Jens- DSTF is Drum Side Treated Foil, which is also known as Reverse Treated Foil. DSTF is foil that is treated on the shiny (drum) side, instead of the more typical matte side. This technology was invented by Polyclad Laminates, Inc. The shiny side is then laminated to the core prepreg, leaving the matte side exposed. DSTF has many advantages: Non-subtractive pre-cleaning, eliminating the need for microetching, pumice cleaning or mechanical scrubbing Improved resist adhesion for higher innerlayer yield Ultra low profile for cleaner etching and improved board reliability Erik Bergum, Polyclad, presented a technical paper at Expo '95, which further explains the advantages of DSTF vs. standard foil. The technical paper, entitled "Drum Side Treated Foil," is available through the IPC for $10 for members, and $20 for nonmembers. Regards- Chris Chris Jorgensen Project Manager IPC 2215 Sanders Rd. Northbrook, IL 60062-6135 -p- 847-509-9700 x.328 -f- 847-509-9798 [log in to unmask] http://www.ipc.org >>> JB <[log in to unmask]> 05/28/98 08:22PM >>> At 06:41 28.05.98 -0700, you wrote: >Hello Techneters > >I wonder what are the advantages of DSTF which make this type of >copper finish gaining so much popularity? What is DSTF? Jens ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################