1. As a process qualification vehicle, should the vehicle be pure
surface mount, or mixed technology (both SMT and PTH), and why?
Speaking from design side I would say there needs to be 3 test
boards to match what we are sending out to you.
1 - Standard SMT .635mm pitch or greater leaded parts, and 0402
and larger discrete
2 - Leading Edge SMT .5mm pitch or smaller leaded parts, BGA,
uBGA, CSP, PowerSO's, 0505 caps,
0201 resistors.....
3 - Bleeding Edge all of the above with Fine Pitch (1.25mm and
.635mm) through hole
2. What would you add or subtract from the test board to make it more
useful to you?
SOT23, SC-70, TO263, Capacitor and Resistor Arrays, SMT Headers
3. Should there be two offerings of qualification vehicles, "cutting
edge" vs. "mainstream"? Cutting edge would incorporate fine pitch, flip
chips, CSPs, etc., where the mainstream board would not.
Three levels - as listed in item 1.
4. Extra Credit question: What was the greatest thing "before"
sliced bread?
Yeah, yeah, rig the test for the old guys ;-D. Talking Pictures,
Sliced Bread, Frozen Dinners, all pre-date by decades...
Jeffrey A McGlaughlin, CID
Engineering Designer
Battelle Memorial Institute
Columbus Ohio
http://www.battelle.org
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