WO2013027409A1 - 配線基板及びこれを用いた高周波モジュール - Google Patents
配線基板及びこれを用いた高周波モジュール Download PDFInfo
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- WO2013027409A1 WO2013027409A1 PCT/JP2012/005296 JP2012005296W WO2013027409A1 WO 2013027409 A1 WO2013027409 A1 WO 2013027409A1 JP 2012005296 W JP2012005296 W JP 2012005296W WO 2013027409 A1 WO2013027409 A1 WO 2013027409A1
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- Prior art keywords
- wiring
- frequency module
- wiring board
- solder resist
- high frequency
- Prior art date
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Definitions
- the present disclosure relates to a wiring board and a high-frequency (microwave or millimeter wave) module using the wiring board, and particularly to a high-frequency module in which a high-frequency circuit chip, for example, a wireless IC is mounted on the wiring board.
- a high-frequency circuit chip for example, a wireless IC
- a wiring board 1 for a high-frequency antenna module has a wiring portion 3 and a back wiring portion 7 formed on the front surface and the back surface of a dielectric layer 4, and a surface mount type component, for example, a chip component 2 is mounted thereon.
- solder resist layer 5 As a dielectric near the wiring portion 3 on the surface on which the surface-mounted chip component 2 is mounted, the solder 6 is prevented from spreading on the substrate.
- the dielectric loss of the solder resist layer 5 causes transmission loss at high frequencies.
- the increase in effective dielectric constant due to the solder resist layer 5 brings about shortening of the effective wavelength and increases transmission loss.
- Patent Document 1 The technique described in Patent Document 1 is known as a mounting method related to the above module substrate.
- the mounting method disclosed in Patent Document 1 is a module manufacturing method in which a solder resist layer is applied at the time of substrate manufacture, SMT components are solder mounted on the substrate, and then the solder resist layer is completely removed with a solvent, thereby suppressing loss of high frequency characteristics. Is disclosed.
- Patent Document 1 has the following problems.
- the solder resist layer has the effect of increasing the adhesion strength of the conductor pattern on the substrate serving as the wiring. Since the conductor wiring or the parasitic element wiring of the antenna maintains the adhesion strength to the substrate by the solder resist layer, the technique according to Patent Document 1 that removes all the resist easily causes peeling of the wiring. Reliability decreases.
- An object of the present invention is to provide a highly reliable wiring board for a high-frequency module and a high-frequency module using the same.
- the present disclosure is a wiring substrate for a high frequency module including a wiring portion for high frequency transmission and a solder resist layer formed on the wiring portion, wherein the solder resist layer is an input / output terminal of a chip component. In a region from a predetermined distance to a predetermined distance, an opening is formed in a part on the wiring portion.
- the opening includes a plurality of openings formed at a predetermined interval.
- the opening of the solder resist layer is configured by a stripe pattern having a predetermined interval.
- the opening is a quadrangle.
- the opening is circular or elliptical.
- the opening includes a side surface of the wiring part.
- the opening is formed along the wiring portion, and the wiring portion is left leaving an edge portion along a current path (current direction) of the wiring portion. Arranged above.
- the interval between the openings is ⁇ g / 8 or less of a transmission frequency (wavelength ⁇ g) on the wiring portion.
- the interval between the openings gradually decreases as the distance from the input / output terminal of the surface-mounted chip component mounted on the wiring portion increases.
- the width of the opening portion gradually increases as the distance from the input / output terminal of the surface-mounted chip component mounted on the wiring portion increases.
- the present disclosure uses the wiring board for the high-frequency module, and has a surface mount type chip component mounted on a part of the wiring part via an input / output terminal.
- the present disclosure uses the wiring board for the high frequency module, and the wiring portion is used for microwave or millimeter wave transmission.
- (A) is explanatory drawing (top view) which shows the principal part structure of a high frequency module using the wiring board for high frequency modules of Embodiment 1 of this indication
- (b) is explanatory drawing cut
- (A) is a principal part perspective view of the wiring part of the wiring board for high frequency modules of Embodiment 1 of this indication
- (b) is AA sectional drawing of (a).
- the top view which shows the principal part structure of a high frequency module using the wiring board for high frequency modules of Embodiment 3 of this indication (A) is a top view illustrating a configuration of a main part of the high-frequency module using the wiring board for a high-frequency module according to Embodiment 3 of the present disclosure, and (b) is a cross-sectional view cut along the wiring direction (AA cross-sectional view).
- (A) is a top view illustrating a configuration of a main part of a high-frequency module using the wiring board for a high-frequency module according to Embodiment 4 of the present disclosure, and (b) is a cross-sectional view cut along the wiring direction (AA cross-sectional view).
- (A) is a top view showing a main part configuration of a high-frequency module using the wiring board for a high-frequency module according to Embodiment 5 of the present disclosure, and (b) is a cross-sectional view cut along the wiring direction (AA cross-sectional view) )
- the figure which shows the principal part structure of the high frequency module using the wiring board for high frequency modules of Embodiment 6 of this indication.
- (A) is a figure (top view) which shows the principal part structure of the high frequency module using the wiring board for high frequency modules of Embodiment 10 of this indication
- (b) is the figure (sectional drawing) cut
- (A) is a figure (top view) which shows the principal part structure of the high frequency module of the modification using the wiring board for high frequency modules of Embodiment 10 of this indication
- (b) is the figure cut
- (A) is a cross-sectional view taken along the line AA in FIG. 21, and (b) is a cross-sectional view taken along the line BB in FIG.
- a top view showing a configuration of a high-frequency module according to a twelfth embodiment of the present disclosure A top view showing a configuration of a high-frequency module according to a thirteenth embodiment of the present disclosure. Top view showing the configuration of the high-frequency module according to the fourteenth embodiment of the present disclosure. A top view showing a configuration of a high-frequency module according to a fifteenth embodiment of the present disclosure.
