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ubergewehr273

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- TL;DR Summary
- How do I experimentally measure the inductance of a gold coil patterned on a glass substrate? The feature size is of the order of a few microns.

Hi all,

I recently fabricated a bunch of gold coils patterned onto a glass substrate and am in need of measuring the inductance of these samples. Since the feature size is in microns, I can't exactly use an RLC meter.

At the moment, I'm trying to build an LCR series circuit with a PCB and trying to see if at a fixed resonant frequency (which we define) and a fixed capacitance that we use, we observe resonance at said frequency thus determining the inductance experimentally. Previously I simulated the design of the coil in COMSOL and computed the inductance, and thus using the LC resonance approach. Unfortunately, my initial measurements yielded a lot of noise in the data when making the measurements using a vector network analyzer. That's probably because I didn't make my PCB designs robust and neglected a lot of connections (had to resort to using copper wires and silver epoxy to make connections, resulting in a frankensteinesque style of a circuit).

Is there a more direct way to measure the inductance? or a more alternate and robust approach to measuring it?

Thanks in advance!

I recently fabricated a bunch of gold coils patterned onto a glass substrate and am in need of measuring the inductance of these samples. Since the feature size is in microns, I can't exactly use an RLC meter.

At the moment, I'm trying to build an LCR series circuit with a PCB and trying to see if at a fixed resonant frequency (which we define) and a fixed capacitance that we use, we observe resonance at said frequency thus determining the inductance experimentally. Previously I simulated the design of the coil in COMSOL and computed the inductance, and thus using the LC resonance approach. Unfortunately, my initial measurements yielded a lot of noise in the data when making the measurements using a vector network analyzer. That's probably because I didn't make my PCB designs robust and neglected a lot of connections (had to resort to using copper wires and silver epoxy to make connections, resulting in a frankensteinesque style of a circuit).

Is there a more direct way to measure the inductance? or a more alternate and robust approach to measuring it?

Thanks in advance!