Which DEC machine made use of th pre Flip-Chip board?

Al Kossow aek at bitsavers.org
Fri Dec 21 10:51:01 CST 2018

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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