File:An old germanium transistorchip OC44.jpg
An_old_germanium_transistorchip_OC44.jpg (244 × 367 pixels, file size: 9 KB, MIME type: image/jpeg)
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Summary
[edit]DescriptionAn old germanium transistorchip OC44.jpg |
An old germanium based bipolar transistor, with the type designation OC44, with a view to the point contact chip. There was some silicone grease removed so the chip could be seen. A little of the silicone grease are still visible. (source: https://web.archive.org/web/20230107102751/https://sites.google.com/site/transistorhistory/Home/european-semiconductor-manufacturers/philips?pli=1 Quote: "...It [Philips] developed an all glass hermetic seal using silicone grease to protect the active elements and improve heat transfer...") The rectangular plate are the base in both senses. It is the actual base of the point contact transistor - and in the second sense it the terminal base. The front of the chip has a junction and on the back the chip has a second junction, that is why it is called a bipolar junction transistor - or short BJT. Today in modern bipolar silicium based planar transistors, the base terminal is not the physical base. Modern chips do not have visible junctions, the junctions are there, but they are below the surface of the transistorchip. The black lines at the top are a millimeter scale. |
Date | 11 March 2006 (original upload date) |
Source | No machine-readable source provided. Own work assumed (based on copyright claims). |
Author | No machine-readable author provided. Glenn assumed (based on copyright claims). |
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[edit]Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
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current | 22:32, 11 March 2006 | 244 × 367 (9 KB) | Glenn (talk | contribs) | An old germanium based bipolar transistor with a view to the point contact chip. The rectangular plate are the base in both senses. It '''is''' the actual '''base''' of the point contact transistor - and in the second sense it the terminal base. Today in |
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