公开(公告)号：WO1982001615A1

公开(公告)日：1982-05-13

申请号：PCT/US1981001375

申请日：1981-10-13

Applicant: NORTRONICS CO INC

Inventor： NORTRONICS CO INC ,  HEINZ JOHN E ,  ALBRECHT M GRANT

IPC: G11B05/12

CPC classification number: G11B5/31

Abstract: Transducteur magnetique a film mince (14) comprenant un premier noyau et un second noyau (16, 17) deposes sur un substrat (11). Chaque noyau presente une partie frontale (16a, 17a), une partie arriere (16b, 17b) et des parties laterales (16c, 17c). Les parties frontales sont separees par un espaceur (18) pour former un entrefer transducteur (18a), les parties laterales etant placees sur les cotes opposes de l'entrefer. Une bobine (21) est deposee autour des parties arrieres, plusieurs de ses tours (21a, 21b, 21c) etant interconnectes. Dans une forme de mise en oeuvre preferee les noyaux (116, 117) presentent deux parties laterales (116a, 116c, 117a, 117c), chaque noyau presentant une discontinuite (150, 152) sur les cotes opposes de l'entrefer transducteur. Les parties frontales comprennent une partie incurvee (116d, 117d) et des terminaisons (170, 172) afin de produire un champ de densite de flux uniforme dans l'entrefer (154).

公开(公告)号：WO1983001142A1

公开(公告)日：1983-03-31

申请号：PCT/HU1982000046

申请日：1982-09-15

Applicant: KÖZPONTI VALTO- ÉS HITELBANK RT ,  VASS, László ,  TICHY, Géza

Inventor： KÖZPONTI VALTO- ÉS HITELBANK RT

IPC: G11B05/12

CPC classification number: G11B5/03 ,  G11B5/2658

Abstract: Method for recording information on magnetic tape, and a head for recording information on, and reproducing information from magnetic tape. The essence of the invention is that there are two airgaps (3, 4) in the direction of movement of the magnetic tape, provide with separate magnetic circuits (1, 2), and there is a magnetic coupling between the two airgaps (3, 4) of different width. During recording, a magnetic bias field is induced in the first airgap, whereas in the second one a magnetic field, varying at the frequency of the information to be recorded, is induced. By way of using the proposed method and head the quality of recordings, particularly of the tape-recorded recordings may be significantly improved, retaining the quality of playback, and the manufacturing process of the head is simpler than that of the known heads. Implementing the method and the head, the electronic circuits for recording and playback may be simplified.

Abstract translation: 用于在磁带上记录信息的方法，以及用于在磁带上记录信息和再现信息的磁头。 本发明的实质在于磁带移动方向有两个气隙（3,4），提供分开的磁路（1,2），并且两个气隙（3， 4）不同宽度。 在记录期间，在第一气隙中感应出磁偏置场，而在第二气隙中，产生在待记录信息的频率上变化的磁场。 通过使用所提出的方法和提高记录质量，特别是带录音的记录可以显着提高，保持回放的质量，并且头的制造过程比已知头的简单。 实现该方法和头部，可以简化用于记录和重放的电子电路。

公开(公告)号：WO1982002790A1

公开(公告)日：1982-08-19

申请号：PCT/JP1982000035

申请日：1982-02-05

Applicant: OHTSUBO AKIO

IPC: G11B05/12

CPC classification number: G11B5/1278

Abstract: Dans une tete magnetique a un seul pole du type a enregistrement vertical un noyau en forme de pilier (12) est forme de telle sorte que, a la surface (16) en contact avec un support (21), le bord (15) cote entree du support ne soit pas parallele au bord (14) cote sortie du support d'une longueur egale a plusieurs fois la longueur d'onde de travail (Alpha). Le noyau en forme de pilier (12) possede une forme de pilier trapezoidal. L'effet d'azimut au moment de la reproduction permet d'augmenter l'epaisseur moyenne du noyau (12) dans le sens d'avance (v) du support sans nuire a la resolution de la reproduction, de sorte que le rendement de transfert du flux magnetique entre le sommet (16) du noyau et sa partie d'enroulement de la bobine est augmente, ce qui permet l'enregistrement et la reproduction de ce cote du support (21). En particulier, en utilisant un support en bande, on place un materiau magnetique souple (12b) avec une magnetisation de saturation plus elevee, par evaporation a vide, sur la paroi laterale du noyau en forme de pilier (12) sur son cote de sortie du support de maniere a reduire la distribution du champ magnetique d'enregistrement vertical avec, comme resultat, un meilleur rendement d'enregistrement.

