Michael Zhang (PetaPixel) dug up this promotional video that shows in great detail how digital cameras work and how they are made. If you are a photographer (and I know you are) or have an engineering background then you will find this video fascinating.
Canon Premium Library:
"An introduction to how digital cameras work that also highlights Canon's unique manufacturing expertise and latest environmental measures. Years of know-how, combined with leading-edge technologies and manufacturing processes, support Canon's position as the leader in high-resolution, high-quality digital cameras."