The wafers are mounted in the cryogenic probe stage as follows

1. Prepare the sample fixture: Customize a sample fixture to fit the characteristics of the wafer.wafer tester The fixture can be made from stainless steel or PEEK machinable plastic, or it can be 3D printed. Ensure that the fixture holds the wafer securely and avoids interference with the probe arm.

2. Clean the surface of the sample holder: Before mounting the sample using vacuum grease, make sure the surface of the sample holder is clean and dust free. This can be cleaned with anhydrous ethanol or other appropriate cleaner.

3. Apply Vacuum Grease: Apply an appropriate amount of N-Grease to the sample holder surface. Follow the principle of "the less the better, the harder the better" to ensure even distribution of the grease.

4. Mount the wafer: Place the wafer on the sample holder and gently press it into contact with the grease.wafer probe testing Ensure that there is an adequate conduction path for heat exchange between the wafer and the sample holder.

5. Secure the fixture: Use flat head screws or other low-profile fasteners to secure the fixture to the wafer. Make sure the fixture holds the wafer securely and avoids interference with the probe arm.

6. Adjust Fixture Position: Depending on the orientation of the device Pad, adjust the position between the fixture and the probe arm to avoid interference.

7. Cool down and test: Cool down the sample stage to the desired temperature and test accordingly.vibration isolation table Note that the use of N-Grease should be avoided when the temperature of the sample stage exceeds 303 K.