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Post by Baron von Lotsov on Sept 30, 2024 11:04:11 GMT
I heard in the news Huawei filed a patent for a graphene transistor about a year or so ago but I was never told of which patent in order to look it up and have since wondered whether it was a breakthrough or not. I found a useful video though which gives an overview of graphene transistor research. News articles never tell you the nitty gritty details. It turns out the problem for the last 20 years and why everyone has been held up so much is to do with Dirac points. Wiki has a rundown on what a Dirac point is. en.wikipedia.org/wiki/Dirac_cone
It's rather amazing the research was only experimentally verified 50 years later. The problem here is these points are where there is zero bandgap in momentum space. If one were to build a graphene transistor it would work like a tap you could not fully switch off, and that wastes leccy if you have millions of these things on a chip.
There are some ways thought to change the physical properties so we do get a band gap. One of them is employing Klein tunnelling.
But this method slows the switching speed right down, far worse than the conventional FET.
Now in 2024 we actually have a working transistor with a bandgap of 0.6Ev using some epitaxial technique. there is a bit more complication to it than mentioned, so you may want a full explanation which is here.
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Post by Vinny on Sept 30, 2024 11:12:33 GMT
No to Huawei and their spyware.
No to Communist dictatorship China.
Buy British.
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Post by Baron von Lotsov on Sept 30, 2024 11:45:12 GMT
No to Huawei and their spyware. No to Communist dictatorship China. Buy British. Well it was published in a British journal. The good thing about Asianometry is Jon gives us the references so we can take a look. Here is the paper of 2024 that makes this stuff work.
Here are the folk who figured it out.
Show me a British name amongst that team.
It's sad in a way. I learnt this science myself back in the day, but there were not any jobs in it. I actually agree with you in a sense. The Brits should be working in these industries. Got any bright ideas how we can make it happen?
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Post by Vinny on Sept 30, 2024 12:01:20 GMT
Ban Chinese imports, force tech companies to employ Brits.
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Post by Baron von Lotsov on Sept 30, 2024 12:38:47 GMT
Ban Chinese imports, force tech companies to employ Brits. I don't think they are smart enough. It's the same with battery technology. Dealing with the physics of matter is a mathematical discipline. You need the mathematical tools to do the job and at this level it is very sophisticated. On another channel a team has just developed a sodium battery that has an exceedingly long lifespan due to the chemistry of the battery that was optimised by AI. A degree in physics only scratches the surface of the knowledge you need. You need post graduate mathematical skills which I never/very rarely see in this country. This expertise is mostly in the US and the Far East. You get the odd paper from a European country (often Germany), but they are thin on the ground. The Far East is where the intense research takes place as you can see by this paper. If it makes it to Nature, it generally means it is top tier. |
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Post by Vinny on Sept 30, 2024 12:59:09 GMT
We have enough talent we just need to stop the lazy reliance on cheap imports.
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Post by jonksy on Sept 30, 2024 13:18:42 GMT
I heard in the news Huawei filed a patent for a graphene transistor about a year or so ago but I was never told of which patent in order to look it up and have since wondered whether it was a breakthrough or not. I found a useful video though which gives an overview of graphene transistor research. News articles never tell you the nitty gritty details. It turns out the problem for the last 20 years and why everyone has been held up so much is to do with Dirac points. Wiki has a rundown on what a Dirac point is. en.wikipedia.org/wiki/Dirac_cone
It's rather amazing the research was only experimentally verified 50 years later. The problem here is these points are where there is zero bandgap in momentum space. If one were to build a graphene transistor it would work like a tap you could not fully switch off, and that wastes leccy if you have millions of these things on a chip.
There are some ways thought to change the physical properties so we do get a band gap. One of them is employing Klein tunnelling.
But this method slows the switching speed right down, far worse than the conventional FET.
Now in 2024 we actually have a working transistor with a bandgap of 0.6Ev using some epitaxial technique. there is a bit more complication to it than mentioned, so you may want a full explanation which is here.
The first pattern taken out for Graphene transistors was 2004 its old hat BVL GFets have been out for decades..
