Moisture-Sensitive Devices: J-STD-020 and J-STD-033

A plastic-packaged component sitting on a bench absorbs moisture from the air. When it goes through reflow, that moisture turns to steam inside the package faster than it can escape. The package delaminates or cracks, bond wires lift, and the part may still pass every electrical test before it fails in an aircraft, a radar or a patient monitor months later. This course explains that failure and the two standards that prevent it.

You will learn what J-STD-020 does (the manufacturer classifies the device into a moisture sensitivity level) and what J-STD-033 does (you handle, store, bake and reseal it according to that level). You will learn to read the level scale and the caution label, what floor life means and when the clock starts, how to read a humidity indicator card, what the desiccant and moisture barrier bag do, and where J-STD-075 fits for components that are not integrated circuits. The third module takes you onto the floor: opening a dry pack, starting and logging the clock, pausing exposure in dry storage, deciding when a bake is required and why baking is slow and limited, and resealing a part-used reel. The final module works through a reel left on the line over a weekend, a bake log with gaps and a customer asking for records, and explains what an auditor checks.

The course is for SMT line operators, feeder setters, stores and kitting staff, goods-in inspectors, rework technicians, process engineers and quality staff at aerospace, defense and medical electronics assemblers. It teaches awareness of the standards' requirements; your site's procedure governs the details. No prior knowledge is needed.

The course closes with a 10-question examination drawn from a bank of 20. On passing you receive a PlanetISO Certificate of Completion with lifetime access to the course. The certificate does not expire.