Craig What is the type of PCB. Is it a BGA of some sort? Integrating Cu heat sinks inside or attaching on back side of PCB is a known technology. Depending on the PCB, whether a BGA or bare board I can assist you better. Please provide additional information. David A. Jandzinski Substrate Product Engineer Abpac, Inc -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig McGlinchy Sent: Tuesday, December 01, 1998 8:01 PM To: [log in to unmask] Subject: [TN] Copper Heat Sink HI there, I was wondering if it is possible to get a copper slug (or solid villed via's etc) manufactured into a PCB.. This is to help dissipate the heat away efficiently from a very hot component.. You might be thinking why don't I just use solder filled via's.. well this is because copper is a MUCH better conductor of heat than solder. Has any one done this sort of thing before, or have any other good ideas. Thanks in advance, Craig McGlinchy PCB Designer Tait Electronics Ltd New Zealand Ph 64 3 358-3399 extn 8509 Fax 64 3 358-0432 Email [log in to unmask] ################################################################ 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 ################################################################ ################################################################ 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 ################################################################