metal ball combination may be inclined relative to a top surface thereof by an angle of 90 u03b8 u00b0 so that a frame used to form a pdms metal ball combination is separated easily from the pdms metal ball combination the performance of the microvalve including the maximum allowable pressure of a microchannel a valve response time and fluid flow can be controlled according to a geometric shape of the pdms metal ball combination illustrated in fig4 a through 4c a diameter d of a metal ball a thickness a of a pdms layer between the microchannel and the metal ball 32 and the magnitude of the magnetic force being exerted on the magnet for example the maximum allowable pressure can be increased by increasing the diameter d of the metal ball 32 and the magnitude of the magnetic force of the magnet furthermore the flow of fluids flowing through the microvalve can be controlled by adjusting the magnitude of the magnetic force of the microvalve also while being manufactured separately from a substrate a pdms metal ball combination may be mass produced to a standard size and be used to form a microvalve a process of manufacturing a magnetic microvalve using a metal ball according.