This study analyzes strategies for enhancing the market competitiveness of a latecomer manufacturer in technology-based material and part sector, focusing on the case of Daelim's polyimide business unit. It presents a strategic approach for latecomer companies to gain a competitive advantage in the market. Specifically, this study examines the case of Daelim, which has achieved success by establishing an independent business unit and adopting innovative management strategies. The case was analyzed in terms of subject, environment, resources, and mechanism based on the ser-M model. The analysis showed that since establishing the independent business unit, Daelim has focused on the display market to expand its market share and strengthen its competitiveness through technology development and production infrastructure. In particular, its success has been driven by market segmentation and a strategy of choice and concentration, close collaboration with customers, and rapid decision-making and execution. The company also improved its internal organizational culture, strengthened its customer network, implemented a segmented market-specific pricing strategy, and increased brand awareness. The company overcame the limitations of being a latecomer and solidified its position in the global market. These strategies have important implications for how latecomer companies can secure competitiveness in the global market. The findings suggest that latecomer manufacturers of materials and parts must adopt the independent business unit structure, develop novel technologies, make customer-centric value propositions, and design flexible strategic responses to strengthen their market competitiveness.