interesting , how thick is 52 ? (just curious) . Earl we have the layers cost dilemma here : What would be ratios of yields and costs from simple double sided FR4 ; to 4 layers, 6, 8, >>> etc. ? And why even's only ; no odd layers ever ? thanks paul -----Original Message----- From: Enter your name here [mailto:[log in to unmask]] Sent: Saturday, 28 August 1999 8:22 To: [log in to unmask] Subject: Re: [TN] In Circuit Test Your 2 cents noted. No biggy, but we build bare boards up to 52 layers and loaded cost over too many thousands. Even our cheap stuff ain't cheap. DFM and T is critical. It just can't happen without concurrent engineering including all responsible "experts" from design through test. Earl Moon ----- Original Message ----- From: Darrel Therriault <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, August 27, 1999 11:35 AM Subject: Re: [TN] In Circuit Test > TechNet.... > > I'd like to put in my $.02 for DFT...... > > We specify 100% netlist coverage for ICT unless there is a compelling design > reason why a net can not be accessed. It's part of our Mfg DFT requirements. > > The rationale.....our boards are expensive and complex. Having to scrap > out or spend > a lot of debug time at Functional costs a lot more in time and resources > then adding > some test points or taking up a little more real estate or adding a > layer. I think if you > look at the cost implication of production and service/customers it works > out to a > much bigger advantage to have ICT at the highest level possible. > > DT > > ############################################################## > 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 > ############################################################## ############################################################## 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 ############################################################## ############################################################## 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 ##############################################################