Phil Dutton wrote: > > Hello, > I was just wondering how people are dealing with ICT. > There is a big trend here (over the past year) to provide 100% nodal access > for ICT. > A big problem is littering the secondary side of the boards with suitable > test pads, taking up valuable routing area. > Often with SMT, the only vias on many of the nets, are to provide the test > point. (single sided probing fixtures) > I can see there are some benefits of 100% ICT, but from a designer's point > of view, we seem to be trading off the benefits of finer pitch devices. > Welcome to modern producibility. You can't ramp up production without automated test, if there's any kind of complexity to the product. You can't effectively do automated test without access to every functional pin of every device. The fun part? You should be providing access to unused functional pins as well. It's an opportunity to excel! The next step is to work up good verification of fixturing rules and then proper data handoff... -- Jeff Seeger Applied CAD Knowledge Inc Chief Technical Officer Tyngsboro, MA 01879 jseeger "at" appliedcad "dot" com 978 649 9800 ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################