JPH05205442A - Method for marking magnetic disk medium with quality information - Google Patents

Method for marking magnetic disk medium with quality information

Info

Publication number
JPH05205442A
JPH05205442A JP971892A JP971892A JPH05205442A JP H05205442 A JPH05205442 A JP H05205442A JP 971892 A JP971892 A JP 971892A JP 971892 A JP971892 A JP 971892A JP H05205442 A JPH05205442 A JP H05205442A
Authority
JP
Japan
Prior art keywords
quality information
magnetic disk
disk medium
magnetic
laser beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP971892A
Other languages
Japanese (ja)
Inventor
Yoshiki Ogawa
圭起 小川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP971892A priority Critical patent/JPH05205442A/en
Publication of JPH05205442A publication Critical patent/JPH05205442A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To make even a small-diameter and thin medium possible to be marked with quality information and to eliminate hear crush caused by sticking of scattered matters by collecting fused scattered matters to a duct by using air current when the innermost part of the magnetic part of a magnetic disk medium is marked with quality information by using laser beam. CONSTITUTION:When a magnetic disk medium 11 is marked with quality information, a collecting fan 25 is driven to blow an air current 22 having >=5m/sec wind velocity against a medium 11 inward through a duct main body 20A. In this state, laser beam 19 from a solid-state laser generator 18 is projected to an innermost part 17 of a magnetic part 14 to mark the part 17 with arcuate quality information 12. At this time, only the magnetic part 14 is fused with 0.4mum depth by the laser beam 19 to suppress fused scattered matters 21 cased by the laser beam 19 as much as possible. Scattered matters 21 generated by fusion are sucked between partitioning plates 25 of a duct 20 by the air current 22 and are discharged out through a pipe 20b of the duct main body 20A.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、磁気ディスク媒体の品
質情報の刻印方法に関する。近年、磁気ディスク装置
は、コンパクト化が進み、これに伴って磁気ディスク媒
体も小径、薄形化している。このため、外周端面への品
質情報の書き込みが難かしくなっている。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of marking quality information on a magnetic disk medium. In recent years, magnetic disk devices have become more compact, and along with this, magnetic disk media have also been made smaller in diameter and thinner. Therefore, it is difficult to write quality information on the outer peripheral end face.

【0002】小径、薄形の磁気ディスク媒体でも品質情
報を確実に書き込みする刻印方法の開発が要望されてい
る。
There is a demand for the development of a marking method for surely writing quality information even on a small-diameter thin magnetic disk medium.

【0003】[0003]

【従来の技術】従来の磁気ディスク媒体の品質情報の刻
印方法としては、図4に示すようなものがある。図4に
おいては、(1)は磁気ディスク媒体であり、磁気ディ
スク媒体(1)の外周端面(2)には、製造条件を示す
バーコード(3)を刻印する。
2. Description of the Related Art A conventional method of marking quality information on a magnetic disk medium is shown in FIG. In FIG. 4, (1) is a magnetic disk medium, and the outer peripheral end surface (2) of the magnetic disk medium (1) is marked with a bar code (3) indicating manufacturing conditions.

【0004】しかしながら、近年、磁気ディスク装置の
コンパクト化に伴い、磁気ディスク媒体(1)も小径
化、薄形化している。このため、磁気ディスク媒体
(1)の外周端面(2)へのバーコード(3)の書き込
みが難かしくなっている。このため、図5に示すよう
に、磁性部(4)の内径側のクランプエリア(5)に品
質情報(6)を手書きにより書き込みしていた。
However, in recent years, with the downsizing of magnetic disk devices, the magnetic disk medium (1) has been made smaller in diameter and thinner. Therefore, it is difficult to write the bar code (3) on the outer peripheral end surface (2) of the magnetic disk medium (1). Therefore, as shown in FIG. 5, the quality information (6) is manually written in the clamp area (5) on the inner diameter side of the magnetic portion (4).

【0005】なお、磁性部(4)のインナー側にレーザ
光で品質情報(6)を刻印する場合は、溶融飛散物が磁
気ディスク媒体(1)に付着し、組立後ヘッドクラッシ
ュを起こす。
When the quality information (6) is imprinted on the inner side of the magnetic part (4) with a laser beam, the melted scattered material adheres to the magnetic disk medium (1) and causes a head crash after assembly.

