2.5D/3D IC packaging heater

Thu, 04 Jun 2026 01:09:16 +0800

On the 2.5D/3D packaging floor, temperature isn’t just another setting—it is the process. Underfill flow, photoresist soft bake, and die-to-interposer bonding all hinge on thermal uniformity and repeatability. One hotspot, one drift, and the stack starts to slip: voids show up, bumps misalign, and yield heads out with the scrap. What matters under the hood We built the 2.5D/3D IC packaging heater around short-wave infrared (SWIR) quartz elements. They dump energy directly and settle fast. Across the active zone, wafer-level uniformity holds ±0.1°C, and setpoint repeatability stays within ±0.2°C cycle-to-cycle. The hot zone is sealed and isolated, and it’s verified at zero particle generation in Class 1–100 cleanrooms. You can count on stable output after 5,000+ hours, with intensity drift under 5%. Why it sticks in production In rework and bonding cells, the heater brings the substrate up to temperature quickly, then holds it steady through the dwell. That keeps adhesives wetting out uniformly and keeps underfill voids from showing up. In photoresist bake steps, that same stability translates to tighter critical dimension control and fewer scum defects. The payoff is a predictable thermal budget, fewer rework lots, and uptime that depends on maintenance—not temperature swings. What you need to plan for The heater drops into standard packaging tools, but you have to plan clearance in the hot zone around fixtures and alignment stages. After install, run a short burn-in and calibration to lock the profile to your recipe. Once aligned, it runs with minimal tuning—just verify cleanroom particle counts during preventive maintenance so the zero-particle performance stays intact.

IC on Cozy Corner Infrared Heating

2.5D/3D IC packaging heater