On 12/21/18 5:19 AM, Noel Chiappa via cctalk wrote: > The DEC brochure for it (P5141) is a little puzzling; it says (p. 2) that > "INTEGRATED CIRCUITS are basic elements of the low cost, newly designed > silicon FLIP CHIP modules used throughout PDP-7", but AFAIK, the first FLIP > CHIPs (R-series, B-series, etc) were all transistors; the later M-series were > the first ones to have ICs. Maybe this is some old meaning of "integrated > circuits"? The original "Flip Chip" was a packaging failure. It was literally a die bonded to a PCB and never went into production. I think it is mentioned in "Computer Engineering" IBM perfected the techniques to do this later with the development of solder bumps and IR reflow.
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