Clean Bake & Degassing
Baking LED, LCD panels, light guides and backlights comes down to two problems: particles on optical surfaces and bubbles after bonding. In 1988 WEISUN co-developed Taiwan's first cleanroom-dedicated oven with a domestic dryer maker. Today, 99.97% HEPA filtration holds up to ISO 14644-1 Class 4. For low oxygen, inert gas purge reaches 10ppm. Bonded panels are degassed under pressure; backlight prints are UV-cured on a conveyor. All built in Taiwan.
Process Challenges
Challenge 1: Particles on optics
Falling dust leaves defects on panels and light guides.

Challenge 2: Bubbles after bonding
Fine bubbles after LCD bonding resist normal-pressure baking.

Challenge 3: Print drying slows the line
Long backlight print drying; power cost grows with volume.

Solution 1: Class 4 clean baking
HEPA at 99.97% keeps the chamber up to Class 4.

Solution 2: Pressure degassing
Bubbles are pressed out at up to 10 kgf/cm².

Solution 3: UV conveyor curing
UV curing replaces long drying, up to 30% more output.
Key Capabilities
Clean baking chamber
HEPA filtration at 99.97% holds up to ISO 14644-1 Class 4 @0.3µm, cutting dust defects on light guides, LEDs and backlight modules. The heated rear door panel does not warp.

Low-oxygen control
Inert gas purge at positive pressure reaches 10ppm O2; jacketed indirect cooling keeps it low during cool-down, for panel and coating work.

Pressure degassing
Bubbles left after LCD bonding are pressed out at up to 10 kgf/cm². The door opens only after full pressure release.

UV conveyor curing
Two-level UV lamps and stepless speed suit backlight and electronics prints. WEISUN has held a high-power UV-LED patent since 2015.
Service & Track Record
Integration: each oven has a PLC touch panel for live monitoring and history; data uploads to the IT server and links to MES, EAP and ERP. UV conveyors match local power and upstream automation.

Track record: co-developed Taiwan's first cleanroom-dedicated oven in 1988. Customers have included major Taiwanese panel and LED makers.

Custom builds: chamber size and temperature match the product. Design, sheet metal, assembly, QA, packing and on-site installation, all in Taiwan. Engineers then support by phone, video and remote measurement.