- (A)-(c) is a figure which shows the structure of the high frequency module of Embodiment 16 of this indication, (a) is a top view, (b) is AA sectional drawing of (a), (c) Sectional drawing which shows the modification of (b) (A) And (b) is a figure which shows the structure of the high frequency module of Embodiment 17 of this indication, (a) is a top view, (b) is AA sectional drawing of (a). (A) And (b) is a figure which shows the structure of the high frequency module of Embodiment 18 of this indication, (a) is a top view, (b) is AA sectional drawing of (a).
- (A) And (b) is a figure which shows the structure of the high frequency module of Embodiment 19 of this indication, (a) is a top view, (b) is AA sectional drawing of (a).
- (A) And (b) is a figure which shows the structure of the modification of the high frequency module of Embodiment 19 of this indication, (a) is a top view, (b) is AA sectional drawing of (a).
- (A) And (b) is a figure which shows the structure of the modification of the high frequency module of Embodiment 20 of this indication, (a) is a top view, (b) is AA sectional drawing of (a).
- (A) And (b) is a figure which shows the structure of the modification of the high frequency module of Embodiment 21 of this indication, (a) is a top view, (b) is AA sectional drawing of (a).
- (A)-(d) is a figure which shows the structure of the modification of the high frequency module of Embodiment 21 of this indication, (a) And (b) is a principal part top view which shows the high frequency module of this Embodiment.
- (c) and (d) are a top view and a cross-sectional view of the high-frequency circuit chip of the present embodiment. The figure which shows the principal part top view of the high frequency module of Embodiment 22 of this indication.
- FIG. 23 is a principal part top view and sectional drawing of the high frequency module of Embodiment 23 of this indication
- the perspective view which shows the structure of the high frequency module of a comparative example (A) is a cross-sectional view taken along the line AA in FIG. 37, and (b) is a cross-sectional view taken along the line BB in FIG.
- FIG. 1 The figure which shows the principal part top view of the high frequency module of a comparative example (A) And (b) is a figure which shows the principal part top view of the high frequency module of a comparative example (A) is explanatory drawing (top view) which shows the principal part structure of a high frequency module using the wiring board for high frequency modules of a prior art example, (b) is explanatory drawing (sectional drawing) cut
- the wiring board (high-frequency module board) for the high-frequency module in the embodiment of the present disclosure will be described in detail with reference to the drawings.
- FIG. 1A is an explanatory diagram (top view) illustrating a configuration of a main part of a high-frequency module using the wiring board for a high-frequency module according to Embodiment 1 of the present disclosure, and FIG. 1B is cut according to the wiring direction.
- FIG. 2A is a perspective view of the main part of the wiring portion
- FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A
- FIG. 3 is an overall schematic diagram of the high-frequency module.
- FIG. 4 is a top view showing the pattern of the solder resist layer in the vicinity of the surface-mounted chip component (SMT component) 2.
- FIG. 5 is a top view showing a pattern of a solder resist layer in the vicinity of the high-frequency IC chip 9, which is an SMT component having a three-terminal structure.
- the high-frequency module wiring board 1 of the present embodiment includes a high-frequency transmission wiring portion 3 and a solder resist layer 5 formed on the wiring portion 3.
- the opening 8 of the solder resist layer 5 is constituted by a plurality of stripe patterns.
- the solder resist layer 5 covers the wiring part 3 at a predetermined interval.
- the solder resist layer 5 is an area from the input / output terminals 2a and 2b of the surface mount type chip component (SMT component) 2 to a predetermined distance L1, as shown in the overall view in FIG. 3 and the enlarged view of the main part in FIG. Then, an opening 8 is provided in a part on the wiring part 3.
- SMT component surface mount type chip component
- the solder resist layer 5 has a wiring portion 3 so as to have an opening 8 in a part on the wiring portion 3 in a region from the input / output terminals 9a, 9b, 9c of the high frequency IC chip 9 to a predetermined distance L1. Covering.
- the entire back surface of the wiring board 1 is covered with a back surface wiring portion 7 using metal, and a microstrip line is formed with respect to the wiring portion 3 on the front surface.
- the wiring board is formed with a front wiring portion 3 and a back wiring portion 7 using copper Cu on a dielectric layer 4 made of a high melting point glass epoxy multilayer material, and, for example, PSR4000-AuS703 on the upper surface.
- a solder resist layer 5 using a photosensitive liquid solder resist manufactured by Hitachi Chemical Co., Ltd. is formed as described above.
- the solder resist layer 5 has, for example, a relative dielectric constant of 3.8 at 1 GHz and a relative dielectric loss tangent tan ⁇ of 0.026. Further, for example, the thickness of the base plate is 40 ⁇ m, the thickness of the solder resist layer 5 in the wiring portion is 15 ⁇ m, and the thickness of the wiring portion 3 on the front surface and the back wiring portion 7 is 16 ⁇ m. Further, for example, the wiring width of the surface wiring portion 3 is set to 65 ⁇ m, and the characteristic impedance of the line is set to 50 ⁇ .
- the width in the wiring direction of the portion to which the solder resist layer 5 is applied is 100 ⁇ m
- the width in the wiring direction of the portion to which the solder resist is not applied is 100 ⁇ m
- the above values are representative values.
- the opening 8 of the solder resist layer is configured by a stripe pattern orthogonal to the direction of the wiring portion 3.
- the solder resist layer 5 covers the wiring portion 3 on the surface at a predetermined interval (100 ⁇ m width every 100 ⁇ m).
- the opening 8 is a quadrangle.
- the wiring portion 3 on the surface of the wiring board 1 and each terminal of the high-frequency IC chip 9 having a two-terminal element, for example, the SMT component 2 constituting the resistor and the three-terminal element are respectively connected by the solder 6. Connected.
