In order to take advantage of dynamic dispensing for underfill encapsulation, there are several requirements that need to be considered.
Dynamic dispensing for underfill encapsulation is a feature that allows you to simulate the actual dispensing path more realistically. To use this feature, you need to determine your dispensing path, decide which is the start node and which is the end node, and assign injection locations along the entire path. A minimum of 4 injection locations are required, but ideally all nodes on the plane along the dispensing path should be set as injection locations.
Note: The option to Perform dynamic analysis is available only for 3D models.
- Make sure that the dispensing path is a single continuous path. The path can be multiple planes, as long as they are connected. However, a closed loop is not allowed.
- Make sure that each plane of the dispensing path has straight edges.
- Define at least 4 injection locations for each injection plane. Although it is not required, we recommend that every node on the plane along the dispensing path is set as an injection location.
Note: Not all injection locations on a plane should be aligned along a straight line.
- Decide which injection node at one end of the dispensing path will be the start node, and which injection node, at the other end of the dispensing path, will be the end node.
- Decide how many dispensing passes you want. For each dispensing pass, the dispensing speed is constant. However, different passes can have different speeds.
- The dispensing volume added over all passes should total at least 100% of the cavity volume to avoid short shot.
Note: The total dispensing volume may be greater than 100% of the cavity volume.