Case 1270 ยท Public preview
Displacement of an LED Anode Post Can Break Its Wedge-Bond Wire
Two LEDs were electrically open and nonfunctional, while a comparison LED remained functional but exhibited related physical damage.
Electrical testingOptical microscopyMicrosectioningSEMFailed-control comparison
What the evidence preview establishes
Thermal and mechanical damage displaced the lower-mass anode posts and fractured the wedge-bond wires near the heel, producing open circuits. Similar damage in the functional comparison indicated a progressive susceptibility rather than an isolated electrical defect.
Why this case matters
For an open LED, inspect the post-to-wire connection as well as the die. Local lens cracking, an air gap above a post, and an intact die can direct the investigation toward package-level thermomechanical loading.
Full evidence reserved for MEMBER and STOREThe complete case includes the evidence sequence, four interpreted figures, alternative explanations, limitations, and practical application guidance.