Norris-Landzberg-Exponential Model: Difference between revisions

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The thermal cycling profiles and test results for chip-scale package solder joints are given below. A thermal cycling profile can be represented by 3 independent stresses in Norris-Landzberg relationship. They are the maximum temperature , the temperature difference , and cycling frequency  .
{| {{table}}
!Failure Time
!T Max (°C)
!Delta T(°C)
!f
|-
| 208||80||120||1
|-
| 225||80||120||2
|-
| 308||80||120||3
|-
| 142||100||140||2
|-
| 108||120||160||2
|-
| 169||100||120||2
|-
| 131||120||120||2
|-
| 1300||80||50||2
|-
| 650||100||70||2
|-
| 258||120||90||2
|-
| 6231||30||50||2
|-
| 1450||30||70||2
|}


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{{Reference_Example_Heading3}}


{{Reference_Example_Heading4|ALTA}}
{{Reference_Example_Heading4|ALTA}}

Revision as of 23:28, 9 June 2014

ALTA_Reference_Examples_Banner.png

ALTA_Reference_Examples

Validate calculation of Norris-Landzberg relationship (can be done using the GLL model in ALTA with proper transformation for each stress).


Reference Case

Data is from Example 7.2 on page 257 in book Life Cycle Reliability Engineering by Dr. Guangbin Yang, John Wiley & Sons, 2007.


Data

The thermal cycling profiles and test results for chip-scale package solder joints are given below. A thermal cycling profile can be represented by 3 independent stresses in Norris-Landzberg relationship. They are the maximum temperature , the temperature difference , and cycling frequency .

Failure Time T Max (°C) Delta T(°C) f
208 80 120 1
225 80 120 2
308 80 120 3
142 100 140 2
108 120 160 2
169 100 120 2
131 120 120 2
1300 80 50 2
650 100 70 2
258 120 90 2
6231 30 50 2
1450 30 70 2



Result


Results in ALTA

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