Drying semiconductors before packaging fab

Sun, 07 Jun 2026 01:14:26 +0800

Once the wafer clears lithography, it’s off to die attach on the packaging line. Before that handoff, you have to pull every trace of moisture off the surface. Leave any behind and you’re gambling with voids in the underfill, delamination at the bond interface, or a latent reliability hit that won’t show up on in-line inspection. The drying step isn’t a passive wait—it’s an active thermal move that sets the table for the entire encapsulation sequence. What matters in the real world is control you can count on, day after day. Our drying modules hold wafer-level thermal uniformity within ±0.1°C across the substrate, run in cleanroom Class 1–100, and add zero particles during the cycle. We use NIR heating for rapid, non-contact energy delivery, so the surface hits the target without driving the bulk too far. That temperature precision carries straight into the photoresist bake steps—soft bake and hard bake—giving you stable critical dimension control and fewer scum defects. Repeatability is baked into the thermal profile, and the tool keeps the line moving with 24/7 reliability. Here’s the simple part: you need the thermal budget managed tightly so die attach and encapsulation see the same surface conditions, cycle after cycle. Tight uniformity cuts scrap, speeds changeover, and drops energy per lot. The process window opens up without sacrificing throughput, and the tool drops cleanly into existing packaging flows. A couple of practical notes. NIR drying is sensitive to substrate reflectivity and emissivity, so you have to tune the thermal profile for each product stack. Installation comes down to matching exhaust and make-up air to the tool’s airflow, and aligning the chamber to the handler to keep particle performance where it needs to be. We supply application data and interface specs to cut qualification time.

Semiconductors on Five-Star Infrared Heating Systems

Drying semiconductors before packaging fab