TECHNET Archives

November 2010

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ragesh <[log in to unmask]>
Date:
Thu, 11 Nov 2010 10:19:07 +0530
Content-Type:
text/plain
Parts/Attachments:
text/plain (41 lines)
Hi Scott,

I have used the following parameters in few of my designs,

If NSMD Copper Pad   - 200um, Soldermask opening - 300um
If SMD   Copper Pad   - 300um, Soldermask opening - 200um

Assembly/FAB house will suggest on SMD/NSMD based on their process
control....

Via on pad for escape routing......(Offset via can create non circular PAD
Which can impact assembly yield)

Via and Drill of  200um/100um

Stacked MicroVia From L1-L2 and L2-L3

L2 is designated as GND plane with Minimum/Zero escape routing....

It's always better to consult with your Fab/Assembly house in the earlier
stage of design. Especially when you have POP package

Regards,
RaGZ.


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/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
-----------------------------------------------------

ATOM RSS1 RSS2