Burst safety barrier
Why? / How?
Sufficient?
Reliability risk as
defect escape
UNISEM probe
Concequence
Accident
Direct cause
Reson for direct cause
Root cause
Au stringers
observed
before Bond
Person slips
Unsuitable shoes
Private cost for
work equipment
Didn't see the risks
Lack of education
in job safety analysis
(JSA)
Non-epolished Au seed left on wafers
Contaminated ePolish bath
Unsuitable floor
material
It has rained
df
Unsuitable access
to the work place
Lack of planning
for work tasks