JPH071590B2 - Method of manufacturing magnetic head device - Google Patents
Method of manufacturing magnetic head deviceInfo
- Publication number
- JPH071590B2 JPH071590B2 JP10353386A JP10353386A JPH071590B2 JP H071590 B2 JPH071590 B2 JP H071590B2 JP 10353386 A JP10353386 A JP 10353386A JP 10353386 A JP10353386 A JP 10353386A JP H071590 B2 JPH071590 B2 JP H071590B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- mounting plate
- notch
- head device
- magnetic
- 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.)
- Expired - Fee Related
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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
Landscapes
- Supporting Of Heads In Record-Carrier Devices (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、フロッピーディスク駆動装置に搭載される磁
気ヘッド装置の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a magnetic head device mounted in a floppy disk drive device.
本発明は、切欠きを設けることにより変形自在となした
取付板に磁気コア部とスライダ部とからなる磁気ヘッド
部を固定するに際し、 上記取付板の切欠きに連結補強部を残存した状態で上記
磁気ヘッド部を取付け、その後、上記連結補強部を切断
することにより、 磁気ヘッド装置の組立て工程における取付板の変形不良
を解消するものである。According to the present invention, when fixing a magnetic head portion composed of a magnetic core portion and a slider portion to a mounting plate that is deformable by providing a notch, a connecting reinforcing portion remains in the notch of the mounting plate. By attaching the magnetic head portion and then cutting the connecting reinforcing portion, the deformation of the attaching plate in the assembling process of the magnetic head device is eliminated.
フロッピーディスク等の円盤状の磁気ディスクは、取り
扱いが比較的簡単で、しかも大容量の信号が記録できる
ことから、各種コンピュータ,ワードプロセッサ等の外
部記憶装置として使用範囲が拡大されつつある。A disk-shaped magnetic disk such as a floppy disk is relatively easy to handle and is capable of recording a large-capacity signal, so that its range of use is expanding as an external storage device such as various computers and word processors.
上記フロッピーディスクは当初片面記録であったが、近
年ではこの駆動装置のシステムの高性能化に対応してデ
ィスクの両面に記録を行い記億容量の倍増を図った両面
記録が主流となっている。The above-mentioned floppy disk was initially single-sided recording, but in recent years, double-sided recording, which doubles the storage capacity by recording on both sides of the disk in response to the higher performance of this drive system, has become the mainstream. .
従来、この両面記録に使用されるディスク駆動装置に搭
載される磁気ヘッド装置は、第5図に示すように、フロ
ッピーディスク駆動装置本体のガイドバー(図示せず)
に固定されるキャリッジ部(101)と、このキャリッジ
部(101)に第4図中A方向に回動自在に固定される可
動アーム部(102)を有し、これらキャリッジ部(101)
及び可動アーム部(102)に固定された磁気ヘッド部(1
03),(104)によってフロッピーディスク(105)の両
面に対して記録・再生を行うように構成されている。す
なわち、上記可動アーム部(102)に取付けられる磁気
ヘッド(104)は引張バネ(108)によりキャリッジ部
(101)方向に引き付けられ、各磁気ヘッド(103),
(104)間に所定ヘッド圧でディスク(105)が挟み付け
られている。また、上記回動アーム部(102)に取付け
られる磁気ヘッド部(104)は、センターピボットと称
される突起部(102a)を介して圧力バネにより加圧され
たディスク(105)をフォローしている。Conventionally, as shown in FIG. 5, a magnetic head device mounted on a disk drive device used for double-sided recording has a guide bar (not shown) of a floppy disk drive device body.
A carriage part (101) fixed to the carriage part (101) and a movable arm part (102) fixed to the carriage part (101) so as to be rotatable in the direction A in FIG.
And a magnetic head part (1) fixed to the movable arm part (102).
03) and (104) are configured to record / reproduce on both sides of the floppy disk (105). That is, the magnetic head (104) attached to the movable arm section (102) is attracted toward the carriage section (101) by the tension spring (108), and each magnetic head (103),
A disc (105) is sandwiched between the (104) with a predetermined head pressure. The magnetic head portion (104) attached to the rotating arm portion (102) follows the disc (105) pressed by a pressure spring via a protrusion (102a) called a center pivot. There is.
