Specific Process Knowledge/Characterization/Hardness measurement: Difference between revisions
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=Hardness tester= | |||
[[Image:InnovaHardness.jpg|thumb|300x300px|Hardness tester. Positioned in cleanroom F-2]] | [[Image:InnovaHardness.jpg|thumb|300x300px|Hardness tester. Positioned in cleanroom F-2]] | ||
The purpose is to measure hardness of samples or films. This is done by pressing an indenter (a small pyramid-shaped diamond tip) into sample using a known indentation force. This leaves an indent in the sample. The hardness of the sample can then be derived from the dimensions of the indentation (the softer the material the larger the indentation). The samples should have a reasonably low roughness. Otherwise it can be quite difficult to determine the | The purpose is to measure hardness of samples or films. This is done by pressing an indenter (a small pyramid-shaped diamond tip) into a sample using a known indentation force. This leaves an indent in the sample. The hardness of the sample can then be derived from the dimensions of the indentation (the softer the material the larger the indentation). The samples should have a reasonably low roughness. Otherwise it can be quite difficult to determine the hardness reliably. Also, the samples must be planar and without large protruding features. | ||
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There is no scheduled calibration of this machine. We do however have three calibration samples which can be used to verify proper operation of the machine. The calibration samples are also good for practicing the measurement procedure. | There is no scheduled calibration of this machine. We do however have three calibration samples which can be used to verify proper operation of the machine. The calibration samples are also good for practicing the measurement procedure. Calibration samples are available in the following three hardnesses: 277 HV, 464 HV and 704 HV. They have been calibrated externally at 1 kgf indentation force and 10 sec indentation time. | ||
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|style="background:WhiteSmoke; color:black"| | |style="background:WhiteSmoke; color:black"| | ||
*Machine can calculate hardness in HV (Hardness Vickers) and show result on display | *Machine can calculate hardness in HV (Hardness Vickers) and show result on display | ||
*The integrated printer has been disabled (not cleanroom compatible) | |||
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Substrate materials allowed | Substrate materials allowed | ||
|style="background:WhiteSmoke; color:black"| | |style="background:WhiteSmoke; color:black"| | ||
*No restrictions (besides sample must be dry and free from chemical residues) | *No restrictions (besides sample must be non-toxic, dry and free from chemical residues) | ||
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| style="background:LightGrey; color:black"| | | style="background:LightGrey; color:black"| | ||
Calibration samples available | Calibration samples available | ||
|style="background:WhiteSmoke; color:black"| | |style="background:WhiteSmoke; color:black"| | ||
* | *277 HV 1 | ||
* | *464 HV 1 | ||
* | *704 HV 1 | ||
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