| abstract |
Disclosed is a manufacturing method for a piezoelectric oscillator that is provided with a step allowing reliable screening of piezoelectric oscillators that have a danger of becoming defective products by way of adhesion of dirt or foreign matter as defective products. In this manufacturing method for a piezoelectric oscillator (1), a substrate (10) is prepared, a piezoelectric resonator element (20) is mounted on the substrate (10), the piezoelectric resonator element (20) is exposed to an environment of higher temperature than the surrounding temperature and of higher humidity than the surrounding atmosphere before or after packaging material (15) is bonded to the substrate (10), electrical characteristics are measured after exposure to the environment, and adhesion of dust and/or foreign matter is detected by way of change in the electrical characteristics. |