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US4926151A Expired / Lapsed US ⏱️ 0.0 years remaining

Chip-type coil element

Assignee: Murata Manufacturing Co Ltd
•
Filing: 1988-12-21
•
Granted: 1990-05-15
•
Expires: 2008-12-21
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Abstract

Abstract A coil (33, 33a) is wound on a bobbin (22, 22a), one flange (24, 24a) of which has an end surface provided with a central projection (26, 26a) on its center and first and second end projections (27, 27a; 28, 28a) on its opposite end portions respectively, thereby to define first and second cavities (29, 29a; 30, 30a). First and second electrodes (31, 31a; 32, 32a) are provided to extend from the first and second end portions of the flange toward its side surface. First and second terminals (34, 34a; 35, 35a) of the coil are respectively received in the first and second cavities, which in turn are filled with solder members (36, 36a; 37, 37a) to electrically connect the first and second terminals to the first and second electrodes respectively. The first and second end projections are adapted to reduce the volume of solder required for mounting the chip-type coil element as well as to substantially prevent the coil element from inclination, thereby to prevent a tombstoning phenomenon.

Inventors

  • 👤 Tetsuya Morinaga

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 12:37
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3421; H05K3/3426; H01; H01F; H01F17/00; H01F17/04; H01F17/045; H01F27/00; H01F27/28; H01F27/29; H01F27/292; Y; Y02; Y02P; Y02P70/00; Y02P70/50

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 152 words
A chip-type coil element comprising: a bobbin having a core and first and second flanges provided on end portions of said core respectively, said first flange having an end surface extending perpendicularly to the longitudinal direction of said core and a side surface extending parallel to said longitudinal direction, said end surface of said first flange being provided with a central projection on its center and first and second end projections on its opposite end portions respectively, thereby to define first and second cavities between said central projection and said first and second end projections respectively; a coil being wound on said core and having first and second terminals; and first and second electrodes provided to extend from said first and second end projections toward said side surface; said first and second terminals being received in said first and second cavities to be electrically connected to said first and second electrodes respectively.
Claim 2
Dependent Claim 152 words
A chip-type coil element comprising: a bobbin having a core and first and second flanges provided on end portions of said core respectively, said first flange having an end surface extending perpendicularly to the longitudinal direction of said core and a side surface extending parallel to said longitudinal direction, said end surface of said first flange being provided with a central projection on its center and first and second end projections on its opposite end portions respectively, thereby to define first and second cavities between said central projection and said first and second end projections respectively; a coil being wound on said core and having first and second terminals; and first and second electrodes provided to extend from said first and second end projections toward said side surface; said first and second terminals being received in said first and second cavities to be electrically connected to said first and second electrodes respectively.
Claim 3
Dependent Claim 28 words
A chip-type coil element in accordance with claim 1, wherein wall surfaces are provided defining said first and second cavities respectively, said electrodes extending toward said wall surfaces.
Claim 4
Dependent Claim 27 words
A chip-type coil element in accordance with claim 2, wherein said first and second cavities are filled with solder members while receiving said first and second terminals.
Claim 5
Dependent Claim 22 words
A chip-type coil element in accordance with claim 3, wherein said end surface of said first flange provides a substantially flat plane.
Claim 6
Dependent Claim 19 words
A chip-type coil element in accordance with claim 1, wherein said first and second end projections have rounded faces.

References Cited (Backward Citations)

US1517770A Cited
DE1814282A1 Cited
US3824518A Cited
US4245207A Cited
US4314221A Cited
US4696100A Cited
US4769900A Cited
US4801912A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-05-14 1993-11-13 1994-05-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-05-14 1997-11-13 1998-05-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-05-14 2001-11-13 2002-05-15 $7700.00 Window Closed / Lapsed

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