I'm struggling to find a decent way to program a production run of some boards. The boards are going to be about 2cm by 3cm ovals with a surface mount SOIC 8 pin Atmel attiny13a microcontroller. The board is too small to have jumpers and jumpers are too expensive anyway.
This is a small production run of about 1000, but will lead to a greater production run.
What is the cheapest/easiest way to program these without adding any physical components to my board besides copper traces/pads?
If there is no easy way, how much extra would it cost to buy my attiny13a microcontrollers preprogrammed? And where could I buy them like this?