Transducer

A transducer comprising, when three axes orthogonal to each other are set as an X axis, a Y axis, and a Z axis:

• a first substrate;
• a second substrate that is disposed to overlap the first substrate in a Z axis direction along the Z axis and is provided with an insulating layer on a surface of the second substrate;
• a functional element provided between the first substrate and the second substrate;
• and
• a metal eutectic layer that bonds the first substrate and the second substrate to each other in a bonding region positioned around the functional element, wherein
• a recess is provided in a first surface of the second substrate on the first substrate side,
• the recess is configured with
• a second surface that is a bottom, and
• a side wall that connects the first surface and the second surface,
• the insulating layer includes
• a first portion provided on the first surface,
• a second portion provided on the side wall, and
• a third portion provided on the second surface, and
• the bonding region is disposed between second portions, each of which is the second portion of the insulating layer, when viewed in plan in a Y axis direction along the Y axis.