Re-evaluate the strength termination requirement

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Reference no: EM131203512

The data below relate to failures of terminations in a sample of 20 semiconductor devices. Each failure results from breaking of either the wire (W) or the bond (B), whichever is the weaker. The specification requirement is that fewer than 1% of terminations shall have strengths of less than 500 mg.

a. Estimate Weibull parameters for

(i) termination strength;

(ii) wire strength;

(iii) bond strength.

Comment on the results.

b. If using Weibull++ select rank regression on X (RRX) and run 'Distribution Wizard' for this data.

Choose the best fitting statistical distribution for those results and re-evaluate the strength termination requirement.

Failure load (mg)	or	Failure load (mg)	or
550		1250
750		1350
950		1450
950		1450
1150		1450
1150		1550
1150		1550
1150		1550
1150		1850
1250		2050

Reference no: EM131203512

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