WO2006011383A1 - 非可逆回路素子、その製造方法及び通信装置 - Google Patents
非可逆回路素子、その製造方法及び通信装置 Download PDFInfo
- Publication number
- WO2006011383A1 WO2006011383A1 PCT/JP2005/013163 JP2005013163W WO2006011383A1 WO 2006011383 A1 WO2006011383 A1 WO 2006011383A1 JP 2005013163 W JP2005013163 W JP 2005013163W WO 2006011383 A1 WO2006011383 A1 WO 2006011383A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ferrite
- circuit board
- electrode
- permanent magnet
- magnet
- Prior art date
Links
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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/023—Reduction of cross-talk, noise or electromagnetic interference using auxiliary mounted passive components or auxiliary substances
- H05K1/0233—Filters, inductors or a magnetic substance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/32—Non-reciprocal transmission devices
- H01P1/36—Isolators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
-
- 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
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
-
- 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/303—Surface mounted components, e.g. affixing before soldering, aligning means, spacing means
- H05K3/305—Affixing by adhesive
Definitions
- Non-reciprocal circuit device manufacturing method thereof, and communication device
- the present invention relates to a nonreciprocal circuit device, and more particularly to a nonreciprocal circuit device such as an isolator or circulator used in a microwave band, a manufacturing method thereof, and a communication device.
- nonreciprocal circuit elements such as isolators and circulators have a characteristic of transmitting a signal only in a predetermined specific direction and not transmitting in a reverse direction.
- an isolator is used in a transmission circuit part of a mobile communication device such as a car phone or a mobile phone.
- Patent Document 1 discloses that a ferrite magnet assembly is formed by sandwiching a ferrite in which a central electrode is formed by an electrode film between two permanent magnets. There is disclosed a structure in which a three-dimensional object is vertically arranged on a circuit board containing a matching circuit element.
- Patent Document 2 a ferrite substrate on which a center electrode is arranged, a magnet substrate, and a yoke are bonded and integrated with an adhesive, and then cut to obtain individual nonreciprocal circuit elements. Is disclosed.
- connection electrodes are formed on a plurality of side surfaces of the ferrite, which increases the manufacturing cost. Has a problem.
- Patent Document 1 Japanese Patent Laid-Open No. 2002-261513
- Patent Document 2 Japanese Patent Laid-Open No. 2001-16005
- an object of the present invention is to provide a nonreciprocal circuit element and a communication device that are capable of mounting a permanent magnet and a flight integrally on a circuit board with good stability, and that are small and have good characteristics. It is to provide.
- Another object of the present invention is to provide a method for manufacturing a non-reciprocal circuit device having a high production efficiency and a low manufacturing cost.
- a non-reciprocal circuit device includes:
- a non-reciprocal circuit comprising: a permanent magnet; a flight to which a DC magnetic field is applied by the permanent magnet; a plurality of center electrodes disposed on the flight; and a circuit board having terminal electrodes formed on the surface.
- the flight is formed of a conductor film in a state where a plurality of the central electrodes are insulated and intersected with each other on the main surface, and a connection electrode connected to the central electrode is formed on one side surface orthogonal to the main surface. Formed,
- Both the flight and the permanent magnet have a rectangular parallelepiped shape, and the main surface of the flight is smaller than the main surface of the permanent magnet.
- a pair of substantially permanent magnets are bonded to the opposing main surfaces of the flight, respectively, and integrated with ferrite,
- the ferrite and the pair of permanent magnets, which are bonded to each other, are placed on the circuit board on one side surface orthogonal to the respective main surfaces,
- connection electrode and the connection electrode are joined between one side surface of the ferrite and the surface of the circuit board.
- the bonding material and the terminal electrode formed on the circuit board are interposed.
- the non-reciprocal circuit device there is a predetermined dimensional difference between one side surface of the ferrite and one side surface of the permanent magnet, and between the one side surface of the flight and the surface of the circuit board.
- the connection electrode, the bonding material, and the terminal electrode are interposed, and at least a part of one side surface of the permanent magnet is directly or directly on the surface of the circuit board with or without an adhesive. Therefore, the ferrite (permanent magnet) assembly (ferrite magnet assembly) can be mounted on the circuit board in a stable and stable manner without tilting.
- a pair of permanent magnets of approximately the same shape face each other and the ferrite that forms the center electrode is sandwiched between them, and the main surface of the ferrite is smaller than the main surface of the permanent magnet, so the permanent magnet generates DC magnetic flux with good parallelism.
- a uniform magnetic field is applied to the flight, and electrical characteristics such as insertion loss of the irreversible circuit element are improved.
- the ferrite and the pair of permanent magnets bonded to each other are placed on the circuit board on one side surface orthogonal to the respective main surfaces, that is, the flight and the permanent magnet are circuit boards.
- connection electrode is formed on this surface, so that the connection electrode and the circuit board are formed. Connection with the terminal electrode is reliable and easy.
- the manufacturing process can be simplified by simply forming the connecting electrode on one surface.
- the center electrode has a first center electrode having one end electrically connected to the first input / output port and the other end electrically connected to the second input / output port. And a second center electrode having one end electrically connected to the second input / output port and the other end electrically connected to the grounding third port. It is preferable that it is comprised from these. Thus, a small lumped constant isolator can be obtained.
- the circuit board may contain a matching element, which can further reduce the size of the nonreciprocal circuit element.
- the ferrite and the permanent magnet are preferably bonded with a thermosetting epoxy adhesive.
