4 ms·
Method and apparatus for controlling electric currents (1925) [pdf]
- tudorw 9y agoWould anyone care to enlighten me as to the significance of this ?
- robotresearcher 9y agoCurrent affairs.
- tudorw 9y agocurrent to whom ? no thanks to you
- deleted 9y ago[deleted]
- robotresearcher 9y agoI thought the pun was patently obvious.
- tudorw 9y agoI got that one ;)
- stdbrouw 9y agoThe invention of the transistor.
- tudorw 9y agothanks, a little brief but thanks :)
- dvh 9y agoThe field-effect transistor was first patented by Julius Edgar Lilienfeld in 1926 and by Oskar Heil in 1934, but practical semiconducting devices (the junction field-effect transistors [JFETs]) were developed later after the transistor effect was observed and explained by the team of William Shockley at Bell Labs in 1947, immediately after the 20-year patent period eventually expired.
- tudorw 9y agothank you :)
- abainbridge 9y ago> A convenient way of providing the film over the coatings 11 and 12 and the electrode 13 is to spatter metallic copper by heating copper wire with in a vacuum, or by depositing copper from a colloidal suspension, over the entire upper surface and then sulphurizing the deposited copper in sulphur vapor, or by exposure to a suitable gas as hydrogen sulphide or a liquid containing sulphur, as sulphur dissolved in carbon bisulfide. Nice use of the word "convenient" to mean "impossible to almost everyone, even 100 years in the future". Still, it's a lovely piece of writing compared to most modern patents I've seen.
- bocklund 9y agoSeems really easy if you have sputtering equipment, which has been around for awhile. Unless by almost everyone you mean garage hobbyists.