Design the load path
Support the substrate close to assembly forces and avoid cantilevered loads. Fasteners, connectors and wire-bond tools can introduce local forces. Separate mechanical retention from electrical connection where practical and use the package supplier’s mounting instructions.
Control flatness and interfaces
Clamping a warped substrate against a rigid surface can add bending stress. Review both mating surfaces, interface thickness and load distribution. Specify the assembly method and verify it on representative parts rather than choosing a generic torque value.
Protect edges throughout production
Trays, vacuum pickup areas and fixtures should avoid chipping critical edges. Define inspection criteria before assembly and after singulation. Document handling steps in the manufacturing plan so a qualified design is not damaged between process stations.
Engineering example
A connector insertion load near an unsupported corner can crack an otherwise sound board. Add fixture support or relocate the mechanical load path before increasing ceramic thickness as a default fix.
Before you release the design
- Support under local assembly loads.
- Review flatness and mating-surface tolerances.
- Define edge-safe handling and fixtures.
Sources and further technical reading
Manufacturer references support the material and process context. Worked examples and checklists are engineering guidance; they are not test results or supplier guarantees.