Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


8 mil pitch lead frame Device? Where?

Jon Medernach

#14319

8 mil pitch lead frame Device? Where? | 12 September, 1998

I am aware that the Intel processor is available in a 0.012" leadframe, as a TAB product ( which can be excised and placed with may P&P machines but I do not know of any 0.008" leadframes, Bumped Die are at these pitches and frankly I would bet dimes to dollars that Juki(Zeva), Tenyru (Amistar) or Yamaha (Philips) can not provide a 3 sigma process. Drive mechanism aside the linear encoder on the axis is the way to go but the run out in the Z axis and the force control in the Z prevents the use of these machine. YOU GET WHAT YOU PAY FOR. 8 mil pitch FC attach requires accuracy of +/- 25microns or better, guys we are talking Die Bonders. Users want a $150K machine to do FC, .012" pitch and 30K/ hour and there will always be someone who will say "sure we can do that" (once, but not in production and only when the Moon (not Earl) is in the right phase) The old saying goes, "If you try to be all things to all people, you end up being nothin to nobody" Thanks

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Wayne Bracy

#14321

Re: 8 mil pitch lead frame Device? Where? | 14 September, 1998

Jon: What stimulated this? It's okay to pick on Earl, but explain who is placing .008" pitch. Sounds like the olde hybrid guys? Always looking for cheap equipment to do hi-rel production. Wayne

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Wayne Bracy

#14320

Re: 8 mil pitch lead frame Device SORRY | 14 September, 1998

Jon: Sorry, that's what I get for fishing all weekend long, did not read down the forum ........... Wayne

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Earl Moon

#14322

Re: 8 mil pitch lead frame Device? Where? | 14 September, 1998

| Jon: | What stimulated this? It's okay to pick on Earl, but explain who is placing .008" pitch. Sounds like the olde hybrid guys? | Always looking for cheap equipment to do hi-rel production. | Wayne Wayne, I resemble that remark. Jon, That's a bunch of neat information. I do appreciate it and didn't think about some of the things you remarked - Z axis as an example. I certainly agree concerning "all things" and "you only get what you pay for." Thanks, but I must ask if you know whatever happened to Tape Pack from National? Back in the good old days (1987 or so) these guys provided devices to 8 mil pitch that were excised and tested on the fly for placement. We tried and failed at Maxtor with these devices. There were no placement capabilities up to the task. Earl Moon

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