Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor RF Cafe Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave RF Cafe Software Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!
Noisecom



ConductRF Phased Matched RF Cables - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Innovative Power Products Resistors Terminations

Bell Labs - Germanium Refining
May 1954 Radio & Television News

May 1954 Radio & TV News
May 1954 Radio & Television News Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919-1959. All copyrights hereby acknowledged.

Bell Telephone Laboratories (Bell Labs), having been responsible for creating the first positive amplification point contact transistor just before Christmas 1947, continued to lead the way in semiconductor research and new product announcements for many decades. This little tidbit was tucked away at the bottom of page 120 in the May 1954 issue of Radio & Television News magazine. It reported on "the purest substances in the world" being created there in the form of 99.99999999% (aka 10N) pure germanium crystals, which are used as seed for growing boules for device production. That's one rogue impurity atom in ten billion germanium atoms. Modern monocrystalline silicon boules are typically 7N or better.

Bell Labs Germanium Refining

Bell Labs Germanium Refining, May 1954 Radio & Television News - RF CafeThe purest substances in the world - 99.99999999 per-cent pure - are being made at Bell Labs by means of a new and simple refining method developed there. These substances have only one atom of impurity in ten billion atoms of the material - about the same as a pinch of salt in 35 freight cars of sugar. The new process is being used in refining germanium for transistors. W. G. Pfann, left, inventor of the "zone-melting" process, is shown operating the equipment while J. H. Scaff holds single crystal of purified germanium.

 

Posted June 4, 2020

Bell Telephone Laboratories Infomercials
TotalTemp Technologies (Thermal Platforms) - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: AirplanesAndRockets.com

My Daughter's Website: EquineKingdom

Temwell Filters

RF Cascade Workbook 2018 by RF Cafe

everythingRF RF & Microwave Parts Database (h1)