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Post by borchester on Sept 30, 2024 14:16:19 GMT
I heard in the news Huawei filed a patent for a graphene transistor about a year or so ago but I was never told of which patent in order to look it up and have since wondered whether it was a breakthrough or not. I found a useful video though which gives an overview of graphene transistor research. News articles never tell you the nitty gritty details. It turns out the problem for the last 20 years and why everyone has been held up so much is to do with Dirac points. Wiki has a rundown on what a Dirac point is. en.wikipedia.org/wiki/Dirac_cone
It's rather amazing the research was only experimentally verified 50 years later. The problem here is these points are where there is zero bandgap in momentum space. If one were to build a graphene transistor it would work like a tap you could not fully switch off, and that wastes leccy if you have millions of these things on a chip.
There are some ways thought to change the physical properties so we do get a band gap. One of them is employing Klein tunnelling.
But this method slows the switching speed right down, far worse than the conventional FET.
Now in 2024 we actually have a working transistor with a bandgap of 0.6Ev using some epitaxial technique. there is a bit more complication to it than mentioned, so you may want a full explanation which is here.
The first pattern taken out for Graphene transistors was 2004 its old hat BVL GFets have been out for decades..
True. Graphene transistors have been the miracle thingy for the last couple of decades. They have had a good run. Time for a newer and more exciting scam |
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Post by Baron von Lotsov on Sept 30, 2024 15:48:54 GMT
I heard in the news Huawei filed a patent for a graphene transistor about a year or so ago but I was never told of which patent in order to look it up and have since wondered whether it was a breakthrough or not. I found a useful video though which gives an overview of graphene transistor research. News articles never tell you the nitty gritty details. It turns out the problem for the last 20 years and why everyone has been held up so much is to do with Dirac points. Wiki has a rundown on what a Dirac point is. en.wikipedia.org/wiki/Dirac_cone
It's rather amazing the research was only experimentally verified 50 years later. The problem here is these points are where there is zero bandgap in momentum space. If one were to build a graphene transistor it would work like a tap you could not fully switch off, and that wastes leccy if you have millions of these things on a chip.
There are some ways thought to change the physical properties so we do get a band gap. One of them is employing Klein tunnelling.
But this method slows the switching speed right down, far worse than the conventional FET.
Now in 2024 we actually have a working transistor with a bandgap of 0.6Ev using some epitaxial technique. there is a bit more complication to it than mentioned, so you may want a full explanation which is here.
The first pattern taken out for Graphene transistors was 2004 its old hat BVL GFets have been out for decades..
The video I linked to also shows prior art, but for the reasons given in the video, these were impractical. This was the bandgap problem. I don't have details of the Huawei patent, but to be a patent, it would have to be original. There are many ways of doing it. |
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Post by Baron von Lotsov on Sept 30, 2024 15:50:07 GMT
The first pattern taken out for Graphene transistors was 2004 its old hat BVL GFets have been out for decades..
True. Graphene transistors have been the miracle thingy for the last couple of decades. They have had a good run. Time for a newer and more exciting scam What are you going to do for the rest of your life then? Sit in your armchair and call everything a scam? What good is that? |
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Post by jonksy on Sept 30, 2024 17:04:28 GMT
The first pattern taken out for Graphene transistors was 2004 its old hat BVL GFets have been out for decades..
The video I linked to also shows prior art, but for the reasons given in the video, these were impractical. This was the bandgap problem. I don't have details of the Huawei patent, but to be a patent, it would have to be original. There are many ways of doing it. There isn't uch need for stand alone tansistors in modern electronics, It's all chips and potted electronics these days.. |
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Post by besoeker3 on Sept 30, 2024 17:23:08 GMT
The video I linked to also shows prior art, but for the reasons given in the video, these were impractical. This was the bandgap problem. I don't have details of the Huawei patent, but to be a patent, it would have to be original. There are many ways of doing it. There isn't uch need for stand alone tansistors in modern electronics, It's all chips and potted electronics these days.. Not all. We used individual high power silicon units like this that I opened: i.imgur.com/3WrlIwb.jpg |
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Post by jonksy on Sept 30, 2024 17:31:58 GMT
There isn't uch need for stand alone tansistors in modern electronics, It's all chips and potted electronics these days.. Not all. We used individual high power silicon units like this that I opened: i.imgur.com/3WrlIwb.jpgI stand corrected I am not so well up on heavy duty electronics. I guess I am more knowlegable on the aviation side where size is a premium... |
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Post by besoeker3 on Sept 30, 2024 17:37:01 GMT
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Post by besoeker3 on Sept 30, 2024 17:41:49 GMT
I stand corrected I am not so well up on heavy duty electronics. I guess I am more knowlegable on the aviation side where size is a premium... No problem - it's just my particular field........ |
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