Redefining XPU Memory For AI Data Centers Through Custom HBM4: Part 2


This is the second in a three-part series from Alphawave Semi on HBM4 and gives insights into HBM implementation challenges. Click here for part 1, for an overview on HBM, and in part 3, we will introduce details of a custom HBM implementation. Implementing a 2.5D System-in-Package (SiP) with High Bandwidth Memory (HBM) is a complex process that spans across architecture definition, designi... » read more

The Evolution of HBM


High-bandwidth memory originally was conceived as a way to increase capacity in memory attached to a 2.5D package. It has since become a staple for all high-performance computing, in some cases replacing SRAM for L3 cache. Archana Cheruliyil, senior product marketing manager at Alphawave Semi, talks about how and where HBM is used today, how it will be used in the future, why it is essential fo... » read more

Redefining XPU Memory For AI Data Centers Through Custom HBM4: Part 1


This is the first of a three-part series on HBM4 and gives an overview of the HBM standard. Part 2 will provide insights on HBM implementation challenges, and part 3 will introduce the concept of a custom HBM implementation. Relentless growth in data consumption Recent advances in deep learning have had a transformative effect on artificial intelligence (AI) and the ever-increasing volume of ... » read more

HBM Options Increase As AI Demand Soars


High-bandwidth memory (HBM) sales are spiking as the amount of data that needs to be processed quickly by state-of-the-art AI accelerators, graphic processing units, and high-performance computing applications continues to explode. HBM inventories are sold out, driven by massive efforts and investments in developing and improving large language models such as ChatGPT. HBM is the memory of ch... » read more

One Chip Vs. Many Chiplets


Experts at the Table: Semiconductor Engineering sat down to discuss the growing list of challenges at advanced nodes and in advanced packages, with Jamie Schaeffer, vice president of product management at GlobalFoundries; Dechao Guo, director of advanced logic technology R&D at IBM; Dave Thompson, vice president at Intel; Mustafa Badaroglu, principal engineer at Qualcomm; and Thomas Ponnusw... » read more

Hybrid Bonding Makes Strides Toward Manufacturability


Hybrid bonding is gaining traction in advanced packaging because it offers the shortest vertical connection between dies of similar or different functionalities, as well as better thermal, electrical and reliability results. Advantages include interconnect scaling to submicron pitches, high bandwidth, enhanced power efficiency, and better scaling relative to solder ball connections. But whil... » read more

UMI: Extending Chiplet Interconnect Standards To Deal With The Memory Wall


With the Open Compute Project (OCP) Summit upon us, it’s an appropriate time to talk about chiplet interconnect (in fact the 2024 OCP Summit has a whole day dedicated to the multi-die topic, on October 17). Of particular interest is the Bunch of Wires (BoW) interconnect specification that continues to evolve. At OCP there will be an update and working group looking at version 2.1 of BoW. (... » read more

Working With Chiplets


The usual method of migrating to the next process node to cram more features onto a piece of silicon no longer works. It's too expensive, and too limited for most applications. The path forward is now heterogeneous chiplets targeted at specific markets, and while logic will continue to scale, other features are being separated out into chiplets developed using different process technologies. Th... » read more

Barriers To Chiplet Sockets


Experts At The Table: Demand for chiplets is growing, but debate continues about whether standards and general-purpose chiplets will kick-start the commercialization boom, or whether success will come through customization of those chiplets. Semiconductor Engineeering sat down to discuss these and other related issues with Elad Alon, CEO of Blue Cheetah; Mark Kuemerle, vice president of technol... » read more

Enabling Innovative Multi-Vendor Chiplet-Based Designs


Chiplets have emerged as a critical implementation paradigm for semiconductor products, primarily because they can deliver cost benefits relative to a non-chiplet-based approach. The first, most well-proven, and obvious benefit of a chiplet-based approach is manufacturing cost. Manufacturing cost benefits are accrued either from the appropriate selection of chiplet die size, or by optimizin... » read more

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