The startup mode of spinoffs founded by RD employees (RD spinoffs) within the same industry is widespread in high-tech industries. The founders usually own specific human capital and key technological capability, enabling them to take the operational risk and to appropriate rewards of innovations under the industrial environment of rapid technological change. Whether high-tech RD spinoffs, compared to their other spinoff counterparts, have better RD productivity remains less well explored. According to the conceptual discussion of the advantages of intangible innovation assets embodied in company founders, this study argues that the founders' innovation cognition, knowledge externalities, absorptive capability and routine experience can help RD spinoffs to have higher RD productivity. We thus propose three hypotheses that are then empirically tested. Based on a sample of Taiwanese electronics firms, the empirical findings show that RD spinoffs invest with a higher RD intensity and on average have more patents issued. More importantly, the microeconometric estimates show that the patent and output elasticities of the RD of RD spinoffs are significantly higher than those of other firms, indicating that they actually have higher RD productivity.