ここで、上記回動アーム部(102)に取付けられる取付
板(107)には、第6図に示すように、一対の略コ字状
の切欠き部(110),(111)及び(112),(113)がそ
れぞれ対向する如く切欠かれ、これら切欠き部(11
0),(111)間及び(112),(113)間には連結部(11
4),(115)及び(116),(117)を残存させたものが
使用されている。このため、取付板(107)に固定され
た磁気ヘッド部(103)は、ヘッド圧に無関係にディス
ク(105)の周方向(第6図中X方向)及び径方向(第
6図中Y方向)に可動となり、また上記センターピボッ
ト(102a)を介してディスク(105)の厚み方向(第6
図中Z方向)に可動となる。Here, as shown in FIG. 6, a pair of substantially U-shaped notches (110), (111) and (112) are attached to the attachment plate (107) attached to the rotating arm portion (102). ), (113) are notched so that they face each other, and these notches (11
A connecting part (11) is provided between (0) and (111) and between (112) and (113).
4), (115), (116), and (117) left are used. Therefore, the magnetic head portion (103) fixed to the mounting plate (107) has a circumferential direction (X direction in FIG. 6) and a radial direction (Y direction in FIG. 6) of the disk (105) regardless of head pressure. ), And through the center pivot (102a) through the center of the disk (105) in the thickness direction (6th
It becomes movable in the Z direction in the figure).
したがって、上記磁気ヘッド部(103),(104)はディ
スク(105)の回転により生じるうねりに対して良好な
追従性を示し、ディスク(105)に常に摺接した状態に
保持される。しかも、ヘッド圧を数g程度と低く設定で
きるので、磁気ヘッド部及びフロッピーディスクの寿命
も長くなる。Therefore, the magnetic head portions (103) and (104) exhibit a good followability to the undulation generated by the rotation of the disk (105), and are held in a state of always being in sliding contact with the disk (105). Moreover, since the head pressure can be set as low as several g, the life of the magnetic head and the floppy disk is extended.
ところで、上記取付板(107)はその板厚が0.05mm程度
と極めて薄く、非常に脆弱で機械的強度に劣るものであ
り、逆に、それがためにZ方向にも柔軟に可動しディス
ク(105)に対する摺接を確保しているという相反する
性質を有している。なお、キャリッジ部(101)側の取
付板(106)は、その板厚が0.15mm程度と厚く設定され
ているので、機械的強度はある程度確保されている。By the way, the mounting plate (107) has a very thin plate thickness of about 0.05 mm and is very fragile and inferior in mechanical strength. It has the contradictory property of ensuring sliding contact with 105). The mounting plate (106) on the carriage section (101) side has a large plate thickness of about 0.15 mm, so that mechanical strength is secured to some extent.
このように回動アーム部(102)側の取付板(107)が脆
弱なことに起因し種々の問題が生じる。As described above, various problems occur due to the attachment plate (107) on the side of the rotating arm (102) being weak.
すなわち、磁気ヘッド装置の組立て工程において、取付
板(107)に何らかの大きな外力が加わると、例えば第
7図に示すように、連結部(116),(117)から塑剤変
形してしまうという欠点がある。このように取付板(10
7)が変形してしまうと、回動アーム部(102)に磁気ヘ
ッド部(104)を精度良く固定することが困難となって
しまう。たとえ、取付板(107)に磁気ヘッド部(104)
を取付けたとしても、取付板(107)と磁気ヘッド部(1
04)のディスク対接面とが非平行状態となり、キャリッ
ジ部(101)側と合体する際の磁気ヘッド(103)と(10
4)との位置精度〔通常、各ヘッド部(103)(104)の
磁気ギャップG1G2間はトラック若しくは8トラックずれ
ている。)が出し難いという欠点がある。さらには、磁
気ディスク(105)との摺接状態が不安定となり、電磁
変換特性の劣化を招来する。That is, in the assembling process of the magnetic head device, if some large external force is applied to the mounting plate (107), for example, as shown in FIG. 7, the connecting portions (116) and (117) are plastically deformed. There is. In this way, the mounting plate (10
If 7) is deformed, it becomes difficult to fix the magnetic head part (104) to the rotating arm part (102) with high accuracy. Even if the magnetic head (104) is attached to the mounting plate (107).
