Hi all, As the component are getting smaller, such as 0602 and 0402 package, do we still must have a 5mm keep out? Have any stress studies been done on those packages? Ted --- John Maxwell <[log in to unmask]> wrote: > Bob, > I am the guilty party that established the 5mm rule. > That was done back > when I was consulting and was the result of numerous > cracked capacitors > around the world. One would think that things have > gotten better with the > move to smaller parts but dielectric thickness and > also shrunk increasing > crack sensitivity so things are effectively the > same. Cracked capacitors > put two kids and my wife through university along > with paying the rent. Ah > to be consulting again with the same problems being > repeated, easy work. > > John Maxwell > > At 03:20 PM 6/10/2004 -0400, you wrote: > >I have been given a v-groove score keep out area > dimension of 1mm from the > >edge of the groove to the component body; except > the dimension becomes 5mm > >for ceramic components. 5mm seems like a very large > value. Does anybody have > >experience with this? Is it really necessary to > keep ceramic components that > >far from a v-groove score? > > > >Thanks. > > > >Bob > > > >--------------------------------------------------- > >Technet Mail List provided as a service by IPC > using LISTSERV 1.8e > >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 or (re-start) delivery of > Technet send e-mail to > >[log in to unmask]: SET Technet NOMAIL or (MAIL) > >To receive ONE mailing per day of all the posts: > send e-mail to > >[log in to unmask]: SET Technet Digest > >Search the archives of previous posts at: > http://listserv.ipc.org/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 > >847-509-9700 ext.5315 > >----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using > LISTSERV 1.8e > 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 or (re-start) delivery of > Technet send e-mail to [log in to unmask]: SET Technet > NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: > send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: > http://listserv.ipc.org/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 847-509-9700 ext.5315 > ----------------------------------------------------- __________________________________ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger. http://messenger.yahoo.com/ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 847-509-9700 ext.5315 -----------------------------------------------------