- Thermosetting adhesives have good heat resistance, and heat when soldering and mounting a ferrite magnet assembly on a circuit board or when soldering and mounting a nonreciprocal circuit element on a printed circuit board of a communication device It is possible to prevent heat from causing poor adhesion between the ferrite and the permanent magnet, thereby shifting or detaching each other.
- this type of adhesive is a dielectric, and even if it is used in a part that directly contacts the ferrite or the center electrode, it has electrical characteristics. There is no deterioration.
- thermosetting epoxy adhesive sheet If a thermosetting epoxy adhesive sheet is used, the workability of the adhesion is good, and in the application of the adhesive, the uniformity of thickness, prevention of leakage to other locations, etc. should be finely managed. Such management is unnecessary if a force sheet is used.
- An ultraviolet heat combined curing type epoxy adhesive may be used for bonding the ferrite and the permanent magnet. If the flight is temporarily fixed at a predetermined position by irradiation of ultraviolet rays and then fixed by heat curing, the positional accuracy between the ferrite and the permanent magnet is improved.
- thermosetting adhesives tend to decrease in viscosity during the thermosetting process by increasing the temperature, and the ferrite position may be shifted. Such temporary misalignment can be prevented by temporarily fixing with an ultraviolet curable adhesive.
- the permanent magnet is preferably a ferrite magnet.
- Ferrite magnets are dielectrics and can distribute electromagnetic fields inside. For this reason, high-frequency magnetic flux and high-frequency electric lines of force can freely pass through the magnet even if it is located close to the ferrite or center electrode. As a result, the Q value is kept high without the inductance of the center electrode being reduced, and the isolation is low loss, enabling a wide band operation.
- connection electrode formed on one side of the ferrite is bonded to a terminal electrode formed on the circuit board via a bonding material such as solder, and one side of the permanent magnet is formed on the circuit board. It is preferable that it is joined with an adhesive. By joining the ferrite and permanent magnets independently to each other between the ferrite magnet assembly and the circuit board, the joining is ensured. If only soldering is used, the non-reciprocal circuit element is mounted on the circuit board of the communication device with reflow solder, etc., and the solder at this part melts, causing a misalignment of the ferrite magnet assembly, resulting in failure or deterioration of characteristics. Cause.
- a nonreciprocal circuit device manufacturing method includes a permanent magnet, a ferrite to which a DC magnetic field is applied by the permanent magnet, a plurality of center electrodes arranged on the ferrite, and a terminal electrode on the surface. And a non-reciprocal circuit device manufacturing method including the formed circuit board.
- a plurality of the central electrodes are formed on the main surface of the ferrite so as to intersect with each other while being insulated from each other by a conductor film, and a connecting electrode is formed on a side surface orthogonal to the main surface to produce a central electrode assembly.
- a center electrode assembly is sandwiched between a pair of mother-one magnet substrates via an adhesive layer to form a mother substrate.
- a so-called multi-piece process is adopted.
- the magnet assembly can be manufactured with high accuracy and high production efficiency, and the cost can be reduced.
- the ferrite magnet assembly is highly accurate, the electrical characteristics of the nonreciprocal circuit device are improved as a result.
- a communication device includes the nonreciprocal circuit element, so that preferable electrical characteristics can be obtained, and the device can be reduced in size and height.
- FIG. 1 is an exploded perspective view showing an embodiment of a non-reciprocal circuit device (2-port isolator) according to the present invention.
- FIG. 2 is a perspective view showing a center electrode assembly of the 2-port isolator.
- FIG. 3 is a perspective view showing a modified example of the center electrode assembly.
- FIG. 4 is a block diagram showing a circuit configuration in a circuit board of the 2-port isolator.
- FIG. 5 is an equivalent circuit diagram showing a first circuit example of the two-port isolator.
- FIG. 6 is an equivalent circuit diagram showing a second circuit example of the two-port isolator.
- FIG. 7 is an explanatory diagram of the second circuit example.
- FIG. 8 is an elevation view schematically showing a configuration of a ferrite magnet assembly of the two-port isolator.
- FIG. 9 is an elevational view schematically showing another example of the ferrite magnet assembly.
- FIG. 10 is a perspective view showing one embodiment of a manufacturing method according to the present invention.
- FIG. 11 is an explanatory view showing the manufacturing method in the order of steps.
- FIG. 12 is an elevation view schematically showing another mounting example of a ferrite magnet assembly.
- FIG. 13 is a block diagram showing an embodiment of a communication apparatus according to the present invention.
- FIG. 1 shows an exploded perspective view of a two-port isolator 1 that is an embodiment of a non-reciprocal circuit device according to the present invention.
- This two-port isolator 1 is a lumped constant isolator, which is roughly a metal yoke 10, a circuit board 20, a center electrode assembly 31 including a ferrite 32, and a permanent magnet for applying a DC magnetic field to the ferrite 32. It is formed of magnets 41 and 41.
- the yoke 10 is also made of a ferromagnetic material such as soft iron and is silver-plated, and has a frame shape surrounding the center electrode assembly 31 and the permanent magnets 41, 41 on the circuit board 20.
- a cap 15 made of a dielectric material (for example, a resin or a ceramic) is bonded to the upper surfaces of the ferrite 32 and the permanent magnets 41 and 41.
- the cap 15 may be a metal plate. Suitable metal plates include copper, brass, and silver-plated materials.
- a dielectric having an electrode plate on the upper surface or both surfaces may be used as the cap 15.
- the metal cap 15 is preferably connected to the yoke 10 by soldering, conductive adhesive, welding, or the like.
- the center electrode assembly 31 is formed by forming a first center electrode 35 and a second center electrode 36 electrically insulated from each other on main surfaces 32a and 32b of the microwave ferrite 32.
