Mike,
I would also mark:
* any reference to internal standards
* instructions clarifying any funky ECO, that adds parts non-existent in the artwork, that are assembled in weird positions. If this is not the case, I would still mark a history of the revisions and the ECO numbers
* any reference to instructions on components that have special forming
* who provides the serial number structure (customer or CEM) and reference to the documentation on how to create the labels
Besides that, I will revise our instruction set, to include some of Richard's notes.
Regards,
Ioan
> -----Original Message-----
> From: TechNet [SMTP:[log in to unmask]] On Behalf Of Stadem, Richard
> Sent: Wednesday, November 16, 2005 9:25 AM
> To: [log in to unmask]
> Subject: Re: [TN] Assembly Drawing Notes?
>
> Hi, Mike.
> Here are some other standard notations, if they apply.
> All finished dimensional limits, such as maximum component height, to
> avoid any interference fit issues. Maximum lead protrusion for any
> through-hole parts. Conformal coating type, method of application,
> hardness, and keep-out areas. Which components are to be epoxy staked,
> and method (spec number). If flipchips are present, the requirement for
> underfill and globtop should be in the notes. Torque settings for screws
> and other hardware are often overlooked. Some people put programmed part
> notations on the drawing, so the documentation person does not overlook
> that step on the traveler or routing (nothing worse than having several
> hundred assemblies built up with Eproms not yet programmed). Design 0,0
> point and XY coordinates of tooling holes is standard on all assembly
> drawings. Thermal heatsinks should be noted on components that require
> them, and the thermal grease, sil-pad, etc. noted.
> Pin 1 notations (connectors) should be noted, and polarity should always
> be easily seen. The location for marking the serial number, revision,
> and the method is standard boilerplate. Handling to an ESD spec and to
> an MSD spec and the appropriate Mil-handbook is always noted, and the
> ESD symbol is on every assembly drawing with ESD parts.
> And of course, the revision history and ECN listing must be on every
> drawing. Statements of proprietary, classified information, copyright,
> and ITAR warnings should be present if they apply. Dimensions are to be
> noted as to millimeters or inches. Method of creation is always a good
> idea (Mentor Graphics EN2004, for example).
> I'm sure I've missed something here, but that is all I can think of. Any
> others out there?
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Michael McMonagle
> Sent: Wednesday, November 16, 2005 7:32 AM
> To: [log in to unmask]
> Subject: [TN] Assembly Drawing Notes?
>
> We are updating some PCBA assembly drawings, and looking for a little
> guidance on notes to include on the drawings. Current standard notes
> include:
>
>
>
> - Solder alloy required
>
> - Assembly processes to be in accordance with latest rev
> ANSI/J-STD-001 Class XX
>
> - Workmanship to be in accordance with latest rev IPC-A-610
> Class
> XX
>
>
>
> Other than additional notes for idiosyncrasies specific to a given
> assembly, are there any other 'boilerplate' notes we should incorporate?
>
>
>
> Mike McMonagle
>
> Quality Engineer
>
> OYO Geospace
>
> 7007 Pinemont Drive
>
> Houston, TX 77040
>
> 713-986-8650
>
>
>
>
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