Eric, I have a catalog right here from a major cap supplier....

The max thickness of an 0402 part is 24 mils or 0.6mm.  You'll need to add
the reflowed solderpaste thickness (and possibly board pad thickness?) to
get the max. height from the board, which may be what your customer is
really after.

Terri

> ----------
> From:         Eric Christison[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;Eric Christison
> Sent:         Tuesday, March 20, 2001 11:04 AM
> To:   [log in to unmask]
> Subject:      [TN] Height of 0402 devices
>
> Maybe someone out there can save me a few hours slog through catalogues
> and
> specs.
>
> We're selling an MCM which has 0402 caps and zero ohm links soldered onto
> the base. Our customer wants to impose a tight tolerance on the height of
> the parts. I think that the height of a generic 0402 can vary from 0.40mm
> to
> 0.80mm high. Is this correct or am I being pessimistic?
>
> Thanks,
>
>
>
> Eric Christison
> Mechanical Engineer
> Consumer & Micro Group - Imaging Division
> STMicroelectronics
> Aviation House
> 33 Pinkhill
> Edinburgh
> EH12 7BF
> UK
>
> Tel: +44(0) 131 336 6165
> FAX: +44(0) 131 336 6001
>
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