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JPH0340277A - Floating head slider sensor - Google Patents

Floating head slider sensor

Info

Publication number
JPH0340277A
JPH0340277A JP17310189A JP17310189A JPH0340277A JP H0340277 A JPH0340277 A JP H0340277A JP 17310189 A JP17310189 A JP 17310189A JP 17310189 A JP17310189 A JP 17310189A JP H0340277 A JPH0340277 A JP H0340277A
Authority
JP
Japan
Prior art keywords
piezoelectric element
head slider
floating head
slider
face
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
JP17310189A
Other languages
Japanese (ja)
Inventor
Kyosuke Yasuda
安田 享祐
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP17310189A priority Critical patent/JPH0340277A/en
Publication of JPH0340277A publication Critical patent/JPH0340277A/en
Pending legal-status Critical Current

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  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To detect the fine vibration of a floating head slider to be applied on the other face of a piezoelectric element with high sensitivity by arranging the piezoelectric element on the lower face or upper face of a loading pivot and operating vibration suppressing force to one face of the piezoelectric element by a load spring. CONSTITUTION:A piezoelectric element 15 is arranged between a loading point pivot 13 and a pressurized supplying spring part 14 so as to be adhered and coupled with them. A floating head slider sensor A detects the fine vibration to be generated by collision with a projection on a magnetic disk and in such a case, however, the vibration of a floating head slider 11 is applied through the loading point pivot 13 to a face 15a of the piezoelectric element 15. On the other hand, the vibration is suppressed on a face 15b on an opposite side since the face 15b is fixed to the pressurized supporting spring part 14. Accordingly, the output voltage of the piezoelectric element 15 is generated by a piezoelectric effect caused by the difference of the vibration between the both faces 15a and 15b of the piezoelectric element 15 and the sensitivity is improved in comparison with the piezoelectric element 15 for which one side is a free space. Thus, the floating head slider sensor with the high sensitivity can be acquired.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は磁気ディスク検定用に用いる高感度な浮動ヘッ
ドスライダセンサに関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a highly sensitive floating head slider sensor used for magnetic disk verification.

〔従来の技術〕[Conventional technology]

第5図(a) (b)は従来の浮動ヘッドスライダセン
サの図である。咳図において、lは浮動ヘッドスライダ
、2は該浮動ヘッドスライダ1の上面(背面)に結合配
置したスライダジンバル支持部、3は該スライダジンバ
ル支持部2の上面(背面)に突出加工して形成した荷重
点ピボット、4は該荷重点ピボット3に圧接する加圧支
持ばね部、5は浮動ヘッドスライダ1の背面の後端部に
配置した圧電素子である。なお、該圧電素子5は浮動ヘ
ッドスライダ1の背面前端部に配置されることもある。
FIGS. 5(a) and 5(b) are diagrams of a conventional floating head slider sensor. In the figure, 1 is a floating head slider, 2 is a slider gimbal support part connected to the top surface (back surface) of the floating head slider 1, and 3 is formed by protruding from the top surface (back surface) of the slider gimbal support part 2. The load point pivot 4 is a pressurizing support spring portion that presses against the load point pivot 3, and the numeral 5 is a piezoelectric element disposed at the rear end of the back surface of the floating head slider 1. Note that the piezoelectric element 5 may be arranged at the front end of the back surface of the floating head slider 1.

これら浮動ヘッドスライダ1、スライダジンバル支持部
2、荷重点ピボット3、加圧支持ばね部4及び圧電素子
5により浮動ヘッドスライダセンサSが構成される。
The floating head slider 1, slider gimbal support section 2, load point pivot 3, pressure support spring section 4, and piezoelectric element 5 constitute a floating head slider sensor S.

ここで5aは圧電素子5の浮動ヘントスライダ側の面、
5bは圧電素子5の自由空間側の面を示している。そし
てこれら両面5a、5bに電極が取り付けられ、圧電素
子5の圧力がセンサ出力としてとりだされる。
Here, 5a is the surface of the piezoelectric element 5 on the floating hent slider side;
5b indicates the surface of the piezoelectric element 5 on the free space side. Electrodes are attached to both surfaces 5a and 5b, and the pressure of the piezoelectric element 5 is taken out as a sensor output.

