KR0128721B1 - Laminated magnetic head and the manufacturing method - Google Patents
Laminated magnetic head and the manufacturing methodInfo
- Publication number
- KR0128721B1 KR0128721B1 KR1019940009932A KR19940009932A KR0128721B1 KR 0128721 B1 KR0128721 B1 KR 0128721B1 KR 1019940009932 A KR1019940009932 A KR 1019940009932A KR 19940009932 A KR19940009932 A KR 19940009932A KR 0128721 B1 KR0128721 B1 KR 0128721B1
- Authority
- KR
- South Korea
- Prior art keywords
- magnetic
- head
- bonding
- thin film
- magnetic head
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of layers
- G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
Abstract
Description
본 발명은 적층형 자기헤드에 관한 것으로, 특히 자기헤드의 자성층 폭을 두껍게하여 재생효율 및 자속량을 대폭적으로 증가시킬 수 있는 적층형 자기헤드 및 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked magnetic head, and more particularly, to a stacked magnetic head and a manufacturing method which can significantly increase the regeneration efficiency and the magnetic flux by increasing the magnetic layer width of the magnetic head.
일반적으로 VTR이 고성능, 고화질, 고기능화를 추구함에 따라 자기기록에 관건이 되는 자성미디어와 자기헤드도 많은 발전을 하게 되었다.In general, as the VTR pursues high performance, high quality, and high functionality, the magnetic media and the magnetic head, which are key to magnetic recording, have also been developed.
1기존의타입, 특히 VHS에서는 산화물 테이프와 페라이트헤드가 대부분이였으나 고화질을 위해 같은 부피의 테이프에 더많은 정보를 넣기 위해서는 테이프의 보자력을 올리는 것이 필요하게 되었고, 이에 따른 헤드도 보자력(BS) 값을 높여가는 것이 필요하게 되었다.1 conventional Types, especially VHS, were mostly oxide tapes and ferrite heads, but it was necessary to increase the coercive force of the tape in order to put more information into the same volume of tape for high quality, and to increase the coercive force (BS) value of the head. It became necessary.
예를들어 S-VHS가 그러한 것인데, 일반적인 VHS에서 테이프의 보자력이 690 에르스탯(Oe)인 반면, S-VHS는 900에르스탯으로 보자력이 상승했고 헤드도 일반 페라이트에서 고급페라이트나 또는 MIG타입으로 바뀌게 되었다.For example, S-VHS is such that the coercivity of the tape in the typical VHS is 690 erstats (Oe), while the S-VHS has a coercive force of 900 erstats, and the head is also changed from general ferrite to high-grade ferrite or MIG Changed.
또한, 8mm 타입의 VTR에서는 휴대용 캠코더를 지향했기 때문에 소형화가 요구되었고 같은 정보를 작은 면적에 집어넣기 위해서는 고밀도 기록이 필요한데, 이를 위해서는 보자력이 1400 에르스탯인 메탈 테이프를 써야만 했고, 또 이 메탈 테이프를 충분히 기록재생하기 위해서 페라이트로는 불가능하여 MIG타입이나 적층헤드가 필요하게 되었다.In addition, 8mm type VTRs were aimed at portable camcorders, which required miniaturization, and high density recording was required to fit the same information into a small area. In order to sufficiently record and reproduce, ferrite is impossible, and thus a MIG type or a stacking head is required.
상기와 같이 작용하는 종래의 적층형 자기헤드에 대해 도 1을 참조하면서 설명하기로 한다.A conventional stacked magnetic head acting as described above will be described with reference to FIG. 1.
도1은 종래의 적층형 자기헤드를 나타내는 사시도이다. 도1에 도시된 바와 같이, 종래의 적층형 자기헤드는 비자성기판(10)에 테이프 주행방향에 평행하게 금속자성박막(20)을 성막하되, 금속자성박막(20)과 비자성층(30)을 교대로 성막하게되며, 금속자성박막(20)은 두껍게 비자성층(30)은 얇게 한다.1 is a perspective view showing a conventional stacked magnetic head. As shown in FIG. 1, the conventional multilayer magnetic head forms a metal magnetic thin film 20 on a nonmagnetic substrate 10 in parallel with a tape traveling direction, and forms a metal magnetic thin film 20 and a nonmagnetic layer 30. The film is alternately formed, and the metal magnetic thin film 20 is thick and the nonmagnetic layer 30 is thin.