- the ferrite 32 has a rectangular parallelepiped shape having a first main surface 32a and a second main surface 32b that are parallel to each other, and the first main surface 32a and the second main surface 32b have a short side dimension and a long side dimension.
- the ratio (hereinafter referred to as the shape ratio) is 1: 1.5 to 5 and the first main surface 32 a and the second main surface 32 b are arranged on the circuit board 20 in a substantially vertical direction.
- the surfaces in contact with the long sides of the main surfaces 32a and 32b are referred to as side surfaces 32c and 32d.
- the permanent magnets 41 and 41 are bonded to the main surfaces 32a and 32b so as to apply a magnetic field to the main surfaces 32a and 32b in a direction substantially perpendicular to the main surfaces 32a and 32b of the ferrite 32.
- Magnet assembly Solid 30 is formed. The configuration and manufacturing process of the ferrite magnet assembly 30 will be described in detail below.
- the first central electrode 35 rises from the lower right on the first main surface 32a of the ferrite 32 and is inclined at a relatively small angle with respect to the long side at the upper left.
- the second main surface 32b is formed to overlap the first main surface 32a in a transparent state on the second main surface 32b through the connection electrode 35a on the side surface 32c, and is formed on the side surface 32d. It is connected to the connection electrode 35b.
- the 0.5th turn 36a is inclined at a relatively large angle with respect to the long side from the substantially central portion of the lower side to the upper left side on the first main surface 32a. And turn around the second main surface 32b via the connection electrode 36b on the side surface 32c, and the first turn 36c is inclined to the left at a relatively large angle on the second main surface 32b.
- the first central electrode 35 is formed so as to intersect with the first central electrode 35.
- the lower end of the first turn 36c wraps around the first main surface 32a via the connection electrode 36d on the side surface 32d, and this 1.5th turn 36e is parallel to the 0.5th turn 36a on the first main surface 32a.
- the second turn 36g is also formed on the second main surface 32b so as to intersect the first center electrode 35 in parallel with the first turn 36c, and is connected to the connection electrode 36h on the side surface 32d.
- the second center electrode 36 is wound around the ferrite 32 in a spiral manner for two turns.
- the number of turns is calculated as 0.5 turn when the center electrode 36 crosses the first or second main surface 32a, 32b once. Then, the crossing angle of the center electrodes 35 and 36 is set as necessary, and the input impedance and insertion loss are adjusted.
- first and second center electrodes 35, 36 can be variously changed.
- Fig. 3 shows a modification.
- the first and second center electrodes 35, 36 are respectively It is formed by branching into two on the main surfaces 32a and 32b.
- the circuit board 20 is a laminated substrate in which predetermined electrodes are formed on a plurality of dielectric sheets, laminated, and sintered, and inside thereof, as shown in FIG.
- Capacitors CI, C2, Csl, Cs2, Cpl, Cp2 and termination resistor R are built-in.
- Terminal electrodes 25a to 25f are formed on the upper surface, and external connection terminal electrodes 26, 27, and 28 are formed on the lower surface, respectively.
- FIG. 5 shows a basic first circuit example in the nonreciprocal circuit device (2-port isolator 1) according to the present invention
- the equivalent circuit shown in FIGS. 6 and 7 shows the second circuit example.
- FIG. 4 shows the configuration of the second circuit example shown in FIG.
- connection terminal electrode 26 formed on the lower surface of the circuit board 20 functions as the input port P1, and this electrode 26 is connected to the matching capacitor C 1 and the terminal via the matching capacitor Cs 1.
- connection point 21a Connected to connection point 21a with resistor R.
- the connection point 21a is connected to one end of the first center electrode 35 via a terminal electrode 25a formed on the upper surface of the circuit board 20.
- the other end of the first center electrode 35 is connected to a terminal resistor R and a capacitor CI, via a connection electrode 35c formed on the side surface 32d of the ferrite 32 and a terminal electrode 25b formed on the upper surface of the circuit board 20. Connected to C2.
- the external connection terminal electrode 27 formed on the lower surface of the circuit board 20 functions as the output port P2, and this electrode 27 is connected to the connection point 21b of the capacitors C2 and C1 via the matching capacitor Cs2. It is connected.
- the one end connection electrode 36i (formed on the side surface 32d of the ferrite 32) of the second center electrode 36 is connected to the connection point 21b via the terminal electrode 25c formed on the upper surface of the circuit board 20. Yes.
- the other end connection electrode 36h of the second center electrode 36 is connected to the external connection terminal electrode 28 formed on the lower surface of the circuit board 20 via the terminal electrode 25d formed on the upper surface of the circuit board 20.
- the This external connection terminal electrode 28 functions as the ground port P3.
- the external connection terminal electrode 28 is also connected to the yoke 10 via terminal electrodes 25e and 25f formed on the upper surface of the circuit board 20.
- the impedance adjustment is grounded at the connection point between the input port P1 and the capacitor Csl.
- Capacitor Cpl is connected.
- a grounded impedance adjustment capacitor Cp2 is also connected to the connection point between the output port P2 and the capacitor Cs2.
- the circuit board 20 and the yoke 10 are soldered together via terminal electrodes 25e and 25f, and the ferrite magnet assembly 30 is formed of various connection electrodes 35b and 35c on the side surface 32d of the ferrite 32.
- 36d, 36h, 36i are soldered together with the terminal electrodes 25a to 25d on the circuit board 20 and the lower surfaces 41d, 41d of the permanent magnets 41, 41 are bonded to the circuit board 20 with adhesive 2 4 (See Fig. 8).
- 8 is a cross-sectional view taken along the arrow AA in FIG.
