Roberto,

                We're using SQFP240's (.5 mm or .020" pitch) here with the
following dimensions:

                Pad:            .084 x .014
                Solder Mask:    .094 x .024
                Paste Mask:     .084 x .014

                The solder and paste mask values are adjusted by our
manufacturer to suit their requirements.
                You can see that we're using a wider pad than you are,
although this leaves only about .006"
                between the pads. The wider pads take up the lateral
positional movement in the leads.
                These values seem to be working out well for us.

>  Michael Hiteshew
>  Lockheed Martin Launching Systems
>  [log in to unmask]
>  (410) 682-1259
>
        Roberto Nunes wrote:

> PQFP240 pins:
> I used to have this dimensions:
>
> PAD   50x10 mils
> SOLDER MASK 50x10 mils
> PASTE MASK   48x8 mils
>
> And they are asking me to use this:
>
> PAD   96x10 mils
> SOLDER MASK 96x10 mils
> PASTE MASK   94x8 mils
>
>  I would like to know which pad size you are using ...
>
>

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