中文摘要：

类金刚石（DLC）膜是由sp^3键和sp^2键组态的碳混合组成，已广泛应用到电子、光学、机械等领域。采集1975～2007年国内外DLC技术专利，建立专利数据库，从技术和竞争两个方面对其发展脉络和竞争格局进行定量和定性分析，揭示出国内外DLC技术已处于成熟阶段；半导体电子、光电信息、机械加工、耐磨部件以及医疗器材是其重点应用领域；世界上前10位申请人基本上是美国、日本和德国的跨国企业；在申请数量和质量上国外申请人在我国都占很大优势；目前国内DLC市场基本为国外企业垄断；最后提出了一些发展我国DLC技术的专利战略。

英文摘要：

Diamond like carbon film （DLC） is a carbon material that consists of sp^3 hybrid orbital and sp2 hybrid orbital phases. Because DLC film has excellent mechanical, electric, optical, thermal, biocompatible properties which is similar to diamond film, Its application fields are more and more broad. DLC film technology patent documents worldwide from 1975 to 2007 was collected in this paper. Associated patent databases were estab- lished. The development thread and competition pattern of DLC film were investigated on both of technology and competitiveness upon quantity and quality analysis. the mature stage; （2） Semiconductor, electro-optical Results show that： （1）DLC film technology has been at information, tools, wear-resistant partsKmedical instruments areas are the focus of its application areas; （3） The top 10 important applicants Worldwide were listed, They were basically the multinational corporations of USA, Japan and Germany; （4） The number and the quality of the foreign applicants＇s patents are more than native applicants＇s patents;（5） At present the native DLC film industries were basically monopolized by foreign enterprises; （6） The patent strategy of DLC film technology were discussed.