MEMS sensor wafer drying heater

Wed, 22 Jul 2026 04:43:44 +0800

IR Heating vs. Forced Hot Air: A Better Way to Dry MEMS Wafers

If you’ve spent any time in a MEMS fab, you know the drill. After wet etching or cleaning, you’ve got to get that moisture off the wafers. Most of the older lines we see still rely on forced hot air. It works, sure, but it’s slow. Lately, more engineers are switching over to infrared (IR) heating. Why? Because they’re tired of waiting.

The problem with “waiting for the air”

Here’s the thing about hot air: it’s a slow process. You have to heat the air, which then heats the chamber, which eventually heats the wafer. It’s a lot of middle-men. In a high-volume setup, that lag becomes a massive bottleneck. IR heating just cuts through all that. Instead of warming the room, the radiant energy hits the wafer surface directly. We use short-wave IR emitters to make this happen. They make the water molecules vibrate almost instantly, flashing them into vapor. You aren’t standing around waiting for a blower to reach the right temperature. We’re talking about dropping drying cycles from minutes down to a few seconds. It’s a night-and-day difference.

MEMS on Advanced IR Heating Technology

MEMS sensor wafer drying heater

IR Heating vs. Forced Hot Air: A Better Way to Dry MEMS Wafers

The problem with “waiting for the air”