公开(公告)号：EP0107443A3

公开(公告)日：1986-03-26

申请号：EP83306171

申请日：1983-10-12

Applicant: HITACHI, LTD.

Inventor： Nakamura, Hitoshi ,  Shiiki, Kazuo ,  Yuito, Isamu ,  Shiroishi, Yoshiro ,  Fujiwara, Hideo ,  Shinagawa, Kiminari ,  Iijima, Akemi

IPC: G11B05/12

CPC classification number: G11B5/1278

Abstract: A magnetic recording and reproducing thin film head has a lower magnetic layer (11) on a flat nonmagnetic substrate 10. This magnetic layer (11) is used as the main magnetic pole of the head. A first insulator layer (12) is formed on the main magnetic pole and a coil (13) and a second insulator layer (14) are dis-posed on the first insulator layer (12). An upper magnetic layer (15) is formed on the second insulator layer (14) with a part contacting the first insulator layer (12) and a part contacting the lower magnetic layer (11). The upper magnetic layer (15) forms the auxiliary magnetic pole. The resulting head has excellent magnetic characteristics and is easy to fabricate.

公开(公告)号：EP0099124A3

公开(公告)日：1986-03-26

申请号：EP83106883

申请日：1983-07-13

Applicant: HITACHI, LTD.

Inventor： Shiiki, Kazuo ,  Shiroishi, Yoshihiro ,  Yuito, Isamu ,  Shinagawa, Kiminari ,  Uesaka, Yasutaro ,  Fujiwara, Hideo ,  Nakamura, Hitoshi

IPC: G11B05/00 ,  G11B05/12 ,  G11B05/62

CPC classification number: G11B5/1278 ,  G11B5/00 ,  G11B5/127 ,  G11B5/62

Abstract: A magnetic recording and reproducing system comprising i) a magnetic head (3) including a first magnetic pole (35) whose saturation flux density (Bs 1 ) is at least 7 kG and whose edge face (Tp,) is 0.15 - 0.5 µm thick, and a second magnetic pole (32) which lies on the same side as the first magnetic pole (35) with respect to a recording medium (4) and whose edge face (Tp 2 ) is at least 10 times thicker than that of the first magnetic pole (35), and ii) the perpendicular magnetic recording medium (4) including a perpendicular magnetization layer (43) which has a coercive force (Hc 1 ) of 250 - 60 0 Oe. in a direction perpendicular to a plane thereof and which is 0.1 - 0.5 µm thick.

公开(公告)号：EP0110680A3

公开(公告)日：1985-12-18

申请号：EP83307180

申请日：1983-11-24

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Ochi, Atsuo ,  Hashima, Akio ,  Tomita, Masao

IPC: G11B05/52 ,  G11B05/008 ,  G11B05/14 ,  G11B05/12 ,  G11B05/02

CPC classification number: G11B15/14

Abstract: A magnetic recording/reproducing apparatus comprises a ' rotor drum (11) mounting thereon a plurality of rotary magnetic heads (1a, 1b, 1c, 1d), a plurality of reproducing amplifiers (5a-5d), recording/reproducing mode switching circuits (4a-4d), head selection circuits (6, 7), control circuits (21, 22) and a DC voltage source (23). The control signal circuit (21, 22) and the DC voltage source (23) receive a control signal transmitted from a stator drum through a rotary transformer (17, 18b) and produce signals for controlling the mode switching circuits (4a-4d) and the head selecting circuits (6, 7) and a DC voltage for energizing all the circuits on the rotor drum, respectively.

