Yes ..the goldmine stuff looks good at .25mm, I want to try making electronic LED biz cards....i've been looking at trying to embed the battery & components in the card....so the concept is to have a very thin flexible pcb, with all smd components & battery (CR2016 or 2012) mounted as flat as possible. Then to use perhaps 1.6mm thick plastic cardstock as the substrate to bond the pcb (component side) onto. The 1.6mm cardstock will be laser cut to accommodate all the smd components and hopefully I can end up with a relatively smooth 1.6mm thick electronic biz card that mixes both printed text with LED driver electronics. Mounting the battery without a battery holder is a bit of a challenge, but if the laser cut is good it could press fit. Then there is the matter of on/off....perhaps running the PIC at lowish frequency with sleep mode and perhaps some type of capacitively coupled signal from a finger could wake the PIC.
Any advice is appreciated.