I am using probe station CRX-VF probe station. I read the manuall fot he probe configuration. IThe tip temperature is 45K. In such case, if I contact the tip to the sample, what is the real temperature of the sample if I set the sample stage 300K (assuming the temperature of the sample and sample stage is the same without tip)?
Is it possible to control the tip temperature or set the temperature of the tip similar to the sample stage?
Post by Lake Shore David D on Mar 30, 2017 11:38:42 GMT -5
The offset of the device temperature will depend on the number of probes landed on the device as well as the quality of the thermal link between device substrate and the sample stage. As an example: CRX-VF at 300 K stage temperature, with the sample substrate clamped to the stage, N-grease under the sample, and four probes landed on the device -- the device will be roughly 2 to 3 K colder than the stage. Without grease or clamping but the same probing configuration, that same device may be 10 K colder than the stage.
When working at room temperature and concerned about cooling the device through the arms, the probe anchors can be removed from the radiation shield stage and tied to the arms. This is not recommended when cooling the device to cryogenic temperatures.
Post by Dinh Loc Duong on Apr 3, 2017 22:05:40 GMT -5
Thank you for your information and instruction.
There is another thing I would like to ask. In the case of probe station CRX-4K, the thermal anchor of the tip is connected to the sample stage? It is quite proper to bring the temp. of sample and tips closer. Why is not designed for the CRX-VF? Is there any effect from the magnetic field?