Deflection results

The Deflection results show the deflection at each node of the part (Warp or Stress analysis), or of the wire or paddle (Microchip Encapsulation analysis).

Use the Plot Properties dialog, Deflection tab to alter the deflection plot so you can examine the result.

There are a number of possible variants of the deflection result according to paddle (Microchip Encapsulation analysis), based on a best fit:

Analysis type

The result name indicates whether a small deflection or large deflection analysis was run. If it is not indicated in the result name, then a small deflection analysis was run.

Net vs component deflections

You can view the net deflections at each node, or the component of the deflection along either the X, Y, or Z axis. The axis directions are determined by the defined anchor plane and are indicated in the anchor plane symbols.

All effects vs warpage contributors

There are six sets of deflection results.

To create these results, run a small deflection Warp analysis and select the Isolate cause of warpage option on the Warp Settings page of the Process Settings Wizard.

All effects:

The total deflection at each node of the ejected part, including the effect of constraints if any were applied on the part.

All effects (unconstrained):

The total deflection at each node of the ejected part using automatically generated constraints. This result is created for studies in which the part is overconstrained. That is, when the manual constraints impose a forced deflection on the part.

Differential shrinkage:

The component of the total deflection (warpage) at each node attributable to differential shrinkage.

Orientation effects:

The component of the total deflection (warpage) at each node attributable to orientation.

Differential cooling:

The component of the total deflection (warpage) at each node attributable to differential cooling.

Corner effects:

The component of the total deflection (warpage) at each node attributable to corner effects.

Constraint effect:

The component of the total deflection (warpage) at each node attributable to the effect of constraints when the part is overconstrained.

Using this result

The net deflection plot shows you the total predicted deformation of the part, based on the default best fit technique, or on a user-defined anchor plane.

This can be defined using (Results tab > Warpage panel > Visualize).

If the deflection values are small, magnify the display of the deflections, either in all axis directions or a selected direction only, using the Scale factor settings on the Deflection tab of the Plot Properties dialog. Deflection results can also be animated using the animation tools. The animation illustrates the change in shape of the part from the undeflected geometry (scale factor = 0) to the final deflected geometry using the specified scale factor. The component deflection plots are useful for assessing the amount of deformation in a specific direction.

Use the Examine Result tool to see the coordinates of selected nodes before and after deformation, and to see the distance between two successively selected nodes, before and after deformation.

A warp analysis with the Isolate cause of warpage option activated outputs not only the total deflection results but also breaks down the total deflections according to defined contributors to warpage: differential shrinkage, orientation effects, and differential cooling. Midplane and Dual Domain analyses can also display warpage due to corner effects. If the part is overconstrained, the warpage due to constraint effect is also displayed. The contributor with the largest deflection values can be regarded as the dominant cause of warpage. Having identified the dominant cause of warpage, specific measures can then be taken to attempt to reduce the overall warpage based on the particular cause.