This technology provides a method for testing digital circuits on a printed circuit board (PCB) after manufacturing. It allows engineers to control and observe the signals at the pins of integrated circuits without needing physical access to the board’s internal nodes. For example, it can verify that components are correctly soldered and that connections between them are functioning as intended.
Its significance lies in enabling comprehensive testing and diagnosis of electronic systems. This reduces the time and cost associated with identifying and repairing manufacturing defects. Historically, reliance on in-circuit testing (ICT) was high, but this methodology allows for increased test coverage, particularly with high-density boards and ball grid array (BGA) components where physical access is limited. It has become indispensable for ensuring product quality and reliability, offering a standardized approach to validating circuit board functionality.
