4-Point-Probes


 

Ç¥¸éÀúÇ× ¹× ÀúÇ×Ä¡, µÎ²²ÀÇ °è»ê ¹æ¹ý( ¹ÝµµÃ¼¿¡ ´ëÇÑ ÀÀ¿ë)

Four point probe(ÈÌ Æ÷ÀÎÆ® ÇÁ·Îºê)´Â  ¾ÈÂÊ µÎÁ¡»çÀÌÀÇ Àü¾Ð°ú ¹Ù±ùÂÊ µÎÁ¡»çÀÌÀÇ Àü·ù¸¦ ÃøÁ¤ÇÏ¿© ¹Ú¸·(thin layer) ¹× ´µÆ®(sheet)ÀÇ ÀúÇ×Ä¡¸¦ ÃøÁ¤ÇÏ´Â °èÃø±âÀÌ´Ù.

 ÇÁ·Îºê Æ÷ÀÎÆ®ÀÇ °£°ÝÀÌ ÀÏÁ¤Çϸé, Àüµµ¼º Çʸ§ÀÇ µÎ²²´Â °£°ÝÀÇ 40%À̸ç, Çʸ§ ¿¡Áö´Â ÃøÁ¤ Æ÷ÀÎÆ® °£°ÝÀÇ 4¹èÀÌ°í Æò±Õ ÀúÇ×Ä¡, Ç¥¸é ÀúÇ×Ä¡´Â ´ÙÀ½ °ø½ÄÀ¸·Î ÁÖ¾îÁø´Ù.

 

Rs = 4.53 x V/I

Çʸ§ µÎ²²¿Í(in cm)  ÀúÇ×Ä¡´À Rs¿¡ ´ëÇؼ­ ´ÙÀ½°ú °°ÀÌ ³ªÅ¸³½´Ù.

Rs = resistivity/thickness

±×·¡¼­ Çʸ²ÀÇ µÎ²²¸¦ ¾Ë¸é ÀúÇ×Ä¡¸¦ °è»êÇÒ ¼ö ÀÖ°í, ÀúÇ×Ä¡¸¦ ¾Ë¸é Çʸ§ÀÇ µÎ²²¸¦ °è»êÇÒ ¼ö ÀÖ´Ù.

¿ë¾î Çؼ³

Ohms per square: Ç¥¸éÀúÇ× ÃøÁ¤ ´ÜÀ§. ÀÌ·Ð ¸éÀûÀÇ ¸¶ÁÖÇÑ µÎ Àü±Ø »çÀÌÀÇ ÀúÇ×Ä¡¿Í °°´Ù. ÃøÁ¤ ¸éÀûÀº Áß¿äÇÏÁö ¾Ê´Ù.

Resistance: unit of measurement for the ratio of applied voltage to the current passing through a material.

Surface resistivity: ohms per square·Î ³ªÅ¸³»´Â Ç¥¸é Àü·ù(amp/meter)¿¡ ´ëÇÑ DC Àü¾Ð(volt/meter)ÀÇ ºñÀ²ÀÌ´Ù.

A helpful article that answers the question, Ohms-per-square What!?