THE OVSHINSKY INVENTION (Feb, 1970)

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THE OVSHINSKY INVENTION

By Norman Carlisle

Is it greater than the transistor, or is this self-taught engineer a fraud as the big companies claim?

Everyone knew that glass was an insulator, not a conductor of electricity. Everybody, that is, except a controversial independent inventor named Stanford Ovshinsky. To the consternation of orthodox scientists he’s found a way to turn glass into a conductor—a discovery that may rival that of the transistor effect.

At least that’s what Ovshinksy and a number of fellow scientists and engineers claim, thereby starting a red-hot hassle among scientists.

Ovshinsky’s defenders maintain that in the “Ovshinsky effect” he’s hit on something completely original. Something big enough, they maintain, to create a second transistor revolution that will lead to the dreamed-of flat screen TV that will hang on your wall and a computer small enough to wear like a wristwatch.

Scoffers—among them many researchers for the nation’s big labs—say he’s claiming something they knew about all along. And that, anyway, it won’t work—at least not like he says it will.

“Sure they say that,” say Ovshinsky supporters. “It’s just sour grapes.”

Their chagrin in not having hit on the discovery first, if that’s what it is, is understandable if Ovshinsky’s claims work out as he vows they will. For what he has developed is a kind of device that will permit smaller, faster, simpler, and more reliable electronic circuitry than that made possible by that electronic marvel, the transistor. And what’s more, it’ll do it for far less than even the ever-decreasing cost of transistors, which use relatively expensive materials.

Ovshinsky’s transistor-like devices can be made of low-cost, easily-produced substances —like glass, for instance—which can be used to make “print on” conducting devices. A thin film of his semi-conducting material deposited on wire, metal blanks, or plastic sheet will create the equivalent of a transistor, opening up many design possibilities.

One thing that makes fellow scientists raise their eyebrows over Ovshinsky’s accomplishment is the fact that he doesn’t have a degree to his name. Following his graduation from high school, he had a few months of training at a trade school in Akron, Ohio, and then went to work in a factory as a machinist. In his early twenties he brashly announced that he knew a better way to make a drive for a particularly complicated machine.

Engineers laughed at this green kid, but they didn’t laugh long. He came up with a design involving electrical, hydraulic, and pneumatic servo-mechanisms that actually worked.

Before he was thirty, Ovshinsky was president of a big machine tool company. His machine became standard in the industry during the Korean war when it proved that it could turn out shell cases ten times faster than any other.

For all his success, Ovshinsky felt restless and confined inventing for other companies, even ones he had an interest in. He kicked over the traces to tackle the Big One, the idea that glass and related materials might be used in transistor-like devices. The problem facing him looked insurmountable. In the crystalline substances from which transistors are made, such as germanium and silicon, current is easily controlled because these materials are structured in neat lattices through which current can be made to flow predictably.

Materials like glass would never have anything like the transistor effect, most scientists were sure, because they are disorderly in structure, jumbled into helter-skelter arrangements. Surely, in such materials, electrons would be so isolated from each other that they could not join up to move in a steady stream, as required in transistors.

Ovshinsky had a bold idea about that. Maybe those disordered materials had a property nobody had really checked out. Perhaps there was some way to bring “short range order” into them. Suppose you shot an electric current of just the right voltage into them. Might it not change the material, per- mitting the electrons to join up and flow as a current?

After thousands of mathematical calculations and lab experiments, Ovshinsky emerged with the announcement that he had established the existence of the “Ovshinsky effect.” In layman’s terms it boils down to this: when you apply a certain voltage to a material of a given chemical composition, this material will be affected by this current and turned into a conductor.

The result is embodied in “Ovonic Switches,” for which the inventor has been granted patents. They are now being turned out by Ovshinsky’s company, Energy Conversion Devices, Inc., in Troy, Mich.

One type is the Ovonic Threshold Switch. It switches from blocking a current to conducting it in 150 trillionths of a second. The switch keeps conducting as long as the current through it exceeds a certain voltage. When the current drops below this voltage, the switch again blocks current rather than conducting it.

