Patent ID: 7708051

Claim:
A method for the manufacture of a physical quantity detector comprising a cylindrical part of which one end is closed with a strain generating part and a sensor part formed on the strain generating part, characterized in that said cylindrical part is produced by melting an alloying material having a composition capable of yielding an amorphous alloy, injecting the resultant molten alloy into a metal mold, and cooling the molten alloy in the metal mold to confer amorphousness on the alloy, wherein said metal mold comprises a split mold having at least two split parts for forming a cavity, an insert core to be inserted into the mold so as to form a surface of the cavity corresponding to an outside surface of the strain generating part, and an insert pin to be inserted into the cavity so as to define the inner configuration of said cylindrical part, and wherein the surface of said cavity corresponding to the outside surface of the strain generating part is formed in a flat surface by a surface of said insert core having a surface area larger than a surface area of the outside surface of said strain generating part.