The purpose of this thesis is to study α-quartz by using MEMS process technology to finish the quartz oscillator under the nature frequency of the first flexible mode at 35kHz. We can get the best etch times and etch cross-section by the two-face etch experiment of quartz oscillator. Finally using the parameters of etch rates and etch times from the experiments we can design the process or size of quartz oscillator and the size of mask. And then use MEMS process technology to finish the quartz oscillator.