- solder resist layer 5 By not applying the solder resist layer 5 to the portion where the solder 6 is attached for mounting, it is possible to mount an SMT component while suppressing the spread of the solder 6, and soldering with other components or each wiring in the wiring section 3 Avoid connection by 6.
- solder resist layer 5 in order to suppress the influence of dielectric loss or shortening of the effective wavelength and suppress the increase of transmission loss, a part of the solder resist layer 5 is perpendicular to the extending direction of the wiring portion. It is removed in a stripe shape having a direction, and an opening is selectively provided in the wiring part 3, while a part of the wiring part 3 is covered with a solder resist layer 5. Therefore, the solder resist layer 5 also serves to maintain the connection strength between the wiring portion 3 on the wiring substrate 1 and the dielectric layer 4.
- the wiring board according to the present disclosure is configured by providing a portion where the solder resist layer 5 is not applied in addition to the SMT component mounting portion, as shown in FIGS. 1 (a) and 1 (b).
- the solder resist is placed on the wiring substrate 1 on which the wiring portion 3 is formed, and the portions to be coated and the portions not to be coated are alternately disposed along the wiring, Transmission loss due to dielectric loss can be reduced.
- an increase in effective dielectric constant is suppressed, and an increase in transmission loss can be reduced by suppressing the shortening of the effective wavelength.
- the portions that are not applied to both solder resist layers 5 of both sides of the two wires connected to the two-terminal SMT component and the three wires connected to the three-terminal SMT component are installed.
- a portion that is not applied to the solder resist layer 5 may be provided for at least one of the wires of the wiring portion 3.
- the wiring substrate of this embodiment without removing the solder resist layer 5 entirely, by removing part of the wiring on the wiring, it is possible to suppress the influence of dielectric loss and effective wavelength reduction, An increase in transmission loss can be suppressed, wiring strength can be increased, and a highly reliable wiring board for a high-frequency module can be provided.
- FIG. 7 shows the measurement results of the reflection characteristics when the interval between the openings 8 is changed.
- the vertical axis represents reflection characteristics, and the horizontal axis represents frequency (GHz).
- Line a is a measurement value (w / oSR) covered entirely with a solder resist layer
- line b is a measurement value with an interval between openings of the solder resist layer being 100 ⁇ m
- line c is an interval between openings of the solder resist layer being 200 ⁇ m.
- the line d is the measurement value with the gap between the openings of the solder resist layer being 300 ⁇ m
- the line e is the measurement value with the gap between the openings of the solder resist layer being 400 ⁇ m
- the line f is the opening of the solder resist layer.
- the line g the measured value with the spacing of the openings of the solder resist layer set to 600 ⁇ m.
- FIG. 7 shows that the reflection characteristics are deteriorated when the distance between the openings of the solder resist layer is 400 ⁇ m or more than 300 ⁇ m or less.
- the reflection characteristic is ⁇ 30 [dB] or less.
- the vertical axis represents the reflection characteristics
- the horizontal axis represents the installation width of the solder resist (SR), that is, the distance between the openings.
- the reflection characteristics are deteriorated when the installation width of the solder resist, that is, the interval between the openings is 400 ⁇ m or more than 300 ⁇ m or less.
- 300 ⁇ m is ⁇ g / 8 ( ⁇ g: wavelength of transmission frequency).
- the interval between the openings is not more than ⁇ g / 8 of the transmission frequency on the wiring part.
- the pitch of the openings that is, the sum of the opening width and the pattern width of the solder resist layer is smaller than half the wavelength at the transmission frequency. This is because the reflection of the signal to the input side increases when there is a repeated impedance change due to an interval of half the wavelength.
- the impedance change point becomes a reflection surface of the high frequency signal, a part of the signal is reflected to the original path, and the remaining signal is transmitted.
- the signal reflected by the (n + 1) th reflecting surface passes through the half-wavelength path and returns to the nth reflecting surface.
- the reflected signal undergoes a phase change of one-half wavelength and returns to the input side without being reflected again on the nth reflection surface, so that the reflection characteristics are deteriorated.
- the sum of the opening width and the pattern width of the solder resist layer is smaller than half the wavelength ⁇ g at the transmission frequency.
- FIG. 9 is a diagram illustrating a main configuration of a high-frequency module using the wiring board for a high-frequency module according to the second embodiment of the present disclosure, and the solder resist layer 5 in the vicinity of the surface-mounted chip component (SMT component) 2. It is a top view which shows the pattern.
- the solder resist layer of the second embodiment has a pattern of the solder resist layer 5 on the wiring portion 3 having a circular opening 8c with a predetermined interval.
- the other parts, for example, the configuration of the wiring part are the same as those in the above embodiment, and the description is omitted here.
- interval between the openings 8c is desirably about ⁇ g / 8 or less, as in the first embodiment.
- the opening portion is not limited to the stripe shape, the square shape, and the circular shape, but may be realized by, for example, a polygonal shape or an elliptical opening portion 8d as shown in FIG.
- the wiring board of the present embodiment by removing part of the wiring portion on the wiring without removing all of the solder resist layer 5, the influence of dielectric loss, It is possible to provide a highly reliable wiring board for a high-frequency module by suppressing the shortening of the effective wavelength, suppressing an increase in transmission loss, increasing the strength of the wiring.
- FIG. 11A and FIG. 11B are diagrams illustrating a main configuration of a high-frequency module using the wiring board for a high-frequency module according to the third embodiment of the present disclosure.
- FIG. 11A is a top view showing the main configuration of the high-frequency module using the wiring board for the high-frequency module according to Embodiment 3 of the present disclosure
- FIG. 11B is a cross-sectional view cut along the wiring direction (A -A sectional view).
- the solder resist layer in the wiring substrate for the high frequency module according to the third embodiment forms the openings 8 in a stripe shape as in the first embodiment, but leaves the solder resist layer 5 on the wiring portion 3 to leave the wiring portion 3.
- the side surface solder resist layer 5 is removed. For this reason, the side surface of the wiring part 3 becomes the side surface opening 8s.
- the interval between the openings 8 is preferably about ⁇ g / 8 or less, as in the first embodiment.
- the portion to which the solder resist is not applied is not limited to the stripe shape, the square shape, and the circular shape, and may be realized by, for example, a polygonal shape or an elliptical opening portion 8d shown in FIG.
- the wiring board of the present embodiment by removing part of the wiring portion on the wiring without removing all of the solder resist layer 5, the influence of dielectric loss, It is possible to provide a highly reliable wiring board for a high-frequency module by suppressing the shortening of the effective wavelength, suppressing an increase in transmission loss, increasing the strength of the wiring.
- FIG. 12A and FIG. 12B are diagrams illustrating the main configuration of a high-frequency module using the wiring board for a high-frequency module according to the fourth embodiment of the present disclosure.
- 12A is a top view showing the configuration of the main part of the high-frequency module using the wiring board for a high-frequency module according to Embodiment 4 of the present disclosure
- FIG. 12B is a cross-sectional view cut along the wiring direction (A -A sectional view).
- the solder resist layer in the wiring substrate for the high frequency module according to the fourth embodiment is basically formed with the openings 8 in a stripe shape as in the third embodiment, but the solder resist layer 5 on the wiring portion 3 is left. Then, the solder resist layer 5 on the side surface of the wiring part 3 is removed. For this reason, the side surface of the wiring part 3 becomes the opening part 8p.
- solder resist layer 5 is also removed at the side edge portion of the wiring portion 3 to form the opening 8.
- the portion where the solder resist layer is not applied is not limited to a stripe shape, a quadrangle, or a circle, and is realized by, for example, a polygonal shape or an elliptical opening 8d shown in FIG. Also good.
- the solder resist layer 5 is not completely removed, but is removed on a part of the wiring of the wiring portion, thereby affecting the influence of dielectric loss. Therefore, it is possible to provide a highly reliable wiring board for a high-frequency module by suppressing the shortening of the effective wavelength, suppressing an increase in transmission loss, increasing the strength of the wiring.
- FIG. 13A and FIG. 13B are diagrams illustrating the main configuration of a high-frequency module using the wiring board for a high-frequency module according to the fifth embodiment of the present disclosure.
- FIG. 13A is a top view showing the main configuration of the high-frequency module using the wiring board for the high-frequency module according to the fifth embodiment of the present disclosure
- FIG. 13B is a cross-sectional view cut along the wiring direction (A -A sectional view).
- the portion where the solder resist layer 5 is not applied is arranged on the wiring portion 3 of the wiring substrate 1 and realized.
- openings are formed in the solder resist layer 5 on the wiring portion 3 at a predetermined interval.
- the periphery of the side edge portion of the wiring portion 3 is slightly larger than the wiring width. In the wide region, the solder resist layer 5 was removed to form an opening 8p.
- the portion where the solder resist layer is not applied is not limited to a stripe shape, a square shape, or a circle shape, and may be realized by, for example, a polygon or an ellipse.
- the wiring substrate of the present embodiment by removing a part of the wiring portion 3 on the wiring without removing all of the solder resist layer 5, the influence of dielectric loss In addition, it is possible to suppress the shortening of the effective wavelength, suppress the increase in transmission loss, increase the strength of the wiring, improve the surface protection, and provide a highly reliable wiring board for a high-frequency module.
- FIG. 14 is a diagram illustrating a main configuration of a high-frequency module using the high-frequency module wiring board according to the sixth embodiment of the present disclosure.
- FIG. 14 after a portion where the solder resist layer is applied and a portion where the solder resist layer is not applied are continuously arranged on the wiring portion 3 on the wiring substrate, FIG. As shown in the right part, the portion R where the solder resist layer is not applied may be continuously arranged.
- a plurality of openings can be formed by setting the distance between the openings to ⁇ g / 24, and further described in the above embodiment. It is possible to satisfy the condition of the interval ⁇ g / 8 or less of the openings.
- the wiring part is the same as that of the above embodiment, and the description is omitted here.
- the degree of freedom is increased in the solder resist layer pattern design, and the design is facilitated.
- FIG. 15 is a diagram illustrating a configuration of a main part of a high-frequency module using the wiring board for a high-frequency module according to the seventh embodiment of the present disclosure.
- the openings 8 may be formed intermittently by covering the wiring portion 3p on the wiring substrate not connected to the other electrode or other wiring with the solder resist layer 5.
- the configurations of the wiring portion and other portions are the same as those in the above embodiment, and the description thereof is omitted here.
- the present disclosure can be applied to wiring that is not directly connected to the SMT component, or wiring that is not connected to the electrode of the component or other wiring.
- FIG. 17 is a diagram illustrating a main configuration of a high-frequency module using the high-frequency module wiring board according to the eighth embodiment of the present disclosure.
- the arrangement interval of the openings 8 is separated from the input / output terminals 2 b of the surface mount type chip component 2 mounted on the wiring unit 3. Accordingly, the size is gradually reduced.
- the width of the solder resist layer 5 is gradually formed wider as the distance from the input / output terminal 2b of the surface-mounted chip component 2 mounted on the wiring portion 3 increases.
- the wiring part is the same as that of the above embodiment, and the description is omitted here.
- This configuration has an effect of preventing the deterioration of the reflection characteristics due to a sudden change in the dielectric constant by reducing the ratio of the dielectric on the line in a stepwise manner.
- FIG. 18 is a diagram illustrating a main configuration of a high-frequency module using the high-frequency module wiring board according to the ninth embodiment of the present disclosure.
