I have built a prototype for a project that I'm trying to manufacture. The prototype uses an arduino, but I'm unsure how to get that produced on a larger scale. If anyone has any suggestions, please let me know. I'm really just in search of a way to get my the code that I loaded onto my arduino built into an AVR microcontroller, and how to implement that into my design. If it helps, I'm only using nine pins, and my arduino is an uno. Also, where is a good place to get boards manufactured that include sockets for microcontrollers. I havent' decided how many to manufacture yet, not until I work out this and a few more kinks.
Usually, microcontrollers are programmed at manufacture. You supply the binary files to the assembly company and they'll flash the chips.
Some chip vendors will ship you chips pre-programmed with your image for a fee. This is likely only cost effective once you are ordering 1000s of units.
See also: Pre-programming surface mount ICs