Panel makers are stepping into the spotlight as semiconductor packaging enters a new phase driven by artificial intelligence, larger chip designs, and the rapid rise of heterogeneous integration. As AI processors become more powerful and complex, their package sizes are increasing, pushing chipmakers to explore more efficient packaging methods that can support higher performance, better scalability, and improved production economics.
One of the biggest shifts now gaining momentum is the move from fan-out wafer-level packaging, or FOWLP, to fan-out panel-level packaging, known as FOPLP. The key advantage is simple: panel-level packaging uses square or rectangular substrates instead of traditional round wafers, allowing more chips to be processed at once. This “square instead of round” approach can improve material usage, reduce waste, and potentially lower manufacturing costs as advanced packaging demand grows.
Display panel manufacturers may have a natural advantage in this race. Many already operate production lines built around large glass substrates, often bigger than those used by traditional semiconductor packaging and testing companies. That existing infrastructure gives them a strong foundation for developing FOPLP processes, especially as the chip industry searches for ways to scale advanced packaging capacity.
Among panel makers, Innolux appears to be moving the most aggressively. The company is using its older TFT-LCD production lines to build an independent FOPLP business, aiming to repurpose display manufacturing assets for next-generation semiconductor packaging. This strategy could give Innolux a valuable role in the expanding AI chip supply chain if it can overcome the technical challenges involved.
Innolux has already shown progress with an RDL-first sample featuring 10 redistribution layers. Redistribution layer technology is essential in fan-out packaging because it allows electrical signals to be routed efficiently between the chip and the package. The company’s latest sample suggests that it is making headway in tackling one of the major obstacles of glass-based panel packaging: substrate warpage. Warpage can affect yield, reliability, and process control, making it a critical issue for any company hoping to commercialize FOPLP.
The company is reportedly aiming to move the technology toward mass production within the next one to two years. If successful, Innolux could become one of the first display panel makers to establish a meaningful position in fan-out panel-level packaging, particularly as demand for AI accelerators, high-performance computing chips, and advanced semiconductor modules continues to climb.
AUO is taking a different path. Rather than directly competing with established semiconductor packaging and testing companies, AUO is focusing on related applications that use redistribution layer technology. These include satellite antennas, optical communications, and other emerging markets where fine-line circuit formation and large-area processing can create new business opportunities.
This more cautious approach allows AUO to strengthen its technical capabilities while avoiding immediate head-to-head competition in the crowded advanced packaging sector. By developing RDL-based applications first, the company can build expertise that may later support a broader move into semiconductor packaging if market conditions become more favorable.
Sharp has chosen yet another strategy. Instead of building a standalone FOPLP operation, the company has moved to sell a plant to Japan-based packaging and testing firm AOI Electronics. Sharp is also expected to provide technical support, helping AOI Electronics use the facility to develop its fan-out panel-level packaging business. This model allows Sharp to participate indirectly in the FOPLP ecosystem while leveraging a partner with semiconductor packaging experience.
The growing interest from display manufacturers shows how the boundaries between the display and semiconductor industries are beginning to blur. As chip packages become larger and more complex, manufacturing know-how from the panel industry may become increasingly valuable. Large glass substrate handling, precision patterning, and high-volume production experience could all play important roles in the future of advanced packaging.
The shift to FOPLP is still in its early stages, and challenges remain. Companies must address warpage, yield control, fine-line redistribution layers, process reliability, and cost competitiveness before panel-level packaging can be widely adopted for advanced chips. However, the potential benefits are significant, especially for AI chips and high-performance computing processors that require larger packages and more advanced integration.
As demand for artificial intelligence hardware continues to surge, the semiconductor industry is under pressure to expand packaging capacity and improve production efficiency. Fan-out panel-level packaging could become a key solution, and display panel makers are positioning themselves to capture part of this fast-growing opportunity.
Innolux, AUO, and Sharp may be taking different routes, but their moves point to the same larger trend: panel makers are no longer limited to displays. With the right technology and partnerships, they could become important players in the next generation of semiconductor packaging.
