Hi Nagaraj - I don't know what you mean by Bed of Nails testing. People mostly talk about bed-of nails in connection to a functional test where the nets are accessed through a matrix of pogo-pins. ICT (in-circuit Test) is in general not a functional test, but is in the simplest form a test where the impedances of all accessible nets are measured to help detect manufacturing defects like shorts, opens, incorrect values, incorrect polarity etc. ICT is also referred to as Node Impedance Test (NIT). Modern ICT testers have many capabilities beyond just measuring impedance, such as boundary -scan and programming of non-volatile memory. Check also Agilent's testjet. Flying probe test is the prototype or low-volume version where the probes represent a very flexible fixture that can be programmed to hit all the nets in turn. ICT tester for higher volume will have a custom fixture for each board, with pogo-pins that connect to all nets simultaneously. Agilent and Teradyne are major vendors of in-circuit test equipment. You can check their websites for more information http://www.teradyne.com/ http://www.home.agilent.com/ Med vennlig hilsen. Best Regards. __________________________________________ Haldor Husby Senior Development Engineer Data Respons Norge [log in to unmask] www.datarespons.no On Mon, 24 Jul 2006 21:43:54 +0100, ert ert <[log in to unmask]> wrote: >Hi All, > >I have studied and followed ICT testing on layout with constraint requirements like placing in grids, spacing b/w prope pads, component to Probe pads spacing,..etc But I do wish to know how the ICT testting is carried out? Is it similar to Bed of Nails test and Flying prope test? > >If any one has any documents or have practical experience on this can you help be understanding this. > >Thanks much in advance. >Nagaraj > > >--------------------------------- > >--------------------------------------------------------------------------------- >DesignerCouncil 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 DesignerCouncil. >To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) >Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 >--------------------------------------------------------------------------------- > Find out what India is talking about on Yahoo! Answers India. --------------------------------------------------------------------------------- DesignerCouncil 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 DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------