公开(公告)号：JPH1140047A

公开(公告)日：1999-02-12

申请号：JP12436698

申请日：1998-05-07

Applicant: IBM

Inventor： KNICKERBOCKER JOHN U ,  HUMENIK JAMES N ,  KNOX ANDREW R ,  ROSENBERG ROBERT

IPC: H01J3/00 ,  H01F7/02 ,  H01F41/16 ,  H01J1/46 ,  H01J9/14 ,  H01J29/46 ,  H01J29/68 ,  H01J31/12

Abstract: PROBLEM TO BE SOLVED: To form a magnet by forming apertures in a metal sheet, fixing at least one ferrite layer on the first surface, fixing at least one dielectric layer on the second surface, and forming apertures which partially overlap with the apertures of the metal sheet through the ferrite layers and the dielectric layers. SOLUTION: A photoresist is detached from a metal sheet 105. Etched metal sheet 105 is examined, and it can be confirmed that all of apertures 65 exist and dimensional tolerance and positional tolerance of the apertures are met. The metal sheet 105 needs to be formed so that adhesion of the metal sheet 105 itself to the following ferrite layers 15 or the dielectric layers 13 or both of them is strengthened. The ferrite layers 15 are formed by generating slurry moldable as a thin ferrite-sheets by combining a ferrite material, glass powder, an organic binder, a solvent, and a vehicle. At the same time, a dielectric material, as slurry, is converted into the dielectric layers 13.