The standard categorizes visual findings into four levels of acceptance:

In Class 3, solder balls are never acceptable. In Class 2, solder balls are acceptable if they are encapsulated by conformal coating or are immobile. Debate: "Immobile" is subjective. Does a ball that moves under a microscope brush count?

IPC-A-610F serves as a key 2014 visual inspection standard for electronics assembly, defining acceptance criteria for PCB components across three classes. While the document covers areas from handling to soldering, the standard has since been updated, with Revision J (2024) being the current version. More information on PCB standards is available at

: Includes products where the primary requirement is functionality, such as toys or basic consumer gadgets.

Ipc-a-610f Pdf -

The standard categorizes visual findings into four levels of acceptance:

In Class 3, solder balls are never acceptable. In Class 2, solder balls are acceptable if they are encapsulated by conformal coating or are immobile. Debate: "Immobile" is subjective. Does a ball that moves under a microscope brush count? ipc-a-610f pdf

IPC-A-610F serves as a key 2014 visual inspection standard for electronics assembly, defining acceptance criteria for PCB components across three classes. While the document covers areas from handling to soldering, the standard has since been updated, with Revision J (2024) being the current version. More information on PCB standards is available at The standard categorizes visual findings into four levels

: Includes products where the primary requirement is functionality, such as toys or basic consumer gadgets. the standard has since been updated