Class 1 has the least stringent manufacturing requirements. The first step in identifying which classification your PCB needs is to understand the differences between the classes and their requirements: How IPC-A-610 Class 2 Requirements Compare to Other Classes Let’s take a closer look at the differences between these three classifications and how they will affect you in the manufacturing of your PCBs. In fact, you may get better overall results by having them built to IPC-A-610 class 2 requirements instead. Most PCBs do not need to be built to the highest standard-Class 3. The standard lists three classifications by which PCBs are to be built: Class 1, 2, and 3. The Association Connecting Electronics Industries (known as IPC) publishes the industry standard for PCB manufacturing-IPC-A-610. Some designers are concerned about whether or not their boards should be built to the highest standards of manufacturing. It is human nature to overthink a solution to a problem, and in the world of printed circuit board manufacturing, you will find this same tendency. If they had, they would have discovered that they could have simply opened it and walked out.

Nobody tested to see if the door was actually locked, however. From loosening door hinges to chipping the cement out around the window bars, all of these test subjects were convinced that they had found the best solution, if only they had a little more time to complete their efforts. Volunteers were put into a jail cell and given an hour to figure out how to escape. I read a story once about an experiment to see if people could figure out the simplest solution to a problem.

Ipc a 610e pdf