【0006】[0006]

【発明が解決しようとする課題】このような従来の磁気
ディスク媒体の品質情報の刻印方法にあっては、クラン
プエリアに品質情報を手書きにより書き込む場合には、
センサで品質情報を読み取ることができない、また、手
書きのため、書き間違いが発生する、また、クランプエ
リアからのはみ出しや汚染により品質が低下するという
問題があった。
In such a conventional method of marking quality information of a magnetic disk medium, when the quality information is written by hand in the clamp area,
There is a problem that the quality information cannot be read by the sensor, writing error occurs due to handwriting, and the quality deteriorates due to protrusion from the clamp area or contamination.

【0007】また、磁性部のインナー側にレーザ光で刻
印する場合には、溶融飛散物により組立後ヘッドクラッ
シュを起こすという問題があった。本発明は、このよう
な従来の問題点に鑑みてなされたものであって、品質情
報をセンサで読み取りすることができ、間違の発生がな
く、品質低下がなく、さらに組立後ヘッドクラッシュを
起こさない品質情報の刻印方法を提供することを目的と
している。
Further, when the inner side of the magnetic portion is marked with a laser beam, there is a problem that a head crush may occur after assembly due to a molten scattered material. The present invention has been made in view of such conventional problems, and the quality information can be read by a sensor, no error occurs, the quality does not deteriorate, and a head crash after assembling occurs. The purpose is to provide a method of marking quality information that does not occur.

【0008】[0008]

【課題を解決するための手段】前記、目的を達成するた
めに、本発明は、磁気ディスク媒体(11)の製造工程
で製造条件を表わす品質情報(12)を磁気ディスク媒
体(11)に刻印する刻印方法において、前記磁気ディ
スク媒体(11)の磁性部(14)の最インナー部(1
7)にレーザ光(19)を用いて、前記品質情報(1
2)を刻印し、この刻印時に前記磁気ディスク媒体(1
1)の内径中心方向に空気流(22)を形成し、溶融飛
散物(21)をダクト(20)により補集するようにし
たものである。
In order to achieve the above-mentioned object, the present invention engraves quality information (12) indicating manufacturing conditions on a magnetic disk medium (11) in a manufacturing process of the magnetic disk medium (11). In the engraving method, the innermost part (1) of the magnetic part (14) of the magnetic disk medium (11) is used.
Using the laser light (19) for 7), the quality information (1
2) is stamped, and the magnetic disk medium (1
The air flow (22) is formed in the inner diameter center direction of 1), and the molten scattered material (21) is collected by the duct (20).

【0009】[0009]

【作用】本発明においては、磁気ディスク媒体の磁性部
の最インナー部にレーザ光を用いて製造条件を表わす品
質情報を刻印する。したがって、磁気ディスク媒体が小
径、薄形のものであっても、品質情報を刻印することが
できる。
In the present invention, quality information indicating manufacturing conditions is marked on the innermost portion of the magnetic portion of the magnetic disk medium by using laser light. Therefore, even if the magnetic disk medium has a small diameter and a thin shape, the quality information can be imprinted.

【0010】この場合、レーザ光を用いて、磁性部を溶
融して品質情報をバーコードとして刻印するので、品質
情報をセンサで読み取ることができる。また、手書きで
品質情報を書き込むときに生じるような書き間違いを防
止することができ、品質の低下もない。さらに、磁気デ
ィスク媒体の内径中心方向に空気流を形成して、溶融飛
散物をダクトにより補集するので、溶融飛散物が磁気デ
ィスク媒体に付着することがなく、組立後のヘッドクラ
ッシュの発生を防止することができる。
In this case, since the quality information is marked as a bar code by melting the magnetic portion using laser light, the quality information can be read by the sensor. In addition, it is possible to prevent erroneous writing that occurs when writing quality information by handwriting, and there is no deterioration in quality. Furthermore, since an air flow is formed in the direction of the inner diameter center of the magnetic disk medium and the molten scattered material is collected by the duct, the molten scattered material does not adhere to the magnetic disk medium, and head crushing after assembly does not occur. Can be prevented.

