Richard,
Try looking in the JEDEC Publication 95, under the CO- and CS- standards.
They specify which tray size and type are applicable for what size QFP,
TSOP, TSSOP, and BGA components (tube packaging is also included). You can
find these at the IPC/JEDEC website at: http//:www.jedec.org . You will
also find that some vendors do not always use JEDEC registered packaging.
> Howard A. Cyker
> Lucent Technologies
> Email [log in to unmask]
> Phone 978-960-2964
>
>
> ----------
> From: Hamilton, Richard CLE 4454[SMTP:[log in to unmask]]
> Reply To: TechNet E-Mail Forum.;Hamilton, Richard CLE 4454
> Sent: Thursday, November 04, 1999 7:06 PM
> To: [log in to unmask]
> Subject: [TN] QFP Tray Packaging
>
> Hello all again,
>
> One day I will learn how to 'speak' English. I apologize for not making
> myself clear the first time around.
>
> I am not looking for specifications for the component packaging, I need to
> find out what industry standards there are for the presentation of the
> components to automatic equipment. In other words, QFP's come on trays,
> what
> is the specification for the trays that these come in.
>
> i.e.,
> What is the minimum and maximum size of tray?
> What polarity marking should one expect to find on a tray?
> What, if any, quantity of mixed oriented devices are allowed in a tray
> from
> the distributor/manufacturer?
> What is the relationship of tray polarity to device polarity?
> What size devices are expected in what size tray?
>
> Like tape and reel specs for thru-hole packing. I have only found the
> IPC-481 series which deals with the carrier taping. I believe I have that
> much under control, however I do need to address trays and tubes at least.
>
> Maybe I am out to lunch on this issue? (Is that why I am this big?) I know
> we made good use of industry standards for TH tape and reel specifications
> and I am assuming (LOOK OUT!!) and/or hoping that there are similar
> documents in the SM world!?
>
> My immediate issue comes from the fact that we are getting some QFP's with
> all the devices oriented in the same direction to each other, however,
> that
> direction may not always be the same relative orientation to the tray they
> are supplied in. I need to tell our vendors we want all parts supplied
> with
> the same orientation, but I do not want to re-invent the wheel so to
> speak!
> (OK, who said that.... I am not lazy,....well.....OK.....when you put it
> that way!)
>
> Still lost and flapping my wings!
>
> Richard Hamilton
> Clemar Mfg. / Rain Bird
> [log in to unmask]
>
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