Patent ID: 7221157

Claim:
A magnetic sensor apparatus comprising: a semiconductor substrate; at least one Hall element forming arrangement that is formed on the semiconductor substrate, wherein each of the at least one Hall element forming arrangement includes a Hall element that is formed in a principal surface of the semiconductor substrate; and a base that is disposed at a rear surface of the semiconductor substrate and holds the semiconductor substrate and the at least one Hall element forming arrangement, wherein: the base includes: a holding surface, which holds the semiconductor substrate; and at least one slant surface, which is slanted relative to the holding surface; and each of the at least one Hall element forming arrangement is held on a corresponding one of the at least one slant surface of the base, wherein: a recess is recessed in the rear surface of the semiconductor substrate; the recess extends around the Hall element of each Hall element forming arrangement; a portion of the recess penetrates through the semiconductor substrate except a connecting part of each Hall element forming arrangement; the connecting part of each Hall element forming arrangement is thinner than an adjacent part of the Hall element forming arrangement, which is adjacent to the connecting part of the Hall element forming arrangement; and the connecting part of each Hall element forming arrangement is plastically deformed to place the Hall element forming arrangement on the corresponding slant surface of the base.