그러나 금속자성박막(20)이 두꺼워지면 고주파에서 맴돌이 전류손실이 급격하게 커져 자성물질 본래의 성질이 크게 떨어지기 때문에 이를 방지하기 위해서는 금속자성박막(20)을 될수록 얇게 할 필요가 있다.However, when the metal magnetic thin film 20 is thick, the eddy current loss is sharply increased at high frequency, so that the original property of the magnetic material is greatly reduced. Therefore, the metal magnetic thin film 20 needs to be thinner as much as possible.
따라서, 수[㎛] 정도의 폭이 필요하므로 도1에 도시된 바와 같이 헤드의 트랙폭(TW)에 해당하는 만큼 복수의 층으로 상기 금속자성박막(20)을 적층하여 만들게 된다.Therefore, since the width of the order of several [μm] is required, as shown in FIG. 1, the magnetic metal thin film 20 is formed by stacking a plurality of layers as much as the track width TW of the head.
또한, 자기저항 Rm=이므로 재생효율은 헤드의 폭부분이 두꺼울수록, 전체크기가 작을수록 효율이 좋다.In addition, the magnetoresistance Rm = Therefore, the regeneration efficiency is better the thicker the head width portion, the smaller the overall size.
그러나, 종래의 페라이트헤드나 MIG는 자성층 폭/트랙폭의 비율이 5 : 1∼10 : 1정도인데 비해서 적층형 자기헤드는 도3에서 보는 바와 같이 자성층만 비교하여 볼때 자성층 폭(CW)/트랙폭(TW)의 비율이 1 : 1인 것을 알 수 있다.However, in the conventional ferrite head or MIG, the ratio of the magnetic layer width / track width is about 5: 1 to 10: 1, whereas the laminated magnetic head has a magnetic layer width (CW) / track width as compared to the magnetic layer as shown in FIG. It can be seen that the ratio of (TW) is 1: 1.
따라서, 헤드의 폭만 비교한다면 적층형 자기헤드는 기존의 페라이트 헤드나 MIG헤드의 1/5∼1/10정도에 불과하고 자기저항도 그만큼 커서 재생효율이 상대적으로 저하됨을 알 수 있다.Therefore, if only the head width is compared, the stacked magnetic head is only about 1/5 to 1/10 of the conventional ferrite head or MIG head, and the magnetoresistance is also so large that the regeneration efficiency is relatively low.
본 발명은 상기의 제반 문제점을 감안하여 안출된 것으로, 그 목적으로 하는 바는 종래의 적층형 자기헤드가 기존의 페라이트헤드나 MIG헤드에 비해 고주파특성이 우수함에도 불구하고 트랙폭에 의한 자성층 폭이 제한되기 때문에 재생효율과 자속발생량이 적은점을 보완할 수 있는 적층형 자기헤드를 제공하는 것을 목적으로 한다.The present invention has been made in view of the above problems, and its purpose is to limit the magnetic layer width due to the track width, although the conventional laminated magnetic head has excellent high frequency characteristics compared to the conventional ferrite head or MIG head. Therefore, it is an object of the present invention to provide a stacked magnetic head which can compensate for the low regeneration efficiency and the low magnetic flux generation amount.
도1은 종래의 적층형 자기헤드를 나타내는 사시도.1 is a perspective view showing a conventional stacked magnetic head.
도2a는 본 발명에 의한 적층형 자기헤드의 제조과정을 나타내는 조립도.Figure 2a is an assembly diagram showing the manufacturing process of the stacked magnetic head according to the present invention.
도2b는 본 발명에 의한 적층형 자기헤드를 나타내는 사시도.Fig. 2B is a perspective view showing a stacked magnetic head according to the present invention.
도2c는 본 발명에 의한 적층형 자기헤드를 나타내는 측면도.Figure 2c is a side view showing a stacked magnetic head according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
10 : 비자성기판, 20 : 금속자성박막,10: nonmagnetic substrate, 20: magnetic metal thin film,
30 : 비자성층, 40 : 접촉부,30: nonmagnetic layer, 40: contact portion,
50 : 글래스, TW : 트랙폭,50: glass, TW: track width,
CW : 자성층 폭CW: magnetic layer width
상기의 목적을 달성하기 위한 본 발명에 따른 적층형 자기헤드는 적어도 자성을 형성하는 금속박막과 비자성체의 적층으로 되는 금속박막층과, 상기 금속박막층을 양단에서 지지하는 비자성체기판을 포함하여 이루어지는 적층헤드로서, 상기 금속박막층은, 외부로 판독되는 자성을 갖는 트랙폭이 전체적으로 형성되는 자성층 폭보다 작게 이루어진다.Laminated magnetic head according to the present invention for achieving the above object is a laminated head comprising a metal thin film layer which is a laminate of at least a magnetic metal film and a non-magnetic material to form a magnetic, and a non-magnetic substrate for supporting the metal thin film layer at both ends As the metal thin film layer, the track width having the magnetically read out is made smaller than the magnetic layer width formed as a whole.