第6図は第5図の浮動ヘッドスライダセンサSの検定使
用状態図である。核間において6は磁気ディスク、6a
は磁気ディスク上の突起を示している。浮動ヘッドスラ
イダセンサSはこのような突起6aを検出するために使
用される。
FIG. 6 is a diagram showing the state in which the floating head slider sensor S shown in FIG. 5 is used for verification. Between the nuclei, 6 is a magnetic disk, 6a
indicates a protrusion on the magnetic disk. The floating head slider sensor S is used to detect such a protrusion 6a.

磁気ディスク6上には稀に浮動ヘッドスライダlが追従
走行不可能な上記のような突起6aが存在するので、こ
のような突起6aを有する磁気ディスクは、磁気ディス
ク装置の組立に際してあらかじめ除外する必要がある。
In rare cases, there is a protrusion 6a on the magnetic disk 6 that the floating head slider l cannot follow, so it is necessary to remove the magnetic disk having such a protrusion 6a beforehand when assembling the magnetic disk device. There is.

そのためにこのような突起6aの有無を浮動ヘッドスラ
イダセンサSによって調べることが一般的に行われてい
る。
For this reason, it is common practice to use a floating head slider sensor S to check for the presence or absence of such a protrusion 6a.

浮動ヘッドスライダセンサSは通常の浮動ヘッドスライ
ダと同様に磁気ディスク6上に一定隙間を保って浮動し
ている。浮動ヘッドスライダ1は突起6aと衝突すると
僅かに振動する。この振動を圧電素子5によって検出す
る。ここで圧電素子5の出力電圧は圧電素子5の2つの
面5a、5bの振動の差分による圧電効果によって発生
する。
The floating head slider sensor S floats above the magnetic disk 6 with a constant gap maintained therein like a normal floating head slider. The floating head slider 1 vibrates slightly when it collides with the protrusion 6a. This vibration is detected by the piezoelectric element 5. Here, the output voltage of the piezoelectric element 5 is generated by the piezoelectric effect due to the difference in vibration between the two surfaces 5a and 5b of the piezoelectric element 5.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ところが圧電素子5の片面5bは自由空間に露出してい
るため、この面5bも浮動ヘッドスライダ1の面と同位
相で振動し、高感度検出が難し7いという欠点があった
。この問題を解決するために圧電素子5の厚さを大きく
して自由空間側の振動を抑えることによって高感度化を
図っている。しかし、圧電素子5を大きくすると、浮動
ヘッドスライダとしての動特性か悪化するのでその大き
さには限度があった。
However, since one side 5b of the piezoelectric element 5 is exposed to free space, this side 5b also vibrates in the same phase as the surface of the floating head slider 1, making high-sensitivity detection difficult. In order to solve this problem, the thickness of the piezoelectric element 5 is increased to suppress vibrations on the free space side, thereby increasing the sensitivity. However, increasing the size of the piezoelectric element 5 deteriorates the dynamic characteristics of the floating head slider, so there is a limit to its size.

本発明は上記のような事情に鑑みてなされたもので、そ
の目的は高感度な浮動ヘッドスライダセンサを提供する
ことである。
The present invention has been made in view of the above circumstances, and its purpose is to provide a highly sensitive floating head slider sensor.

〔課題を解決するための手段〕[Means to solve the problem]

このために第1の発明は、荷重点ピボット部と加圧支持
バネ部との間あるいは上記荷重点ピボット部とヘッドス
ライダとの間に圧電素子を接着配置した。
For this purpose, in the first invention, a piezoelectric element is adhesively disposed between the load point pivot section and the pressure support spring section or between the load point pivot section and the head slider.

第2の発明は、荷重点ピボット部と加圧支持バネ部との
間に圧電素子を差込配置した。
In the second invention, a piezoelectric element is inserted between the load point pivot part and the pressure support spring part.

