IR control board

hi,

I need some help designing the circuit board for an IR controller.

Picture of the circuit board:

http://www.rcgroups.com/forums/attachme … 5712&stc=1

"Complete electronics: Vishay IR receiver and MOSFET drivers, Atmel ATtiny26L controller,

PCB 0.05 glass fiber. Total weight all electronics 0.13 gram ! Battery 20 mAh, weight 0.65g."

This is the main board for the controller but I don’t really know how it works, and what’s behind the Atmel PIC ???

some information about the Atmel PIC: Tiny 26L

Thank you for your help

-scrutor