Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Attention ESVA Patrons:

The Emilio Segrè Visual Archives’ site is moving soon and adopting an open access approach to digital image sharing. Once we have transitioned to the new site in 2021, we will no longer charge for our high-resolution digital images or usage fees (note that we do not hold copyright to all the images in our collections and you will still need to obtain permission for those which we do not own).

If you are working on a long-term project, we advise you to wait until the migration is complete so that you may obtain our copies for free. If you cannot wait, email us at nbl [at] aip.org and we will do what we can to assist you. We will not be offering refunds for past purchases.

For more information, please visit our FAQ page on the Ex Libris Universum blog. 

Brattain Walter C24

Share This


Brattain Walter C24

How will you use this image ?
Select one of the following options.
Individual Use
Not-for-profit Use
For-profit Use (educational only)
Not sure yet

We charge a usage fee per photo if the photo is published, reproduced in a product or publicly exhibited. This is not a license in the legal sense. As a non-profit institution, we do not make any money providing these photographs. It is only by assessing usage fees that we are able to cover the cost of providing publication quality copies of our photos, preserving the photograph collection according to archival standards, and providing access to the collection by maintaining an online image database. The copyright holder may charge a fee in addition to our service fee.

Images are for use in educational projects only and must be used in a respectful manner.

Image title: 
Transistor Inventors Drawing
Credit line: 
Drawing by S. Harris, Alcatel-Lucent/Bell Labs, courtesy AIP Emilio Segrè Visual Archives

'Twenty-five years ago -- December 23, 1947 -- three Bell Laboratories scientists succeeded in amplifying an electrical signal by sending it through a very specially prepared crystal of germanium. The event marked the invention of the transistor. The three inventors, John Bardeen, William Shockley, and Walter Brattain, in 1956 received the Nobel Prize in Physics for their work.'

Photo date: 
circa 1972
Original format: 
1 photographic print (black and white; 9.5 x 6 inches)
Brattain, Walter H. (Walter Houser), 1902-1987
Bardeen, John
Shockley, William, 1910-1989