〔実施例〕〔Example〕

以下、本発明の実施例の浮動・\ノドスライダセンサに
ついて説明する。本実施例では浮動ヘッドスライダの荷
重ピボットの上部あるいは下部に圧電素子を配置するこ
とが主要な特徴である。
A floating/throat slider sensor according to an embodiment of the present invention will be described below. The main feature of this embodiment is that the piezoelectric element is placed above or below the load pivot of the floating head slider.

実施例1 第1図(al (b>は第1の実施例の浮動ヘッドスラ
イダセンサAの説明図である。11は浮動ヘッドスライ
ダ、12はスライダジンバル支持部、13は荷重点ピボ
ット、14は加圧支持ばね部、15は圧電素子である。
Embodiment 1 FIG. 1 (al (b) is an explanatory diagram of the floating head slider sensor A of the first embodiment. 11 is a floating head slider, 12 is a slider gimbal support part, 13 is a load point pivot, and 14 is an explanatory diagram of a floating head slider sensor A of the first embodiment. The pressure support spring portion 15 is a piezoelectric element.

これら各部品自体は従来の浮動ヘノドスライダセ/すS
のものと同jンである。
Each of these parts itself is a conventional floating henodic slider/S.
It is the same as the one.

本実施例では圧電素子15を荷重点ピボット13と加圧
支持ばね部14の間に接着結合配置した。
In this embodiment, the piezoelectric element 15 is adhesively bonded and disposed between the load point pivot 13 and the pressure support spring section 14.

この点が本実施例の特徴となっている。This point is a feature of this embodiment.

ここで15aは圧電素−715の荷重ビボソト支3側の
面、15bは圧電素子15の加圧ばね部14側の面を示
している。そしてこれら両面15a、15bに電極が取
り付けられ、圧電素子15の圧力がセンサ出力とし、て
とりだされる。
Here, 15a indicates the surface of the piezoelectric element 715 on the load bearing support 3 side, and 15b indicates the surface of the piezoelectric element 15 on the pressure spring portion 14 side. Electrodes are attached to both surfaces 15a and 15b, and the pressure of the piezoelectric element 15 is taken out as a sensor output.

本実施例の浮動ヘッドスライダセンサAも上述した従来
の浮動へノドスライダセンサSと同様に磁気ディスク6
上の突起6aとの衝突によって生じる微少な振動を検出
する。
The floating head slider sensor A of this embodiment also has a magnetic disk 6 similar to the above-described conventional floating head slider sensor S.
The minute vibrations caused by the collision with the upper protrusion 6a are detected.

この場合浮動ヘッドスライダ11の振動は荷重点ピボッ
ト13を介して圧電素子15の面15aに加わる。一方
これと反対側の面15bは加圧支持ばね部14に固定さ
れているため振動が抑えられる。圧電素子15の出力電
圧は圧電素子15の両面15a、15bの振動の差分に
よる圧電効果によって発生する。従って本実施例の圧電
素子15は、従来の浮動ヘノトスライダセンサSにおけ
る圧電素子5の片面側が自由空間であるものに比し、格
段に感度向上が可能となる。
In this case, the vibrations of the floating head slider 11 are applied to the surface 15a of the piezoelectric element 15 via the load point pivot 13. On the other hand, since the surface 15b on the opposite side is fixed to the pressure support spring section 14, vibrations are suppressed. The output voltage of the piezoelectric element 15 is generated by the piezoelectric effect caused by the difference in vibration between both surfaces 15a and 15b of the piezoelectric element 15. Therefore, the piezoelectric element 15 of this embodiment can significantly improve sensitivity compared to the conventional floating henoto slider sensor S in which one side of the piezoelectric element 5 is a free space.

