Slashdot Mirror
Transparent Transistors Are Coming
Roland Piquepaille writes "Transparent electronics is an emerging technology which aims to produce invisible electronic circuits. Now, researchers from Oregon report they made a major advance in transparent electronics. Their zinc-tin-oxide 'thin-film' materials are amorphous, physically robust, chemically stable and cheap to produce at just above room temperature. These new materials and transistors offer many new possibilities for consumer electronics, transportation, business and the military."
Roland Piquepaille and Slashdot: Is there a connection?
I think most of you are aware of the controversy surrounding regular Slashdot article submitter Roland Piquepaille. For those of you who don't know, please allow me to bring forth all the facts. Roland Piquepaille has an online journal (I refuse to use the word "blog") located at www.primidi.com . It is titled "Roland Piquepaille's Technology Trends". It consists almost entirely of content, both text and pictures, taken from reputable news websites and online technical journals. He does give credit to the other websites, but it wasn't always so. Only after many complaints were raised by the Slashdot readership did he start giving credit where credit was due. However, this is not what the controversy is about.
Roland Piquepaille's Technology Trends serves online advertisements through a service called Blogads, located at www.blogads.com. Blogads is not your traditional online advertiser; rather than base payments on click-throughs, Blogads pays a flat fee based on the level of traffic your online journal generates. This way Blogads can guarantee that an advertisement on a particular online journal will reach a particular number of users. So advertisements on high traffic online journals are appropriately more expensive to buy, but the advertisement is guaranteed to be seen by a large amount of people. This, in turn, encourages people like Roland Piquepaille to try their best to increase traffic to their journals in order to increase the going rates for advertisements on their web pages. But advertisers do have some flexibility. Blogads serves two classes of advertisements. The premium ad space that is seen at the top of the web page by all viewers is reserved for "Special Advertisers"; it holds only one advertisement. The secondary ad space is located near the bottom half of the page, so that the user must scroll down the window to see it. This space can contain up to four advertisements and is reserved for regular advertisers, or just "Advertisers". Visit Roland Piquepaille's Technology Trends (www.primidi.com) to see it for yourself.
Before we talk about money, let's talk about the service that Roland Piquepaille provides in his journal. He goes out and looks for interesting articles about new and emerging technologies. He provides a very brief overview of the articles, then copies a few choice paragraphs and the occasional picture from each article and puts them up on his web page. Finally, he adds a minimal amount of original content between the copied-and-pasted text in an effort to make the journal entry coherent and appear to add value to the original articles. Nothing more, nothing less.
Now let's talk about money.
Visit http://www.blogads.com/order_html?adstrip_category =tech&politics= to check the following facts for yourself. As of today, December XX 2004, the going rate for the premium advertisement space on Roland Piquepaille's Technology Trends is $375 for one month. One of the four standard advertisements costs $150 for one month. So, the maximum advertising space brings in $375 x 1 + $150 x 4 = $975 for one month. Obviously not all $975 will go directly to Roland Piquepaille, as Blogads gets a portion of that as a service fee, but he will receive the majority of it. According to the FAQ, Blogads takes 20%. So Roland Piquepaille gets 80% of $975, a maximum of $780 each month. www.primidi.com is hosted by clara.net (look it up at http://www.networksolutions.com/en_US/whois/index) . Browsing clara.net's hosting solutions, the most expensive hosting service is their Clarahost Advanced (
http://en.wikipedia.org/wiki/Transistors
Zinc Tin Oxide sounds alot like indium tin oxide (ITO) which is pretty commonly used, but has commonly known downsides. I don't think this is all that impressive.
It appears that every single article submitted to Slashdot by Roland Piquepaille is accepte
It does, doesn't it. Yet for the sums in question I don't really think that Slashdot media inc. (OSDN or whatever they're called this week) would be taking a backhander from him in order to get them published. Or, if they are, can they please open the channel up? I know a whole shitload of people that'd pay $100 a pop to put stories on Slashdot. Oh yes.
Dave
I write a blog now, you should be afraid.
From the abstract :
:-) which is not the purpose of the research anyway.
Transparent thin-film transistors (TTFTs) with an amorphous zinc tin oxide channel layer formed via rf magnetron sputter deposition are demonstrated. Field-effect mobilities of 5-15 and 20-50 cm^2 V^-1 s^-1 are obtained for devices post-deposition annealed at 300 and 600 C, respectively. TTFTs processed at 300 and 600 C yield devices with turn-on voltage of 0-15 and -5-5 V, respectively. Under both processing conditions, a drain current on-to-off ratio greater than 10^7 is obtained. Zinc tin oxide is one example of a new class of high performance TTFT channel materials involving amorphous oxides composed of heavy-metal cations with (n-1)^d10 ns^0 (n>=4) electronic configurations. ©2005 American Institute of Physics
For comparison pusposes positive carrier mobility in silicon is about 500 cm^2 V^-1 s^-1 and for negative charges (aka electrons) it is about 800. This means that this transparent dvice technology is on the order of 10 - 50 times slower than silicon. Not good for new CPU's
What's of much more interest and is not mentioned in the abstract is what the gain of these devices are and what kind of current density they can handle.
The "drain current on-to-off ratio" is sort of an odd thing to put in the paper. I mean if the off current is 1pA then the on current is 10uA (woo-hoo). If they made an actual transistor they should be able to present very standard benchmark values like gain, cut-off frequency and breakdown voltages.
So I'm not actually convinced they created a bonafide device, but maybe just characterized the films for use as a potential semiconductor, in which case they have a long way to go. They need to dope the material, attach a gate, etc... all things which could cause all sorts of complications.
Absolute statements are never true
You realize this is just a canned response that's in a lot (1 2 3) of his threads, right? If you look at the post, you'll notice that the AC didn't even bother to change As of today, December XX 2004, the going rate to the current date.