Abstract: Take advantage of IPC and technology field information of patents, this paper constructs a framework for analyzing evolutionary path of nanotechnology based on technology co-occurrence network. We investigate the distribution of different technology fields in nanotechnology based on patent data of USPTO, and examine the convergence development pattern of technology fields in nanotechnology. Then we summarize the evolution mechanism of nanotechnology and provide some references for China's development strategy of nanotechnology.

摘要： 基于技术共现网络分析方法，利用专利的IPC分类（国际专利分类）及其所属的技术领域信息，构建纳米技术演化路径分析框架；采用美国专利和商标局（USPTO）专利数据，分析纳米技术分支领域的演化路径，考察纳米技术与相关技术领域融合发展的实现模式，揭示纳米技术演化的规律，为我国纳米技术发展战略设计提供一定参考。

关键词: 专利, 技术共现网络, 纳米技术, 演化路径