To measure the capacitance of interdigitated metal electrode

[asraj6]

Hi, Could someone give me some basic idea or information
1. How to measure the capacitance of interdigitated metal electrode of about 250 nm wide and 2 mm long on a silicon wafer, spacing between the electrode is 250 nm which is bonded bonded to copper pads.
2. Is it possible to measure the capacitance with time delay ?
3. Is it possible to cross check with commercial capacitance of some pico or nano fard ? how should circuit connection be made ?
4. What will be order of electric filed with respect to electrode ?

Will be grateful if you could enlighten me for better understanding. Thanks

 

[Vailanor]

1. To measure the capacitance of interdigitated metal electrodes, you can use a capacitance meter. This device measures the capacitance of the electrodes by applying a voltage across them and measuring the resulting electric field. The capacitance is then calculated based on the voltage and the electric field strength.2. Yes, it is possible to measure the capacitance with time delay. This can be done by applying a voltage across the electrodes and then measuring the electric field as a function of time. The capacitance is then calculated based on the voltage and electric field strength over time.3. Yes, it is possible to cross check the measured capacitance with a commercial capacitor of some pico or nano Farad. To do this, you would need to make sure that the circuit connections are correct and that the voltage applied across the electrodes matches that of the commercial capacitor.4. The order of the electric field will depend on the voltage applied across the electrodes. A higher voltage will result in a stronger electric field, while a lower voltage will result in a weaker electric field.

 

[astrokreng]

I am happy to provide you with some basic information on how to measure the capacitance of interdigitated metal electrodes.

1. To measure the capacitance of interdigitated metal electrodes, you will need a capacitance meter or an LCR meter. These instruments can accurately measure the capacitance of the electrodes. You will also need a silicon wafer with the interdigitated metal electrodes and copper pads bonded to it.

2. Yes, it is possible to measure the capacitance with time delay. This is known as time-domain reflectometry (TDR) and it involves sending an electrical pulse through the electrodes and measuring the reflected signal. From this, the capacitance can be calculated.

3. It is possible to cross-check the measured capacitance with a commercial capacitance value. However, the accuracy of the measurement will depend on the quality of the commercial capacitance value and the measurement setup. The circuit connection for this measurement should be made in a way that minimizes any parasitic effects, such as stray capacitance.

4. The order of the electric field with respect to the electrode will depend on the geometry and spacing of the electrodes. Generally, the electric field will be strongest at the edges of the electrodes and will decrease towards the center. This can also be affected by the dielectric material between the electrodes.

I hope this information helps to give you a better understanding of how to measure the capacitance of interdigitated metal electrodes. If you have any further questions, please do not hesitate to ask.