Even if the mounting plate is attached, the mounting plate (107) and the magnetic head (1
The disc contact surface of (04) becomes non-parallel and the magnetic heads (103) and (10
4) Positional accuracy [Normally, the magnetic gaps G 1 G 2 of the heads (103) and (104) are displaced by 8 tracks or 8 tracks. ) Is difficult to put out. Furthermore, the state of sliding contact with the magnetic disk (105) becomes unstable, resulting in deterioration of electromagnetic conversion characteristics.
そこで、本発明は上述の実情に鑑みて提案されたもので
あり、前述の取付板の長所を生かしながら、磁気ヘッド
装置の組立て工程で生じる変形不良が皆無で磁気ヘッド
装置の製造方法を提供することを目的とする。Therefore, the present invention has been proposed in view of the above circumstances, and provides a method of manufacturing a magnetic head device that does not have any deformation defects that occur in the assembly process of the magnetic head device, while making use of the advantages of the mounting plate described above. The purpose is to
上述の目的を達成するために、本発明の磁気ヘッド装置
の製造方法は、切欠きを設けることにより変形自在とな
した取付板に磁気回路部とスライダ部とからなる磁気ヘ
ッド部を固定するに際し、上記取付板の切欠きに連結補
強部を残存した状態で上記磁気ヘッド部を取付け、その
後、上記連結補強部を切断することを特徴とするもので
ある。In order to achieve the above-mentioned object, a method of manufacturing a magnetic head device according to the present invention is a method for fixing a magnetic head portion including a magnetic circuit portion and a slider portion to a mounting plate which is deformable by providing a notch. The magnetic head portion is attached to the notch of the mounting plate with the coupling reinforcing portion remaining, and then the coupling reinforcing portion is cut.
このように取付板には、その切欠きの一部に補強を目的
とした連結補強部が残存されているので、上記取付板の
機械的強度は大幅に向上する。このため、上記取付板に
磁気ヘッド部を取付ける際に、取付板が変形することが
なくなる。As described above, since the connecting reinforcing portion for the purpose of reinforcement remains in a part of the notch of the mounting plate, the mechanical strength of the mounting plate is significantly improved. Therefore, the mounting plate does not deform when the magnetic head is mounted on the mounting plate.
また、取付板に磁気ヘッドを取付けた後、上記連結補強
部を切断しているので、取付板に要求される可撓性は確
保される。Further, after the magnetic head is mounted on the mounting plate, the connecting reinforcing portion is cut, so that the flexibility required for the mounting plate is secured.
以下、本発明の一実施例を図面を参照しながら説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
本発明により磁気ヘッド装置を製造するには、先ず、第
1図に示す取付板(1)及び第2図に示す磁気ヘッド部
(11)をそれぞれ作製する。In order to manufacture the magnetic head device according to the present invention, first, the mounting plate (1) shown in FIG. 1 and the magnetic head portion (11) shown in FIG. 2 are manufactured.
本発明に係る上記取付板(1)を作製するには、例えば
Cu−Be合金よりなり厚みが0.05mmの銅合金板に対して、
エッチング加工やプレス加工等により略コ字状の切欠き
(2),(3),(4),(5)を形成する。To produce the mounting plate (1) according to the present invention, for example,
For a copper alloy plate made of Cu-Be alloy and having a thickness of 0.05 mm,
The substantially U-shaped notches (2), (3), (4), and (5) are formed by etching or pressing.