これを確認するために、厚さ0 、25mm、幅2問、
長さ211111の圧電素子を、同一浮動ヘノドスライ
ダに、本実施例方式と従来方式の配置構成で組込んだ浮
動ヘッドスライダセンサを作製し、各々に加振器により
振動を加え、両圧電素子の出力の比較試験を行った。
To confirm this, the thickness is 0, 25mm, the width is 2 questions,
A floating head slider sensor was fabricated in which piezoelectric elements with a length of 211,111 mm were incorporated into the same floating henodic slider in the arrangement configurations of this embodiment method and the conventional method, and vibration was applied to each using an exciter to increase the output of both piezoelectric elements. A comparative test was conducted.

第4図はその比較試験結果の図である。該図からも明ら
かのように、振動周波数により異なるが従来方式に比し
センサ出力が約3桁も向上可能であることが分かる。
FIG. 4 is a diagram showing the results of the comparative test. As is clear from the figure, it can be seen that the sensor output can be improved by about three orders of magnitude compared to the conventional method, although it differs depending on the vibration frequency.

実施例2 第2図(al (blは第2の実施例の浮動ヘッドスラ
イダセンサBの説明図である。21は浮動へソドスライ
ダ、22はスライダジンバル支持部、23は荷重点ピボ
ソト、24は加圧支持ばね部、25は圧電素子である。
Embodiment 2 FIG. 2 (al) is an explanatory diagram of the floating head slider sensor B of the second embodiment. 21 is a floating slider, 22 is a slider gimbal support, 23 is a load point pivot, and 24 is an explanatory diagram of a floating head slider sensor B of the second embodiment. The pressure support spring portion 25 is a piezoelectric element.

これら各部品自体も上記従来の浮動ヘノトスライダセン
サSのものと同しである。
These parts themselves are also the same as those of the conventional floating henoto slider sensor S mentioned above.

本実施例では圧電素子25を浮動ヘッドスライダ21の
背面と荷重点ピボソト23の間に接着結合配置した。こ
の点が本実施例の特徴となっている。
In this embodiment, the piezoelectric element 25 is adhesively bonded between the back surface of the floating head slider 21 and the load point pivot 23. This point is a feature of this embodiment.

ここで25aは圧電素子25の浮動ヘントスライダ21
の背面側の面、25bは圧電素子15の荷重点ピボソト
23例の面を示している。
Here, 25a is the floating hent slider 21 of the piezoelectric element 25.
The back side surface 25b indicates the surface of 23 examples of load point pivots of the piezoelectric element 15.

この場合浮動ヘッドスライダ21の振動は浮動ヘッドス
ライダ21から直接圧電素子250面25aに加わる。
In this case, the vibration of the floating head slider 21 is applied directly from the floating head slider 21 to the surface 25a of the piezoelectric element 250.

これに対し荷重点ピボソト23側の面25bの振動は荷
重点ピボット23を介し加圧支持ばね部24のばね力で
抑えられる。従って本実施例でも、従来の圧電素子5の
片面側が自由空間である浮動ヘノトスライダセンサSに
比し、圧電素子25は格段に感度向上が可能となる。
On the other hand, the vibration of the surface 25b on the side of the load point pivot 23 is suppressed by the spring force of the pressurizing support spring section 24 via the load point pivot 23. Therefore, in this embodiment as well, the sensitivity of the piezoelectric element 25 can be significantly improved compared to the conventional floating henoto slider sensor S in which one side of the piezoelectric element 5 is a free space.

実施例3 第3図(a) (b)は第3の実施例の浮動ヘッドスラ
イダセンサCの説明図である。31は浮動ヘントスライ
ダ、32はスライダジンバル支持部、33は荷重点ピボ
ット、34は加圧支持ばね部、35は圧電素子である。
Embodiment 3 FIGS. 3(a) and 3(b) are explanatory diagrams of a floating head slider sensor C according to a third embodiment. 31 is a floating hent slider, 32 is a slider gimbal support section, 33 is a load point pivot, 34 is a pressure support spring section, and 35 is a piezoelectric element.

