RESEARCH & DEVELOPMENT

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SINGLE CRY STAL TRANSDUCER

ÈÞ¸Õ½ºÄµÀº ÀÇ·á¿ë ÃÊÀ½ÆÄ Å½ÃËÀÚÀÇ Single Crystal »ç¿ë¿¡ °üÇÑ Áö¼ÓÀûÀÎ ¿¬±¸¸¦ ÇØ¿Ô½À´Ï´Ù. 1980³â´ë ¸¹Àº ¿¬±¸¹ßÇ¥¿¡¼­ Single CrystalÀÇ¿ì¼ö¼ºÀº ÀÎÁ¤Çϸ鼭µµ »ó¿ëÈ­ÀÇ ¾î·Á¿ò°ú ¾ç»êÀÌ ºÒ°¡ÇÏ´Ù´Â ÆÇ´ÜÀ» ÇØ¿À´ø ½ÃÁ¡¿¡¼­ ÈÞ¸Õ½ºÄµÀº 2001³â 11¿ù MEDICA¿¡¼­ ¼¼°èÃÖÃÊÀÇ PMN-PT Single Crystal ½ÉÀå¿ë Æ®·£½ºµà¼­¸¦ ¼º°øÀûÀ¸·Î »ó¿ëÈ­, ¾ç»êÈ­¿¡ ±â¹ÝÇÑ Á¦Ç°À¸·Î Ãâ½ÃÇÏ¿´½À´Ï´Ù. 1-3)ÀÌÈÄ ÈÞ¸Õ½ºÄµÀº Single Crystal Æ®·£½ºµà¼­ °³¹ßÀÇ ¿ª»ç¸¦ À̲ø¾î¿À¸ç, ±âÁ¸ÀÇ ÀÇ·á¿ë ÃÊÀ½ÆÄ Å½ÃËÀÚµé°ú´Â ´Ù¸¥, ½Å±â¼ú¿¡ ¹ÙÅÁÇÑ ³î¶ó¿î ¼ºÀåÀ» ÇØ¿À°í ÀÖ½À´Ï´Ù.

  • 1) "2.6 MHz Phased Array Ultrasonic Probe using PMN-TP Single Crystal Grown by the Bridgman Method,"
    Proc, IEEE Ultrason. Symp., pp. 1114-1119, 2002.
  • 2) "A 128ch 7.5 MHz Linear Array Ultrasonic Probe using PMN-PT Single Crystal,"
    Proc, IEEE Ultrason. Symp., pp. 782-785, 2003.
  • 3) "A 6.0 MHz 0.15 mm Pitch Phased Array Ultrasonic Probe using PMN-PT Single Crystal,"
    Proc, IEEE Ultrason. Symp., pp. 219-222, 2005.

ÈÞ¸Õ½ºÄµÀº Áö¼ÓÀûÀÎ R&D¸¦ ÅëÇÏ¿© ´Ù¾çÇÑ ±â¼úÀû Áøº¸¸¦ °ÅµìÇØ ¿Ô½À´Ï´Ù. ÈÞ¸Õ½ºÄµÀÇ single crystal Æ®·£½ºµà¼­´Â ±âÁ¸ÀÇ PZT ¼¼¶ó¹Í Æ®·£½ºÆ©¼­¿¡ ºñÇÏ¿© sensitivity ¼º´ÉÀ» µÎ ¹è ÀÌ»ó Çâ»ó½ÃÄ×°í, Ä®¶ó ÅäÇ÷¯ÀÇ º¯º°·ÂÀ» ³ôÀÓÀ¸·Î½á, Ç÷·ùÀÇ È帧ÀÌ ´À·Á °Ë»ç°¡ ¾î·Á¿î º¹ºÎ¿ë Ç÷·ù °Ë»çµµ Á¤È®ÇÑ Áø´ÜÀ» °¡´ÉÇÏ°Ô ÇÏ¿´½À´Ï´Ù. Bandwidth ¼º´É¿¡¼­µµ ±âÁ¸ÀÇ PZT Æ®·£½ºµà¼­°¡ 50~80%ÀÇ ¼º´ÉÀ» º¸À̴µ¥¿¡ ºñÇÏ¿©, ÈÞ¸Õ½ºÄµÀÇ single crystal Æ®·£½ºµà¼­´Â 100% ÀÌ»óÀÇ bandwidth ¼º´ÉÀ» ¹ßÈÖÇÏ¿©, harmonic imaging ¼º´ÉÀ» ÃÖ´ëÈ­ ½Ãų ¼ö ÀÖ°Ô µÇ¾ú½À´Ï´Ù. º¯º°ÀÌ ¾î·Á¿î À̹ÌÁö Àϼö·Ï harmonic imaging Àº °íÇØ»óµµÀÇ À̹ÌÁö °Ë»ç¸¦ À§ÇØ ´õ¿í Áß¿äÇÑ ±â¼úºÐ¾ß°¡ µÇ°í ÀÖ½À´Ï´Ù. ¶ÇÇÑ ÈÞ¸Õ½ºÄµÀÇ single crystal Æ®·£½ºµà¼­´Â harmonic imaging¿¡¼­µµ sensitivityÀÇ ¼Õ½Ç¾øÀÌ multi-frequencyÀÇ Tx/Rx »ç¿ëÀÌ °¡´ÉÇϵµ·Ï ÇÕ´Ï´Ù.

Single Crystal 2D Matrix Array 4-6)
  • 4) "PMN-PT Single Crystal for 2D Array for 3D intracardiac Echocardiography,"
    U.S. Navy Workshop on Acoustic Transduction Material and Devices, Pennsylvania, USA.
  • 5) "1.5 D Phased Array using PMN-PT Single Crystal for Cardiac Application, "
    Korea Government Project No. 10010313, 2003-2005.
  • 6) "2D Array using PMN-PT single Crystal for 3D imaging," Korea Government Project No.0001449, 2001-2003.