If you have a note stating 'FAB SHALL BE IN ACCORDANCE WITH IPC 6012 CLASS __ ' , then the copper thickness requirements are per the above callout and don't need to be restated unless you need to take exception to that specific attribute of 6012. Also as a 6012 committee member, I would discourage calling PTH copper plating thickness by weight. Its confusing to fabs and unlike IPC it lacks a min avg thickness callout supplemented by an abs min thickness callout. If you take exception to IPC for PTH thickness it's best to use a linear dimension for thickness rather than weight equivalent.
Sent from my iPhone
> On Jun 28, 2016, at 7:30 AM, Dave <[log in to unmask]> wrote:
>
> Shouldn't one also indicate the "FINISHED HOLE THICKNESS AFTER PLATING .... xxx.yy ..." otherwise you leave this decision to the PCB Fab?
> My 2 cents.
> Dave
>
> From: "McGlaughlin, Jeffrey A" <[log in to unmask]>
> To: [log in to unmask]
> Sent: Monday, June 27, 2016 9:52 AM
> Subject: Re: [DC] Copper Thickness in Plated thru-holes
>
> We use a note reading "MINIMUM HOLE WALL PLATING TO BE 0.001[25μm] THICK IN ACCORDANCE WITH IPC-6010 SERIES SPECIFICATIONS FOR CLASS 3 REQUIREMENTS FOR COPPER PLATING." There is a pull down listing for 0.0008 [20μm], 0.001[25μm], and 0.002 [500.001[25μm] above 0.002 need to be "As Agreed to ..." Remember to verify drill size and annular ring requirements are achievable with the heavier plating.
>
>
> Thank you,
> Jeffrey
>
> Jeffrey McGlaughlin, C.I.D.
> Engineering Designer
> Mission and Defense Technologies
> Office: 614.424.7582| Fax: 614.458.7582
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>
>
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Hines, Kitty
> Sent: Monday, June 27, 2016 12:38 PM
> To: [log in to unmask]
> Subject: [DC] Copper Thickness in Plated thru-holes
>
> Good Morning,
> I hope you are all doing well these days. I have a question I'm sure you can answer... What is the best way to define a min. value for copper thickness/weight in plated thru-holes? Specifically for Power boards that require more copper. I can refer to IPC docs for process and acceptability, but need to add a specific note to our Fabrication drawing calling for something close to 2 oz copper for plated holes.
> Thanks in advance for your help,
> Kitty
>
> Kitty E Hines
> ECAD Librarian/PCB Designer CID
> 576 Lamont Road
> Elmhurst, IL 60126
> (630) 279-3600 x6655
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