> I guess I'm asking what's the PCB equivalent of a PROM? > Something that you can > have done in singles, can be done quickly, and is cost effective. To answer this specific question, this type of operation is done by a rapid prototyping board cutting tool, like an LPKF www.lpkf.com Some hobbyists have built similar tools. With one, you can literally have a pcb in an hour. But, there are a whole list of gotchas. First, you have to find someone who has one. Then there are the limitations; (usually) only two layers, (usually) no plated vias, (usually) no soldermask or silkscreen, limitations in tracewidth and routing. When you're done with the gotchas, it is very unlikely (unless you are doing a very simple board) that the proto will be identical to your production board. Gary Crowell Micron Technology -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics