A novel locking mechanism for mounting a radio to an antenna. The release agent can be any fluorinated or non-fluorinated phosphorous-containing organic acid. The electrode array includes bipolar electrodes positioned so a first spacing between a pair of adjacent electrodes is different relative to a second spacing between at least one other pair of adjacent electrodes. The number of unique measured magnetic field values generated must be at least equal to the sum of the number of gain and location factors calculated. In addition, the brush head of the present invention can be formed star shape or be inclined to improve the area of contact for super cleaning and be convenient for removing the deposit on the teeth. The first gate structure includes the first dielectric layer, the metal layer, and the semiconductor layer sequentially stacked on the substrate.