JPH0287309A - Magnetic head - Google Patents

Abstract

PURPOSE:To attain correct write and read of a signal by forming a glass indicating an upper limit and a lower limit of a gap of a core to a sliding face side of a read write core in terms of standards. CONSTITUTION:A groove of a read write gap lower limit 3 and a gap upper limit 4 is made to a read write core 1 and glasses 8, 9 are injected to the groove. After the assembly of the read write core 1, the both side of it are covered by erase cores 2a, 2b, a slider 6 and a plate 7. Thus, in the case of aligning the gap depth of the read write core, while the glasses 8, 9 of the read write core 1 are confirmed, the flat part of the core is ground till the gap upper limit glass 8 is lost and the gap upper limit glass 9 is left, and at the same time the grinding is stopped. Therefor, all the gap 10 is brought into the allowable range 5 in the standards. Thus, the signal read/write is kept constant.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a magnetic head for a magnetic disk device.

[Conventional technology]

A conventional magnetic head for a flexible disk device has a third
As shown in the figure, a read/write core 1, erase cores 2a and 2b arranged on both sides of the core 1,
It consists of a slider 6 and a plate 7 that hold both cores 2a and 2b.

Since the gap depth of the read/write core 1 greatly affects the writing/reading of the magnetic head, it is necessary to polish the flat surface of the core to finish the gap depth to a certain size and tolerance.

The read/write core 1 is covered on both sides by the erase cores 2a and 2b, and the dimensions of the gap depth 10 of the read/write core cannot be measured with the slider assembly completed. Gap depths are produced by determining the polishing dimensions using a single gap depth and polishing the flat surface of the core.

[Problem to be solved by the invention]

However, in the above method, errors occur in the gap depth of the read/write core after assembly and plane lapping due to variations in the assembly accuracy of the slider assembly, variations in the slider as a reference for the slider assembly, and variations in the precision of individual cores. As a result, signals may not be written or read correctly, which significantly reduces the reliability of the entire head.

[Means to solve the problem]

According to the present invention, in a read/write core in which ceramic and ferrite are integrally bonded, glass is formed on the sliding surface side of the read/write core to indicate the upper and lower limits of the standard gap depth of the core. A magnetic head with characteristics can be obtained.

〔Example〕

Next, the present invention will be described in more detail with reference to the drawings showing one embodiment of the present invention.

Referring to FIG. 1, in a single read/write core according to an embodiment of the present invention, grooves are formed at the read/write core gap depth lower limit 3 and gap depth upper limit 4, and glasses 8 and 9 are injected, respectively. has been done.

In FIG. 2, the read/write core includes erase cores 2a and 2b, slider 6, and plate 7 on the rear side of assembly.
covered by. Therefore, in order to remove the gap depth of the read/write core, check the glasses 8 and 9 of the read/write core 1 and polish the flat part of the core until the gap depth upper limit glass 8 is removed and the gap depth is removed. By stopping polishing when the depth upper limit glass 9 remains, the core is polished in the assembled state, so it is not affected by errors during assembly, and all gap depths 10 meet the standard. The tolerance range is 5.

〔Effect of the invention〕

As explained above, according to the present invention, since a glass is provided that indicates the allowable range of the gap depth of the core, the gap depth can be finished to a predetermined dimension without being affected by errors during slider assembly. This allows writing/reading of the manufactured magnetic head to be held constant.

[Brief explanation of drawings]

FIG. 1 is a plan view of a read/write core according to an embodiment of the present invention, FIG. 2 is a perspective view of the slider assembly after the gap is removed, and FIG. 3 is a perspective view of the slider assembly after the cap is removed in a conventional example. . 1... Read/write core, 2a, 2b... Erase core, 3... Read/write core gap depth standard lower limit, 4... Read/write core gap depth standard upper limit, 5... Read/write core gap depth standard allowable range, 6...Slider-7...Plate, 8...Read/write core gap depth standard upper limit glass, 9...Read/write core gap depths Lower limit of standard glass, 10...read/write core gap depths. Man's agent, patent attorney Shindai Uchihara? Wa

Claims (1)

[Claims] A magnetic head characterized in that a read/write core is formed by integrally bonding ceramic and ferrite, and glass is formed on the sliding surface side of the read/write core to indicate the upper and lower limits of the gap dips of the core.