【0011】[0011]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。図1〜図3は、本発明の実施例を示す図である。
図1において、(11)は磁気ディスク媒体であり、こ
の磁気ディスク媒体(11)には、製造工程において、
製造条件を表わす品質情報(12)が刻印される。
Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing an embodiment of the present invention.
In FIG. 1, (11) is a magnetic disk medium, and this magnetic disk medium (11) has
Quality information (12) representing the manufacturing conditions is stamped.

【0012】磁気ディスク媒体(11)は、例えば8イ
ンチ系のもので、小径化、薄形化されているため、その
外周端面には品質情報(12)を刻印することができな
い。磁気ディスク媒体(11)の基板(13)はアルミ
ニウムで形成され、基板(13)の両面には、磁性部
(14)が形成されている。磁性部(14)よりインナ
ー側であって、開口部(15)の外側にはクランプエリ
ア16が設けられ、クランプエリア16は、アルミニウ
ムの基板(13)が露出した領域である。磁性部(1
4)の最インナー部(17)を製造条件を表わす品質情
報(12)を刻印する刻印エリアとする。
The magnetic disk medium (11) is, for example, of an 8-inch type and has a small diameter and a thin shape, so that the quality information (12) cannot be imprinted on the outer peripheral end surface thereof. The substrate (13) of the magnetic disk medium (11) is made of aluminum, and the magnetic portions (14) are formed on both surfaces of the substrate (13). A clamp area 16 is provided on the inner side of the magnetic portion (14) and outside the opening (15), and the clamp area 16 is an area where the aluminum substrate (13) is exposed. Magnetic part (1
The innermost part (17) of 4) is used as a marking area for marking quality information (12) representing manufacturing conditions.

【0013】(18)はレーザ光(19)を発光する固
体レーザ発生装置であり、固体レーザ発生装置(18)
はレーザ光(19)により磁性部(14)を溶融してバ
ーコードの品質情報(12)を刻印する。レーザ光(1
9)の強さは、磁性体(14)だけを溶融するように制
御する。(20)はダクトであり、ダクト(20)は、
レーザ光(19)により、磁性部(14)を溶融したと
き発生する溶融飛散物(21)を磁気ディスク媒体(1
1)の内径中心方向に空気流(22)を形成して補集
し、磁気ディスク媒体(11)の汚染を防止する。
Reference numeral (18) is a solid-state laser generator which emits a laser beam (19).
Melts the magnetic part (14) with the laser beam (19) and stamps the bar code quality information (12). Laser light (1
The strength of 9) is controlled so that only the magnetic substance (14) is melted. (20) is a duct, and the duct (20) is
The molten scattered material (21) generated when the magnetic portion (14) is melted by the laser light (19) is transferred to the magnetic disk medium (1).
The air flow (22) is formed and collected in the direction of the inner diameter center of 1) to prevent the magnetic disk medium (11) from being contaminated.

【0014】ダクト(20)は、ダクト本体(20A)
と、ダクト本体(20A)に接続されたパイプ(20
B)により形成されている。ダクト本体(20A)は、
半円形状の2枚の板部材(23)(24)の間に放射方
向に、仕切板(25)を設けたものであり、仕切板(2
5)の間に風速5m/sec以上での空気流(22)
で、溶融飛散物(21)を吸引する。パイプ(20B)
には、補集ファン(26)が接続され、補集ファン(2
6)により前記空気流(22)を形成する。
The duct (20) is the duct body (20A).
And a pipe (20 connected to the duct body (20A)
B). The duct body (20A) is
A partition plate (25) is provided between two semicircular plate members (23) and (24) in the radial direction.
Air flow with wind velocity of 5 m / sec or more during 5) (22)
Then, the molten scattered material (21) is sucked. Pipe (20B)
A collection fan (26) is connected to the collection fan (2).
6) forms said air stream (22).

