Jandel Engineering offers an indium-tin-oxide (ITO) coated glass sample that can be used as a reference sample to assess whether a four point probing system is work-ing properly.
The sample is not NIST traceable, but assigned values are carefully assessed based on measurements made by an employee with over 20 years of four point probe measurement experience. The dimension of the samples are 2” square with the assigned value applying to the 1” central area of the sample. The assigned values are between 12 and 15 ohms-per-square which is printed on the sample as shown below..
The ITO is a transparent oxide. The labels are applied to the bottom of the sample which is not coated with ITO. The labels are applied from the bottom such that the printed value can be read through the sample while measuring the top side which has the ITO layer applied.
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The ITO is a transparent oxide. The labels are applied to the bottom of the sample which is not coated with ITO. The labels are applied from the bottom such that the printed value can be read through the sample while measuring the top side which has the ITO layer applied. |
Notes regarding the Reference Sample:
- Avoid taking measurements from a fixed point, spread measurements across the central area
- Measure the sample 3 times and calculate the mean average, a current of 10mA is suggested
- Use the average of the forward and reverse readings
- Leave the sample in its protective container when not in use
- Do not touch the measurement surface of the sample
- The sample can be cleaned using IPA and dried with filtered nitrogen
This sample is not a traceable standard, it is a reference sample. NIST traceable standards are available from VLSI Standards.
Downloads
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A brochure regarding the Jandel Four Point Probe Reference Sample |
Four-Point-Probes is a division of Bridge Technology. To request further information please call Bridge Technology at (480) 219-9007 or send e-mail to Joshua Bridge at: sales@bridgetec.com
