hi, i'm not sure what the mood of this response is, but first articles do a lot more that just check the quality of the bare board. they also give you confidence in: parts placement, stencils, dispensing, reflow profiles, tooling, testing, solderability, ad nauseum. phil -----Original Message----- From: Howieson, Rick [mailto:[log in to unmask]] Sent: Thursday, June 01, 2000 4:24 PM To: [log in to unmask] Subject: Re: [TN] PCB Inspection Now there's a lack of trust in your board house. Rick >-----Original Message----- >From: Paul Klasek [SMTP:[log in to unmask]] >Sent: Thursday, June 01, 2000 5:04 PM >To: [log in to unmask] >Subject: Re: [TN] PCB Inspection > >Just to add a tiny note on bare boards, and/or componentry in general: >proved extremely useful here to run one board of each incoming batch or >revision >through the WHOLE process = incl. test. >Some of the surprises from 'protel glitches' and hairlines from platers do >escape >even most diligent Inwards. > >pk > >-----Original Message----- >From: Gabriela Bogdan [mailto:[log in to unmask]] >Sent: Friday, 2 June 2000 2:48 >To: [log in to unmask] >Subject: Re: [TN] PCB Inspection > > >Michael, >Your problem is very real, we perform incoming inspection for printed >circuits. >I will not go into many details, but : >Visual inspection is done for each lot on a sample basis, as well as >dimensional >testing. >Cross sections for copper thickness in holes and solderability are done >following a >skip lot program based on supplier, number of layers, PCB, and supplier >history. >We try to order only from suppliers with good history, thus we can widen the >intervals >between tests. >New suppliers are tested for each lot for a while, and if successful, they >enter the >skip lot. >We are a CM , and do the purchasing too, being totally responsible for the >assemblies. >Gaby > >Michael Blackburn wrote: > >> The company I work for is in the process of moving from inspecting >incoming >> pcbs to a "dock to stock" program. Also, we are outsourcing more of our >pcb >> assemblies and the feeling is that the CM should be responsible for the >> quality and reliability of the bare board. >> >> Does anyone have feedback about dock to stock programs? What kind of SPC >are >> you doing? Is a thourough audit of the board vendor and CM enough? What >kind >> of scrap/defect rates are you seeing? >> >> The reason I'm asking about this is because in a recent post about baking >> boards, someone responded that they were doing copper plating thickness >> measurement in the wall of the PTH. We experienced the same problem (blow >> holes) and ended up doing the same test. >> >> I would appreciate any feedback/experiences you might have. >> >> Sincerely, >> >> Mike Blackburn >> >> ############################################################## >> 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 Keach Sasamori at [log in to unmask] or >> 847-509-9700 ext.5315 >> ############################################################## > >############################################################## >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 Keach Sasamori at [log in to unmask] or >847-509-9700 ext.5315 >############################################################## > >############################################################## >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 Keach Sasamori at [log in to unmask] or >847-509-9700 ext.5315 >############################################################## ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ############################################################## ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################