Organic EL Device Production Sulfur Oxide Control

The patent applies parameter changes by establishing specific quantitative thresholds for sulfur oxide concentration (A ≤ 0.03 ppm) and exposure time (B ≤ 86400 sec) during production. By controlling the product A×B to satisfy specific formulas, the method optimizes the balance between maintaining production efficiency and protecting the organic EL device from sulfur oxide damage, thereby extending luminance life.

The patent creates a protected production environment by controlling sulfur oxide levels to create an inert-like atmosphere during the formation of organic functional layers. This approach prevents harmful chemical interactions between sulfur oxide and the organic materials, similar to how inert gases protect sensitive materials, thereby improving device longevity without significantly impacting production throughput.

The patent implements preliminary action by establishing sulfur oxide control measures at the very beginning of the production process, from the initiation of organic functional layer formation. By proactively controlling the environment before damage can occur, rather than attempting remediation later, the method extends device life without requiring extended production time for post-processing or rework.

The patent applies the skipping principle by rapidly moving through the production process within the defined exposure time limit (B ≤ 86400 sec). By efficiently completing production steps within the safe exposure window rather than prolonging processes, the method achieves extended device life while minimizing production time loss.