Method for fabrication of rear chip for hall effect magnetic head

Claim 1

In a method for fabricating a rear chip for a Hall effect magnetic head, comprising steps of producing a rear core substrate block with a multiplicity of Hall elements embedded therein in predetermined spacial relation to each other, producing a rear core block with a multiplicity of rear core protrusions, securing said rear core block onto said rear core substrate block through a member of non-magnetic material in such a manner that said rear core protrusions are in opposed relation with said Hall elements respectively, and cutting into a multiplicity of rear chips the assembly including said rear core substrate block and said rear core block; the improvement further comprising steps of forming a plurality of rear core supports between said rear core protrusions respectively in such a manner that the bottoms of said rear core supports are in the same plane as the bottoms of said rear core protrusions, securing said rear core block to said rear core substrate block in such a manner that the width of the bottom of each of said rear core protrusions is substantially equal to the width near a Hall output terminal of each of said Hall elements along the control current flow therein and that the bottom of each of said rear core protrusions is in opposed relation to each of said Hall elements, said rear core supports preventing any pressure from being applied to said Hall elements, and removing said rear core supports.