Hi, netters! As a producer of CCL, we routinely check dielectric constant (Dk) of our laminates at 1 Mhz Recently, some customers want Dk at Ghz range, which we can not measure. Does anybody know reliable Dk testing service for laminates at Ghz range? We have HP instrument which has the capability of measuring Dk up to 10 Ghz. However, we just do not know how to measure Dk of our products, laminates. We heard that a specially designed fixture is needed for the laminate. Did anyone measure Dk of PCB laminate at Ghz ? What kinds of fixture did you use? Or is there any hands-on training course about Dk measurements? Minsu Lee Doosan Electro-materials Co. ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################