A second Ovshinsky invention is the Ovonic Memory Switch. It operates like the Threshold Switch, but it remains in the conducting condition even when the current is turned off. A pulse of electricity is required to convert it back to the blocking state. Ovshinsky sees it as being the “perfect” memory unit for computers. One of its main advantages is the fact that it’s blackout proof; it isn’t affected when the current goes off. Therefore a computer using Ovonic switches wouldn’t lose its memory in power failures, as many did in the big Northeastern U.S. blackout of ’65. (Continued on next page) All Ovshinsky switches have a property transistors lack. A transistor sends current in one direction only and therefore operates on D.C. or requires special adaption to operate on A.C. Ovonic switches operate on A.C., which makes them ideal for home use, Ovshinsky asserts. The inventor pictures small, cheap computer control units that will do the thinking for all kinds of household appliances—like, say, robot vacuum cleaners and lawnmowers.

Is Ovshinsky’s invention as big as many claim it is? Will Ovonic switches create, as Ovshinsky believes they will, a second transistor revolution? Will the scientific critics who say it really isn’t all that great be proved wrong?

Ovshinsky isn’t worried about the answers. His switches are being tried out in military hardware and a number of consumer products. Ovshinsky shrugs off the skeptics who doubt that they’ll really work.

“We’re going to prove that,” he says, with the confident smile that befits a man who’s sure he has invented something bigger than the transistor. •

9 comments
  1. Doug says: February 13, 200912:12 am

    “…is this self-taught engineer a fraud as the big companies claim?”

    Talk about making your critics eat their words!

    http://en.wikipedia.org…

  2. RagManX says: February 13, 200910:52 am

    The article caught my interest right up to the claims of flat-screen televisions you could hang on your wall and computers you could wear on your wrist. That’s just crazy talk.

    But dang, this is a cool little article. Wish I better understood all this talks about.

  3. Scott B. says: February 13, 200911:17 am

    Wow. This guy is my new hero. He should be more well-known! An inventor in the true American, bootstraps mold. Thanks for the link, Doug.

  4. MrG says: February 13, 200912:21 pm

    Stanford Ovshinsky is actually fairly well-known if you’re into solid-state. His amorphous semiconductor devices worked perfectly well, though the transistors are slow. Most cheap (low efficiency) solar cells are amorphous silicon. Ovshinsky never conquered the planet, but he was a pioneer in the development of “alternate” solid-state technologies, with “plastic” transistors being a growth market for research. (Nobody expects them to replace silicon either, but unlike silicon, plastic circuits could be printed onto a cardboard box.) Cheers — MrG / http://www.vectorsite.n…

  5. Marc says: February 17, 20098:06 am

    It was wrong to compare this invention to transistors. It would have been more honest to put that as another semi conductor invention that would work as well as transistor. So comparing that to transistor is a trap for simple minds… Who makes the public opinion. But what is a flat screen ? Just a transistor on a piece of glass.

  6. Miriam English says: April 27, 20102:43 pm

    He developed much of what became the light, flat, LCD screen you have in your laptop, along with the nickel metal hydride batteries that power it. He had success in producing cheap amorphous solar cells (I don’t understand why expensive crystalline ones marketed by the oil companies are the only ones you can buy anymore). He is one of the main movers trying to make the change to a hydrogen-powered economy, using hydrogen storage systems he developed. If you use re-writable CDs and DVDs, he developed those. His amorphous memory devices (the main focus of this article) exist and are in use today, though in my opinion under-utilised.

    This guy is still up and running and has his eye firmly fixed on making the world a better place, unlike many who just want to bleed it of profits. He was entirely self-taught, yet a leader and innovator in many fields. He was the child of refugee immigrants to USA — something those opposing immigration of refugees might do well to remember.
    Read more about him on Wikipedia http://en.wikipedia.org…

  7. Firebrand38 says: April 27, 20102:57 pm

    Miriam English: Just come out and say BP Solar. Crystalline ones are currently more efficient than thin-film amorphous ones.

    Who exactly opposes immigration by refugees? Last I heard the US program is still ticking along.

    Trouble with that last argument is it can be used in the negative when children of refugees screw up as well.

  8. Randy Vaught says: June 15, 201010:13 am

    Actually, I’ve known Mr. Ovshinsky for 40 years and trust me, he’s the real article.

  9. Plaguewatcher says: October 5, 20109:09 pm

    Dear Ms English.
    “Crystalline ones are currently more efficient than thin-film amorphous ones. ”
    but if they are more than 5 times the cost,, then the picture changes. Also Mr O has produced a three layer version that takes advantage of wider ranges of wavelength. flexible too. Look em up

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