- the ferrite 32 has a rectangular parallelepiped shape having a first main surface 32a and a second main surface 32b that are parallel to each other, and the second center electrode 36 is connected to the ferrite 32 2 Since it is turned around, a preferable insertion loss can be obtained over a wide band. This is because winding the first and second center electrodes 35, 36 around the ferrite 32 increases the number of intersections of the center electrodes 35, 36 and increases the coupling coefficient between the center electrodes 35, 36. This means that the insertion loss has been reduced and that the pass frequency has been widened.
- a pair of permanent magnets 41, 41 having the same shape face each other to sandwich the ferrite 32 that forms the first and second center electrodes 35, 36, and the main surfaces 32a, 32b of the ferrite 32 are permanent. Since it is smaller than the main surface 41a of the magnet 41 (see Fig. 8), the permanent magnet 41 generates direct current magnetic flux with good parallelism and a uniform magnetic field is applied to the ferrite 32, and the electrical loss such as insertion loss of the isolator 1 Improved characteristics.
- the main surfaces 32a and 32b of the ferrite 32 are arranged on the circuit board 20 in a substantially vertical direction, and the permanent magnets 41 and 41 have a magnetic field substantially perpendicular to the main surfaces 32a and 32b of the ferrite 32.
- the ferrite 32 and the permanent magnets 41, 41 are vertically arranged on the circuit board 20 so that a large magnetic field is applied. Even if the permanent magnets 41 and 41 are made thicker in order to obtain the same, the height is not increased regardless of the thickness, and a reduction in size and height is achieved.
- connection point 21a between the first center electrode 35 and the capacitor C1 and the input port P1 and the connection between the center electrodes 35 and 36 Point 21b and output port Since one additional matching capacitor Csl, Cs2 is inserted between P2 and P2, the inductance of the center electrodes 35, 36 is set large, and even when the electrical characteristics in a wide band are improved, the device is connected to the isolator. It is possible to match the impedance (50 ⁇ ). This effect can be achieved simply by inserting one of the matching capacitors Csl or Cs2.
- a matching inductor is inserted between the connection point of the second center electrode 36 and the capacitor C2 and the ground port P3, a desired high frequency such as a second harmonic or a third harmonic can be suppressed.
- the An LC series circuit composed of an inductor and a capacitor may be inserted between the input port P1 and the ground and between the output port P2 and the ground.
- the ferrite magnet assembly 30 will be described.
- a first center electrode 35 made of a conductor film
- an insulator film 37 a second center electrode 36 also having a conductor film force
- an insulator film 38 a film is formed.
- various connection electrodes are formed on the upper side surface 32c and the lower side surface 32d of the ferrite 32 by a conductor thick film.
- the center electrodes 35, 36 are made of an electrode film material made of silver, copper, gold or an alloy thereof on the main surfaces 32a, 32b of the ferrite 32, conductive powder such as gold or silver, and epoxy resin.
- An electrode film material such as a conductor composite material (paste or adhesive) is formed as a thin film by printing or transfer.
- these electrode film materials and photosensitive materials may be mixed and formed into a predetermined shape using a processing technique such as photolithography or etching.
- Insulator films 37 and 38 are printed or transferred from sintered glass powder, organic film such as epoxy resin, or a combination of glass cloth and organic film such as epoxy resin. It is formed by. Alternatively, these materials and a photosensitive material may be mixed and formed into a predetermined shape using a processing technique such as photolithography or etching. Insulator film 37, 3
- One or more layers of the conductor film and the insulator films 37, 38 of the center electrodes 35, 36 are provided as necessary, and in some cases, via holes (via holes) formed in the insulator films 37, 38. You may connect the conductor films of different layers.
- connection electrodes include electrode film materials such as silver, copper, gold and alloys thereof, and conductive materials such as gold and silver. Electrode film materials such as body powder and epoxy resin and other conductive composite materials (paste or adhesive) are formed as a thick film by printing or transfer. Alternatively, these electrode film materials and photosensitive substances may be mixed and formed into a predetermined shape using a processing technique such as photolithography or etching.
- Permanent magnets 41 and 41 are bonded to the main surfaces 32a and 32b of the ferrite 32 via an adhesive layer 42.
- an adhesive layer 42 a thermosetting one-component or two-component epoxy adhesive, an ultraviolet curable or ultraviolet heat combined curable epoxy adhesive, or an acrylic adhesive is suitable.
- an epoxy adhesive may be used which is processed into a sheet having a certain thickness in advance and has a strong tackiness. Moreover, you may use a double-sided adhesive sheet.
- the adhesive layer 42 may be coated in a dot pattern that does not necessarily have a uniform thickness on the entire surface.
- connection electrodes 35b, 35c, 36d, 36h, 36i formed on the lower surface 32d of the ferri iron 32 are joined to terminal electrodes 25a-25d formed on the upper surface of the circuit board 20, as shown in FIG. Joined by material 23 (eg, solder). Further, the lower surface 41 d of the permanent magnet 41 is bonded onto the circuit board 20 with an adhesive 24.
- an adhesive 24 a thermosetting one-component or two-component epoxy adhesive is suitable.
- the ferrite magnet assembly 30 has a ferrite 43 attached to both surfaces of the center electrode assembly 31 via an adhesive layer 42a, and an adhesive layer 42b. Permanent magnets 41 may be attached through these. Thus, the coupling between the center electrodes 35 and 36 can be enhanced.
- the joint surface with the circuit board 20 becomes planar, and various connection electrodes are formed on the lower side surface 32d.
- the connection between the electrode for use and the terminal electrodes 25a to 25d formed on the circuit board 20 is reliable and easy. Further, the various connection electrodes need only be formed on one surface, and the manufacturing process is simplified.
