atari email archive

a collection of messages sent at Atari from 1983 to 1992.

FYI: Surface-mount IC's - PCB processing

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The Atari PCB line is building about 650 NAMCO-designed Rolling Thunder
PC Boards. Each Rolling Thunder PCB has (2) surface mount devices (SMD).
They are plastic flat packs with gull-wing leads. Each SMD has 80 pins
on 20-25 mil centers; there are 24 leads on two sides and 16 leads on the
other two sides.

Normally, the SMD's are attached first, using "vapor-phase" or "re-flow"
equipment, and then the pin-in-hole parts are wave-soldered as a second step.
To do this successfully however, requires the use of certain types of fluxs
during wave-solder and a FREON wash after wave-solder. Since Atari does not
have the  right flux/wash, we cannot use that processing method. Instead, the
PCB's will be wave soldered here at Atari as usual, then the PCB's will be sent
out to have the SMD's attached as a second step. They will hand-solder each pin
of the SMD. The Cost: $3.00 per PCB ($1.50 per part). 

Surface mount correction

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Put it in print and it's bound to be wrong. The 80-pin SMD's in Rolling
Thunder are being soldered on at a cost of $3.00 each, total of $6.00 per
board, not the originally quoted $1.50 each, $3.00 per board. 
Message 1 of 2

Apr 01, 1987