4-inch Bare Die Tray

Reference Factors for Designing Bare Die Tray (Waffle Pack)

Designers should ensure that no direct pressure or friction is applied to the die’s active circuitry, bond pads, or edges.

Geometry must fully shield delicate areas while preventing induced stress.

Pocket depth and spacing should remain consistent to avoid tilt, overlap, or micro-chipping in motion.

Antistatic or dissipative properties are crucial to prevent charge build-up through assembly and shipping.

Trays must align with die sorters, vision inspection, and automated pick-and-place modules typically used in wafer-level packaging lines.

Cleanroom compliance—low particles, minimal outgassing, chemical stability—is also critical for wafer-to-die handling.

Bare Die:

A bare die is a single semiconductor chip separated from the processed wafer but not yet encapsulated or packaged. Bond pads and active circuitry remain exposed, which makes the device highly vulnerable to mechanical, electrostatic, and environmental stress. Bare die are essential in advanced modules, multi-chip assemblies, and prototype builds where minimal footprint and direct interconnects are required. Precision carriers like waffle packs protect these dice from contamination, mishandling, or orientation loss throughout testing and assembly.