Ü¼± ¿µ»ó ±â¹ýÀ» È°¿ëÇß´Ù. ´ë¿ª´Ü Àû¿Ü¼± Åõ»ç ¸ÅÇο¡ ±Ù°ÅÇÑ º» ±â¹ýÀº ºÐ¼® ¼Óµµ°¡ ºü¸£°í ºñÆı«ÀûÀÎ ¹æ¹ýÀÌ´Ù. EL2 Èí¼ö ¿µ»óÀÌ ÄÜÆ®¶ó½ºÆ® ¹ÝÀüµÇ´Â ´ë¿ª´Ü ºÎ±Ù¿¡ ´ëÇÑ Á¤·®ÀûÀÎ Çؼ®Àº ¾ÆÁ÷ º¸°íµÇÁö ¾Ê°í ÀÖ´Ù. º» ³í¹®Àº ´ë¿ª´Ü ºÎ±Ù¿¡¼­ ¿µ»óÀÇ Æ¯Á¤ ºÎºÐ(cell, wall)¿¡ ´ëÇÑ Æ÷ÅäÄöĪ ¸ÞÄ¿´ÏÁòÀÇ ½ºÆåÆ®·³-, °ø°£- ¹× ¿Âµµ- Á¾¼Ó¼ºÀ» ³íÇÏ°í ÀÖ´Ù. °áÇÔ ºÎºÐº°(EL2w, EL2b)·Î Æ÷ÅäÄöĪ °³½ÃÁ¡ÀÌ ´Ù¸¥ °ÍÀº ºÒ¼ø¹° Á¾·ùÀÇ Â÷ÀÌ·Î ÀÎÇÑ ¼­·Î ´Ù¸¥ Àü±âÀû ÀÛ¿ë¿¡ ±âÀÎÇÑ °ÍÀ¸·Î Çؼ®ÇÒ ¼ö ÀÖ´Ù. ÀüÀ§(dislocation) ¹Ðµµ°¡ ³ôÀº °÷¿¡¼­´Â EL2b ¹Ðµµ´Â ¾à°£ ÀûÀº ¹Ý¸é EL2w ¹Ðµµ´Â º¸´Ù ¸¹´Ù´Â °ÍÀ» Á¤·®Àû Çؼ®À¸·ÎºÎÅÍ È®ÀÎ Çß´Ù.
¿µ¹®³»¿ë
(English Abstract)
Near band infrared imaging technique has adopted for imaging EL2 and shallow level distributions in undoped semi-insulating LEC GaAs. This technique, which relies on the mapping of near bandgap infrared transmission, is both rapid and non-destructive. Until now no quantitative analysis has been reported for near band edge region which gives the reverse contrast on EL2 absorption images. This paper presents the spectral, spatial and temperature dependence of photoquenching forward and inverse mechanism in the band edge domain for cells and walls and for direct and inverted contrast conditions during transitory regimes. The difference in the threshold for the EL2w and EL2b defects could be attributed to the contribution of a different electrical assistance due to a different species of impurities. Quantitative analysis results show an increased density of EL2w and a small reduction of EL2b in the region of the walls where there is a high density of dislocations.
Å°¿öµå(Keyword) ´ë¿ª´Ü   ½ºÆåÆ®·³ ¿µ»óÈ­   ¹Ý Àý¿¬ GaAs ¿þÀÌÆÛ   ÄÜÆ®¶ó½ºÆ® ¹ÝÀü   Defect concentration   Spectral imaging   LEC grown SI GaAs   Near band edge  
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