CA960356A - Electromagnetic transducers - Google Patents
Electromagnetic transducersInfo
- Publication number
- CA960356A CA960356A CA147,826A CA147826A CA960356A CA 960356 A CA960356 A CA 960356A CA 147826 A CA147826 A CA 147826A CA 960356 A CA960356 A CA 960356A
- Authority
- CA
- Canada
- Prior art keywords
- electromagnetic transducers
- transducers
- electromagnetic
- 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
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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
- G11B5/2452—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track where the dimensions of the effective gap are controlled
-
- 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
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
-
- 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
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of layers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3931671 | 1971-08-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA960356A true CA960356A (en) | 1974-12-31 |
Family
ID=10408905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA147,826A Expired CA960356A (en) | 1971-08-21 | 1972-07-25 | Electromagnetic transducers |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS4830412A (en) |
CA (1) | CA960356A (en) |
DE (1) | DE2233453A1 (en) |
FR (1) | FR2150335B1 (en) |
GB (1) | GB1344890A (en) |
IT (1) | IT963420B (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2480014A1 (en) * | 1980-04-02 | 1981-10-09 | Cii Honeywell Bull | MAGNETIC TRANSDUCER FOR READING AND / OR RECORDING INFORMATION CONTAINED ON A MAGNETIC MEDIUM |
FR2480015A1 (en) * | 1980-04-02 | 1981-10-09 | Cii Honeywell Bull | MAGNETIC MAGNETIC TRANSDUCER WITH HIGH VARIABLE DIMENSION FOR READING AND WRITING INFORMATION CONTAINED IN A MAGNETIC MEDIUM |
FR2489570A1 (en) * | 1980-08-27 | 1982-03-05 | Cii Honeywell Bull | INTEGRATED MAGNETIC TRANSDUCER |
CA1189969A (en) * | 1982-05-26 | 1985-07-02 | Gilbert D. Springer | Differential-permeability field-concentrating magnetic writing head |
JP2563597B2 (en) * | 1989-08-04 | 1996-12-11 | 松下電器産業株式会社 | Composite thin film magnetic head |
US5097372A (en) * | 1989-08-04 | 1992-03-17 | Matsushita Electric Industrial Co., Ltd. | Thin film magnetic head with wide recording area and narrow reproducing area |
JPH0383213A (en) * | 1989-08-24 | 1991-04-09 | Matsushita Electric Ind Co Ltd | Thin film magnetic head |
US6771462B1 (en) | 1999-09-20 | 2004-08-03 | Seagate Technology Llc | Perpendicular recording head including concave tip |
US6865056B1 (en) | 1999-10-05 | 2005-03-08 | Seagate Technology Llc | Longitudinal magnetic recording heads with variable-length gaps |
DE60006984D1 (en) * | 1999-10-05 | 2004-01-15 | Seagate Technology Llc | MAGNETIC HEADS WITH VARIABLE COLUMN FOR LONGITUDINAL RECORDING |
US6898053B1 (en) | 1999-10-26 | 2005-05-24 | Seagate Technology Llc | Perpendicular recording head with trackwidth defined by plating thickness |
US6560069B1 (en) | 1999-11-29 | 2003-05-06 | Seagate Technology, Llc | Perpendicular recording head defining the trackwidth by material deposition thickness |
US6707642B1 (en) | 2000-02-04 | 2004-03-16 | Seagate Technology Llc | Longitudinal magnetic recording head with reduced side fringing |
US6693768B1 (en) | 2000-03-15 | 2004-02-17 | Seagate Technology Llc | Perpendicular magnetic recording head having a flux focusing main pole |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2963690A (en) * | 1957-10-14 | 1960-12-06 | Ibm | Magnetic transducer |
US3171107A (en) * | 1961-07-03 | 1965-02-23 | Ibm | Wide-record narrow-read magnetic head |
-
1971
- 1971-08-21 GB GB1344890D patent/GB1344890A/en not_active Expired
-
1972
- 1972-07-07 DE DE19722233453 patent/DE2233453A1/en active Pending
- 1972-07-11 JP JP6876672A patent/JPS4830412A/ja active Pending
- 1972-07-25 CA CA147,826A patent/CA960356A/en not_active Expired
- 1972-07-27 IT IT2748772A patent/IT963420B/en active
- 1972-08-03 FR FR7228656A patent/FR2150335B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1344890A (en) | 1974-01-23 |
FR2150335B1 (en) | 1978-09-29 |
DE2233453A1 (en) | 1973-02-22 |
JPS4830412A (en) | 1973-04-21 |
FR2150335A1 (en) | 1973-04-06 |
IT963420B (en) | 1974-01-10 |
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