K
Keith R. Williams
Not entirely.
Counter example? (though perhaps "socketed" is a better term)
Not entirely.
Keith R. Williams said:Purchased, socketed, manufactured and tested, closer to a
dollar apiece.
X86 processors are still PGA. The marketing model still
demands it. Certainly BGA would be cheaper.
What killed 'em was when it dropped to a half-dozen per
machine. The economy of scale went all to hell. ;-)
~1K pins still amazes me. 1K balls, less so.
You remember differently that I (a dime wouldn't have made me look again,Maybe CPUs, but 74xx logic and DRAM was closer to the dime.
I was referring to how the dice are mounted on the PGA carrier. They're
not laced in, but AFAIK more like BGA.
A victim of it's own success
Hey, lift the cover on a ZIF socket -- familiarity breeds contempt
AFAIK, PGA packages are made exactly the same: pot the pins in PCB,
print a few layers (SMT otional) and microBGA the die on.
Keith R. said:Counter example? (though perhaps "socketed" is a better term)
Intel's new LGA Prescotts? (the pins are on the "socket")
keith said:Ziff *sockets* are a bit different. They remind me more of
"a thousand" tiny bobby pins.
Counter example? (though perhaps "socketed" is a better term)
Off the top of my head, Geode, AMD SC400, and Via's C3 come in BGA
packages.
They used to be that way. Now, ZIF sockets have pins
with a half-moon "C" head to connect with the CPU pins.
You cam probably comment better on PCB routing issues. That's a _lot_ of
traces even after half the pins are tied to only ground or Vcc. Still,
better than the equivalent Northbridge 'cuz no ~100 from the CPU!
Not entirely.