LG Display has unveiled a new OLED manufacturing technique called FLiPP that replaces Fine Metal Masks with photolithography. The method promises brighter, longer-lasting panels and lower production costs, potentially reshaping the display industry.

What You Need to Know

FLiPP uses photolithography to pattern RGB subpixels directly on a glass substrate, eliminating the need for Fine Metal Masks (FMM). This approach increases subpixel aperture ratio by 55%, leading to 1.6 times brighter panels and 2.4 times longer lifespans. LG Display has already produced a full panel on an 8.5-Gen motherglass using the technique, signaling readiness for mass production. The technology is expected to lower costs by reducing material waste and enabling larger display sizes without mask sag issues.

How Photolithography Replaces Metal Masks

Traditional OLED deposition relies on Fine Metal Masks as stencils to deposit organic LEDs onto the glass. The mask can sag, causing uniformity problems, and it wastes up to 70% of the organic material. FLiPP instead deposits the organic layer uniformly across the substrate. A photoresist layer is applied, and ultraviolet light through a photomask hardens the desired areas. A chemical bath removes the rest, leaving only the patterned subpixels.

The process repeats for red, green and blue subpixels. Key advantages of FLiPP include:

  • Aperture ratio increase: Subpixels can be placed closer together, boosting light output by 55%.
  • Power efficiency: Brighter panels require less energy, with a 13% reduction in power consumption.
  • Material utilization: FLiPP uses 64% more of the motherglass for laptop-sized panels, reducing waste.
  • Scalability: The technique can produce displays from 1 inch to 100 inches without mask constraints.

Why This Matters

FLiPP could make RGB OLED more commercially viable. Current flagship approaches from Samsung Display (QD-OLED) and LG Display (WOLED) rely on white or blue LEDs passing through color filters. RGB OLED directly emits red, green and blue light, offering wider color gamut and better efficiency. Combining FLiPP with RGB OLED could deliver exceptional color volume and address traditional weaknesses such as burn-in risk. The elimination of Fine Metal Masks also removes a major manufacturing bottleneck, potentially accelerating adoption of OLED for large-screen televisions and monitors. The consumer impact is clear: brighter, longer-lasting displays with potentially lower retail prices.

Industry Implications

LG Display plans to apply FLiPP to its RGB OLED technology, a move that would directly challenge Samsung Display's dominance in high-end panels. The photolithography process borrows from semiconductor manufacturing, allowing finer resolution and better uniformity. The final image quality benefits from the increased aperture ratio, making colors more vivid and text sharper. Industry analysts see FLiPP as a breakthrough that could extend OLED's competitive edge against LCD and microLED alternatives over the next five years.