公开(公告)号：EP0105720A3

公开(公告)日：1985-11-27

申请号：EP83305851

申请日：1983-09-28

Applicant: AMPEX CORPORATION

Inventor： Latimer, Stanley M. ,  Orton, Gregory A.

IPC: G11B05/12 ,  G11B05/16 ,  G11B05/28 ,  G11B05/27 ,  G11B05/42

CPC classification number: G11B5/232 ,  G11B5/105 ,  G11B5/1272 ,  G11B5/1475 ,  G11B5/2651 ,  G11B5/295 ,  Y10T29/49055

Abstract: A magnetic transducer assembly having separate core portions (12, 13) with keyways (17,18) provided therein. The core portions are assembled to form a substantially closed magnetic circuit defining a transducing gap (35). The keyways form recesses which are contiguous with a transducer inner space provided by the assembled cores. The inner space and recesses are filled with a nonmagnetic bonding material. The resulting bond improves the mechanical coupling between the core portions.

公开(公告)号：EP0081239A3

公开(公告)日：1985-09-25

申请号：EP82111354

申请日：1982-12-08

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Sakakima, Hiroshi ,  Satomi, Mitsuo ,  Yanagiuchi, Yukihiro ,  Senno, Harufumi

IPC: G11B05/12

CPC classification number: G11B5/127 ,  G11B5/3106

Abstract: The invention provides a magnetic head having a core which includes a thin amorphous alloy film having a composition of Co a M b T c X d , for 70≤ a ≤ 95,0 ≤b ≤ 20,3 ≤ c ≤20,0≤d

公开(公告)号：EP0032230A3

公开(公告)日：1982-01-13

申请号：EP80108128

申请日：1980-12-22

Applicant: Siemens Aktiengesellschaft

Inventor： Kayser, Wolfgang

IPC: G11B05/12 ,  G11B05/42

CPC classification number: G11B5/1871 ,  G11B5/31 ,  G11B5/3103 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3176

Abstract: There is disclosed an integrated magnetic transducer for recording and reproducing high frequency electrical signals on a magnetic recording medium and a method of manufacturing the transducer. A silicon substrate has a preferably V-shaped groove with two sides and two ends extending through the silicon substrate. Over the sides of the V-shaped groove a layer of magnetically inductive material is disposed which forms the pole pieces of the transducer. An electrically conductive layer covers this layer of magnetically inductive material and fills the space within the V-shaped groove. Another layer of magnetically inductive material is disposed over the electrically conductive layer. This second magnetically inductive layer completes the magnetic circuit. Means for contacting the electrically conductive layer at opposite ends of the V-shaped groove supply the electrically conductive layer with electrical current. The converging layers of said magnetically inductive material forming the pole pieces of the magnetic transducer are spaced apart at the apex of the V-shaped groove to form a transducer gap.

Abstract translation: 公开了一种用于在磁记录介质上记录和再现高频电信号的集成磁换能器及其制造方法。 硅衬底具有优选的V形槽，其两侧和两端延伸穿过硅衬底。 在V形槽的侧面上设置一层磁感应材料，其形成换能器的极片。 导电层覆盖该磁感应材料层并填充V形槽内的空间。 另外一层磁感应材料设置在导电层上。 该第二磁感应层完成磁路。 用于在V形槽的相对端处接触导电层的装置为导电层提供电流。 形成磁换能器的极片的所述磁感应材料的会聚层在V形槽的顶点处间隔开以形成换能器间隙。

公开(公告)号：WO1985000070A1

公开(公告)日：1985-01-03

申请号：PCT/US1984000753

申请日：1984-05-18

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  GRIFFITH, Neil, J.

IPC: G11B05/12

CPC classification number: G11B5/127 ,  G11B5/17 ,  G11B5/33 ,  G11B5/3967

Abstract: The invention provides that if a "shorted" electrically conductive turn (18) - deposited on a magnetic substrate (10) - is employed to sense recorded signal flux, then the underlying substrate will efficiently support flux induced about the shorted turn ... and such induced flux will correspond proportionately to the recorded signal flux. In accordance with the invention, an MR element (22) is so situated that it senses induced flux about the shorted turn at a location thereof that is remote from the medium whose signal flux is to be reproduced.