My guess is that anything that is outside the norm is typically a time/cost factor.
For example, the templates that we use to save time are typically for class 2 boards... If we needed to build to class 3 there would be time spent up-dating the notes to class 3... each detail that deviates from standard, become a 'custom thing'... requiring time to develop a correct feature, notes, tables, etc and more checking time... so I would guess it would take most shops more time. If it's 'run of the mill' normal, then all of the work has already been done in the documentation templates... etc. which allows less time or the fastest time to get the job done.
Other things that can affect the time to get the job done are troubles like being restricted in via pad geometries to larger sizes that make the board harder to route. Wider spaces between traces, or thicker trace widths... etc.
Does that help?
William Brooks, CID+
Printed Circuit Designer
2747 Loker Ave West
Carlsbad, CA 92010-6603
760-930-7212
Fax: 760.918.8332
Mobile: 760.216.0170
E-mail: [log in to unmask]
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Jose A Rios
Sent: Thursday, September 24, 2015 8:42 AM
To: [log in to unmask]
Subject: [DC] Class 3 vs 3/A layout; is there a difference??
For board design/layout, should one expect a significant increase in required layout lead times when specifying fabrication to 6012C Class 3/A, as opposed to Class 3 ?? I can understand that a layout to Class 3 would take longer to obtain, over the same board laid out to Class 2; but from 3 to 3/A should one expect an order of magnitude increase in the time it takes to do a layout ??? What about 6012B (which has a 2 mil min internal annular ring requirement for 3/A) ?? I’m thinking not, but I just want to validate that.
José (Joey) Ríos, Sr QA Engineer
Mission Assurance
Kavli Institute for Astrophysics & Space Research Massachusetts Institute of Technology [log in to unmask]<mailto:[log in to unmask]>
(617)324-6272
---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0.
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) For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
---------------------------------------------------------------------------------
_____________________________________________________________________________
Scanned by IBM Email Security Management Services powered by MessageLabs. For more information please visit http://www.ers.ibm.com
This email is intended only for the use of the party to which it is addressed and may contain information that is privileged, confidential, or protected by law. If you are not the intended recipient you are hereby notified that any dissemination, copying or distribution of the email or its contents is strictly prohibited. If you have received this message in error, please notify us immediately, by replying to the message and deleting it from your computer.
WARNING: Internet communications are not assured to be secure or clear of inaccuracies as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. Therefore, we do not accept responsibility for any errors or omissions that are present in this email, or any attachment, that have arisen as a result of e-mail transmission.
_____________________________________________________________________________
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0.
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)
For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
---------------------------------------------------------------------------------
|
