 
| Sender: |
|
| X-To: |
|
| Date: |
Wed, 30 Sep 2009 09:17:33 -0400 |
| Reply-To: |
|
| Subject: |
|
| From: |
|
| Content-Transfer-Encoding: |
quoted-printable |
| In-Reply-To: |
|
| Content-Type: |
text/plain; charset="utf-8" |
| MIME-Version: |
1.0 |
| Parts/Attachments: |
|
|
With 2oz externally starting with 7/7 works best for most factories. With new equipment these days 5/5 may be OK for some factories but risky with spacing issues.
www.quickturnflex.com
Thank you,
Jim Mahoney
Quick Turn Flex Circuits, LLC
Applications Project Manager
P# 603-821-7071
M# 603-305-6250
Please consider the environment before printing this e-mail
** This email and all attachments have been scanned prior to being sent**
Confidentiality Notice: This page and any accompanying documents contain information that is confidential, privileged or exempt from disclosure and is intended for the exclusive use of the addressee. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of the contents of this information in any manner is strictly prohibited.
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Anderson, Veronika
Sent: Tuesday, September 29, 2009 4:59 PM
To: [log in to unmask]
Subject: [DC] Minimum Surface Conductor Thickness
Help needed in interpretation of IPC-6012.
Appendix A (page 37) calls out Table 3-8 and Paragraph 3.6.2.13 for
External Conductor Minimum Thickness after plating.
Table 3-8 shows that Minimum Surface Thickness after processing is 3.295
mils when the starting foil weight is 2 Oz.
Our company specifies the finished copper weight as 2 Oz on the drawing.
We do not specify the starting foil weight. PCB manufacturer is allowed
to choose a material that he has in stock and plate it up to be 2 Oz.
My question is - What minimum surface conductor thickness after
processing shall be targeted if the starting foil weight is not 2 Oz?
(The PWB house insists on having the conductor thickness 2.8 mils after
processing. However, I cannot find such a number in IPC-6012.)
Thank you,
Veronika Anderson, C.I.D.
Senior Electrical / Mechanical Designer
PerkinElmer Optoelectronics
1330 East Cypress St.,
Covina, CA 91724
Phone: (626) 967-9521 X 236
E-mail: [log in to unmask]
---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL)
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
---------------------------------------------------------------------------------
---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL)
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
---------------------------------------------------------------------------------
|
|
|
