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Surface-barrier_transistor abstract "The surface-barrier transistor is a type of transistor developed by Philco in 1953 as an improvement to the alloy-junction transistor and the earlier point-contact transistor. Like the modern Schottky transistor, it offered much higher speed than earlier transistors and used metal–semiconductor junctions (instead of semiconductor–semiconductor junctions), but unlike the schottky transistor, both junctions were metal–semiconductor junctions.Philco used a patented process of applying two tiny electrochemical jet streams of liquid indium sulfate (electrolyte solution) on opposite sides of a thin strip of N-type germanium base material. This process would etch away and form circular well depressions on each side of the N-type germanium base material, until the germanium base material was ultra thin and having a thickness of approximately a few ten-thousandths of an inch. After the etching process was finished, the polarity applied to the electrolyte was reversed, resulting in metallic indium being electroplated into these etched circular well depressions, forming the transistor's emitter and collector electrodes. The Philco surface-barrier transistor was the world's first high-frequency transistor to be developed and was capable of obtaining frequencies up to 60 MHz.The world's first all-transistor car radio, was developed and produced by Chrysler and Philco in 1955. Chrysler offered this all-transistor car radio, Mopar model 914HR, available as an "option" in the fall of 1955, for its new line of 1956 Chrysler and Imperial cars. Philco was the manufacturer of these all-transistor car radios for the Chrysler Corporation and had also used its surface-barrier transistors in the radio's circuitry design.".
Surface-barrier_transistor thumbnail Philco_Surface_Barrier_transistor=1953.jpg?width=300.
Surface-barrier_transistor wikiPageExternalLink PhotoGallery_A01.htm.
Surface-barrier_transistor wikiPageExternalLink PhotoGallery_SurfaceBarrier.htm.
Surface-barrier_transistor wikiPageExternalLink patents?vid=USPAT2843809&id=m_9SAAAAEBAJ&jtp=1.
Surface-barrier_transistor wikiPageExternalLink patents?vid=USPAT2876184&id=bl5aAAAAEBAJ&&jtp=1.
Surface-barrier_transistor wikiPageID "8640719".
Surface-barrier_transistor wikiPageLength "16971".
Surface-barrier_transistor wikiPageOutDegree "29".
Surface-barrier_transistor wikiPageRevisionID "675043681".
Surface-barrier_transistor wikiPageWikiLink Alloy-junction_transistor.
Surface-barrier_transistor wikiPageWikiLink Category:1953_introductions.
Surface-barrier_transistor wikiPageWikiLink Category:Transistor_types.
Surface-barrier_transistor wikiPageWikiLink Chrysler.
Surface-barrier_transistor wikiPageWikiLink DATAR.
Surface-barrier_transistor wikiPageWikiLink Diffusion_transistor.
Surface-barrier_transistor wikiPageWikiLink Explorer_1.
Surface-barrier_transistor wikiPageWikiLink Indium(III)_sulfate.
Surface-barrier_transistor wikiPageWikiLink Indium_sulfate.
Surface-barrier_transistor wikiPageWikiLink Jet_Propulsion_Laboratory.
Surface-barrier_transistor wikiPageWikiLink Metal.
Surface-barrier_transistor wikiPageWikiLink P-n_junction.
Surface-barrier_transistor wikiPageWikiLink Philco.
Surface-barrier_transistor wikiPageWikiLink Plessey.
Surface-barrier_transistor wikiPageWikiLink Point-contact_transistor.
Surface-barrier_transistor wikiPageWikiLink P–n_junction.
Surface-barrier_transistor wikiPageWikiLink Route_Reference_Computer.
Surface-barrier_transistor wikiPageWikiLink Schottky_transistor.
Surface-barrier_transistor wikiPageWikiLink Semiconductor.
Surface-barrier_transistor wikiPageWikiLink Seymour_Cray.
Surface-barrier_transistor wikiPageWikiLink Transistor.
Surface-barrier_transistor wikiPageWikiLink UNIVAC_LARC.
Surface-barrier_transistor wikiPageWikiLink Vanguard_1.
Surface-barrier_transistor wikiPageWikiLink Vanguard_I.
Surface-barrier_transistor wikiPageWikiLink File:Chrysler_Imperial_motor_life_1955_Sept-all_transistor_radio.jpg.
Surface-barrier_transistor wikiPageWikiLink File:Chryslyer_imperial_all_transistor_car_radio_audio_sound_news_clip.ogg.
Surface-barrier_transistor wikiPageWikiLink File:Philco_SB100_surface_barrier_transistor_ad=1955.jpg.
Surface-barrier_transistor wikiPageWikiLink File:Philco_Surface_Barrier_transistor=1953.jpg.
Surface-barrier_transistor wikiPageWikiLink File:Philco_surface_barrier_-_Univac_Transtec_test_computer--1957.jpg.
Surface-barrier_transistor wikiPageWikiLink File:Sprague_SB100_transistor.jpg.
Surface-barrier_transistor wikiPageWikiLink File:Univac_LARC_supercomputer_circuit_board=1960.JPG.
Surface-barrier_transistor wikiPageWikiLinkText "Surface-barrier transistor".
Surface-barrier_transistor wikiPageWikiLinkText "surface-barrier germanium transistor".
Surface-barrier_transistor wikiPageWikiLinkText "surface-barrier transistor".
Surface-barrier_transistor hasPhotoCollection Surface-barrier_transistor.
Surface-barrier_transistor wikiPageUsesTemplate Template:Clear.
Surface-barrier_transistor wikiPageUsesTemplate Template:Reflist.
Surface-barrier_transistor subject Category:1953_introductions.
Surface-barrier_transistor subject Category:Transistor_types.
Surface-barrier_transistor hypernym Transistor.
Surface-barrier_transistor type Type.
Surface-barrier_transistor type Transistor.
Surface-barrier_transistor type Type.
Surface-barrier_transistor comment "The surface-barrier transistor is a type of transistor developed by Philco in 1953 as an improvement to the alloy-junction transistor and the earlier point-contact transistor.".
Surface-barrier_transistor label "Surface-barrier transistor".
Surface-barrier_transistor sameAs m.027c4bf.
Surface-barrier_transistor sameAs Q7645896.
Surface-barrier_transistor sameAs Q7645896.
Surface-barrier_transistor wasDerivedFrom Surface-barrier_transistor?oldid=675043681.
Surface-barrier_transistor depiction Philco_Surface_Barrier_transistor=1953.jpg.
Surface-barrier_transistor isPrimaryTopicOf Surface-barrier_transistor.