Samsung Electronics, a world leader in advanced semiconductor technology, today announced the immediate availability of its next-generation 2.5D packaging technology Interposer-Cube4 (I-Cube4), leading the evolution of chip packaging technology once again.

Samsung’s I-Cube^TM is a heterogeneous integration technology that horizontally places one or more logic dies (CPU, GPU, etc.) and several High Bandwidth Memory (HBM) dies on top of a silicon interposer, making multiple dies operate as a single chip in one package.

Samsung’s new I-Cube4, which incorporates four HBMs and one logic die, was developed in March as the successor of I-Cube2. From high-performance computing (HPC) to AI, 5G, cloud and large data center applications, I-Cube4 is expected to bring another level of fast communication and power efficiency between logic and memory through heterogeneous integration.

“With the explosion of high-performance applications, it is essential to provide a total foundry solution with heterogeneous integration technology to improve the overall performance and power efficiency of chips,” said Moonsoo Kang, senior vice president of Foundry Market Strategy at Samsung Electronics. “With the mass-production experience amassed through I-Cube2 and the commercial breakthroughs of I-Cube4, Samsung will wholly support customers’ product implementations.”

In general, the silicon interposer area proportionally increases to accommodate more logic dies and HBMs. Since the silicon interposer in the I-Cube is thinner (around 100㎛ thick) than paper, the chances of bending or warping a larger interposer become higher, which negatively impacts product quality.

With strong expertise and knowledge on semiconductors, Samsung has studied how to control interposer warpage and thermal expansion through changes to material and thickness, succeeding in commercializing the I-Cube4 solution.

Additionally, Samsung has developed its own mold-free structure for I-Cube4 to efficiently remove heat and enhanced its yield by conducting a pre-screening test that can filter out defective products during the fabrication process. This approach provides additional benefits such as a reduction in the number of process steps, which result in cost savings and shorter turnaround time.

Since the launch of I-Cube2 in 2018 and eXtended-Cube (X-Cube) in 2020, Samsung’s heterogeneous integration technology has signaled a new era in the high-performance computing market. Samsung is currently developing more advanced packaging technologies to I-Cube6 and higher by using a combination of advanced process nodes, high speed interface IPs and advanced 2.5/3D packaging technologies, which will help customers design their products in the most effective way.

I-Cube4TM (Interposer Cube) Package Structure

Baidu KUNLUN chip is built on the company’s advanced XPU, a home-grown neural processor architecture for cloud, edge, and AI, as well as Samsung’s 14-nanometer (nm) process technology with its I-Cube (Interposer-Cube) package solution.

The chip offers 512 gigabytes per second (GBps) memory bandwidth and supplies up to 260 Tera operations per second (TOPS) at 150 watts. In addition, the new chip allows Ernie, a pre-training model for natural language processing, to infer three times faster than the conventional GPU/FPGA-accelerating model.

Leveraging the chip’s limit-pushing computing power and power efficiency, Baidu can effectively support a wide variety of functions including large-scale AI workloads, such as search ranking, speech recognition, image processing, natural language processing, autonomous driving, and deep learning platforms like PaddlePaddle.

Through the first foundry cooperation between the two companies, Baidu will provide advanced AI platforms for maximizing AI performance, and Samsung will expand its foundry business into high performance computing (HPC) chips that are designed for cloud and edge computing.

“We are excited to lead the HPC industry together with Samsung Foundry,” said OuYang Jian, Distinguished Architect of Baidu. “Baidu KUNLUN is a very challenging project since it requires not only a high level of reliability and performance at the same time, but is also a compilation of the most advanced technologies in the semiconductor industry. Thanks to Samsung’s state of the art process technologies and competent foundry services, we were able to meet and surpass our goal to offer superior AI user experience. ”

“We are excited to start a new foundry service for Baidu using our 14nm process technology,” said Ryan Lee, vice president of Foundry Marketing at Samsung Electronics. “Baidu KUNLUN is an important milestone for Samsung Foundry as we’re expanding our business area beyond mobile to datacenter applications by developing and mass-producing AI chips. Samsung will provide comprehensive foundry solutions from design support to cutting-edge manufacturing technologies, such as 5LPE, 4LPE, as well as 2.5D packaging.”

As higher performance is required in diverse applications such as AI and HPC, chip integration technology is becoming more and more important. Samsung’s I-Cube technology, which connects a logic chip and high bandwidth memory (HBM) 2 with an interposer, provides higher density/ bandwidth on minimum size by utilizing Samsung’s differentiated solutions.

Compared to previous technology, these solutions maximize product performance with more than 50% improved power/signal integrity. It is anticipated that I-Cube technology will mark a new epoch in the heterogeneous computing market. Samsung is also developing more advanced packaging technologies, such as redistribution layers (RDL) interposer and 4x, 8x HBM integrated package.

2.5D Package Structure

About Baidu

Baidu, Inc. is the leading Chinese language Internet search provider. Baidu aims to make the complicated world simpler through technology. Baidu’s ADSs trade on the NASDAQ Global Select Market under the symbol “BIDU”. Currently, ten ADSs represent one Class A ordinary share.