集成电路物理设计中的布局问题研究

Placement technology in VLSI physical design

在超大规模集成电路设计中,物理设计布局阶段决定来可移动标准单元和宏模块的位置,其结果直接影响后续布线和版图优化等。随着设计规模不断扩大,布局问题需要面对数百万级以上的电路规模,求解质量和效率一直是工业界和学术界关注的热点。本文介绍了物理设计流程中布局问题,包括布局问题定义、布局方法分类及多种优化目标下的布局技术。此外,本文还探讨了当前基于人工智能布局决策技术。

Placement is one of the most important step in the VLSI design flow.As it determines the locations of movable standard cells and macros in the physical layout,its quality has significant impacts on the later stages in the flow,such as routing and postlayout optimization.In this paper,we discuss the placement in physical design,including problem formulation,placement categories,and placement techniques in various objective optimization.Besides,we also introduce the placement decision-making by artificial intelligence techniques.