Hi,
This subject is being discussed form time to time by forum.
During production of PCB we are facing more and problems with accuracy of
plugging , especially on dence SMD and BGA boards.
The plugging is done by screen printing and the main problem is
registration. At this stage of production we are facing most problems of
tolerances between drilling and circuitry pattern image and in dence boards
this lead us to plugging problems.
I do believe,that they are lot of people in the industry with the same
problem and I am just wondering what methods are used by other.
regards
Edward

Edward Szpruch
Eltek , Manager of Process Engineering
P.O.Box 159 ; 49101 Petah Tikva Israel
Tel  ++972 3 9395050 , Fax  ++972 3 9309581
e-mail   [log in to unmask]

---------------------------------------------------------------------------------
Technet 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 Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------