上記切欠き(2),(3),(4),(5)は、それぞ
れ内周に切欠かれた切欠き(2),(3)によって第1
図中X方向の回りに可動自在となるような連結部(6
A),(6B)を残存し、また外周の切欠き(4),
(5)により第1図中Y方向の回りに可動自在となるよ
うな連結部(7a),(7b)を残存するように形成する。
同時に本考案にあっては、取付板(1)の機械的強度を
確保するために、各切欠き(2),(3),(4),
(5)の角部に連結補強部(2A),(2B),(3A),
(3B),(4A),(4B),(5A),(5B)を残存させ
る。すなわち、切欠き(2)は切欠き部(2a),(2
b),(2c)で構成し、同様に切欠き(3)は切欠き部
(3a),(3b),(3c)、切欠き(4)は切欠き部(4
a),(4b),(4c)、切欠き(5)は切欠き部(5
a),(5b),(5c)で構成するように切欠く。なお、
上述の例では連結補強部を8個所設けたが、本発明はこ
れに限定されるものではなく、取付板(1)の強度が確
保でき且つ取付板(1)の機能を損なわない範囲で適宜
設定することができる。The notches (2), (3), (4) and (5) are firstly formed by the notches (2) and (3) which are notched on the inner circumference.
A connecting part (6
A) and (6B) remain, and notches (4) and
By (5), the connecting portions (7a) and (7b) that are movable in the Y direction in FIG. 1 are formed so as to remain.
At the same time, in the present invention, in order to secure the mechanical strength of the mounting plate (1), each notch (2), (3), (4),
Connection reinforcements (2A), (2B), (3A), at the corners of (5),
(3B), (4A), (4B), (5A), (5B) are left. That is, the notch (2) is the notch (2a), (2
b) and (2c). Similarly, the notch (3) is the notch (3a), (3b), (3c), and the notch (4) is the notch (4).
a), (4b), (4c), the notch (5) is the notch (5
Cut out as shown in a), (5b), and (5c). In addition,
In the above example, the eight connecting reinforcement portions were provided, but the present invention is not limited to this, and is appropriate within a range in which the strength of the mounting plate (1) can be secured and the function of the mounting plate (1) is not impaired. Can be set.
一方、フロッピーディスク等の磁気ディスクに書込みあ
るいは読出しを行う磁気ヘッド部(11)としては、この
種の磁気ディスクに使用されるものであれば従来公知の
如何なる構造のものも採用できる。本実施例では、第2
図に示すように、先に本願出願人が提案した、いわゆる
トンネルイレーズ型の磁気回路部を有する磁気ヘッド部
(11)を使用した。On the other hand, as the magnetic head portion (11) for writing or reading on a magnetic disk such as a floppy disk, any conventionally known structure can be adopted as long as it is used for this type of magnetic disk. In this embodiment, the second
As shown in the figure, a magnetic head portion (11) having a so-called tunnel erase type magnetic circuit portion, which was previously proposed by the applicant of the present application, was used.
上記磁気ヘッド部(11)を製造するには、先ず、非磁性
材(18a)を介して接合された棒状のセンターコア部(1
8)の両側にそれぞれL字状の記録再生コア部(21)及
び消去コア部(22)を突き合わせ記録再生用ギャップg1
及び消去用ギャップg2を有するフロントコア(12)を作
製する。次に、上記フロントコア(12)の両側にセラミ
ック等よりなるスライダ(16),(17)を接合した後、
ディスク対接面を研磨する。次いで、上記フロントコア
(12)の形状に対応して略コ字状のバックコア(13)を
記録再生コイル(14),消去コイル(15)内で段重ねの
状態で重ね合わせ、さらに各コイル(14),(15)内で
それぞれ板バネ(図示せず)によって固定して磁気回路
部を構成し磁気ヘッド部(11)を完成する。In order to manufacture the magnetic head portion (11), first, a rod-shaped center core portion (1) joined via a non-magnetic material (18a) is used.
8) L-shaped recording / reproducing core section (21) and erasing core section (22) are abutted on both sides, and the recording / reproducing gap g 1
A front core (12) having an erasing gap g 2 is produced. Next, after joining the sliders (16) and (17) made of ceramic or the like to both sides of the front core (12),
Polish the disc contact surface. Then, a substantially U-shaped back core (13) corresponding to the shape of the front core (12) is stacked in the recording / reproducing coil (14) and the erasing coil (15) in a stacked state, and each coil is further stacked. The magnetic head portion (11) is completed by fixing the respective insides of (14) and (15) by leaf springs (not shown) to form a magnetic circuit portion.
