Artifact Details


Albert Blodgett Jr. examining 50mm square circuit module on an assembly line

Catalog Number



Still Image


1980 ca.


International Business Machines Corporation (IBM)

Identifying Numbers

Other number P4027


8 x 10 in.


Photographic print


This is a black and white image of a side profile shot of Albert Blodgett Jr. holding up a 50mm square ceramic chip in his left hand being produced on an assembly line. He is dressed in a business suit and looking at the chip and away from the camera. In the background is the manufacturing and assembly machine for the chips. Light is coming from the overhead ceiling. Tape on verso side of image is a press release sheet which states "MACHINE CASTS CERAMIC: Dr. Albert J. Blodgett, Jr., examines a 50 millimeter square circuit module at a continuous casting machine where production of the multi-layer ceramic multi-chip circuit modules used in IBM 4300 processors begins. The machine produces rolls of green (unfired) ceramic material from a liquid slurry consisting of alumina powder and glass frit combined with binders and solvents. The slurry is pumped into this 21-meter long machine where a "doctor blade" technique forms a thin uniform layer of ceramic material 215 millimeters wide and 0.2 or 0.28 millimeters thick on a continuously moving plastic conveyor. During this process, the slurry is dried while passing through a series of five drying ovens. Precise quality control of materials and process variables during fabrication is required to produce the green sheet stock, which is then cut and processed to form the 35 and 50 millimeter square circuit modules.". Also on the press sheet is "FOR RELEASE: April 29, 1980" and "FROM: IBM Corporation Data Systems Division East Fishkill Facility Hopewell Junction, NY 12533". Written on verso side in pencil on top left corner is "P4027".


Identification photograph; Publicity photograph


IBM 4300 (Computer); International Business Machines Corporation--History; Computer industry--United States; International Business Machines Corporation (IBM); Computer industry--United States--History

Lot Number