Patent ID: 7494838

Claim:
A manufacturing method of a magnetic sensor encapsulating at least one magnetic sensor chip having sensitivity to magnetism in at least one direction in a molded resin, comprising the steps of: providing a lead frame made of a thin metal plate, which comprises at least two stages, a frame having a plurality of leads arranged so as to encompass the stages, and a plurality of interconnecting members for interconnecting together the frame and the stages; inclining the stages relative to the frame upon plastic deformation of the interconnecting members; pressing the stages under pressure while fixing the frame in a prescribed position, thus elastically deforming the interconnecting members; bonding the magnetic sensor chip onto the stage while the stage and the frame are both placed substantially in a same plane; arranging wires so as to interconnect together the leads and the magnetic sensor chip; and releasing the stages from the pressure, thus restoring the interconnecting members from elastically deformed states thereof.