- the distance between the openings 8 increases as the distance from the input / output terminal 2b of the surface-mounted chip component 2 mounted on the wiring section 3 increases. It is formed gradually larger.
- the other parts, for example, the configuration of the wiring part are the same as those in the above embodiment, and the description is omitted here.
- This configuration has an effect of preventing the deterioration of the reflection characteristics due to a sudden change in the dielectric constant by reducing the ratio of the dielectric on the line in a stepwise manner.
- FIG. 19A is an explanatory diagram (top view) illustrating a main part configuration of a high-frequency module using the wiring board for a high-frequency module according to the tenth embodiment of the present disclosure, and FIG. 19B is cut according to the wiring direction. It is explanatory drawing (AA sectional view taken on the line).
- the high-frequency module shown in FIG. 19A is an antenna element instead of the surface-mount type SMT component 2 provided on the wiring board 1 for the high-frequency module of the first embodiment shown in FIG. 10 is provided.
- the wiring part 3 and the solder resist layer 5 on the wiring board are the same as those in the first embodiment.
- the distance between the end of the antenna element 10 and the solder resist layer 5 closest to the end is preferably ⁇ / 8 or more.
- FIG. 20A is an explanatory diagram (top view) showing a main part configuration of a high-frequency module of a modification using the wiring board for a high-frequency module according to the tenth embodiment of the present disclosure, and FIG. It is explanatory drawing (AA sectional view taken on the line) cut
- a solder resist layer 5 may be applied on the antenna element 10.
- a high-frequency circuit chip for example, a wireless IC
- a wiring board constituting a module substrate or a high-frequency circuit chip is first mounted on a BGA (ball grid array) package.
- BGA ball grid array
- Sealing resin is injected between the wiring board and the high frequency circuit chip or the BGA package in order to increase the mounting strength of the high frequency circuit chip or the BGA package on the wiring board and to improve the dustproof and moistureproof characteristics of the high frequency circuit chip.
- the sealing resin is a dielectric
- the impedance changes, causing signal loss or impedance mismatch.
- it is the same even if there is an adhesive for mounting components or a dielectric component other than the sealing resin.
- impedance is a physical quantity indicating a ratio of voltage and current when high-frequency power propagates through a transmission line.
- matching means matching with the condition that the maximum power of a certain signal source can be extracted. Conversely, a state in which the impedance between a certain signal source and the signal input destination does not match is called “mismatch”.
- ZX is the impedance ( ⁇ ) of the object to be measured
- Z0 is the characteristic impedance ( ⁇ ) of the measurement circuit, and is generally 50 ⁇ .
- the land (wiring electrode) for component mounting is designed by adjusting the impedance matching with high accuracy, just like the wiring, but since the solder resist is formed by mask printing, it is difficult to control the position and thickness. .
- the sealing resin covers the wiring of the wiring board, the effective dielectric constant changes in this portion. For this reason, the impedance changes, and loss due to impedance mismatch and generation of a standing wave occur.
- the sealing resin used for mounting the high frequency circuit chip has low accuracy in mounting height and application amount of the high frequency circuit chip, it is difficult to achieve a constant impedance at that portion.
- solder resist solder resist
- the solder resist is formed at the time of board manufacture, and after mounting components in the soldering process, the solder resist is removed using water or an organic solvent to prevent characteristic changes.
- sealing resin is injected between the substrate and the high-frequency circuit chip or BGA package in order to increase the mounting strength of the high-frequency circuit chip or BGA package on the module substrate and to improve the dustproof and moisture-proof characteristics of the high-frequency circuit chip. Has been.
- the sealing resin is a dielectric
- the effective dielectric constant changes in this portion. For this reason, transmission loss increases due to impedance mismatching, and a standing wave becomes apparent.
- Reference Document 2 Japanese Unexamined Patent Publication No. 2000-269384
- MMIC monolithic microwave integrated circuit
- the solder resist is removed after mounting, but it is difficult to obtain sufficient bonding strength between the wiring and the wiring board because there is no coating with the solder resist.
- the wiring in the vicinity of the high-frequency circuit chip may be covered with a sealing resin, and there is a portion where the impedance changes sharply on the wiring, resulting in discontinuity.
- the present disclosure has been made in view of the above situation, and even if the IC circuit surface of the high-frequency circuit chip is entirely covered with the sealing resin, the loss due to the impedance change of the wiring on the wiring board or the generation of the standing wave is suppressed.
- An object is to provide a high-frequency module that can be used.
- FIG. 21 is an explanatory view (perspective view) showing the configuration of the high-frequency module 101 of the first embodiment
- FIGS. 22A and 22B are cross-sectional views of FIG.
- FIG. 22 is a cross-sectional view taken along line AA when the high-frequency module is cut so as to include the wiring portion 107 depending on the wiring direction
- FIG. 22B is a cross-sectional view taken along line BB.
- the high frequency module 101 is configured by mounting a high frequency circuit (microwave or millimeter wave IC) chip 102 on a wiring substrate 103 as a module substrate.
- a high frequency circuit microwave or millimeter wave IC
- FIG. 22 (a) and FIG. 22 (b) show examples of flip chip mounting in which the circuit forming surface of the high-frequency circuit chip 102 faces the wiring substrate 103 and is mounted with its upper and lower surfaces reversed.
- the impedance adjustment circuit 106 is disposed outside the mounting portion of the high-frequency circuit chip 102, that is, the input / output terminal 104.
- FIGS. 37, 38 (a), and 38 (b) are comparative views.
- FIG. 37 is an explanatory diagram (perspective view) showing the configuration of a high-frequency module that does not form the impedance adjustment circuit 106, and FIG. FIG.
- FIG. 38 is a cross-sectional view taken along line AA of the high-frequency module cut along the wiring direction so as to include the wiring portion 107
- FIG. 38B is a cross-sectional view taken along line BB cut along the direction perpendicular to the wiring.
