GB2355343A - Printed circuit board having a built-in inductive device - Google Patents
Printed circuit board having a built-in inductive device Download PDFInfo
- Publication number
- GB2355343A GB2355343A GB0024401A GB0024401A GB2355343A GB 2355343 A GB2355343 A GB 2355343A GB 0024401 A GB0024401 A GB 0024401A GB 0024401 A GB0024401 A GB 0024401A GB 2355343 A GB2355343 A GB 2355343A
- Authority
- GB
- United Kingdom
- Prior art keywords
- printed circuit
- circuit board
- core
- receiving holes
- inductor
- 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.)
- Withdrawn
Links
- 230000001939 inductive effect Effects 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 7
- 230000006698 induction Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/08—Magnetic details
- H05K2201/083—Magnetic materials
- H05K2201/086—Magnetic materials for inductive purposes, e.g. printed inductor with ferrite core
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09063—Holes or slots in insulating substrate not used for electrical connections
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
- Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
Abstract
A printed circuit board having a built-in electronic induction device including a transformer or an inductor, and a method of manufacturing such. A printed circuit board comprises a pair of core receiving holes perforated on predetermined portions thereof, and a spiral pattern, formed with a conductive material around a center of the core receiving holes, the patterns for performing a role of a coil of the electronic induction device mounted on the printed circuit board.
Description
2355343 PRINTED CIRCUIT BOARD The present invention relates to a printed
circuit board, and more particularly to a printed circuit board having an inductive device, such as a transformer. The present invention also relates to a method of manufacturing such a printed circuit board. The present invention further relates to an electronic induction device manufactured by such a method.
In general, a printed circuit board built of electronic components may include a transformer for receiving alternating current and providing a transformed output power using the principles of electrical induction. An inductor may be present for deriving a value representing the strength of variations in magnetic flux around or through electrically conductive wires or coils.
The construction of a prior art transformer mounted on a conventional printed circuit board will be explained with reference to Figs. IA through ID. Fig.1 shows the construction of a prior art transformer, wherein Fig.lA is a front view, Fig.113 is a cross sectional view, Fig.lC is a top view, and Fig.ID is a bottom view, of the prior art transformer, respectively.
The conventional transformer 12 comprises a bobbin 13, a coil 14 wound on the bobbin 13, a plurality of connecting pins 15, mounted on a lower part of the bobbin 13 and electrically connected to a respective terminal, and an upper and lower core 16 and 17 surrounding the overall outer circumference of the bobbin 13.
2 If the transformer 12 is mounted on a printed circuit board I I as shown in Fig.2, the plurality of connecting pins 15 on the lower part of the bobbin 13 are inserted or soldered into holes I I a formed on the printed circuit board 11.
The construction of a prior art inductor mounted on a conventional printed circuit board will be explained with reference to Figs.3A through 3D. Fig.3 shows the construction of a prior art inductor, wherein Fig.3A is a front view, Fig.313 is a cross sectional view, Fig.3C is a top view, and Fig.31) is a bottom view, of the prior art inductor, respectively. 10 As shown in Figs.3A through 3D, the conventional inductor 22 comprises a bobbin 23, a coil 24 wound on the bobbin 23, a plurality of connecting pins 25 deposited on a lower part of the bobbin 23 and electrically connected with respective terminals of the coil 24, and cores 27 and 28 having projections 29 15 which are inserted into openings 26 formed on both ends of the bobbin 23. If the inductor 22 is mounted on a printed circuit board 21 as shown in Fig-5, the plurality of connecting pins 25 deposited on the lower part of the bobbin are inserted or soldered into holes 2 1 a formed on the printed circuit board 2 1. 20 To mount the conventional transformer 12 or inductor 22 on the printed circuit board I I or 21, the transformer 12 or the inductor 22 are manufactured separately and then mounted on the printed circuit board 11 or 2 1. Further, to manufacture the transformer 12 or the inductor 22, the coil 14 or 24 is wound 25 on the bobbin 13 or 23. A winding machine is necessary for winding the coil 14 or 24 on the bobbin 13 or 23.
3 After winding the coil 14 or 24 on the bobbin 13 or 23, each respective terminal of the coil 14 or 24 is electrically connected to a corresponding connecting pin or 25 deposited on the lower part of the bobbin 13 or 23. There are many process steps in manufacturing the transformer 12 or the inductor 22, making them costly. Further, the prior art cannot be easily used in electronic products having space restrictions, e.g., liquid crystal displays.
An object of the present invention is to provide a printed circuit board on which an inductive device, e.g., a transformer or an inductor, is easily mounted, so as to solve the problems and disadvantages of the prior art.
Another object of the present invention is to provide a printed circuit board having a transformer or an inductor as part of an electron-inducing element.
A further object of the present invention is to provide a method of manufacturing a printed circuit board having an inductive device such as a built-in transformer or inductor. A still further object of the present invention is to provide an electrically 20 inductive device which is easily mounted on a printed circuit board. To achieve the objects, according to one aspect of the present invention, there is provided a printed circuit board for electric equipment comprising a pair of core receiving holes perforated at predetermined positions, and a spiral pattern of a 25 conductive material each formed around a center of the core receiving hole on the printed circuit board. The spiral pattern is functionally a coil of an electronic induction device on the printed circuit board.
4 According to another aspect of the present invention, there is provided a method of manufacturing a printed circuit board comprising the steps of. perforating core receiving holes at predetennined positions of the printed circuit board; forming a spiral pattern of a conductive material around the core receiving holes; inserting arms of an upper core into the core receiving holes of the printed circuit board; and connecting a lower core to the arm of the upper core projected downward from the printed circuit board.
The spiral pattern is formed in a closed-circuit of a circle or quadrangle on the printed circuit board. The pattem is formed on one side or both sides of the printed circuit board.
The above objects, other features and advantages of the present invention will become more apparent by the preferred embodiment described with reference to the accompanying drawings, in which:
Fig.6 is an exploded view illustrating a state where a transformer or the inductor is mounted on a printed circuit board according to the present invention; and Fig.7 is a front view of the connected transformer or inductor in Fig.6 The printed circuit board I in accordance with the present invention comprises a pair of core receiving holes 4 formed at predetermined positions and a spiral pattern 5 formed around each of the core receiving holes 4. The spiral pattern 5 formed on the printed circuit board I if made of a thin conductive film and functionally performs the role of the coil in prior art transformers or inductors.
The spiral pattern 5 is in the shape of a circle or rectangle. Further, the patterns can be formed on both sides or one side of the printed circuit board 1.
The printed circuit board comprises an upper core 3 having a pair of arms and a lower core 6 adhered to a lower part of the arms of the upper core 3 by means of glue.
The arms of the upper core 3 extend through the core receiving holes 4 of the printed circuit board. The plate-like lower core 6 is adhered to the free ends of the arms of the upper core 3 projecting through the printed circuit board. The transformer or the inductor 2 mounted on the printed circuit board in 10 accordance with the present invention forms one part of the printed circuit board without necessity of additional bobbins or coils. As stated above when the transformer or the inductor 2 is mounted on the printed circuit board I with other electronic products, the holes 4 for the 15 transformer or the inductor 2 are bored with the appropriate shape and spacing to receive the arms of the core 3 [through the holes 4]. Copper wires are spirally wound or printed around the holes 4 either before or after the holes are actually formed. 20 Then, the arms of the upper core 3 are inserted into the core receiving holes 4 of the printed circuit board. The lower core 6 is glued to the arms of the upper core 3 projecting through the printed circuit so as to create the transformer or the inductor 2. 25 The spiral of each of the wound or printed electrically conductive elements formed on the printed circuit board is terminated either at locations outside the spiral (as shown in Figure 6) or at the internal and external points at which the 6 spiral begins and ends.
As stated above, the transformer or the inductor can be mounted without winding coils being assembled on the printed circuit board as part of the assembly of an electronic products, serving to considerably reduce manufacturing cost or assembling time of the transformer or the inductor.
The foregoing embodiments are merely exemplary and are not to be construed as limiting the present invention. The present teachings can be readily applied to other types of apparatuses. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art without departing from the scope of the present invention.
7
Claims (11)
1. A printed circuit board comprising:
a pair of core receiving holes formed at predetermined positions thereof, and a spiral pattern of a conductive material formed around each hole on the printed circuit board, wherein the spiral pattern is functionally a coil of an electrically inductive device mounted on the printed circuit board.
2. The printed circuit board of claim 1, wherein the spiral pattern is formed in a closed circuit of circular or rectangular shape in a surface of the printed circuit board.
