Accepted: 2026-07-30
Abstract Purpose As technological competition increasingly becomes the focus of global attention, identifying key core technologies (KCTs) is of great significance for seizing the technological high ground, promoting national economic development, and safeguarding national security.
Design/methodology/approach Based on a clear definition of the concept and characteristics of KCTs, this study proposes a field–topic–technology (FTT) identification method, which follows a progressive, multi-method fusion approach that combines primary and auxiliary recognition paths. The FTT method is empirically applied to patents in the field of small-molecule targeted therapies for lung cancer. The primary path of the method proceeds as “core subfield → core topic → KCTs”, while the auxiliary path follows “core subfield → stage-based topic evolution trends → auxiliary identification of KCTs.” Through the combination of primary and auxiliary paths and a progressive hierarchical approach, this method achieves systematic identification of KCTs. Meanwhile, the LightGBM model is employed for indicator weighting, enhancing the scientific validity and objectivity of the weighting process.
Findings The study successfully identifies six KCTs in the field of small-molecule targeted therapies for lung cancer. Comparative analyses with other identification methods as well as with official documents and high-impact publications verify the scientificity, feasibility, effectiveness, and robustness of the FTT method. Empirical evidence demonstrates that this method is suitable for fields with abundant patent data and relatively clear technological evolution pathways.
Research limitations Although this study constructs a KCTs identification framework, several limitations remain in the identification process. First, the characteristics of KCTs are multidimensional and complex; this study selects indicators only from four dimensions, which makes it difficult to fully capture their intrinsic attributes. Second, the constructed indicator system mainly relies on quantitative indicators, with insufficient representation of qualitative factors such as tacit knowledge and engineering experience. Third, this study is primarily based on patent data and does not fully integrate multi-source information such as academic publications, industry standards, and policy documents, which may lead to certain biases in the identification results. In addition, the empirical validation is conducted in a single field, and the cross-field applicability of the method still requires further examination. Future research may enhance the comprehensiveness and robustness of KCTs identification by expanding feature dimensions, integrating multi-source heterogeneous data, and conducting cross-field validation.
Practical implications The proposed FTT approach supports technology intelligence and strategic decision-making through KCT identification and technological evolution tracking. It can be extended to other patent‑rich technology fields to support R&D planning and policy formulation.
Originality/value Addressing existing research gaps – such as limited conceptual dimensions, fragmented identification methods, and lack of focus – this study defines the concept and attribute features of KCTs from multiple dimensions and constructs a hierarchical, multi-dimensional, and multi-method KCT identification framework that progresses from the macro field level to the micro technology level, integrating both primary and auxiliary recognition paths. Compared with previous studies that relied on single methods or linear processes, the proposed approach demonstrates stronger logical hierarchy, systematic structure, and methodological rigor. Furthermore, by introducing a machine learning-based approach for dynamic learning and nonlinear optimization of indicator weights, this study overcomes the limitations of traditional weighting methods and enhances the scientificity and objectivity of the identification results. Overall, this research achieves conceptual and methodological innovation in KCT identification, offering new perspectives for hierarchical system construction and indicator weighting optimization, and providing valuable references for subsequent studies and practical applications.