I am looking for measured pad width for 20 mil land pattern for SMT. (QFP or TSOP) 

What is Pad width actal versus top copper layer?  Copper outer layer is 1 oz or 2 oz or 3 ozs. 

Reason for this question: Stencil is 6mils thick with min aperture opening of 9 mils. For gasketing, the pad need to o=be over 10 mils. 

2 Ozs copper has etch factor 2.5 mils over etch each side. Can final pad width of over 10 mils be made.

Any inputs on this will be appreciated.

Regards


Ashok

---------------------------------------------------
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
-----------------------------------------------------