| 摘要 |
PURPOSE:The insulating material such as Al2O3 is coated on the surface of quartz crystal oscillator holding unit which is composed of conductive material for the most part of external surface of the holding unit. And the conductive thin film is formed as if it divided electrically the above mentioned insulating film. As a result, the quartz crystal oscillation type watch can be finished more compact and thin structure with reduced cost. |