得られる磁気ヘッド部(11)においては、消去ギャップ
g2が、上記記録再生ギャップg1で記録される記録トラッ
クの両端部を消去する構成となっており、フロッピーデ
ィスクに記録される各記録トラック間には、いわゆるカ
ードバンド部が形成され、たとえ若干のオフ・トラック
状態となっても、良好な記録再生特性が得られるように
なっている。In the resulting magnetic head (11), the erase gap
g 2 is configured to erase both ends of the recording track recorded in the recording / reproducing gap g 1 , and a so-called card band part is formed between the recording tracks recorded on the floppy disk. Good recording and reproducing characteristics can be obtained even in a slight off-track state.
次ぎに、第3図に示すように、上記取付板(1)の所定
位置に上記磁気ヘッド部(11)を接着剤にて固定する。
この時、上記取付板(1)は連結補強部(2A),(2
B),(3A),(3B)及び(4A),(4B),(5A),(5
B)により強固な構造となっているので、取付板(1)
が変形することはない。Next, as shown in FIG. 3, the magnetic head portion (11) is fixed to a predetermined position of the mounting plate (1) with an adhesive.
At this time, the mounting plate (1) is connected to the reinforcing parts (2A), (2
B), (3A), (3B) and (4A), (4B), (5A), (5
B) has a strong structure, so the mounting plate (1)
Does not deform.
その後、第4図に示すように、磁気ヘッド部(11)を損
傷しないように、上記連結補強部(2A),(2B),(3
A),(3B)及び(4A),(4B),(5A),(5B)をプ
レス加工あるいはレーザ照射等により切断する。なお、
この連結補強部の切断工程は、磁気ヘッド装置を回動ア
ーム部に取りつけた後に行っても良い。After that, as shown in FIG. 4, the connection reinforcing portions (2A), (2B), (3) are arranged so as not to damage the magnetic head portion (11).
A), (3B) and (4A), (4B), (5A), (5B) are cut by press working or laser irradiation. In addition,
The step of cutting the connection reinforcing portion may be performed after the magnetic head device is attached to the rotating arm portion.
このように、取付板(1)補強用の連結補強部の切断を
組み立ての最終工程で行っているので、組み立て中に取
付板(1)にある程度の外力が加わっても変形する心配
はない。したがって、磁気ヘッド装置を回動アーム部に
取付ける際の位置精度やキャリッジ部側との合体精度が
大幅に向上する。As described above, since the connecting reinforcing portion for reinforcing the mounting plate (1) is cut in the final step of assembly, there is no fear of deformation even if a certain external force is applied to the mounting plate (1) during assembly. Therefore, the positional accuracy when the magnetic head device is attached to the rotating arm portion and the accuracy with which the magnetic head device is combined with the carriage portion are significantly improved.
また、組み立ての最終工程で上記連結補強部(2A),
(2B),(3A),(3B)及び(4A),(4B),(5A),
(5B)を切断しているので、磁気ヘッド部(11)は第4
図中X方向,Y方向,Z方向に対して可動状態となり、磁気
ディスクの動きに対して良好な追従性を示すとともに、
フロッピーディスクとの摺接状態も良好なものとなり電
磁変換特性の向上が図れる。In addition, in the final step of assembly, the above-mentioned connecting reinforcement (2A),
(2B), (3A), (3B) and (4A), (4B), (5A),
Since (5B) is cut, the magnetic head (11) is
In the figure, it becomes movable in the X, Y, and Z directions, showing good followability to the movement of the magnetic disk, and
The sliding contact with the floppy disk is also good, and the electromagnetic conversion characteristics can be improved.
以上、両面型磁気ヘッド装置の回動アーム部側に取付け
られる取付板について説明したが、キャリッジ部側の取
付板や、片面型磁気ヘッド装置の取付板にも本発明は適
用される。Although the mounting plate mounted on the rotating arm side of the double-sided magnetic head device has been described above, the present invention is also applicable to the mounting plate on the carriage side and the mounting plate of the single-sided magnetic head device.
