1950s Transistor X-Ray Images
X-ray image depicting early 1950s transistor technologies. Transistors revolutionized the world of electronics and are the fundamental building blocks of electronic devices today. Left to right: 1953 Bell Labs/Western Electric original prototype of an A1689 point-contact transistor—marketed later as 2N23; a 1954 Sylvania 2N35 alloy junction transistor; and a 1955 Raytheon CK722 alloy junction transistor. Image taken with a ZEISS Xradia 620 Versa X-ray microscope.
—Herminso Villarraga-Gómez, Carl Zeiss Industrial Metrology, U.S.A.
