A micrometer-scale ion trap, fabricated on a monolithic chip using semiconductor micro-electromechanical systems technology. The crown has an annular skirt with an annular edge. The two Q-enhancement circuits are combined to generate sufficient negative impedance to compensate for the loss in the on-chip low Q inductors. Therefore, a breakdown voltage of the device is increased, and an on resistance of the device is decreased due to the n lattice with high concentration. A method for manufacturing a wavelength conversion member, including the steps of: subjecting a preform made of a powder mixture containing a glass powder and an inorganic phosphor powder to heat treatment, thereby obtaining a sintered powder product; and re-press molding the sintered powder product with a die.