Matthew,

We are going thru the same phase here in our plant.

Where we are today is that we will use the IPC-SM-782 as a starting point
and go from there. Our first episode went well. We got pad design
recommendations from the mfgr (NEC) to fine tune the design. We are now
looking into other mfgr recommendations, and the reps are not able to find
anything for this.

As we are in the infant stage of SM process in-house, we are taking extra
precaution to make sure we are designing something that will work.

Bottom line is, we have found it beneficial to blend mfgr and IPC info. Of
course if we can find any mfgr recommendations.

Hope this helps, and good luck.

Richard Hamilton
Clemar Mfg. / Rain Bird
[log in to unmask]

> -----Original Message-----
> From: Matthew Lamkin [SMTP:[log in to unmask]]
> Sent: Thursday, January 21, 1999 12:07 AM
> To:   [log in to unmask]
> Subject:      [TN] SMT land pattern standards?
>
> Hi there all you IPC guys, can someone help me to determine what the
> best collection
> of standard SMT land pattern designs is?
>
> I use convection reflow on a QUAD machine for the majority and will
> shortly be using wave solder on a BLUNDELL machine.
>
> We are having a few problems that are being claimed as wrong footprint
> sizes, and to be honest this could be true as
> the footprints were not entered into our CADSTAR cad system in-house.
>
> There seems to be little published material available in the U.K. as
> complete documents to specify
> sizes for the most commonly used devices & I was wondering if anyone
> could tell me what the IPC-SM-782A
> document is like ?
>
> I.E. how many components does it cover & how much detail does it give
> for each one ? Does it give clear differences
>       between each soldering method & how good are these footprint
> sizes?
>
> Any footprints that have been designed in-house have come from differing
> manufacturers data books that could
> be out of date or the component could come from differing manufacturers.
>
> Any help is appreciated.
>
> T.T.F.N
>
> Matthew Lamkin
> Printed Circuit Board Draughtsman
> Protec Fire Detection PLC
> Churchill Way,
> Nelson, Lancs
> BB9 6RT.
> Tel 01282 717393
> Fax 01282 717273
> Email = [log in to unmask]
>
> Company Web Site = http://www.protec-fire-detection.plc.uk
>
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