【0015】次に、品質情報(12)の刻印方法を説明
する。補集ファン(26)を駆動することにより、ダク
ト(20)を用いて、風速5m/sec以上の空気流
(22)を磁気ディスク媒体(11)の内径方向に形成
しながら、磁性部(14)の最インナー部(17)に固
体レーザ発生装置(18)からレーザ光(19)を発射
して、円弧状の品質情報(12)を刻印する。
Next, a method of marking the quality information (12) will be described. By driving the collecting fan (26), an air flow (22) having a wind speed of 5 m / sec or more is formed in the inner diameter direction of the magnetic disk medium (11) using the duct (20), while the magnetic portion (14) is being formed. The laser light (19) is emitted from the solid-state laser generator (18) to the innermost part (17) of (1) to mark the arc-shaped quality information (12).

【0016】この場合、レーザ光(19)により、磁性
部(14)のみを0.4μmの深さで溶融させ、レーザ
光(19)による溶融飛散物(21)をできるだけ抑制
するようにするが、磁性部(14)の溶融により発生し
た溶融飛散物(21)は、ダクト(20)の仕切板(2
5)の間に、空気流(22)により吸引される。溶融飛
散物(21)は、ダクト(20)のパイプ(20B)を
通って外部に排出され、磁気ディスク媒体(11)の媒
体面の汚染を防止する。
In this case, the laser beam (19) melts only the magnetic portion (14) to a depth of 0.4 μm so that the molten scattered material (21) caused by the laser beam (19) is suppressed as much as possible. The molten scattered material (21) generated by the melting of the magnetic part (14) is the partition plate (2) of the duct (20).
During 5), it is sucked by the air stream (22). The molten scattered material (21) is discharged to the outside through the pipe (20B) of the duct (20) and prevents contamination of the medium surface of the magnetic disk medium (11).

【0017】こうして刻印された刻印部の断面を図2に
示す。図2において、アルミニウムの基板(13)上に
形成された磁性部(14)には、レーザ光(19)によ
る溶融部(27)が形成され、この溶融部(27)はバ
ーコードの幅Aを示す。なお、深さは磁性部(14)の
厚みと同じの0.4μmである。
A cross section of the marking portion thus marked is shown in FIG. In FIG. 2, a melting portion (27) formed by a laser beam (19) is formed on a magnetic portion (14) formed on an aluminum substrate (13), and this melting portion (27) has a bar code width A. Indicates. The depth is 0.4 μm, which is the same as the thickness of the magnetic part (14).

【0018】次に、刻印した状態を図3に示す。品質情
報(12)は、図3に示すように、磁性部(14)の最
インナー部(17)に円弧状に形成される。このよう
に、小径、薄形の磁気ディスク媒体(11)にも品質情
報(12)を刻印することができる。この場合、バーコ
ードで品質情報(12)を刻印するので、センサで読み
取ることができ、また、手書きのときのような間違いも
防止することができ、また、はみ出し、汚染を防止する
ことができるので、品質が低下することがない。
Next, the engraved state is shown in FIG. The quality information (12) is formed in an arc shape on the innermost part (17) of the magnetic part (14) as shown in FIG. Thus, the quality information (12) can be imprinted on the small-diameter thin magnetic disk medium (11). In this case, since the quality information (12) is imprinted by the bar code, it can be read by the sensor, and it is possible to prevent a mistake such as handwriting, and to prevent the protrusion and the contamination. Therefore, the quality does not deteriorate.

【0019】さらに、溶融飛散物(21)が磁気ディス
ク媒体(11)に付着することがないので、組立後のヘ
ッドクラッシュの発生を防止することができる。
Further, since the molten scattered material (21) does not adhere to the magnetic disk medium (11), it is possible to prevent the occurrence of head crash after assembly.

【0020】[0020]

【発明の効果】以上説明してきたように、本発明によれ
ば、刻印した品質情報は読み取り可能で、書き間違いを
防止することができ、また、汚染を防止することができ
るので、品質が低下することがなく、さらに、組立後の
ヘッドクラッシュの発生を防止することができる。
As described above, according to the present invention, the imprinted quality information can be read, erroneous writing can be prevented, and contamination can be prevented. Further, it is possible to prevent the occurrence of head crash after assembly.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す斜視図FIG. 1 is a perspective view showing an embodiment of the present invention.

【図2】刻印部の断面図FIG. 2 is a sectional view of an engraved portion.

【図3】刻印部の表面を示す図FIG. 3 is a view showing a surface of a marking portion.

【図4】従来例を示す図FIG. 4 is a diagram showing a conventional example.

【図5】他の従来例を示す図FIG. 5 is a diagram showing another conventional example.

【符号の説明】[Explanation of symbols]

11……磁気ディスク媒体 12……品質情報 13……基板 14……磁性部 15……開口部 16……クランプエリア 17……最インナー部 18……固体レーザ発生装置 19……レーザ光 20……ダクト 20A…ダクト本体 20B…パイプ 21……溶融飛散物 22……空気流 23、24……板部材 25……仕切板 26……補集ファン 27……溶融部 11 ... Magnetic disk medium 12 ... Quality information 13 ... Substrate 14 ... Magnetic part 15 ... Aperture 16 ... Clamp area 17 ... Innermost part 18 ... Solid-state laser generator 19 ... Laser light 20 ... ... Duct 20A ... Duct body 20B ... Pipe 21 ... Molten scattered matter 22 ... Air flow 23, 24 ... Plate member 25 ... Partition plate 26 ... Collection fan 27 ... Melting part

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】磁気ディスク媒体(11)の製造工程で製
造条件を表わす品質情報(12)を磁気ディスク媒体
(11)に刻印する刻印方法において、 前記磁気ディスク媒体(11)の磁性部(14)の最イ
ンナー部(17)にレーザ光(19)を用いて、前記品
質情報(12)を刻印し、この刻印時に前記磁気ディス
ク媒体(11)の内径中心方向に空気流(22)を形成
し、溶融飛散物(21)をダクト(20)により補集す
ることを特徴とする磁気ディスク媒体の品質情報の刻印
方法。
1. A marking method for marking quality information (12) representing a manufacturing condition on a magnetic disk medium (11) in a manufacturing process of the magnetic disk medium (11), comprising a magnetic part (14) of the magnetic disk medium (11). ), The laser beam (19) is used to mark the quality information (12) on the innermost part (17), and at the time of this marking, an air flow (22) is formed in the inner diameter center direction of the magnetic disk medium (11). A method of marking quality information of a magnetic disk medium, characterized in that the molten scattered material (21) is collected by the duct (20).
JP971892A 1992-01-23 1992-01-23 Method for marking magnetic disk medium with quality information Pending JPH05205442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP971892A JPH05205442A (en) 1992-01-23 1992-01-23 Method for marking magnetic disk medium with quality information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP971892A JPH05205442A (en) 1992-01-23 1992-01-23 Method for marking magnetic disk medium with quality information

Publications (1)

Publication Number Publication Date
JPH05205442A true JPH05205442A (en) 1993-08-13

Family

ID=11728068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP971892A Pending JPH05205442A (en) 1992-01-23 1992-01-23 Method for marking magnetic disk medium with quality information

Country Status (1)

Country Link
JP (1) JPH05205442A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG91280A1 (en) * 1999-05-25 2002-09-17 Komag Inc Method of marking disks
US8510931B2 (en) 2001-04-24 2013-08-20 Seagate Technology Llc Method to reduce servo pattern runout on a prewritten disc

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62161526A (en) * 1986-01-11 1987-07-17 Tohoku Metal Ind Ltd Process of ultrasonic clam seal
JPS63148481A (en) * 1986-12-10 1988-06-21 Fujitsu Ltd Cleaning device for magnetic disk surface
JPH02173994A (en) * 1988-12-27 1990-07-05 Fujitsu Ltd Disk managing method for magnetic disk device and bar code reader used in this method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62161526A (en) * 1986-01-11 1987-07-17 Tohoku Metal Ind Ltd Process of ultrasonic clam seal
JPS63148481A (en) * 1986-12-10 1988-06-21 Fujitsu Ltd Cleaning device for magnetic disk surface
JPH02173994A (en) * 1988-12-27 1990-07-05 Fujitsu Ltd Disk managing method for magnetic disk device and bar code reader used in this method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG91280A1 (en) * 1999-05-25 2002-09-17 Komag Inc Method of marking disks
US8510931B2 (en) 2001-04-24 2013-08-20 Seagate Technology Llc Method to reduce servo pattern runout on a prewritten disc

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