これら各部品自体も従来の浮動ヘノトスライダセンサS
のものと同じである。
These parts themselves are also similar to the conventional floating henoto slider sensor S.
It is the same as that of

本実施例では圧電素子35を荷重点ピボット33と加圧
支持ばね部340間に接着結合せずに挟み込んで配置し
た。この点が本実施例の特徴となっている。従って、第
1及び第2の実施例の浮動ヘッドスライダセンサA、B
に比較し、圧電素子35の組み込みがきわめて容易とな
る。
In this embodiment, the piezoelectric element 35 is sandwiched between the load point pivot 33 and the pressure support spring part 340 without being adhesively bonded. This point is a feature of this embodiment. Therefore, the floating head slider sensors A and B of the first and second embodiments
Compared to the above, it is extremely easy to incorporate the piezoelectric element 35.

ここで353は圧電素子35の荷重ピボット33側の面
、35bは圧電素子35の加圧支持ばね部34側の面を
示している。
Here, 353 indicates a surface of the piezoelectric element 35 on the load pivot 33 side, and 35b indicates a surface of the piezoelectric element 35 on the pressure support spring section 34 side.

この場合浮動ヘッドスライダ31の振動は荷重点ピボソ
ト33を介して圧電素子35の面35aに加わる。一方
これと反対側の面31bの振動は荷重ばね力で抑えられ
る。従って本実施例でも、従来の片面側が自由空間であ
る圧電素子5に比し、圧電素子25は格段に感度向上が
可能となる。
In this case, the vibration of the floating head slider 31 is applied to the surface 35a of the piezoelectric element 35 via the load point pivot 33. On the other hand, vibrations on the opposite surface 31b are suppressed by the load spring force. Therefore, in this embodiment as well, the sensitivity of the piezoelectric element 25 can be significantly improved compared to the conventional piezoelectric element 5 which has a free space on one side.

〔発明の効果〕〔Effect of the invention〕

以上から本発明によれば、圧電素子を荷重ピボットの下
面又は上面に配置し、圧電素子の片面に荷重ばねによる
振動抑止力が働くようにしたので、圧電素子の他面に加
わる浮動へソドスライダの微少振動を高感度で検出する
ことができる利点がある。
From the above, according to the present invention, the piezoelectric element is disposed on the lower or upper surface of the load pivot, and the vibration suppressing force by the load spring acts on one side of the piezoelectric element, so that the floating force applied to the other side of the piezoelectric element causes the slider to It has the advantage of being able to detect minute vibrations with high sensitivity.

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

第1図ta)は本発明の第1の実施例の浮動ヘッドスラ
イダセンサの平面図、第1図fblはその一部を端面で
表した正面図、第2図(a)は第2の実施例の浮動ヘノ
トスライダセンサの平面図、第2図(blはその一部を
端面で表した正面図、第3図falは第3の実施例の浮
動ヘッドスライダセンサの平面図、第3図(111はそ
の一部を端面で表した正面図、第4図は第1の実施例と
従来の浮動へ・7ドスライダセンサとの感度比較試験結
果を示す特性線図、第5図(a)は従来の浮動ヘッドス
ライダセンサの平面図、第5図(blはその一部を端面
で表した正面図、第6図は従来の浮動ヘッドスライダセ
ンサの使用状態図である。 11.21.31・・・浮動へソドスライダ、12、2
2.32・・・スライダジンバル支持部、13.23.
33・・・荷重点ピボット、14.24.34・・・加
圧支持ばね部、15.25.35・・・圧電素子。
FIG. 1 ta) is a plan view of a floating head slider sensor according to a first embodiment of the present invention, FIG. FIG. 2 is a plan view of the floating head slider sensor of the example (bl is a front view showing a part of it as an end surface, FIG. 3 fal is a plan view of the floating head slider sensor of the third embodiment, FIG. 3) (111 is a front view showing a part of it as an end surface, FIG. 4 is a characteristic diagram showing the results of a sensitivity comparison test between the first embodiment and a conventional floating slider sensor, and FIG. 5 (a) ) is a plan view of a conventional floating head slider sensor, FIG. 5 (bl is a front view partially shown as an end face), and FIG. 6 is a diagram of the conventional floating head slider sensor in use. 11.21. 31...Sodo slider to floating, 12, 2
2.32...Slider gimbal support part, 13.23.
33... Load point pivot, 14.24.34... Pressure support spring section, 15.25.35... Piezoelectric element.

Claims (2)

【特許請求の範囲】[Claims] (1)、浮動ヘッドスライダと、該浮動ヘッドスライダ
と結合されたスライダジンバル支持部と、該スライダジ
ンバル支持部の端部と結合された加圧支持バネとを備え
、上記加圧支持バネ部の先端部が上記スライダジンバル
支持部の背面に突出形成された荷重点ピボット部を介し
て上記浮動ヘッドスライダに荷重を与えるように構成し
た浮動ヘッドスライダセンサにおいて、 上記荷重点ピボット部と上記加圧支持バネ部との間ある
いは上記荷重点ピボット部と上記ヘッドスライダとの間
に圧電素子を接着配置したことを特徴とする浮動ヘッド
スライダセンサ。
(1) comprising a floating head slider, a slider gimbal support part coupled to the floating head slider, and a pressure support spring coupled to an end of the slider gimbal support part; A floating head slider sensor configured to apply a load to the floating head slider via a load point pivot portion whose tip portion is formed to protrude from the back surface of the slider gimbal support portion, the load point pivot portion and the pressure support portion. A floating head slider sensor characterized in that a piezoelectric element is adhesively disposed between the spring section or between the load point pivot section and the head slider.
(2)、浮動ヘッドスライダと、該浮動ヘッドスライダ
と結合されたスライダジンバル支持部と、該スライダジ
ンバル支持部の端部と結合された加圧支持バネとを備え
、上記加圧支持バネ部の先端部が上記スライダジンバル
支持部の背面に突出形成された荷重点ピボット部を介し
て上記浮動ヘッドスライダに荷重を与えるように構成し
た浮動ヘッドスライダセンサにおいて、 上記荷重点ピボット部と上記加圧支持バネ部との間に圧
電素子を差込配置したことを特徴とする浮動ヘッドスラ
イダセンサ。
(2) comprising a floating head slider, a slider gimbal support part coupled to the floating head slider, and a pressure support spring coupled to an end of the slider gimbal support part; A floating head slider sensor configured to apply a load to the floating head slider via a load point pivot portion whose tip portion is formed to protrude from the back surface of the slider gimbal support portion, the load point pivot portion and the pressure support portion. A floating head slider sensor characterized by having a piezoelectric element inserted between the spring part and the spring part.
JP17310189A 1989-07-06 1989-07-06 Floating head slider sensor Pending JPH0340277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17310189A JPH0340277A (en) 1989-07-06 1989-07-06 Floating head slider sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17310189A JPH0340277A (en) 1989-07-06 1989-07-06 Floating head slider sensor

Publications (1)

Publication Number Publication Date
JPH0340277A true JPH0340277A (en) 1991-02-21

Family

ID=15954196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17310189A Pending JPH0340277A (en) 1989-07-06 1989-07-06 Floating head slider sensor

Country Status (1)

Country Link
JP (1) JPH0340277A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100448890B1 (en) * 2001-04-04 2004-09-18 주식회사 만도 Tandem booster for car with center plate sealing device
US7564649B2 (en) * 2005-04-27 2009-07-21 Seagate Technology Llc Head assembly having a sensing element to provide feedback for head-media instability
US8310779B2 (en) 2005-04-27 2012-11-13 Seagate Technology Llc Head assembly having a sensing element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100448890B1 (en) * 2001-04-04 2004-09-18 주식회사 만도 Tandem booster for car with center plate sealing device
US7564649B2 (en) * 2005-04-27 2009-07-21 Seagate Technology Llc Head assembly having a sensing element to provide feedback for head-media instability
US8310779B2 (en) 2005-04-27 2012-11-13 Seagate Technology Llc Head assembly having a sensing element
US8837075B2 (en) 2005-04-27 2014-09-16 Seagate Technology Llc Head assembly with head-media spacing control

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