이하, 첨부된 도면을 참조하여 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도2a는 본 발명에 의한 적층형 자기헤드의 제조과정을 나타내는 조립도이며, 도2b는 본 발명에 의한 적층형 자기헤드를 나타내는 사시도이고, 도2c는 본 발명에 의한 적층형 자기헤드를 나타내는 측면도이다.FIG. 2A is an assembly view showing a manufacturing process of the stacked magnetic head according to the present invention, FIG. 2B is a perspective view showing the stacked magnetic head according to the present invention, and FIG. 2C is a side view showing the stacked magnetic head according to the present invention.
그리고, 도2a 내지 도2b에 도시된 바와 같이 본 발명에 따른 적층형 자기헤드는 양측의 비자성기판(10) 사이에 트랙폭(TW) 이상으로 금속자성박막(20)이 적층된 구조로 이루어진다.As shown in FIGS. 2A and 2B, the multilayer magnetic head according to the present invention has a structure in which the metal magnetic thin film 20 is stacked over the track width TW between the nonmagnetic substrates 10 on both sides.
또한, 도2a 내지 도2c에 도시된 바와 같이, 본 발명에 따른 적층형 자기헤드의 제조방법은 먼저, 비자성기판상에 트랙폭 이상으로 금속자성막을 적층하는 단계와, 상기와 같이 적층된 금속자성막위에 본딩용 글래스를 성막하고, 다시 비자성기판을 붙인 뒤 본딩시키는 제1본딩단계와, 상기 제1본딩단계후 헤드의 접촉부에 절연막을 입힌뒤 I Bar, C Bar를 다시 글래스로 본딩시키는 제2본딩단계와, 상기 제2본딩단계 이후 트랙폭 만큼 절삭해내는 단계를 거쳐 적층형 자기헤드가 완성된다.In addition, as shown in Figures 2a to 2c, the manufacturing method of the stacked magnetic head according to the present invention, first, laminating a metal magnetic film over a track width on a non-magnetic substrate, and the metal magnetic film laminated as described above A first bonding step of forming a bonding glass on the substrate, and then attaching and bonding the non-magnetic substrate, and a second bonding step of bonding I bar and C bar to glass after applying an insulating film to the contact portion of the head after the first bonding step. The laminated magnetic head is completed through the bonding step and the cutting of the track width after the second bonding step.
이때, 종래의 적층헤드를 나타내는 도1과 본 발명에 의한 적층헤드를 나타내는 도2b를 비교하여보면, 상기와 같은 단계로 완성된 본 발명에 의한 적층형 자기헤드는 요절하단부의 자성층 폭(CW)이 종래의 것에 비해 훨씬 두꺼워지기 때문에 자속량이 대폭적으로 증가됨을 알 수 있다.At this time, when comparing Fig. 1 showing a conventional stacking head and Fig. 2b showing a stacking head according to the present invention, the stacked magnetic head according to the present invention completed as described above has a magnetic layer width CW of the lower end. It can be seen that the magnetic flux is greatly increased because it is much thicker than the conventional one.
이상에서와 같은 본 발명에 따른 적층형 자기헤드에 의하면 트랙폭에 비하여 자성층 폭이 증대되기 때문에 재생효율이 높아지게 되는 효과가 있다.According to the stacked magnetic head according to the present invention as described above, the magnetic layer width is increased compared to the track width, so that the regeneration efficiency is increased.
또한, 상기와 같이 자성층 폭이 증대됨으로 인하여 자속량이 대폭적으로 증가되기 때문에 고주파대응에 전혀 문제가 없어 HDTV용 D-VCR 헤드에도 응용할 수 있는 탁월한 효과가 있다.In addition, since the magnetic flux is greatly increased due to the increase in the magnetic layer width as described above, there is no problem in high frequency response, and thus there is an excellent effect applicable to the D-VCR head for HDTV.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940009932A KR0128721B1 (en) | 1994-05-06 | 1994-05-06 | Laminated magnetic head and the manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940009932A KR0128721B1 (en) | 1994-05-06 | 1994-05-06 | Laminated magnetic head and the manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950034082A KR950034082A (en) | 1995-12-26 |
| KR0128721B1 true KR0128721B1 (en) | 1998-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940009932A KR0128721B1 (en) | 1994-05-06 | 1994-05-06 | Laminated magnetic head and the manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0128721B1 (en) |
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1994
- 1994-05-06 KR KR1019940009932A patent/KR0128721B1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR950034082A (en) | 1995-12-26 |
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