I agree with Don.
This is why the wrap spec was not altered.
Jim
-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Dupriest,
Don
Sent: Tuesday, August 17, 2010 5:48 PM
To: [log in to unmask]
Subject: Re: [IPC-600-6012] Class 3/A requirements
That is what I recall as well; it does not get added to wrap.
C. D. (Don) Dupriest
Lockheed Martin - MFC
Advanced Manufacturing Technology
member of:
Production Technical Excellence Staff
Ph. 972/603-7724 fax: 972/603-9052
Email: [log in to unmask]
-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Buechner,
Mark R (US SSA)
Sent: Tuesday, August 17, 2010 4:39 PM
To: [log in to unmask]
Subject: EXTERNAL: Re: [IPC-600-6012] Class 3/A requirements
Wendi,
The class 3/A requirements for Plating/Coating Thickness only address
the requirements for the first two rows (titled "Copper-average" and
"Thin areas") of Tables 3-3, 3-4 and 3-5. At least that is what I
believe the intent of the sentence "The following apply to minimum
copper average and minimum thin areas:"....which we put in the Class 3/A
box in the table.
There was not a separate revised Class 3/A requirement created for the
third row of each of the tables ("wrap"), so the values listed for Class
3 "wrap" in each of the three tables is applicable to Class 3/A
products.
Mark Buechner
Quality Assurance Engineer
BAE SYSTEMS
Electronics, Intelligence and Support
Phone (603) 885-6503
-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Wendi
Boger
Sent: Tuesday, August 17, 2010 5:07 PM
To: [log in to unmask]
Subject: [IPC-600-6012] Class 3/A requirements
I need some clarification on the requirement for Plating/Coating
Thickness. The 3/A page requires additional copper thickness above
class 3 to be added to tables 3-3, 3-4 and 3-5. Does this also apply to
the minimum wrap thickness? (Example) Is it required for a
non-conductive filled through via to have .944 mils of wrap (table 3-3)?
It's a bit confusing as it says to apply to minimum copper average and
minimum thin areas.
Wendi
This communication is for use by the intended recipient(s) only and may
contain information that is privileged, confidential, proprietary and
exempt from disclosure under applicable law. You are hereby notified
that any dissemination, distribution, forwarding or copying hereof is
strictly prohibited without the express written consent of DDi. If you
have received this communication in error or are not the intended
recipient, you should destroy the message and any attachments or copies,
and you are prohibited from retaining, distributing, disclosing, or
using any information contained herein. Please inform us of the
erroneous delivery by return e-mail. Thank you for your cooperation.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask]
______________________________________________________________________
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask]
______________________________________________________________________
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask]
______________________________________________________________________
NOTICE: This email message is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
|