Au stringers observed before Bond

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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