Method of manufacturing a magnetic head with an MR element

• US 4,733,455 A
• Filed: 07/29/1986
• Issued: 03/29/1988
• Est. Priority Date: 08/07/1985
• Status: Expired due to Fees

• Current Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Tanaka, Yoshimasa, Nakashima, Takayuki, Murakami, Masaki, Takeda, Kouji, Naoi, Mikio, Nakamura, Hiroshi, Imaoka, Hirofumi
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US06/891,516
• Time in Patent Office: 609 Days
• Field of Search: 29/603, 29/827, 360/113, 360/122, 264/272.16
• US Class Current: 29/603.06
• CPC Class Codes: G11B 5/39 using magneto-resistive devices or effects
• CPC Class Codes: Y10T 29/4903 with bonding
• CPC Class Codes: Y10T 29/49041 with significant slider/housing shaping or treating
• CPC Class Codes: Y10T 29/49121 Beam lead frame or beam lead device

Abstract

A magnetic head using an MR element and a permanent magnet for applying a bias magnetic field to the MR element, and a lead frame of the head. A sheet of metal is punched or otherwise shaped in a predetermined pattern to produce the lead frame. The lead frame includes sections mounting the MR element and permanent magnet, lead connecting sections electrically connected to connecting sections of the MR element, and tape-contact sections which are flush with a tape-contact surface of the MR element. The lead frame mounted with the MR element and permanent magnet and provided with the lead connecting sections is placed in a metal mold having a predetermined configuration and buried and fixed in place in synthetic resin.

Claims

1. A method of producing a magnetic head which includes an MR element and a permanent magnet for applying a bias magnetic field to the MR element, comprising the steps of:

(a) providing a thin sheet of metal;

(b) shaping said sheet in a predetermined pattern to produce a lead frame having an MR element mount section for mounting said MR element, a magnet mount section for mounting said permanent magnet, lead connecting sections to be electrically connected to said MR element, and tape-contact sections with which a magnetic tape is to make contact;

(c) bending said tape-contact sections perpendicularly to a general plane of said lead frame;

(d) placing said MR element in said MR element mount section such that a tape-contact surface of said MR element is flush with said tape-contact sections of said lead frame;

(e) placing said permanent magnet in said magnet mount section;

(f) electrically connecting said lead connecting sections of said lead frame to connecting sections of said MR element;

(g) placing said frame in an assembled condition in a metal mold and pouring synthetic resin into said metal mold such that said tape-contact surface of said MR element and said tape-contact surfaces of said lead frame are exposed to the outside and end portions of said lead connecting sections of said lead frame extend to the outside, thereby embedding said lead frame in the synthetic resin; and

(h) finishing a molding of the synthetic resin to a predetermined contour of said magnetic head.

2. A method as claimed in claim 1, further comprising the step of (i) cutting needless portions of said lead frame.

3. A method as claimed in claim 2, further comprising the step of (j) grinding each of said contact surfaces.