Specific Process Knowledge/Characterization/Thickness Measurer: Difference between revisions
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0.5 µm | *0.5 µm | ||
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Revision as of 11:21, 13 January 2014
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Thickness measurer
The purpose is to measure the thickness of wafers, depths of larger grooves or height of larger mesas.
Doing a KOH etch can it be helpful to insure no over etching by making a thickness measurement doing the etch.
The user manual, technical information and contact information can be found in LabManager:
Quality Control - Recipe Parameters and Limits
| Quality Control (QC) for the Thickness measurer |
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The measured standard thickness is 0.1 mm. The measured result have to be within +- 0.005 mm. The QC is preformed ones a year. |
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Purpose |
Thickness measurer |
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Performance |
Thickness within |
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Process parameter range |
Process Temperature |
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| Process pressure |
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Substrates |
Batch size |
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| Substrate materials allowed |
No restriction. |
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This is a micrometer-screw.
It measures with an accurracy within a few µm. The range is from a few µm up to 5mm. Measure the wafer in the box next to the meter. If this is ok, then other wafers can be measured. There is a calibration device by the DEKTAK. It is calibrated at 750µm.