3. The printed circuit board or claim I or 2, wherein the spiral pattern is formed on one side of the printed circuit board.
4. The printed circuit board of claim I or 2, wherein the spiral pattern is formed on both sides of the printed circuit board.
5. A method of manufacturing a printed circuit board having a built-in electrically inductive device, such as a transformer or an inductor, the method comprising the steps of forming core receiving holes at predetermined positions on the printed circuit board; fonning spiral patterns of a conductive material around the core receiving holes; 8 inserting arms of an upper core into the core receiving holes of the printed circuit board; and connecting a lower core to the arms of the upper core projecting through the printed circuit board. 5
6. The method of claim 5, wherein the spiral pattern is formed in a closed circuit of a circular or rectangular shape on the surface of the printed circuit board.
7. The method of claim 5 or 6, wherein the pattern is formed on one side of the printed circuit board.
8. The method of claim 5 or 6, wherein the pattern is formed on both sides of the printed circuit board. 15
9. An electronically inductive device manufactured by the method claimed in any of claims 5 through 8.
10. A printed circuit board comprising a pair of apertures in the board and a 20 spirally formed member of electrically conductive material arranged around each of the apertures on one or both sides of the board.
11. An inductive device including an inductor core having side pieces, and a printed circuit board as claimed in any of claims I to 4 or 10, the side pieces of 25 the core extending through the receiving holes or apertures.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990043474A KR100339563B1 (en) | 1999-10-08 | 1999-10-08 | Electronic parts attachment structure and its mathod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0024401D0 GB0024401D0 (en) | 2000-11-22 |
| GB2355343A true GB2355343A (en) | 2001-04-18 |
Family
ID=19614510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0024401A Withdrawn GB2355343A (en) | 1999-10-08 | 2000-10-05 | Printed circuit board having a built-in inductive device |
Country Status (6)
| Country | Link |
|---|---|
| KR (1) | KR100339563B1 (en) |
| CN (1) | CN1292636A (en) |
| BR (1) | BR0004921A (en) |
| GB (1) | GB2355343A (en) |
| ID (1) | ID28061A (en) |
| MX (1) | MXPA00009775A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7332993B1 (en) | 2007-04-10 | 2008-02-19 | Bose Corporation | Planar transformer having fractional windings |
| US7432793B2 (en) | 2005-12-19 | 2008-10-07 | Bose Corporation | Amplifier output filter having planar inductor |
| DE102012003364A1 (en) * | 2012-02-22 | 2013-08-22 | Phoenix Contact Gmbh & Co. Kg | Planar transformer |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100464095B1 (en) | 2002-08-09 | 2005-01-03 | 삼성전자주식회사 | apparatus for fixing bobbin to printing circuit board for use in transformer |
| US7307502B2 (en) | 2003-07-16 | 2007-12-11 | Marvell World Trade Ltd. | Power inductor with reduced DC current saturation |
| US7023313B2 (en) | 2003-07-16 | 2006-04-04 | Marvell World Trade Ltd. | Power inductor with reduced DC current saturation |
| US7489219B2 (en) | 2003-07-16 | 2009-02-10 | Marvell World Trade Ltd. | Power inductor with reduced DC current saturation |
| US8324872B2 (en) | 2004-03-26 | 2012-12-04 | Marvell World Trade, Ltd. | Voltage regulator with coupled inductors having high coefficient of coupling |
| CN101431868B (en) * | 2008-12-11 | 2012-03-21 | 田先平 | Production method of winding integrated multi-layer PCB |
| US8188829B2 (en) * | 2008-12-26 | 2012-05-29 | Tdk Corporation | Coil substrate structure, substrate holding structure, and switching power supply |
| CN102159037A (en) * | 2011-03-04 | 2011-08-17 | 聚信科技有限公司 | Core burying method for high-current magnetic device and printed circuit board manufacturing method |