- the high-frequency module 101 of the present embodiment includes a high-frequency circuit chip 102 and a wiring substrate 103 including a wiring portion 107 that flip-chip-connects bumps as input / output terminals 104 of the high-frequency circuit chip 102.
- a sealing resin 105 is filled between the high-frequency circuit chip 102.
- the wiring portion 107 of the wiring substrate 103 has an impedance adjustment circuit 106 within a predetermined range outside the input / output terminal 104.
- the circuit surface of the high-frequency circuit chip 102 faces the wiring substrate 103, and the electrodes on the chip wiring 109 on the high-frequency circuit chip 102 are connected to the wiring portions 107 on the wiring substrate 103 and metal protrusions (incoming bumps).
- the output terminal 104) is connected.
- a thermosetting resin for example, epoxy resin
- a sealing resin 105 between the high-frequency circuit chip 102 and the wiring substrate 103, the mounting strength of the high-frequency circuit chip 102 on the wiring substrate 103 is increased,
- the circuit surface of the high-frequency circuit chip 102 is covered with a resin to obtain a waterproof / moisture-proof and dust-proof effect.
- the impedance adjustment circuit 106 is provided so as to cover the wiring part 107 at a predetermined distance from the input / output terminal 104.
- the width W 0.3 mm
- the length L 0.5 mm
- the dielectric constant of the dielectric layer is, for example, 3.4.
- the predetermined distance from the input / output terminal 104 is an area within ⁇ g / 4.
- the wiring substrate 103 forms a ground coplanar structure with the wiring portion 107 formed on the surface of a dielectric substrate 110 (for example, a resin substrate or a ceramic substrate) and the entire back surface as the ground layer 108.
- the signal wavelength on the wiring board 103 is assumed when the signal frequency for transmitting the wiring on the module board, that is, the wiring board 103 is f and the effective dielectric constant of the wiring board 103 is ⁇ r.
- ⁇ g 1 / (f ⁇ ⁇ r) can be used.
- the impedance adjustment circuit 106 is installed closer to the position of about ⁇ g / 4 than the input / output terminal 104 on the high-frequency circuit chip 102, that is, the bump (electrode).
- the dimensions for arranging the plurality of dielectric patterns are, for example, the width and interval of the dielectric material are ⁇ g / 16.
- “with dielectric pattern” and “without” become one set. This is ⁇ g / 16 so that “with dielectric pattern” and “without” are repeated twice (multiple times).
- the sealing resin exists on the chip wiring 109 (high frequency wiring) connected to the electrode of the high frequency circuit chip 102, the impedance is deviated from the design value and mismatching occurs. May occur.
- impedance adjustment circuit 106 on the wiring portion 107 of the wiring board 103, impedance mismatching can be mitigated, and a high-frequency module with small propagation loss and standing wave generation due to impedance mismatching can be realized.
- V1 is the amplitude voltage of the traveling wave
- V2 is the amplitude voltage of the reflected wave
- ⁇ is the voltage reflection coefficient.
- the traveling wave and the reflected wave are added, but since their frequencies are equal, vibration with a fixed node position is observed in the transmission line. This is called standing wave.
- the standing wave ratio represents the degree of vibration of the standing wave, and thus shows the degree of reflection of the high frequency signal.
- transmission lines, signal lines, and loads can be replaced with feeder lines, transmitters, and antennas, respectively.
- Return loss 9.6 dB.
- return loss (dB) ⁇ 20 ⁇ LOG
- VSWR is 1.98. Incidentally, VSWR should just be 2 or less.
- the wiring substrate 103 In designing the wiring substrate 103, the wiring pattern and the dielectric pattern are designed in consideration of the impedance, the size and position of the solder resist pattern are calculated, and the mask is formed.
- a solder resist layer is formed as a dielectric pattern using a mask. For this reason, the wiring board 103 provided with the impedance adjustment circuit 106 can be easily formed.
- the high-frequency circuit chip 102 or other surface mount component (SMT) After mounting the high-frequency circuit chip 102 or other surface mount component (SMT) using the wiring board 103, the VSWR is measured, and the solder resist pattern is deleted or added according to the measured value to make fine adjustments Thus, the high frequency module 101 having more excellent transmission characteristics is formed.
- SMT surface mount component
- a resist or a silk dielectric material is also applicable as the dielectric.
- the mask for forming each pattern may be changed in the manufacturing process of the wiring substrate 103. Further, after manufacturing the wiring substrate 103, an arbitrary dielectric (for example, a resin film or a dielectric paste) may be applied. Impedance can be adjusted by adjusting the heating temperature and heating time after coating and controlling the degree of dripping of the dielectric.
- the dielectric pattern using the solder resist constituting the impedance adjustment circuit 106 is added or deleted while adjusting the VSWR while measuring the VSWR. .
- VSWR voltage standing wave ratio
- an IC chip for example, a high-frequency circuit chip
- face-up mounting in which the circuit surface of the IC chip is mounted upward in addition to flip chip mounting in which the upper and lower surfaces are inverted.
- the present embodiment can be applied to both.
- the solder resist is used as the dielectric pattern.
- the present invention is not limited to the solder resist.
- an epoxy resin is used as the thermosetting resin, and a polycarbonate resin or a polyethylene resin is used as the thermoplastic resin. Is also possible.
- FIG. 23 is a top view showing a main part of the high-frequency module according to the twelfth embodiment.
- FIG. 23 shows an example of flip chip mounting.
- FIG. 39 is a comparative view, and
- FIG. 39 is a top view showing the configuration of the high-frequency module in which the impedance adjustment circuit 106 is not formed.
- the dielectric layer patterns are arranged one by one as the impedance adjustment circuit 106 on the wiring portion 107 on the wiring substrate 103.
- three dielectric layer patterns are arranged. Patterns 106a, 106b, and 106c are arranged.
- the impedance can be gradually changed by arranging a plurality of patterns along the extending direction of the wiring portion. Since other parts are the same as those in the above embodiment, the description thereof is omitted here.
- FIG. 24 is a top view showing a main part of the high-frequency module according to the thirteenth embodiment.
- the dielectric layer pattern is arranged so as to cover the wiring portion 107 over the entire wiring width direction of the wiring portion 107 on the wiring substrate 103 as the impedance adjustment circuit 106.
- Three dielectric layer patterns 16a, 16b, and 16c are arranged so as to cover the edge 107e of the wiring portion 107.
- the impedance can be gradually changed by arranging a plurality of patterns of dielectric layers along the extending direction of the wiring portion 107 on the wiring substrate 103. Since other parts are the same as those in the above embodiment, the description thereof is omitted here.
- the current / electric field distribution on the line is concentrated on the line end (end along the current direction: edge 107e). For this reason, the effect of adjusting the impedance can also be obtained by disposing a dielectric layer at the end. Further, since the area of the impedance adjustment circuit is reduced, for example, in the application using a dispenser, the manufacturing cost can be suppressed by shortening the working time.
- two patterns of dielectric layers constituting the impedance adjustment circuit may be arranged on both edges (edges 107e) of the wiring portion 107.
- the impedance is discontinuous by covering the vicinity of the line end (edge 107e) with the dielectric layer. Can relax the sex. Therefore, also in the present embodiment, the same effect as in the twelfth embodiment is achieved.
- FIG. 25 is a top view showing a main part of the high-frequency module according to the fourteenth embodiment.
- the three dielectric layer patterns 26a, 26b, and 26c which are the same size of the dielectric layer pattern, have intervals C1 and C2 that are spaced from the high frequency circuit chip 102. It arrange
- the discontinuity of the impedance can be alleviated because the distance C is gradually increased and the impedance gradually changes as the distance from the input / output terminal 104 of the high-frequency circuit chip 102 increases.
- FIG. 26 is a top view showing a main part of the high-frequency module according to the fifteenth embodiment.
- the impedance adjustment circuit 36 is a pattern of a dielectric layer whose lengths La, Lb, and Lc (La> Lb> Lc) are gradually reduced, and the three dielectric layer patterns 36a and 36b. , 36c are arranged. That is, the pattern areas of the three dielectric layers are gradually reduced.
- the three dielectric layer patterns 36a, 36b, and 36c gradually increase the intervals C1 and C2 as the distance from the input / output terminal 104 of the high-frequency circuit chip 102 increases. It is arranged to spread. (C1 ⁇ C2).
- FIG. 27 (a) to 27 (c) are diagrams showing the main part of the high-frequency module according to the sixteenth embodiment.
- FIG. 27 (a) is a top view
- FIG. 27 (b) is a diagram of FIG. It is AA sectional drawing.
- the dielectric pattern width W in the region covering the wiring portion 107 on the wiring substrate 103 is gradually decreased as the distance from the bumps constituting the input / output terminal 104 is increased.
- a dielectric layer pattern is used.
- the dielectric pattern width W in the region covering the wiring portion 107 is gradually reduced, and the dielectric pattern area also gradually decreases. , Impedance changes gradually. For this reason, the discontinuity of impedance can be eased.
- the dielectric pattern can be easily formed because it is patterned using a mask.
- the thickness gradually decreases in addition to the dielectric pattern width W in the region covering the wiring portion 107 as the distance from the input / output terminal 104 of the high-frequency circuit chip 102 increases. You may do it. Furthermore, the impedance changes gradually smoothly.
- FIG. 28 (a) and 28 (b) are diagrams showing a main part of the high-frequency module according to the seventeenth embodiment.
- FIG. 28 (a) is a top view
- FIG. 28 (b) is a diagram of FIG. 28 (a). It is AA sectional drawing.
- the thickness (film thickness) Ta, Tb, Tc of the dielectric pattern covering the wiring portion is gradually reduced as the distance from the input / output terminal 104 of the high-frequency circuit chip 102 decreases.
- the dielectric layer patterns 56a, 56b, and 56c are used.
- the film thicknesses Ta, Tb, and Tc of the three dielectric layer patterns 56a, 56b, and 56c have the following relationship. (Ta>Tb> Tc)
- thermosetting resin used as the thermosetting resin
- the film thicknesses are sequentially changed.
- a method of preparing a mask having selective openings and filling the openings of the mask with resin is employed. By repeatedly applying a region where the film thickness needs to be increased a plurality of times, it is possible to easily form a pattern of the dielectric layer in which the film thickness is changed sequentially.
- the dielectric layer may be a solder resist or a pattern of a dielectric layer formed by a coating method.
- FIG. 29 (a) and 29 (b) are diagrams showing the main part of the high-frequency module according to the eighteenth embodiment.
- FIG. 29 (a) is a top view
- FIG. 29 (b) is a diagram of FIG. 29 (a). It is AA sectional drawing.
- the impedance adjustment circuit 166 the pattern of one dielectric layer in which the thickness T of the dielectric pattern covering the wiring portion is gradually reduced is used.
- T1, T2, and T3 from the side closer to the input / output terminal have the following relationship. T1>T2> T3
- an epoxy resin may be used as the thermosetting resin, and the film thickness may be sequentially changed.
- a method of preparing a mask having an opening formed according to circuit design and filling the opening of the mask with a resin is employed.
- the pattern of the dielectric layer can be easily formed by repeatedly applying a region that needs to be thickened a plurality of times.
- the impedance adjustment circuit can take various forms. For example, a plurality of dielectric pattern intervals may be arranged side by side, the area of the dielectric pattern may be gradually changed, a triangular pattern is formed, and the width covering the wiring portion is gradually increased. It may be changed.
