• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.291-292
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• 2007

• Proceedings of the KIEE Conference
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• 1998.07d
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• pp.1500-1502
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• 1998

Electro Discharge Machining (EDM) is a so-call nonconventional machining technique. This paper presents the experimental results of an EDM technique for the fabircation of microholes on #7440 pyrex glass substrates. With various applied voltages and various concentration of NaOH or KOH solution, the glass substrates have been microdrilled using the copper electrodes of which diameters are 250 ${\mu}m$ to 450 ${\mu}m$. The machined throughholes have been observed the top diameter, the bottom diameter and machining time have been measured. EDM in NaOH solution causes the fabrication to have better the surface condition, higher selective of electrode, lower concentration of solution with respect to EDM in KOH solution machined fabrication.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1998.06a
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• pp.427-430
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• 1998

Electro Discharge Machining (EDM) is a so-call non-conventional machining technique. This paper presents the experimental results of an EDM technique for the fabrication of microholes on #7440 pyrex glass substrates. With various applied voltages and at various concentration of NaOH solution, the glass substrates have been microdrilled using the copper electrodes of which diameters are 250 $\mu\textrm{m}$ to 450 $\mu\textrm{m}$. The machined throughholes have been observed the top diameter, the bottom diameter and machining time have been measured. The experimental results show that the machining time decreases as the concentration of NaOH solution increases, the applied voltage increases and the needle diameter decreases. Also, the top diameter increases as the needle diameter increases or the applied voltage increases. The bottom diameter decreases as the needle diameter decreases or the applied voltage decreases.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1997.11a
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• pp.393-396
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• 1997

Electro Discharge Machining (EDM) is a so-call non-conventional machining technique. This paper presents the experimental results of an EDM technique for the fabircation of microholes on #7440 pyrex glans. With various applied voltages and at various concentration of KOH solution, the glass substrate have been microdrilled using the copper electrodes of which diameters are 250$\mu\textrm{m}$ to 450$\mu\textrm{m}$, respectively. The machined throughholes have been observed the top diameter, the bottom diameter, hollow width and hole diameter of the hole, and machining time hale been measured. The experimental results show that the machining time decreases as the concentration of KOH solution increases or the applied voltage increase. Also, The top diameter increases as the concentration of KOH solution decreases or the allied voltage increases. The bottom and hollow width decreases as the of KOH solution increases or the applied voltage decreases.