Mr.Kim, There is an excellent explanation of 'Hollow Glass fibre' and related failure mechanism in chapter 6 of Failure modes and Mechanisms' by Singh and Puligandla - 1998. See pages 268-269. ±è´Þ¿µ Â÷Àå ÀüÀÚ ÁõÆò°øÀåÇ°Áúº¸ÁõÆÀ wrote: > Dear Technetters: > > Have you ever experienced or heard of hollow fiber ? > Is this in the state of hollowing between fibers or fiber itself? > For the former, I think poor soaking of resin is the cause and the latter > is intentionally developed > fiber to reduce Dk. > Do you have any idea to improve soaking tight bundle of fiber? > Any comment to this is appreciated. > > Tal Young Kim > Manager, Quality Assurance Team > Doosan Corporation Electro-Materials BG > Tel : 82-445-820-8451 > Fax : 82-445-820-8300 > E-mail:[log in to unmask] > > ############################################################## > 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 > ############################################################## -- ____________________________________ Regards, Pratap Singh Tel./Fax: 512-255-6820, e-mail: [log in to unmask] or [log in to unmask] ############################################################## 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 ##############################################################