以上の説明からも明らかなように、本発明によれば、磁
気ヘッド部を固定する時点では取付板の切欠きに連結補
強部を残存させておき、最終工程でこの連結補強部を切
断しているので、組み立て中に取付板が変形することが
なくなる。これにより、取付板と磁気ヘッド部のディス
ク対接面の平行度が精度良く保たれ、キャリッジ部と回
動アーム部のヘッド部の合体精度出しが容易となる。し
たがって、歩留まりも向上する。As is clear from the above description, according to the present invention, at the time of fixing the magnetic head portion, the coupling reinforcing portion is left in the notch of the mounting plate, and the coupling reinforcing portion is cut in the final step. Therefore, the mounting plate will not be deformed during assembly. As a result, the parallelism between the mounting plate and the disk-contacting surface of the magnetic head portion is maintained with high precision, and it becomes easy to obtain the accuracy of combining the carriage portion and the head portion of the rotating arm portion. Therefore, the yield is also improved.
また、最終工程で連結補強部を切断していることより、
取付板に要求される可撓性は十分に確保できるので、磁
気ヘッド部の追従性や摺接状態は良好なものとなる。Also, by cutting the connecting reinforcement part in the final step,
Since the flexibility required for the mounting plate can be sufficiently secured, the followability of the magnetic head portion and the sliding contact state are good.
第1図ないし第4図は本発明の磁気ヘッド装置の製造方
法をその工程順に示すもので、第1図は取付板形成工程
を示す斜視図、第2図は磁気ヘッド部の組み立て工程を
示す斜視図、第3図は磁気ヘッド部の固定工程を示す斜
視図、第4図は連結補強部の切断工程を示す斜視図であ
る。 第5図は磁気ヘッド装置を示す概略的な側面図である。 第6図は従来の製造工程で使用された取付板の斜視図、
第7図は変形した取付板を示す斜視図である。 1……取付板 2,3,4,5……切欠き 2A,2B,3A,3B,4A,4B,5A,5B……連結補強部 5A,5B,6A,6B……連結部 11……磁気ヘッド部1 to 4 show a method of manufacturing a magnetic head device according to the present invention in the order of steps thereof. FIG. 1 is a perspective view showing a mounting plate forming step, and FIG. 2 is a magnetic head assembly step. FIG. 3 is a perspective view showing a step of fixing the magnetic head portion, and FIG. 4 is a perspective view showing a step of cutting the coupling reinforcing portion. FIG. 5 is a schematic side view showing the magnetic head device. FIG. 6 is a perspective view of a mounting plate used in a conventional manufacturing process,
FIG. 7 is a perspective view showing a modified mounting plate. 1 …… Mounting plate 2,3,4,5 …… Notch 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B …… Connecting reinforcement part 5A, 5B, 6A, 6B …… Connecting part 11 …… Magnetic head
Claims (1)
た取付板に磁気回路部とスライダ部とからなる磁気ヘッ
ドを固定するに際し、 上記取付板の切欠きに連結補強部を残存した状態で上記
磁気ヘッド部を取付け、 その後、上記連結補強部を切断することを特徴とする磁
気ヘッド装置の製造方法。1. When fixing a magnetic head composed of a magnetic circuit portion and a slider portion to a mounting plate which is deformable by providing a notch, a connecting reinforcing portion remains in the notch of the mounting plate. A method for manufacturing a magnetic head device, comprising: mounting the magnetic head portion, and then cutting the coupling reinforcing portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10353386A JPH071590B2 (en) | 1986-05-06 | 1986-05-06 | Method of manufacturing magnetic head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10353386A JPH071590B2 (en) | 1986-05-06 | 1986-05-06 | Method of manufacturing magnetic head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62259209A JPS62259209A (en) | 1987-11-11 |
| JPH071590B2 true JPH071590B2 (en) | 1995-01-11 |
Family
ID=14356507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10353386A Expired - Fee Related JPH071590B2 (en) | 1986-05-06 | 1986-05-06 | Method of manufacturing magnetic head device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071590B2 (en) |
-
1986
- 1986-05-06 JP JP10353386A patent/JPH071590B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62259209A (en) | 1987-11-11 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |