TW305995B - - Google Patents
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- TW305995B TW305995B TW082108229A TW82108229A TW305995B TW 305995 B TW305995 B TW 305995B TW 082108229 A TW082108229 A TW 082108229A TW 82108229 A TW82108229 A TW 82108229A TW 305995 B TW305995 B TW 305995B
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- 230000005291 magnetic effect Effects 0.000 claims description 91
- 239000010408 film Substances 0.000 claims description 7
- 239000010409 thin film Substances 0.000 claims description 6
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 2
- 206010041349 Somnolence Diseases 0.000 claims description 2
- 230000005290 antiferromagnetic effect Effects 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 description 13
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 6
- 230000001939 inductive effect Effects 0.000 description 6
- 229910001004 magnetic alloy Inorganic materials 0.000 description 4
- 230000002079 cooperative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Classifications
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- 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
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- 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3945—Heads comprising more than one sensitive element
- G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
- G11B5/3951—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes
- G11B5/3954—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes the active elements transducing on a single track
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- 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
- Hall/Mr Elements (AREA)
- Measuring Magnetic Variables (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Description
A6 B6 . 305995 五、發明説明(1 ) (請先閲讀背面乏注意事項再塡寫本頁) 發明16園: 本發明係«於磁阻(MR)感測磁頭姐合物•且特定言之 係關於與雙MR元件姐合之薄膜MR磁頭。 相Μ抟蠤描诚 感應寫入磁頭係用於在磁性介霣*例如磁碟,上記_資 訊。記錄之資訊可以感應讖/寫磁頭讀出。另外* MR磁頭 亦可用於感拥記錄在磁性介霣上之信號。為MR磁頭所感澜 到之信號係與記錄之信號相關之磁通量成正比,而非與為 感應磁頭所感测到之通逢改變速率成比例。因此MR磁頭可.. 偵測到代表所記錄信號之磁壜,而不需餘存介霣和MR磁頭.< 間之任何相對動作。 典型之薄膜MR磁頭你姐合軍MR元件·此元件較佳像Μ具 易磁袖之導磁合金層製成。在資料《存儀器搡作時,例如 磁碟鼴動器,霣性感测霣流將被引導至MR元件。所测得之 磁場係使MR薄臟之磁矩受到力矩,造成膜之電阻率改變° 此《阻率之改變係與所董得磁埸強度成正比•並將造成 HR元件霄阻之變化。此類變化之偵测可提供與記錄在磁性 介質上之資料信號有W之黷出信號。 經濟部中央樣準局興工消费合作社印髮 當介霣或磁碟之剌餘磁矩Mrt係离時,將造成嫌出傖號 之變形。然後MR磁頭膊周期性鉋和·因此雖然胞加霣壜強 度增加許多,但是磁化維持其定向固定。在此種情況下, 將產生不需要之奇次諧數。偁次諧數係因KR磁頭磁阻之非 燦性變化而產生。當讀出信號變形時,將出現偁及奇次諧 數0 -3- 82. 5. 20,000 本紙張尺度適用中國國家標準(CNS)甲4规格(210 X 297公釐) A6 B6 經濟部中典標準局R工消费合作社印製 五、發明説明(2 ) 微小之Mrt將遘免飽和效應,*並確保於△ 0 / ί»曲線之 線性範内操作,其中Ρ為《阻率,但亦將導致較低信號 。可藉著壜加感湎鼋流而獲得較高信號。然而在先前技藝 禰準雙元件结構中*由於一届元件中之感测霣流為另一個 元件之鴒壓霣流,因此施加於每届ΜΙΤ元件之感湎《流係受 限制。此霣流必須在典型為3至5亳安培之大小*以使每 «元件之搡作點(Μ下籣稱0Ρ)係位於Διο/ρ曲線級性 皤國之中心。 發明籣逋 本發明之一個目的偽提供一種在讀出信號上可獲極大蝤 加之MR磁頭姐合物。 本發明之另一僩目的係提供一種MR磁頭姐合物•可《免 感澜霣流上之限制,並達成轤出信號振幅之極大增加。 另一個目的侏提供一種MR磁頭姐合物,允許使用具有相 當低刺餘磁矩(Mrt)之磁性介霣或磁碟。 另外一届目的係提供一種MR磁頭姐合物•可降低對MR® 測元件之磁性性霣及厚度之準確配合之要求。 根據本發明,一個謓/寫磁頭结構係结合MR感测磁頭及 置於MR结構之上的感應寫入磁頭。感應寫入磁頭係已習知 者•並鵝热知方法利用導磁合金之薄膜磁性蘑形成。本揭 示係U於祈潁MR磁頭•鼷於轚僑讀/寫磁頭结構的一部份 Ο 本發明MR磁頭係包含兩個MR元件或MR騰及兩價反嫌磁( AFe )元件或層。MR元件供以軟導磁合金製成•而且APe -4 - 本紙張又度適用中國國家標準(CMS) T 4規格(210 X 297公货) 82.6. 40,000 (請先M讀背面之注意事項再塡寫本買) -—裝· 訂. 線. 305995 A6 B6 五、發明説明(5 ) (請先閲讀背面之注意事項再塡寫本荑) 元件係以例如級錳合金(FeMn)製成。每屬AFe元件係形 成與相對MR元件相邮|且輿其緊密原子接觸。每僩AFe元 件係蕕於室溫下之交換交互作用而與MR元件耩合,並作用 如僱聒装置。在磁碟櫬内之MR磁頭姐合物的搡作時•對每 個姐合MR層及交換層*於與磁碟表面垂直之方向施加交換 磁埸He。通遇第一倨MR/AFe结構之霣流將對反面之第二 個MR/AFe结嫌提供一個磁埸。此磁場悌於與存在第二個 MR/AFe结構之交換磁場栢反之方向。 遺當偏KMR/AFe结構係痛要足將MR/APe结構置於-搡作點之電流衍生磁埸。另#一«反面之MR/ AFe结構係同 樣地儀《至其搡作黏•每届MR/AFe结構均類似或相同地 進行,寂設每届MR/ AFe结構之MR及AFe層之厚度係分別 相似或相同。交換磁埸需薄胞加電流所產生之磁場克服之 ,Μ使總淨磁埸能將每個结構置於操作黏。结果,即可使 用較5毫安培大得多的霣流。埴些較大霣流*大約2倍至 4倍於先前技»雙MR磁頭所典型使用者•將形成具最小變 形之增加鑰出信號。 形鮪诚: 本發明將參考匾形更詳细地描述,其中: 圓1係示意,截面並部分省略•舉例說明根镰本發明 之雙MR磁頭姐合物; 經濟部中*標準居R工消费合作社印製 圖2係國1 MR磁頭姐合物之部分等角視騙•省略遮蔽物 20及22,係顬示導電引腳26、24及34 ·後二者係定義出 MR磁頭结構之感測軌寬度·· -5 - 82.fi. 40.000 本紙張又度適用中國國家標準(CNS) T 4规格(210 X 297公釐) 305995 A6 B6 經濟部t央樣準局員工消费合作社印製 五、發明説明(4 ) 圖3係顯示MR元件内霣阻率之改變對缌磁埸Η所编出之 曲線,並舉例說明沿横座檷之交換磁埸He及傾壓磁場Hb之 大小的範画; 圔4係依照本發明所製成之姐合感應寫入磁顗及雙MR元 件讀出磁頭之横截面代表•部分斷裂% 菥明迕诚: 參考麵1及2 · —個雙元件HR磁頭姐合物偽包括第一僩 MR層10及幾乎完全輿位於其間、較佳為絕缘氧化蹰18平行 之第二涸MRIS12。MR曆10及12較佳係ΚΔ p / />等於或大--於1%之钦磁材料的薄_製成*每一靥鄯具有例如在100 至5 00埃之範_内、大約相同之厚度。 依照本發明,反嫌磁性(AFe )材料·例如嫌》合金( PeMn),之薄膜暦14及16係藉*例如•猶鍍方法分別沈積 在MR曆10及12之上,並與MR層共同延伸。在第一層FeMn靥 14激鍍至MR® 10之上時•於交換磁場之所需方向嫌加DC« 場。在第二曆FeMn層16濺鍍至MR曆12上時·於反方向施加 DC«場。FeMn)fl4及16之每一)係大約100至300埃厚。 薄FeMn材料係固定在MR層10及12之導磁合金上。PeMn層係 藉與MR層10及12之交換交互作用而耩合•並作用如偏壓装 置。 磁頭姐合物係藉坎磁導磁合金遮蔽物20及22而遮蔽之。 導磁合金遮蔽物20及22較佳係以81%鍊及19%嫌之姐成製 成•而且毎僩遮蔽物係大約1.5至4.0微米厚。磁頭姐合 物及遮藤物係沈稹在非磁性陶瓷材料製成之基板上(如画 一 6 - 衣纸m尺度遴用中國國家標準(CNS)甲4现格(210 X 297公釐) 82.6. 40,000 (請先閱讀背面之注意事項再壜寫本頁) •-裝- 訂· 線- 經濟部中央標準居WK工消费合作社印製 A6 B6 五、發明説明(5) 4所示)*並由其支撐之。 為了開始本發明之雙MR磁頭•在MH/AFe结構冷卻時, 藏霣流通過MR元件之靜磁耩合對及輿其相翡之FeMn反雄磁 曆,提供遵當之交換僑懕•同時MR结構及置於其上之感應 寫入磁頭(未顒示)之姐合物,在置^其上之感應寫入磁 頭之光阻硬烤之後偽冷卻至室邋。如此* MR结栂對之導磁 合金元件係於相反方向飽和•而且反嫌磁曆在此類曆冷卻 且商灌地變得更具反嫌磁性的同時,賴於所需方向之交換 耩合而定向之。因此*開始一僩磁頭结構。 … 在使用雙MR磁頭姐合物進行讖出時•偽將偏》霣流引導. 至導體34 (參見園2),然後*流一分為二,幾乎完全相 等地腌加於MR元件10及12。8著對導體對24及26施加》測 電流·於每個MR感测器10及12產生磁場Hi。從施加於每儸 感测器之感测轚流所產生之磁埸Ηί可偏壓另一個感澜器。 對稱地並反向施加於感测器上之罨流衍生磁埸•可克眼毎 個感测器之交換磁場,Μ將兩個感测器均置於搡作點(# 見圃3)。鞴著逭個感拥器姐合物·將可獲得較大之感測 霣流並因此獲得較高信號。 在此執行中*施加之《测《流係大約10至40奄安培•大 約為習知先前技蕕雙MR磁頭所使用者之2至4倍大。施加 霣流在毎儸感测器10及12產生磁埸Hi。磁場Hi將克脹由交 換)i ί4及16所造成之交換磁場He,並對稱地,但方向相反 地施加於感澜器上,如圔1所舉例說明。經遒测在5至 20奥斯特範圃內之交換磁場He偽於與磁性介霣或磁碟表面 -7- 本纸張尺度適用中國國家標準(CNS)肀4规格(210 X 297公货) 82.6. 40,000 -裝------irI-:----線 (請先閲讀背面之注意?項再填寫本荑) . B6 五、發明説明(6) 經濟部中央樣準局R工消费合作社印製 垂直之方向胞加。具較大交換磁場之反嫌磁元件可輻將相 對於磁碟表面之交換磁埸之角度從90度改變至較小角度而 調節之。 具HR層10及12之雙元件MR磁頭差動地感_到記錄信號並 將差動信號經引黼28及30轤入差動放'大器32。差動信號提 供不因霣性及热效應引起哦音之同棋拒斥並使諧數變形最 小化。可因信號雜訊比的增加獲得較高之信號轤出。同時 亦可使用具較低Mrt之磁性介霣來獲得最终之信號解析度 的增加。較大《测《流及較低Mrt之结果為在Δο/ρ曲._ 線上線性區域、與最佳搡作黏0Ρ1及0Ρ2相邮之嫌小僑移 •如圈3曲線所示。如圖所示,磁化曲線係相對於△<>/ ρ轴成對稱。具有本發明之磁頭設計•偽同時使用交換層 與雙MR曆Κ及低Mrt之介質,使阐個MR元件之厚度及磁性 性霣配合之規格係較不嚴格*此乃因為Λ/ο/ρ曲埭上操 作點之位置較不嚴苛。 圖4顯示在基板40上形成之一個姐合感應薄謓寫入磁頭 36及一個MR薄臢讀出磁頭38。HR磁頭38係包含MR靥10及 12、AFe曆14及16以及氣化物層18,如圏1所舉例說明。 在基板40及MR感測磁頭38間放置絕緣氣化物蹰42。薄腰寫 入磁頭36係包含第一靥辱磁合金靥P1M及第二曆導磁合金 雇P2·而Μ換能間距44形成速績磁性路徑。在P1及P2曆之 間鍍上霣性線圏靥46*再Μ豳缘髏48將線圈46與等磁合金 極片Ρ1及Ρ2瞞離,以避免電性短路。霣性引颺輿MRIV10及 AFe元件16之建接如Η2所舉例銳明。姐合感窳寫入磁頭 -8- 本纸張尺度遴用中困國家標準(CNS>甲4现樁(210 X 297公货) 82.6. 40,000 (請先閹讀背面之注意事項再塡寫本頁) —装_ 訂. 線· 305995 A6 B6 五、發明説明(7 ) /雙元件MR讀出磁頭具有無感觴霣流限制之增大信號輪出 ,以及經改菩之信號對雜m比率。將兩俚mr元件之準確s 合的要求最小化。 懕了解的是本發明並不受限於前述參數、尺寸及材料, 而且可於本發明之範_內進行修正。>1如·交換蹰10及 12之位置可分別與APe雇14及16頫倒。 (請先閱讀背面之注意事項再壜寫本頁) 經濟部中央標準局霣工消费合作社印製 9- 82.6. 40,000 本纸張遴用t國國家標準(CNS) T 4规格(210 X 2耵公* )
Claims (1)
