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US5850682A
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Method of manufacturing chip-type common mode choke coil
Assignee: Murata Manufacturing Co Ltd
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Filing: 1996-07-09
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Granted: 1998-12-22
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Expires: 2016-07-09
Abstract
Abstract In a chip type common mode choke coil, a plurality of non-magnetic sheets on which conductor lines are formed are laminated one on another to form a non-magnetic member, and the conductor lines are connected to form primary and secondary coils inside the non-magnetic member, and a pair of magnetic layers are formed on the upper and lower surface of the non-magnetic member, and magnetic cores are arranged substantially at the centers of the loops of the coils in such a manner that they penetrate the non-magnetic member and are connected to the pair of magnetic layers, whereby a closed magnetic path crossing the primary and secondary coils is formed.
Inventors
- 👤 Tomoaki Ushiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:33
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/041; H01F41/043; H01F17/00; H01F17/0006; H01F17/0013; H01F38/00; H01F38/48; H01F41/046; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
122 words
A method for manufacturing a chip type common mode choke coil, said method comprising the steps of: (a) forming a stack of green sheets including: (1) a lamination including a plurality of non-magnetic sheets each having conductive lines printed thereon, said conductive lines being coupled together and having a shape which will form primary and secondary coils having respective center loops; and (2) first and second magnetic layers located on a top and a bottom surface of said lamination, respectively, and extending over said center loops; (b) forming core receiving holes through both said lamination and said magnetic layers in the area of said center loops after said stack has been formed; and (c) inserting magnetic material into said core receiving holes.
Claim 2
Independent Claim
122 words
A method for manufacturing a chip type common mode choke coil, said method comprising the steps of: (a) forming a stack of green sheets including: (1) a lamination including a plurality of non-magnetic sheets each having conductive lines printed thereon, said conductive lines being coupled together and having a shape which will form primary and secondary coils having respective center loops; and (2) first and second magnetic layers located on a top and a bottom surface of said lamination, respectively, and extending over said center loops; (b) forming core receiving holes through both said lamination and said magnetic layers in the area of said center loops after said stack has been formed; and (c) inserting magnetic material into said core receiving holes.
Claim 3
Dependent Claim
16 words
A method according to claim 1, wherein said forming step creates said core receiving holes simultaneously.
Claim 4
Dependent Claim
20 words
A method according to claim 1, wherein said forming step forms each respective core receiving hole in a single operation.
Claim 5
Dependent Claim
22 words
A method according to claim 1, wherein said inserting step comprises the step of inserting magnetic paste into said core receiving holes.
Claim 6
Dependent Claim
21 words
A method according to claim 4, wherein said magnetic paste is inserted into said core receiving holes using a squeegee method.
Claim 7
Dependent Claim
32 words
A method according to claim 4, wherein said step of inserting magnetic paste into said core receiving holes is carried out while a partial vacuum is applied to said core receiving holes.
Claim 8
Dependent Claim
27 words
A method according to claim 1, wherein each of said non-magnetic sheets is generally planar in shape and is aligned parallel to the other said non-magnetic sheets.
Claim 9
Dependent Claim
26 words
A method according to claim 7, wherein said core receiving holes are formed along respective axes which lie perpendicular to said planes of said non-magnetic sheets.
Claim 10
Dependent Claim
38 words
A method according to claim 8, wherein said magnetic layers are respective laminates, each including a plurality of magnetic sheets, each of said magnetic sheets being generally planar in shape and being aligned parallel to said non-magnetic sheets.
Claim 11
Dependent Claim
20 words
A method according to claim 1, wherein said magnetic layers are respective laminates, each including a plurality of magnetic sheets.
Claim 12
Dependent Claim
19 words
A method according to claim 1, wherein said inserting step is carried out after said forming step is completed.
Claim 13
Dependent Claim
19 words
A method according to claim 1, wherein said inserting step is carried out substantially simultaneously with said forming step.
Claim 14
Dependent Claim
33 words
A method according to claim 12, wherein said inserting step comprises the step of inserting respective plugs of magnetic material into said core receiving holes as said core receiving holes are being formed.
Claim 15
Dependent Claim
67 words
A method according to claim 1, wherein said inserting step comprises the steps of: placing a magnetic member on top of said first magnetic layer in the area of said center loops; and using a punch to cut into both said magnetic member and said stack of green sheets to substantially simultaneously form said core receiving holes and place said magnetic material into said core receiving holes.
Claim 16
Independent Claim
160 words
A method for manufacturing a chip type common mode choke coil, said method comprising the steps of: (a) forming a stack of green sheets including: (1) a lamination including a plurality of non-magnetic sheets each having conductive lines printed thereon, said conductive lines being coupled together and having a shape which will form primary and secondary coils having respective center loops; and (2) first and second magnetic layers located on a top and a bottom surface of said lamination, respectively, and extending over said center loops; (b) placing a magnetic member on the top of said first magnetic layer and extending over the area of said center loops to form an assembly including said stack of green sheets and said magnetic member; and (c) using a punch assembly to substantially simultaneously: (1) form core receiving holes through said assembly in the area of said center loops; and (2) insert magnetic material from said magnetic member into said core receiving holes.
Claim 17
Independent Claim
160 words
A method for manufacturing a chip type common mode choke coil, said method comprising the steps of: (a) forming a stack of green sheets including: (1) a lamination including a plurality of non-magnetic sheets each having conductive lines printed thereon, said conductive lines being coupled together and having a shape which will form primary and secondary coils having respective center loops; and (2) first and second magnetic layers located on a top and a bottom surface of said lamination, respectively, and extending over said center loops; (b) placing a magnetic member on the top of said first magnetic layer and extending over the area of said center loops to form an assembly including said stack of green sheets and said magnetic member; and (c) using a punch assembly to substantially simultaneously: (1) form core receiving holes through said assembly in the area of said center loops; and (2) insert magnetic material from said magnetic member into said core receiving holes.
Claim 18
Dependent Claim
26 words
A method according to claim 15, wherein said punch assembly includes a pair of punches, each punch being used to form a respective core receiving hole.
Claim 19
Dependent Claim
27 words
A method according to claim 15, wherein each of said non-magnetic sheets is generally planar in shape and is aligned parallel to the other said non-magnetic sheets.
Claim 20
Dependent Claim
26 words
A method according to claim 17, wherein said core receiving holes are formed along respective axes which lie perpendicular to said planes of said non-magnetic sheets.
Claim 21
Dependent Claim
38 words
A method according to claim 18, wherein said magnetic layers are respective laminates, each including a plurality of magnetic sheets, each of said magnetic sheets being generally planar in shape and being aligned parallel to said non-magnetic sheets.
Claim 22
Dependent Claim
20 words
A method according to claim 15, wherein said magnetic layers are respective laminates, each including a plurality of magnetic sheets.
References Cited (Backward Citations)
US5479695A
Cited
US5386206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-21 | 2002-06-22 | 2002-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-21 | 2006-06-22 | 2006-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-21 | 2010-06-22 | 2010-12-22 | $7700.00 | Window Closed / Lapsed |