Oscillator Manufacturing Method

An oscillator manufacturing method comprising:

• preparing a structure including a control circuit having a storage section and a correction circuit, a mother substrate on which a terminal coupled to the control circuit is disposed, a vibration element that is disposed corresponding to the control circuit and constitutes an oscillator together with the control circuit, and a lid that accommodates the vibration element together with the mother substrate;
• a first measurement step of supplying a signal to the control circuit via the terminal to measure a frequency of the oscillator;
• storing, in the storage section, correction information to be used in the correction circuit in accordance with the measured frequency, and adjusting the frequency of the oscillator to a first frequency;
• individualizing the structure for each oscillator including the vibration element, the control circuit, and the terminal;
• a second measurement step of supplying the signal to the control circuit via the terminal to measure the frequency of the oscillator;
• and
• performing a fault diagnosis on the oscillator by comparing the frequency of the oscillator measured in the second measurement step with the first frequency.