tag: RDL

Innovations Driving The Advanced Packaging Roadmap: Part One
By Keith Best - 14 Jan, 2025 - Comments: 0

Advanced IC substrates (AICS) have been marching toward the 2µm line/space (L/S) redistribution layer (RDL) technology node for some time (figure 1). However, many questions remain about the ability of organic substrates to meet the line/space requirements of the next generation of advanced packages (AP), those below 2µm L/S and perhaps to 1.5µm L/S. Simply put: are organic substrates up to ... » read more

Screening For Known Good Interposers
By Anne Meixner - 14 Jan, 2025 - Comments: 0

Ensuring the quality of silicon and organic interposers is becoming harder as the number of signals passing through them continues to grow, fueled by more chiplets, higher processing demands, and more layers of devices assembled in a package. Interposers initially were viewed as relatively simple conduits. That perception has changed rather dramatically in recent years with the growing focus... » read more

Navigating Increased Complexity In Advanced Packaging
By Gregory Haley - 17 Dec, 2024 - Comments: 1

As chips evolve toward stacked, heterogeneous assemblies and adopt more complex materials, engineers are grappling with new and often less predictable sources of variation. This is redefining what it means to achieve precision, forcing companies to rethink everything from process control and in-line metrology to materials selection and multi-level testing. These assemblies are the result of ... » read more

Revolutionizing IC Packaging With High-Density RDL Technology
By Curtis Zwenger - 24 Oct, 2024 - Comments: 0

The demand for high-performance devices, particularly in AI, HPC, and data centers, has surged dramatically in the ever-evolving landscape of integrated circuit technology. This demand has been further accelerated by the COVID-19 pandemic, pushing the boundaries of silicon technology to its limits. Enter Amkor’s S-SWIFT, a packaging solution designed to address these challenges and revolution... » read more

Current Characterization Of Various Cu RDL Designs In Wafer Level Packages (WLP)
By JeongMin Ju - 15 Aug, 2024 - Comments: 0

Copper (Cu) redistribution layer (RDL) technology is used to interconnect chips in various high current Wafer Level Packaging (WLP) applications. Typically, Cu RDLs with thicknesses of 5-9 µm and widths of 5-20 µm are used for high current sourcing. In this case, the temperature of the Cu RDL metal line increases due to the Joule heat generated when current passes through the metal line. If a... » read more

Overlay Optimization In Advanced IC Substrates
By Ed Sperling - 29 Apr, 2024 - Comments: 1

Overlay is becoming a significant problem in the manufacturing of semiconductors, especially in the world of advanced packaging substrates — think panels — the larger the area, the greater the potential for distortion due to warpage. Solving this issue requires more accurate models, better communication through feed forward/feed back throughout the flow, and real-time analytics that are bak... » read more

Electromigration Concerns Grow In Advanced Packages
By Laura Peters - 18 Apr, 2024 - Comments: 0

The incessant demand for more speed in chips requires forcing more energy through ever-smaller devices, increasing current density and threatening long-term chip reliability. While this problem is well understood, it's becoming more difficult to contain in leading-edge designs. Of particular concern is electromigration, which is becoming more troublesome in advanced packages with multiple ch... » read more

Yield Tracking In RDL
By Ed Sperling - 07 Feb, 2024 - Comments: 0

Yield is a much bigger issue when it comes to panel-level packages, which may contain up to 24 RDL layers. Just finding the defects is a massive challenge, let alone understanding how they will impact the entire device. Many of these advanced packages are being used in data centers for generative AI, and killer defects caused by bridges and opens can cause serious problems. What happens, for in... » read more

Fan-Out Panel-Level Packaging Hurdles
By Anne Meixner - 24 Jan, 2024 - Comments: 0

Fan-out panel-level packaging (FOPLP) promises to significantly lower assembly costs over fan-out wafer-level packaging, providing the relevant processes for die placement, molding and redistribution layers (RDLs) formation can be scaled up with equivalent yield. There is still much work to be done before that happens. Until now, FOPLP has been adopted for devices that are manufactured in ve... » read more

Electromigration Performance Of Fine-Line Cu Redistribution Layer (RDL) For HDFO Packaging
By JiHye Kwon - 18 Jan, 2024 - Comments: 1

The downsizing trend of devices gives rise to continuous demands of increasing input/output (I/O) and circuit density, and these needs encourage the development of a High-Density Fan-Out (HDFO) package with fine copper (Cu) redistribution layer (RDL). For mobile and networking application with high performance, HDFO is an emerging solution because aggressive design rules can be applied to HDFO ... » read more

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