- connection electrodes formed on the lower side surface 32d are soldered to the terminal electrodes 25a to 25d formed on the circuit board 20, and the permanent magnets 41 and 41 are formed thereunder. Since the side surface 41d is bonded to the surface of the circuit board 20 directly or via a terminal electrode with the adhesive 24, that is, soldering and bonding are performed to join the ferrite magnet assembly 30 and the circuit board 20. By using it together, joining is ensured.
- thermosetting adhesive 24 is used in combination, it is possible to prevent such a failure or characteristic deterioration. Even when the permanent magnet 41 and the ferrite 32 are detached, the permanent magnet 41 is adhered on the circuit board 20, so that a predetermined electrical constant is maintained and a highly reliable nonreciprocal circuit element is obtained. be able to.
- connection electrodes formed on the lower surface 32d of the ferrite 32 are joined to the terminal electrodes 25a to 25d formed on the upper surface of the circuit board 20, and sintered with a thick film electrode material. Bonding method, bumping solder, gold, etc. using ultrasonic waves etc. to raise the temperature and fusing, or conductive powder such as gold, silver, etc. ) Can be used.
- a dimensional difference ⁇ is provided between the lower side surface 32d of the ferrite 32 and the lower side surface 41d of the permanent magnet 41 (see FIG. 8). Due to the presence of this dimensional difference a, the thicknesses of various connection electrodes, the thickness of the bonding material 23 such as solder bonded to the connection electrodes, the thickness of the terminal electrodes 25a to 25d formed on the circuit board 20, and the permanent The thickness of the adhesive 24 of the permanent magnet 41 is flush with the surface of the circuit board 20. As a result, the ferrite magnet assembly 30 can be mounted on the circuit board 20 in an accurate and reliable state without tilting.
- the ferrite 32 on which the center electrodes 35 and 36 are formed is accurately fixed to a predetermined portion of the permanent magnet 41 by adhesion, a stable isolator with almost no magnetic loss can be manufactured. it can.
- the positional relationship between the ferrite 32 and the permanent magnet 41 is integrated with a preferable parallelism due to the stability of the thickness of the adhesive layer. Can be ashamed.
- the distance between the opposing surfaces of the pair of permanent magnets 41 and 41 is also determined by the thickness of the adhesive layer 42 and the thickness of the ferrite 32, so that the magnetic circuit can be kept at a constant and stable as intended (with little variation). Can be formed. As a result, stable mass production of the isolator is possible and it is inexpensive.
- the central electrode assembly 31 and the pair of permanent magnets 41, 41 are integrated with the adhesive layer 42, so that the mechanically stable isolators that are not deformed or damaged due to vibration or impact. Become. Such an isolator is most suitable for a portable communication device.
- the center electrodes 35 and 36 are formed of conductor films on the main surfaces 32a and 32b of the ferrite 32, an isolator having a uniform electrical characteristic is formed stably with high accuracy in shape. Can be mass-produced.
- the insulator films 37 and 38 are also made of a sintered glass powder, so that the main surfaces 32a and 32b of the ferrite 32 are flattened compared to the case where a central electrode with a metal plate force is used. It can be made into a shape with good degree. As a result, the positional relationship between the ferrite 32 and the pair of permanent magnets 41 and 41 can be integrated with high parallelism.
- connection electrodes are provided on the upper side surface 32c and the lower side surface 32d of the ferrite 32, and the electrode films on the main surfaces 32a and 32b of the ferrite 32 are connected to the various connection electrodes.
- Various connection electrodes formed on the surface 32d are joined to face the terminal electrodes 25a to 25d formed on the upper surface of the circuit board 20.
- the center electrode 35, 36 arranged on the ferrite 32 can be easily and reliably soldered to the matching circuit element in the circuit board 20 or the input / output external connection terminal electrodes 26, 27, Can be connected to 28.
- the conductor film portions on the main surfaces 32a and 32b of the ferrite 32 of the center electrodes 35 and 36 are not soldered, so there is no risk of solder erosion. Therefore, silver powder or the like having a very low glass frit content (10% or less) can be used as the material for the conductor film portion. Such a material has an electrical conductivity close to that of pure silver, so that an isolator with very little input loss can be obtained.
- thermosetting property is not only low in workability but also low in price. Since the heat-resistant adhesive is soldered, the heat and isolator when soldering and mounting the ferrite magnet assembly 30 onto the circuit board 20 are soldered onto the printed circuit board of the communication device. It is possible to prevent the ferrite 32 and the permanent magnet 41 from being defectively bonded to each other due to the heat at the time, so that the mutual positions are shifted or detached.
- this type of adhesive is a dielectric, and even if it is used in a portion in direct contact with the ferrite 32 and the center electrodes 35 and 36, the electrical characteristics do not deteriorate.
- thermosetting adhesives tend to decrease in viscosity during the thermosetting process due to temperature rise, and the position of the ferrite 32 may shift. Temporarily fixing with an ultraviolet curable adhesive can prevent such displacement.
- An epoxy adhesive is processed into a sheet with a certain thickness in advance, and if this is a thermosetting epoxy sheet having S-tackiness (temporary fixability, adhesiveness), the adhesion work In addition to good properties, the uniformity and stability of the adhesive layer thickness can be maintained. Further, it is possible to prevent a problem that the adhesive flows and covers the terminal electrode partially.
- a thick film electrode is obtained by baking and solidifying a metal fine powder such as silver together with a glass frit.
- a conductivity close to that of a solid metal is obtained.
