Micro Drill Bit Design on the Basis of the Combination of Theoretical Analysis, Numerical Simulation and Experimental Verification

摘要

To improve the design efficiency of a micro drill bit, a method on the basis of the combination of theoretical analysis, numerical simulation and experimental verifications is presented. As examples, the theoretical analyses of drill bit stress and rigidity conditions are investigated with emphasis. To perform such analyses, the finite element analysis (FEA) is recommended. To examine the accuracy of the theoretical analysis result and the performance of designed micro drill bit, experimental verification is conducted. Two design examples using the presented design method, namely one design of micro drill bit for flexible PCB (FP type) and the other for high Tg PCB (HT type) are discussed.