Ipc-ch-65 - Pdf !full!

The handbook identifies various residues that can lead to electrochemical migration or corrosion:

The document explicitly debunks the idea that "absolutely clean" is necessary. Instead, it introduces the concept of An assembly is clean enough when the remaining residue will not interfere with subsequent processes (conformal coating, wire bonding) or long-term reliability under the expected environmental stress. ipc-ch-65 pdf

Providing strategies for cleaning under components with extremely low stand-off heights. The handbook identifies various residues that can lead