| DE102011102484B4 (en) | 2011-05-24 | 2020-03-05 | Jumatech Gmbh | Printed circuit board with molded part and process for its production |
| CN102325429B (en) * | 2011-08-15 | 2016-09-14 | 深圳市核达中远通电源技术有限公司 | A kind of upper and lower magnetic core method of the modular power source that bonds |
| EP2742821B1 (en) * | 2012-12-17 | 2015-09-09 | The Swatch Group Research and Development Ltd. | Method for manufacturing a flexible portable electronic device |
| CN103956250B (en) * | 2014-05-13 | 2017-01-25 | 华为技术有限公司 | Surface pasting type planar magnetic element and module thereof |
| CN104112576A (en) * | 2014-06-25 | 2014-10-22 | 东莞联宝光电科技有限公司 | Ultra-thin transformer |
| CN110351949B (en) * | 2016-02-02 | 2022-04-15 | 景硕科技股份有限公司 | Layer-adding carrier plate structure with magnetic induction coil and soft plate |
| US10256028B2 (en) | 2016-03-31 | 2019-04-09 | Kinsus Interconnect Technology Corp. | Buildup board structure |
| CN109561580B (en) * | 2017-09-27 | 2020-11-24 | 欣兴电子股份有限公司 | Support plate structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201965A (en) * | 1978-06-29 | 1980-05-06 | Rca Corporation | Inductance fabricated on a metal base printed circuit board |
| US4817189A (en) * | 1984-07-07 | 1989-03-28 | Robert Bosch Gmbh | Directional high frequency broadband transformer made by printed circuit technique |
| US4864486A (en) * | 1988-07-29 | 1989-09-05 | International Business Machines Corporation | Plank and frame transformer |
| GB2252208A (en) * | 1991-01-24 | 1992-07-29 | Burr Brown Corp | Hybrid integrated circuit planar transformer |
| GB2299714A (en) * | 1995-04-04 | 1996-10-09 | Nokia Telecommunications Oy | Inductive component |
| WO1997041639A1 (en) * | 1996-04-30 | 1997-11-06 | 3Com Corporation | Isolation and signal filter transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980037987U (en) * | 1996-12-18 | 1998-09-15 | 조희재 | Through Hole Structure of Circuit Board |
-
1999
- 1999-10-08 KR KR1019990043474A patent/KR100339563B1/en not_active IP Right Cessation
-
2000
- 2000-10-05 GB GB0024401A patent/GB2355343A/en not_active Withdrawn
- 2000-10-05 MX MXPA00009775A patent/MXPA00009775A/en unknown
- 2000-10-08 CN CN001297309A patent/CN1292636A/en active Pending
- 2000-10-09 BR BR0004921-2A patent/BR0004921A/en not_active IP Right Cessation
- 2000-10-09 ID IDP20000876A patent/ID28061A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201965A (en) * | 1978-06-29 | 1980-05-06 | Rca Corporation | Inductance fabricated on a metal base printed circuit board |
| US4817189A (en) * | 1984-07-07 | 1989-03-28 | Robert Bosch Gmbh | Directional high frequency broadband transformer made by printed circuit technique |
| US4864486A (en) * | 1988-07-29 | 1989-09-05 | International Business Machines Corporation | Plank and frame transformer |
| GB2252208A (en) * | 1991-01-24 | 1992-07-29 | Burr Brown Corp | Hybrid integrated circuit planar transformer |
| GB2299714A (en) * | 1995-04-04 | 1996-10-09 | Nokia Telecommunications Oy | Inductive component |
| WO1997041639A1 (en) * | 1996-04-30 | 1997-11-06 | 3Com Corporation | Isolation and signal filter transformer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432793B2 (en) | 2005-12-19 | 2008-10-07 | Bose Corporation | Amplifier output filter having planar inductor |
| US7332993B1 (en) | 2007-04-10 | 2008-02-19 | Bose Corporation | Planar transformer having fractional windings |
| DE102012003364A1 (en) * | 2012-02-22 | 2013-08-22 | Phoenix Contact Gmbh & Co. Kg | Planar transformer |
| WO2013124049A1 (en) * | 2012-02-22 | 2013-08-29 | Phoenix Contact Gmbh & Co. Kg | Planar transformer |
| US9460844B2 (en) | 2012-02-22 | 2016-10-04 | Phoenix Contact Gmbh & Co. Kg | Planar transmitter with a layered structure |
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA00009775A (en) | 2004-09-20 |
| BR0004921A (en) | 2001-05-29 |
| GB0024401D0 (en) | 2000-11-22 |
| KR20010036449A (en) | 2001-05-07 |
| ID28061A (en) | 2001-05-03 |
| KR100339563B1 (en) | 2002-06-03 |
| CN1292636A (en) | 2001-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |