为什么要采用先进封装？ 自半导体工业诞生以来，集成电路就一直被封装在封装件中。最初的想法主要是保护内部脆 弱的硅片不受外部环境的影响，但在过去的十年中，封装的性质和作用发生了巨大的变化。 虽然芯片保护仍然重要，但它已成为封装中最不引人关注的作用。 本文探讨了封装领域最大的变化，即通常所说的先进封装。先进的含义并没有明确的定义。相反， 该术语广泛涵盖了多种可能的封装方案，所有这些方案都比传统的单芯片封装复杂得多。先进封装 通常封装了多个元件，但组装方式却千差万别。 在这种讨论中，经常会提到 2.5D 或 3D 封装，这些描述指的是内部元件的排列方式。 本文首先讨论了从外部观察到的封装类型，然后向内讨论了高级封装所集成的基本组件。之后，将 更详细地探讨每个组件。大部分讨论将涉及高级软件包的各种组装过程。文章最后探讨了任何技术 讨论都必须涉及的四个主题--工程师如何设计先进封装、如何对其进行测试、先进封装的总体可靠 性影响以及任何安全影响。 文章还简要讨论了两个相关的广泛话题。首先是键合。虽然这是封装的一个必要组成部分，但它本 身也是一个很大的话题，在此不作详细讨论。其次是不属于集成电路但可能包含在封装中的各类元 ...

Core Viewpoint - The article emphasizes the critical role of packaging technology, particularly 2.5D packaging, in the development of AI chips, highlighting Intel's EMIB technology as a key solution to meet the growing demands in this sector [1][3][30]. Group 1: Importance of 2.5D Packaging - 2.5D packaging is not a new concept but has gained renewed significance in the AI chip domain, allowing for the integration of multiple functional units within a single package, thus providing a balance between complexity and performance [3][4]. - AI chips require high bandwidth and low latency for efficient inter-chip communication, which traditional packaging methods struggle to provide. 2.5D packaging enhances data transfer efficiency while maintaining a simpler manufacturing process [3][4]. Group 2: Advantages of EMIB Technology - EMIB technology offers several advantages: lower costs due to high wafer utilization, higher yield by reducing complex processing steps, and faster production cycles compared to traditional methods [4][5][8]. - EMIB's design allows for greater scalability and flexibility, making it suitable for integrating more HBM or complex workloads, thus enhancing performance potential for AI applications [8][9]. Group 3: Intel's Leadership in Packaging Technology - Intel has been a pioneer in packaging technology for over fifty years, continuously advancing from early wire-bond architectures to modern 2.5D and 3D technologies, establishing itself as a leader in the field [13][20]. - The company has completed over 250 2.5D design projects across various applications, demonstrating its extensive experience and capability in advanced packaging solutions [27]. Group 4: Future Developments - Intel is actively working on larger packaging sizes and exploring glass substrate technology, which is expected to become mainstream in the coming years, further enhancing packaging capabilities for AI accelerators [29][30].