panel-level packaging

An advanced packaging method where semiconductor dies are processed on large, rectangular panels rather than traditional round wafers.

Panel-Level Packaging (PLP) is an advanced semiconductor manufacturing process where microchips are packaged on large, rectangular panels rather than traditional circular silicon wafers. In standard wafer-level packaging, chips are processed on 300mm round wafers, leaving unused space along the curved edges. By transitioning to large rectangular panels, manufacturers can fit significantly more silicon dies onto a single substrate, drastically reducing edge waste and boosting production throughput. To achieve this, manufacturers place individual dies onto a carrier panel, encapsulate them, and build the necessary electrical connections using thin-film redistribution layers. This approach is highly valued for high-performance computing, artificial intelligence, and mobile processors that require compact, high-density chip integration. However, processing large panels introduces technical challenges, such as panel warpage, die shift during encapsulation, and the need for high-precision lithography over a much larger surface area. For investors, PLP represents a major structural shift in the semiconductor supply chain. It offers a path to lower packaging costs per unit, which is critical as traditional chip scaling slows down. Investors monitor the adoption of PLP to identify growth opportunities among semiconductor equipment manufacturers that supply specialized panel-sized plating, etching, and lithography tools, as well as outsourced semiconductor assembly and test (OSAT) companies investing in these high-volume lines.

A semiconductor packaging facility processes chips on a standard 300mm circular wafer with an area of approximately 70,686 square millimeters. By switching to a rectangular panel measuring 600mm by 600mm, the total processing area increases to 360,000 square millimeters. This represents a surface area increase of 360,000 / 70,686 = 5.09 times, allowing the manufacturer to package roughly 5 times more chips per process cycle and significantly lower the cost per package.