I'm currently working on a research project to develop the technology for including BGAs in our designs. The project will include board design, solder joint volume, FEA, thermal analysis, process optimization and rework and repair. The assemblies will be ceramic BGAs soldered to polyimide multilayer boards which will be hard bonded to a restraining core made of silicon carbide/aluminum metal matrix. My management is concerned that one of our customers, the Navy, will be reluctant to allow the use of BGA technology on their hardware, considering the difficulty we had in convincing them to go surface mount. I'm looking for a list of other electronics manufacturers who are using BGAs on military contracts. If anyone is presently doing so, please let me know. Thanks in advance, Jim Marsico AIL Systems, Inc. Deer Park, NY [log in to unmask] or 516-595-5879. Thanks