- the surface area of the electrode film is increased, it is somewhat disadvantageous in terms of environmental resistance. That is, chemical conductivity such as sulfidation and acidification is caused to deteriorate the conductivity, and migration is likely to occur due to moisture.
- the glass material used as the insulator layer is exposed to extremely high temperature and high humidity, the insulating property may deteriorate.
- the permanent magnets 41 and 41 cover the conductor film and the insulator layer formed on the main surfaces 32a and 32b of the ferrite 32 with the adhesive layer 42 interposed therebetween. If the permanent magnet 41 is a ferrite magnet, gas or liquid does not pass through, and as a result, the conductor film and the insulator layer formed on the main surfaces 32a and 32b of the ferrite 32 are protected from the external environment.
- the ferrite magnet is a dielectric and is the main application range of the isolator 1 0
- Microwave band around 3 to 3GHz 'UHF band is magnetically a paramagnetic material with a relative dielectric constant of around 1. Therefore, even if the ferrite magnet is disposed in the vicinity of the microwave ferrite 32, the distribution of the high-frequency electromagnetic field at that position is not particularly adversely affected. In other words, an electromagnetic field can be distributed inside, and even if it is placed close to the ferrite 32 and the center electrodes 35 and 36, high-frequency magnetic flux and high-frequency electric field lines can freely pass inside the magnet. As a result, the Q value is kept high without the inductance of the center electrodes 35 and 36 decreasing, and the isolation is low loss, enabling a wide band operation.
- thermosetting adhesive layer 42 is previously used in the ferrite magnet assembly 30, the adhesive layer 42 can be completely cured (cured) by solder reflow.
- the ferrite 32 and the permanent magnet 41 also need to be fixed with glass or the like.
- this soldering is performed by using a method in which bumps such as solder or gold are used to raise the temperature using ultrasonic waves, etc., a finer connection will be joined with higher precision than with soldering. be able to.
- a method of bonding a hard conductive composite material (paste or adhesive) such as gold or silver and epoxy resin is used, the temperature stress is less than with soldering! / ⁇ Joining can be performed.
- the circuit board 20 is a multilayer dielectric substrate.
- a circuit network such as a capacitor and an inductor can be built inside, and the miniaturization and thinning of the isolator can be achieved, and the connection between the circuit elements is performed within the substrate, thereby improving the reliability. I can expect.
- the circuit board 20 does not necessarily need to be multi-layered, and a single-layer matching capacitor or the like may be externally attached as a chip type.
- thermosetting epoxy adhesive is used to join the lower surface 41d of the permanent magnet 41 and the circuit board 20, the curing process of the adhesive and the lower surface of the ferrite 32 are performed.
- the soldering process between the various connection electrodes 2d and the terminal electrodes 25a to 25d can be shared. The process can be adjusted by setting the time course of temperature rise appropriately. That is, if it is preheated slowly, the adhesive 24 can be cured and the fixing position can be determined before the solder is melted. On the other hand, by increasing the temperature, the adhesive 24 can be pre-cured (the viscosity decreases with increasing temperature) when the solder melts, and the solder melts and the volume and thickness decrease.
- the soldering object can sink, and the electrical resistance is reduced by minimizing the thickness of the solder, which is the cause of the increase in electrical resistance. Strength can be increased.
- the cap 15 having a dielectric force is adhered to the upper surface of the ferrite magnet assembly 30.
- the cap 15 is made of a ferromagnetic material such as iron, it affects the magnetic circuit and attracts the magnetic flux, so that the uniformity of the DC bias magnetic field distribution may be deteriorated and the electrical characteristics such as insertion loss may be deteriorated.
- the cap 15 is made of copper, brass, or silver-plated to these, the area where high-frequency magnetic flux can be distributed is slightly reduced compared to the case where it is made of a dielectric, but it has a significant effect on the electrical characteristics. There is nothing.
- an electrode plate is placed on a part of the upper and lower surfaces of the dielectric to form the cap 15, it is effective in terms of high-frequency shielding, and a wide range of high-frequency magnetic field distribution can be secured, resulting in low electrical characteristics. Easy to operate with loss and broadband.
- the metal cap 15 is connected to the yoke 10 by soldering, adhesive, welding, or other methods to increase the effect of high-frequency shielding, prevent unwanted radiation, and stabilize the operation of communication equipment using this isolator. Is effective.
- the soft steel may be made of greaves. That is, by arranging the permanent magnets 41 and 41 on both surfaces of the ferrite 32 as in this embodiment, the necessary magnetic force can be obtained without being surrounded by the metal yoke 10.
- ferrite 32 In the flat structure in which the main surfaces 32a and 32b are placed parallel to the surface of the circuit board 20, the height of the isolator is limited, so the magnet can be thick enough to have enough magnetic force, or the ferrite 32
- the configuration in which the permanent magnets 41 are arranged on the main surfaces 32a and 32b has been unable to be adopted.
- the center electrode assembly 31 is manufactured, and an adhesive sheet 42 is provided on almost the entire surface as shown in FIG. !)
- a large number of (middle 2 rows x 2 rows) center electrode assemblies 3 1 are sandwiched between the large-area mother-magnet substrates 411 and 412, and the mother substrate 413 (see Fig. 11) Is produced.
- the mother substrate 413 is cut into predetermined dimensions, and a ferrite-magnet assembly 30 is obtained in which a single unit of the central electrode assembly 31 is sandwiched between a pair of permanent magnets 41, 41.
- FIG. 11 shows the process.
- step 1 the adhesive sheet 42 with the separator 415 is applied to the mother magnet substrate 411, and in the process 2, the adhesive sheet 42 is fixed on the mother magnet substrate 411.
