DaveM wrote:"Created testing protocols for the frequency dependent electrical properties of thin films. "
Frequency dependent.....He must not have spent the last 4 years working on a DC capacitor. Imagine that.....this invalidates about 65 gazillion posts from some skeptics I know.
This world shaking Linked In profile update can only mean one of two things: EEStor is done or EEStor is done.
You clearly see the world in black and white - for you investigating frequency response clearly means Pettey cannot be doing any work relevant to DC!!
For some years ee-tom has been pointing out that if DW's EESU works then DW can make a lot of money by selling the product into the standard capacitor marketplace, some of which requires that the capacitors perform well at high frequency. So there is at least one commercial reason to do this stuff.
The other reason that AC measurements are good is that it enables you do something called impedance spectroscopy. This lets you work out some of what is going on inside a capacitor just by measuring its frequency response. It tells you things you would like to know even if you are only using it in DC mode.
Hi Pete, In medicine when we hear hoof beats we don't always think of zebras, our world is quite nuanced; as is the story around EEStor. I realize that there are possible explanations for AC testing of capacitors, but the interresting thing about this item from LPs' resume is that he mentioned it specificallly and that he referred to thin films specifically
Although you can create an explanation for this around the idea that he is testing a capacitor, there other possible explanations for this that I find much more interresting.
In particular, this: http://en.wikipedia.org/wiki/Resonant-tunneling...
"Resonant-tunneling diode (RTD) is a diode with a resonant-tunneling structure in which electrons can tunnel through some resonant states at certain energy levels. The current–voltage characteristic often exhibits negative differential resistance regions.
All types of tunneling diodes make use of the quantum mechanical tunneling. Characteristic to the current–voltage relationship of a tunneling diode is the presence of one or more negative differential resistance regions, which enables many unique applications. Tunneling diodes can be very compact and are also capable of ultra-high-speed operation because the quantum tunneling effect through the very thin layers is a very fast process."
Last edited Sun, 18 Dec 2011, 10:14am
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