PCB footprints

[Matt Cohen]

I'm preparing a board design to send to a PCB vendor. I've never done
this before. I was told I need to supply them with the footprint for
each part. Now, some parts that I have come in packages like TQFP,
which I know are not standard, so I found a detailed drawing of the
particular package. But what about packages like TO-263 for a voltage
regulator? Are all packages not standard, should I supply drawings
for every part? What about capacitors? I don't know a footprint (or
even part number) for them, I just need small surface mount caps. Any
advice would be appreciated.
Matt

 

[Tom Biasi]

"Matt Cohen" <matthewlawrencecohen@yahoo.com> wrote in message
news:81fdc5f7.0407201413.2ca6c87c@posting.google.com...

I'm preparing a board design to send to a PCB vendor. I've never done
this before. I was told I need to supply them with the footprint for
each part. Now, some parts that I have come in packages like TQFP,
which I know are not standard, so I found a detailed drawing of the
particular package. But what about packages like TO-263 for a voltage
regulator? Are all packages not standard, should I supply drawings
for every part? What about capacitors? I don't know a footprint (or
even part number) for them, I just need small surface mount caps. Any
advice would be appreciated.
Matt

Hi Matt,
The vendor will only put on copper what you give him.(her, it)
All footprints need to be to your specs on the original drawings.
The packages that you mention as well as any other components have footprint
specs.
Look them up an reflect them in your drawings.
If they have a spec number, they *are* standard.
Good Luck,
Tom

 

[Randy Day]

Tom Biasi wrote:

"Matt Cohen" <matthewlawrencecohen@yahoo.com> wrote in message
news:81fdc5f7.0407201413.2ca6c87c@posting.google.com...

I'm preparing a board design to send to a PCB vendor. I've never done
this before. I was told I need to supply them with the footprint for
each part. Now, some parts that I have come in packages like TQFP,
which I know are not standard, so I found a detailed drawing of the
particular package. But what about packages like TO-263 for a voltage
regulator? Are all packages not standard, should I supply drawings
for every part? What about capacitors? I don't know a footprint (or
even part number) for them, I just need small surface mount caps. Any
advice would be appreciated.
Matt

Just a thought; does the vendor want the
footprints for silkscreening purposes?
Maybe they don't want them for anything
actually technical...

Hi Matt,
The vendor will only put on copper what you give him.(her, it)
All footprints need to be to your specs on the original drawings.
The packages that you mention as well as any other components have footprint
specs.
Look them up an reflect them in your drawings.
If they have a spec number, they *are* standard.
Good Luck,
Tom