Crystal vibration device

A crystal vibration device comprising:

• a mounting board having an upper surface, a lower surface, and a side surface;
• at least one terminal on the lower surface of the mounting board;
• at least one connection electrode electrically connected to the at least one terminal and extending on the side surface of the mounting board and reaching the upper surface of the mounting board;
• at least one electrode land on the upper surface of the mounting board and electrically connected to the at least one connection electrode;
• a first package material having first surface and a second surface;
• at least one terminal electrode on the second surface of the first package material and electrically connected to the at least one electrode land;
• a crystal vibrator on the first surface of the first package material;
• a temperature-sensitive element on the second surface of the first package material, wherein
• the at least one connection electrode having first and second portions, the first portion being located on the upper surface of the mounting board and connected to the at least one electrode land, the second portion being located on the side surface of the mounting board and connected to the first portion and the at least one terminal, the first portion of the at least one connection electrode extending toward the at least one electrode land in a first direction, the first portion of the at least one connection electrode has a first part and a second part, and the first part is smaller than the second part along a second direction orthogonal to the first direction in a plan view of the crystal vibration device;
• and
• a resist insulating material on the upper surface of the mounting board and crossing over at least a portion of the first portion of the connection electrode in the second direction.