JEDEC J-STD-020

Reflow Peak

Testing requires subjecting pre-conditioned components to elevated temperature profiles matching lead-free solder reflow conditions. Under jedec j-std-020 guidelines, devices are exposed to specific peak temperatures, typically between 245 and 260 degrees Celsius, depending on package volume and thickness. The standard dictates heating rates, dwell times at peak temperature and cooling rates to simulate real surface-mount production environments.

Thermal stresses during this cycle reveal latent defects in die attach materials and mold compounds.

Floor Life

Moisture sensitivity levels dictate the safe exposure time components can remain in ambient factory conditions before requiring bake-out processing. Following jedec j-std-020 classifications, Level 1 devices possess unlimited floor life at ambient conditions, while higher levels specify restricted exposure windows down to a few hours. Components exceeding their allowable floor life must undergo controlled thermal baking to remove moisture without damaging terminals or packaging materials.

Moisture barrier bags with desiccant packaging protect sensitive components during shipping and storage.

Pass Criteria

Post-reflow evaluation uses acoustic microscopy and electrical testing to verify package integrity. Devices displaying internal delamination, external cracking or electrical failure after thermal stressing fail the classification test.