40th Conference Proceedings on Electronic Components and Technology
DOI: 10.1109/ectc.1990.122316
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Compliance metrics for surface mount component lead design

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Cited by 13 publications
(5 citation statements)
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“…Effective strains were calculated and combined with the three-band techniques to predict solder joint survivability. Lead spring constants can be used in place of detailed lead models when only the PCB response is required [5,6]. Further simplification can be made by including the effect of the component with artificially increased stiffness and density of the underlying PCB properties in the FE model or with simple block 3D elements [7][8][9][10].…”
Section: Introductionmentioning
confidence: 99%
“…Effective strains were calculated and combined with the three-band techniques to predict solder joint survivability. Lead spring constants can be used in place of detailed lead models when only the PCB response is required [5,6]. Further simplification can be made by including the effect of the component with artificially increased stiffness and density of the underlying PCB properties in the FE model or with simple block 3D elements [7][8][9][10].…”
Section: Introductionmentioning
confidence: 99%
“…For leadless components, K accounts for elastic deformations (board/component stretching and bending) of a slice of the assembly of width the assembly pitch. For leaded components, K is taken as the diagonal lead stiffness of a corner lead, using lead stiffness models developed by R. Kotlowitz 1819. A is the minimum solder joint load bearing area in shear, that is the minimum solder joint cross‐section parallel to the board.…”
Section: Srs Modelmentioning
confidence: 99%
“…During their service life they are exposed to harsh vibrations with critical acceleration levels occurring mostly during the launch phase. The scope of this work differs also from studies such as [2], which explore the influence on the reliability of the architecture of the CQFP component, i.e. amongst other parameters its diagonal lead compliance, leads coplanarity and its dimensions.…”
Section: Introductionmentioning
confidence: 97%