Solid Logic Technology (SLT) wafers [manufacturing-step examples]

Prev
Next
Image Zoom
  • Details
  • Description
Date Introduced
1964
Photographer
Richards, Mark
Dimensions
overall: 1 3/4 in x 9 1/4 in x 4 5/8 in
Manufacturer
International Business Machines Corporation (IBM)
Copyright Owner
© Mark Richards
Location
United States
Keywords
Manufacturing; Ceramic; Hybrid; transistor; Bloch, Erich
Object ID
102662452

In System/360, SLT modules replaced discrete-transistor circuits. They were “hybrid,” not integrated circuits — separate transistors and diodes combined with printed resistors on a ½” square ceramic substrate. Complex to manufacture, they were faster and used less power than discrete-transistor circuits.