Sensor chip, magnetic sensor having the same, and magnetic sensor manufacturing method

A sensor chip comprising:

• a chip main body having mounting surface and an upper surface positioned on an opposite sides to each other, and an element formation surface substantially perpendicular to the mounting surface and upper surface and including a lower area positioned close to the mounting surface side, an upper area positioned close to the upper surface side, and a center area positioned between the upper area and the lower area;
• first and second magnetic layers provided on the center area of the element formation surface and face each other through a magnetic gap;
• a magnetism detection element provided on the center area of the element formation surface and positioned on a magnetic path formed by the magnetic gap;
• an insulating layer provided on the element formation surface and covering the magnetism detection element and first and second magnetic layers;
• a terminal electrode provided at a part of a surface of the insulating layer that covers the lower area of the element formation surface and connected to the magnetism detection element;
• and
• a first alignment mark embedded in a part of the insulating layer that covers the upper area of the element formation surface and visually confirmable from the upper surface,
• wherein a position of the first alignment mark in an extending direction of an edge between the element formation surface and the upper surface overlaps the first magnetic layer.