EP0199522A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Step-up type magnetic head
Assignee: Panasonic Holdings Corp
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Filing: 1986-04-14
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Granted: —
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Expires: 2006-04-14
Abstract
Abstract A magnetic head integrally assembled with a step-up transformer. The magnetic head portion is formed on a lower substrate (9) by a thin film technology and the number of turns of the signal winding is 1 or a value near 1. The transformer portion mainly comprises a transformer magnetic circuit which is formed by the lower substrate (9) and upper substrate (16,17). A one-turn primary coil (12) of a thin film formed over the lower substrate (9) and a secondary coil (19) by a bulk wire are arranged so as to interlink the transformer portion. The head portion and the transformer portion are arranged very closely. The signal winding and primary coil winding (12) are formed by the same thin film process. The head portion and the transformer portion are densely coupled.
Inventors
- 👤 Kazuo Nakamura
- 👤 Ken Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:47
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/1278; G11B5/17; G11B5/31; G11B5/3109; G11B5/312
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A step-up type magnetic head comprising: a thin film head magnetic circuit (10, 13) formed on a lower substrate (9); a transformer magnetic circuit which includes in at least a part thereof magnetic thin films (11, 14) formed on said lower substrate (9) and which is constituted together with an upper substrate (17); a thin film coil (12) of a closed loop formed over said lower substrate (9) to interlink both of said head magnetic circuit and said transformer magnetic circuit; and a transformer secondary coil (19) interlinking said transformer magnetic circuit; wherein said secondary coil (19) is divided into a first portion wound around the upper substrate (17) and a second portion wound around the lower substrate (9), and said secondary coil (l9) is of a balance winding constitution made of a bulk winding.
Claim 2
Dependent Claim
135 words
A step-up type magnetic head comprising: a thin film head magnetic circuit (10, 13) formed on a lower substrate (9); a transformer magnetic circuit which includes in at least a part thereof magnetic thin films (11, 14) formed on said lower substrate (9) and which is constituted together with an upper substrate (17); a thin film coil (12) of a closed loop formed over said lower substrate (9) to interlink both of said head magnetic circuit and said transformer magnetic circuit; and a transformer secondary coil (19) interlinking said transformer magnetic circuit; wherein said secondary coil (19) is divided into a first portion wound around the upper substrate (17) and a second portion wound around the lower substrate (9), and said secondary coil (l9) is of a balance winding constitution made of a bulk winding.
Claim 3
Dependent Claim
33 words
A step-up type magnetic head according to claim 1, wherein said thin film coil (12) is constituted to interlink any of said head magnetic circuit and said transformer magnetic circuit by one turn.
Claim 4
Dependent Claim
36 words
A step-up type magnetic head according to claim 1, wherein at least one of said upper substrate (17) and said lower substrate (9) includes a bulk magnetic portion forming a part of said transformer magnetic circuit.
Claim 5
Dependent Claim
36 words
A step-up type magnetic head according to claim 1, wherein at least one of said upper substrate (17) and said lower substrate (9) includes magnetic thin films which forms a part of the transformer magnetic circuit.
Claim 6
Dependent Claim
96 words
A step-up type magnetic head comprising: a thin film head magnetic circuit (10, 13) formed on a lower substrate (9; 20); a transformer magnetic circuit which includes in at least a part thereof magnetic thin films (11; 22) formed on said lower substrate (9; 20) and which is constituted together with an upper substrate (17; 21); a thin film coil (12) of a closed loop formed over said lower substrate (9; 20) to interlink both of said head magnetic circuit and said transformer magnetic circuit; and a transformer secondary coil (19) interlinking said transformer magnetic circuit.
Claim 7
Dependent Claim
96 words
A step-up type magnetic head comprising: a thin film head magnetic circuit (10, 13) formed on a lower substrate (9; 20); a transformer magnetic circuit which includes in at least a part thereof magnetic thin films (11; 22) formed on said lower substrate (9; 20) and which is constituted together with an upper substrate (17; 21); a thin film coil (12) of a closed loop formed over said lower substrate (9; 20) to interlink both of said head magnetic circuit and said transformer magnetic circuit; and a transformer secondary coil (19) interlinking said transformer magnetic circuit.
References Cited (Backward Citations)
No citation records indexed.
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