Waterproof pressure sensor and method for manufacturing waterproof pressure sensor

A method for manufacturing a waterproof pressure sensor, the method comprising:

• providing a cavity package including a recess and an edge portion surrounding the recess;
• mounting a pressure detection element in the recess;
• providing a cover member having a pressure introducing hole and an exhaust structure communicating with the pressure introducing hole;
• attaching the cover member to the edge portion of the cavity package such that the exhaust structure faces the recess and the pressure introducing hole is disposed above the recess at a center thereof, the pressure introducing hole having a diameter smaller than a diameter of an opening of the recess;
• injecting a liquid agent into the recess from the pressure introducing hole such that the liquid agent fills the recess and a space under the exhaust structure;
• and
• gelling the liquid agent into a gel agent,
• wherein in injecting the liquid agent into the recess, air bubbles in the liquid agent are guided upward along the exhaust structure and discharged to outside of the cover member through the pressure introducing hole.