21 Dec
2018
21 Dec
'18
8:51 a.m.
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.