- A7 B7 C7 D7 、申請專利範圍 ι·—種信號《澜磁頭•用Μ讀取出記綠在磁性介霣上之信 號·係包含 第一及第 第一及第 儸磁阻元件 *濟部中喪襻準高興工消t合作杜印# 2.根 t 3 · 根 係 4. 根 薄 根 薄 根 薄 根 第 根 件 根 薄 引 10 . 一 5. 6. 8. 9 . —俚絕緣 據申請專 該類元件 據申講専 以導磁合 據申謫專 膜係以嫌 據申諝專 膜係大約 據申謫專 膜係與該 據申請專 二個磁阻 據申請專 毎僩係大 據申請専 膜係對該 與該類磁 種用Μ記 二個磁 二個反 上; 靥•置 利範圃 係放置 利範麵 金製成 利範圔 錳合金 利範围 100至 利範圃 類磁阻 利範圃 元件之 利範園 約100 利範麵 類磁阻 性介霣 錄及讀 阻元件; 嫌磁薄膜,分刖沈積在該第一及第二 於該第一及第二個磁阻元件間。 第1項之感澜磁頭,包括软磁遮蔽物 與該類遮蔽物相鄰。 第2項之感測磁頭•其中該類遮蔽-物 ,每個遮蔽物係大約2 . 5微米厚。. 第1項之感測磁頭*其中該類反嫌磁 製成》 第4項之感测磁頭•其中該類反鏹磁 300埃厚。 第1項之感测磁頭,其中該類反鐵磁 元件共同延伸。 第1項之感測磁頭*其中該類第一及 厚度係幾乎完全相同。 第7項之感測磁頭,其中該類磁阻元 至500埃厚。 第1項之感拥磁頭•其中該類反嫌磁 元件提供交換偏壓磁場,本質上係導 表面垂直。 出磁性介質上之信號之讀磁頭包 -1 〇 - 本紙張尺度適用中國困家標準(CNS)甲4规格(210 X 2D7公釐) (請先閲讀背面之注意事項再塡寫本頁) -裝- 訂· -線. A7 B7 C7 · D7_ 六、申請專利範因 含: 一個磁阻感拥磁頭|具有多僩間隔開來之磁阻姐件· Μ及多個沈積在該類磁阻構成分子上之反嫌磁姐件; 一個形成於該感測頭上之感if寫入磁頭。 11.根據申請專利範圃第10項之讀/寫磁頭,其中該類構成 分子係為薄膜層。 (請先閱讀背面之注意事項再蜞寫本頁) —裝. 訂. .線. 經濟部中央標準局貝工消费合作杜印製 本紙張尺度適用中Β國家櫺準(CNS)甲4规格(210 X 297公釐)
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Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0721848B2 (ja) * | 1987-02-17 | 1995-03-08 | シーゲイト テクノロジー インターナショナル | 磁気抵抗センサ及びその製造方法 |
US4881143A (en) * | 1988-01-19 | 1989-11-14 | Hewlett-Packard Company | Compensated magneto-resistive read head |
FR2648942B1 (fr) * | 1989-06-27 | 1995-08-11 | Thomson Csf | Capteur a effet magnetoresistif |
US5084794A (en) * | 1990-03-29 | 1992-01-28 | Eastman Kodak Company | Shorted dual element magnetoresistive reproduce head exhibiting high density signal amplification |
US5132859A (en) * | 1990-08-23 | 1992-07-21 | International Business Machines Corporation | Thin film structures for magnetic recording heads |
-
1992
- 1992-11-16 US US07/976,536 patent/US5309305A/en not_active Expired - Lifetime
-
1993
- 1993-10-05 TW TW082108229A patent/TW305995B/zh active
- 1993-11-10 JP JP5280945A patent/JPH06215334A/ja active Pending
- 1993-11-11 EP EP93118291A patent/EP0598342B1/en not_active Expired - Lifetime
- 1993-11-11 KR KR1019930023948A patent/KR940012244A/ko active IP Right Grant
- 1993-11-11 DE DE69318804T patent/DE69318804T2/de not_active Expired - Fee Related
- 1993-11-15 CN CN93114800A patent/CN1087194A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH06215334A (ja) | 1994-08-05 |
EP0598342B1 (en) | 1998-05-27 |
CN1087194A (zh) | 1994-05-25 |
DE69318804T2 (de) | 1998-09-24 |
EP0598342A1 (en) | 1994-05-25 |
KR940012244A (ko) | 1994-06-23 |
US5309305A (en) | 1994-05-03 |
DE69318804D1 (de) | 1998-07-02 |
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