Chris, Yes, you can but SAW die directly. We were building hybrids with these die years ago for delay line applications, but that is the only experience I have, and this was on ceramic. But yes, you should be able to bond them onto a PCB. SAW die are typically long and thin, but do not buy any longer then the application requires, since the longer they are, the more susceptible to "die fracturing while handling". One of the challenges, is to keep them from "vibrating" when powered-up. A trick we used that was very effective, was to attach die with RTV (Dow Corning 3140), and also, place a small dot of RTV at the end of each device. This "damped" the oscillation of the part. After wirebond you could then coat the device with RTV as your COB sealer (we used hermetically sealed cans), if your end process allows. If not, you will need to test a few vendors globtop with your devices & RTV to insure compatibility, etc., just like any new process. Thumbs-up! Good Luck! Jeff Hempton United Technologies Electronic Controls ______________________________ Forward Header __________________________________ Subject: [TN] Application of SAW filter chips Author: Chris Flores <[log in to unmask]> at Internet Date: 4/8/1999 8:04 AM This might sound slightly off-the-wall but I have to ask the question: Is it possible to buy SAW filter chips without the package (probably YES) Is it possible to bond them directly onto a PCB and then to glob-top them? And how would the globtop affect the performance of the device? Or is a glob really needed? Anything special needed for the chip-attach to the board? I would really appreciate any information members might have, as I am very much out of my depth with this type of device! Chris Flores ____________________________________________________________________ Get free e-mail and a permanent address at http://www.netaddress.com/?N=1 ################################################################ 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 ################################################################