- step 2 it is necessary to make V so that air does not enter between the adhesive sheet 42 and the mother magnet substrate 411.
- the adhesive sheet 42 it is preferable to adhere the adhesive sheet 42 to the mother magnet base plate 411 with a squeegee roller or the like.
- the adhesive sheet 42 and Z or the mother magnet substrate 411 are heated to about 60 to 150 at this time, the adhesiveness of the adhesive sheet 42 increases and the adhesiveness to the mother magnet substrate 411 increases. Will increase. However, it is necessary to appropriately control the temperature and heating time so that the thermosetting of the adhesive sheet 42 does not proceed.
- step 3 the separator 415 is peeled off, and only the adhesive sheet 42 is left on the mother magnet substrate 41 1.
- the center electrode assembly 31 is attached in a matrix on the mother magnet substrate 411 with the adhesive sheet 42.
- the center electrode assembly 31 may be attached individually, but the center electrode assembly 31 is previously attached in a matrix on another adhesive tape or mount, and then on the adhesive sheet 42 of the mother magnet substrate 411 at once. It may be pasted on.
- step 5 the adhesive sheet 42 is attached to the other mother-one magnet substrate 412.
- step 6 the mother-magnetic substrate 412 is attached to the mother-one magnet substrate 411 via the adhesive sheet 42.
- step 7 the vertical force of the mother magnet substrates 411 and 412 is also heated while increasing the pressure, and the adhesive sheet 42 is cured and the mother substrate 413 Get.
- step 8 the mother substrate 413 is attached on the dicing tape 416.
- a foam tape or adhesive tape that loses its adhesiveness by heating, a tape that is peeled off by washing with a solvent, or a wax that softens when heated, may be temporarily attached to the base plate for cutting.
- This type of tape or base plate is for chucking (fixing) the mother board 413 on the dicing table of the dicer.
- step 9 the mother substrate 413 is cut by a dicer to obtain one unit of ferrite 'magnet assembly 30.
- the ferrite magnet assembly 30 having the same size of the permanent magnets 41 and 41 and the center electrode assembly 31 including the rectangular parallelepiped ferrite 32 sandwiched therebetween is produced with high accuracy. It can be manufactured well, and the effect of cost reduction is great. The effects of such a ferrite magnet assembly 30 have been described above.
- the large-area mother-magnet substrate 411, 412 is used, the inclination of the magnet 41 is eliminated as compared with the case where the individual permanent magnet 41 and the ferrite 32 are bonded, and the permanent magnet 41 and the ferrite 32. And the parallelism increases. As a result, the parallelism and uniformity of the bias magnetic field applied to the ferrite 32 are guaranteed, and electrical characteristics such as insertion loss are not deteriorated. Further, since there is no risk of positional deviation of the ferrite 32, it is possible to obtain a highly reliable isolator with little aging as well as eliminating individual differences.
- the ferrite magnet assembly 30 may be mounted on a circuit board 20 as shown in FIG. That is, the other main surface 41b of the permanent magnet 41 fixed to the both main surfaces 32a, 32b of the ferrite 32 via the adhesive layer 42 is fixed to the inner wall surface of the yoke 10 via the adhesive layer 43. Then, the connection electrode 35b formed on the lower side surface 32d of the ferrite 32 and the terminal electrodes 25a to 25d on the circuit board 20 are joined with a joining material (solder) 23. At the same time, the lower surface of the yoke 10 is joined to the terminal electrodes 25e and 25f on the circuit board 20 with a conductive adhesive 44 (which may be solder or the like).
- a conductive adhesive 44 which may be solder or the like.
- the lower side surfaces 41d of the pair of permanent magnets 41, 41 are not joined to the circuit board 20, but at least one of the lower side surfaces 41d of the magnets 41, 41 is part of the circuit board. 20 It is necessary to be in close contact with at least one of the terminal electrodes 25a to 25d.
- the lower surface 41d of the left permanent magnet 41 is partially in contact with any one of the terminal electrodes 25a to 25d, and the lower surface 41d of the right permanent magnet 41 also floats the surface force of the circuit board 20. Indicate state.
- FIG. 13 is an electric circuit block diagram of the RF portion of the mobile phone 220.
- 22 2 is an antenna element
- 223 is a duplexer
- 231 is a transmission side isolator
- 232 is a transmission side amplifier
- 233 is a band pass filter for a transmission side stage
- 234 is a transmission side mixer
- 235 is a reception side amplifier
- 236 Is a reception-side interband bandpass filter
- 237 is a reception-side mixer
- 238 is a voltage controlled oscillator (VCO)
- 239 is a local bandpass filter.
- VCO voltage controlled oscillator
- the two-port isolator 1 can be used as the transmission-side isolator 231.
- the isolator 1 By mounting the isolator 1, favorable electrical characteristics can be obtained, which contributes to the reduction in size and height of the mobile phone.
- non-reciprocal circuit device the manufacturing method thereof, and the communication device according to the present invention can be variously modified within the scope of the gist thereof, not limited to the above-described embodiments.
- a force chip type inductor or capacitor showing all the matching circuit elements built in the circuit board may be externally attached to the circuit board.
- the ferrite may have a rectangular parallelepiped-shaped force angle portion polished by barrel polishing or the like.
- the present invention is useful for nonreciprocal circuit elements such as isolators and circulators used in the microwave band and communication devices, and is particularly excellent in terms of improving assemblability and miniaturization. Yes.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Non-Reversible Transmitting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-224168 | 2004-07-30 | ||
JP2004224168 | 2004-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006011383A1 true WO2006011383A1 (ja) | 2006-02-02 |
Family
ID=35786133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/013163 WO2006011383A1 (ja) | 2004-07-30 | 2005-07-15 | 非可逆回路素子、その製造方法及び通信装置 |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2006011383A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007208943A (ja) * | 2006-02-06 | 2007-08-16 | Murata Mfg Co Ltd | 非可逆回路素子及び通信装置 |
WO2008087788A1 (ja) | 2007-01-18 | 2008-07-24 | Murata Manufacturing Co., Ltd. | 非可逆回路素子及びその製造方法 |
WO2009041196A1 (ja) * | 2007-09-28 | 2009-04-02 | Murata Manufacturing Co., Ltd. | 非可逆回路素子 |
US7808339B2 (en) | 2007-02-07 | 2010-10-05 | Murata Manufacturing Co., Ltd. | Non-reciprocal circuit element |
WO2010113384A1 (ja) * | 2009-04-01 | 2010-10-07 | パナソニック株式会社 | 半導体装置とその製造方法 |
JP2012213034A (ja) * | 2011-03-31 | 2012-11-01 | Murata Mfg Co Ltd | フェライト・磁石素子及びその製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001016005A (ja) * | 1999-06-28 | 2001-01-19 | Murata Mfg Co Ltd | 非可逆回路素子及びその製造方法 |
JP2002198707A (ja) * | 2000-06-14 | 2002-07-12 | Murata Mfg Co Ltd | 非可逆回路素子および通信装置 |
-
2005
- 2005-07-15 WO PCT/JP2005/013163 patent/WO2006011383A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001016005A (ja) * | 1999-06-28 | 2001-01-19 | Murata Mfg Co Ltd | 非可逆回路素子及びその製造方法 |
JP2002198707A (ja) * | 2000-06-14 | 2002-07-12 | Murata Mfg Co Ltd | 非可逆回路素子および通信装置 |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007208943A (ja) * | 2006-02-06 | 2007-08-16 | Murata Mfg Co Ltd | 非可逆回路素子及び通信装置 |
WO2008087788A1 (ja) | 2007-01-18 | 2008-07-24 | Murata Manufacturing Co., Ltd. | 非可逆回路素子及びその製造方法 |
US7522012B2 (en) | 2007-01-18 | 2009-04-21 | Murata Manufacturing Co., Ltd. | Nonreciprocal circuit device and manufacturing method of the same |
JPWO2008087788A1 (ja) * | 2007-01-18 | 2010-05-06 | 株式会社村田製作所 | 非可逆回路素子及びその製造方法 |
JP4858543B2 (ja) * | 2007-01-18 | 2012-01-18 | 株式会社村田製作所 | 非可逆回路素子及びその製造方法 |
US7808339B2 (en) | 2007-02-07 | 2010-10-05 | Murata Manufacturing Co., Ltd. | Non-reciprocal circuit element |
WO2009041196A1 (ja) * | 2007-09-28 | 2009-04-02 | Murata Manufacturing Co., Ltd. | 非可逆回路素子 |
US7859357B2 (en) | 2007-09-28 | 2010-12-28 | Murata Manufacturing Co., Ltd. | Non-reciprocal circuit device |
JP4807457B2 (ja) * | 2007-09-28 | 2011-11-02 | 株式会社村田製作所 | 非可逆回路素子 |
WO2010113384A1 (ja) * | 2009-04-01 | 2010-10-07 | パナソニック株式会社 | 半導体装置とその製造方法 |
JP2012213034A (ja) * | 2011-03-31 | 2012-11-01 | Murata Mfg Co Ltd | フェライト・磁石素子及びその製造方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7532084B2 (en) | Nonreciprocal circuit element | |
JP4380769B2 (ja) | 非可逆回路素子、その製造方法及び通信装置 | |
US7522012B2 (en) | Nonreciprocal circuit device and manufacturing method of the same | |
WO2007086177A1 (ja) | 非可逆回路素子及び通信装置 | |
JP4345709B2 (ja) | 非可逆回路素子、その製造方法及び通信装置 | |
US20090293272A1 (en) | Method for manufacturing nonreciprocal circuit device and method for manufacturing composite electronic component | |
WO2006011383A1 (ja) | 非可逆回路素子、その製造方法及び通信装置 | |
JP2004040001A (ja) | コイル部品及び回路装置 | |
US7915971B2 (en) | Nonreciprocal circuit device | |
JP5018790B2 (ja) | 非可逆回路素子 | |
JP4345691B2 (ja) | 非可逆回路素子及び通信装置 | |
JP2008092147A (ja) | 非可逆回路素子、その製造方法及び通信装置 | |
JP2000049508A (ja) | 非可逆回路素子、非可逆回路装置及びその製造方法 | |
US7859358B2 (en) | Non-reciprocal circuit device | |
US6943642B1 (en) | Nonreciprocal circuit element and method of manufacturing the same | |
US6888432B2 (en) | Laminated substrate, method of producing the same, nonreciprocal circuit element, and communication device | |
US7859357B2 (en) | Non-reciprocal circuit device | |
JP4284868B2 (ja) | 非可逆回路素子及び通信装置 | |
JP4182926B2 (ja) | 非可逆回路素子及び通信装置 | |
JPH09307316A (ja) | 非可逆回路素子 | |
JP3872042B2 (ja) | 非可逆回路素子の製造方法 | |
JP2002217611A (ja) | 非可逆回路素子及び通信装置 | |
JP2010183130A (ja) | 非可逆回路部品及びその製造方法 | |
JP2012257161A (ja) | 電子部品モジュール | |
JP2012235418A (ja) | 非可逆回路素子 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: JP |