- impedance adjustment is performed. You may change the height of the dielectric pattern which comprises a circuit.
- the impedance adjustment circuit using, for example, a solder resist or a silk dielectric material, it is easy to change the mask for forming each pattern in the manufacturing process of the wiring board. Can be formed. Further, for example, a resin film or a dielectric paste may be applied as an arbitrary dielectric after the wiring board is manufactured.
- silk which is a dielectric material
- silk may be printed in the same process as a printed character using a solder resist or a silk screen on a module substrate.
- an arbitrary dielectric may be applied by a dispenser after manufacturing the substrate.
- the dimensions when arranging a plurality of dielectric patterns are, for example, the width and interval of the dielectric material are each ⁇ g / 16. In this case as well, the reason is the same as in the case of the eleventh embodiment.
- the method of changing the height of the impedance adjustment circuit includes, for example, applying a solder resist a plurality of times, applying a plurality of times with a dispenser, applying a material having a different viscosity, and a high-frequency circuit.
- the entire chip may be covered with a sealing resin.
- the shape of the impedance adjustment circuit can be trimmed with a laser processing machine, and the characteristics can be adjusted after manufacturing.
- FIG. 38 shows a configuration of a high-frequency module according to a nineteenth embodiment.
- FIGS. 30A and 30B are a top view and a cross-sectional view of the relevant part.
- the high-frequency module according to the present embodiment includes a high-frequency circuit chip 102, a wiring board 103, and an impedance adjustment circuit 60. Note that the same components as those of the high-frequency module 101 of the eleventh embodiment are denoted by the same reference numerals, and description thereof is omitted.
- the impedance adjustment circuit 60 includes a silicon impedance adjustment element chip 61 having a convex portion 62 and a concave portion 63, and is flip-chip mounted in the same manner as the high-frequency circuit chip 102.
- a dielectric material using a solder resist is filled between the convex portion 62 of the impedance adjustment element chip 61 and the wiring portion 107 on the wiring substrate 103, the solder resist enters the gap due to capillary action.
- a pattern of layer 66 is formed.
- the convex portion 62 of the impedance adjustment circuit 60 needs to be in close contact with the wiring portion 107 on the wiring substrate 103. Therefore, it is desirable that the convex portion 62 has almost the same height as the bump formed as the input / output terminal 104.
- a top view and a cross-sectional view of the main part of the modification, the height and fixing of the impedance adjustment element chip 61 are, for example, bumps arranged at four corners. 64 may be used. Accordingly, the position in the height direction can be determined in advance, and the adhesion of the impedance adjustment circuit 60 to the wiring board 103 can be improved.
- FIG. 32 (a) and 32 (b) are diagrams illustrating a main part of the high-frequency module according to the twentieth embodiment of the present disclosure, in which FIG. 32 (a) is a top view and FIG. 32 (b) is FIG. It is AA sectional drawing of a).
- the impedance adjustment circuit 60 is configured to include a silicon impedance adjustment element chip 61 having a convex portion 62 and a concave portion 63 that is slightly smaller in concavity and convexity than the nineteenth embodiment, and the high frequency circuit chip 102. Similarly, flip chip mounting is performed. A dielectric layer using the same resin as the sealing resin 105 is filled between the convex portion 62 of the impedance adjustment element chip 61 and the wiring portion 107 on the wiring substrate 103.
- the high-frequency circuit chip 102 and the chip having the impedance adjustment circuit 60 are bump-mounted in the mounting process. Thereafter, in order to increase the mounting strength of each chip, the sealing resin 105 is injected between the chip and the substrate, and the sealing resin 105 is cured by heating in a furnace at a predetermined temperature and time.
- the sealing resin 105 is attached to the convex portion 62 of the impedance adjustment element chip 61.
- the seal filled between the high frequency circuit chip 102 and the wiring substrate 103 is used.
- a stop resin 105 is filled between the impedance adjustment element chip 61 and the wiring portion 107 of the wiring substrate 103.
- separated outside from the external connection terminal of the high frequency circuit chip 102 is formed. Further, as shown in FIGS. 33A and 33B, the sealing resin 105 is filled between the convex portion 62S of the impedance adjustment element chip 61 and the wiring portion 107 on the wiring substrate 103 so as to adhere to each other. The impedance may be relaxed by increasing the degree.
- FIG. 33 (a) and 33 (b) are diagrams showing a main part of the high-frequency module according to the twenty-first embodiment of the present disclosure.
- FIG. 33 (a) is a top view and
- FIG. 33 (b) is FIG. It is AA sectional drawing of a).
- the impedance adjustment circuit 60 is easy to adjust the pattern because the pattern of the dielectric layer is formed by the uneven pattern. Further, since the entire impedance adjustment element chip is fixed by the sealing resin, the adhesion is good. In addition, since the impedance adjustment element chip can be mounted simultaneously with the high frequency circuit chip, the mounting workability is good.
- the impedance adjustment element chip is arranged in the vicinity of the high-frequency circuit chip.
- the high-frequency module is modified.
- An impedance adjustment unit 60R that is electrically independent from the internal circuit of the high-frequency circuit chip 102 may be formed on a part of the peripheral edge of the chip and formed integrally.
- FIGS. 34 (a) and 34 (b) are a top view and a cross-sectional view of the main part of the high-frequency module of the present embodiment
- FIGS. 34 (c) and 34 (d) are the high-frequency of the present embodiment. It is the upper side figure and sectional drawing of a circuit chip.
- the impedance adjustment unit 60R is easy to adjust the pattern because the pattern of the recess 60c forms the pattern of the dielectric layer as the inverted pattern. Further, since the entire impedance adjusting element chip 61 is fixed by the sealing resin, the adhesion is good. In addition, since the impedance adjustment element chip can be mounted simultaneously with the high frequency circuit chip, the mounting workability is good.
- the impedance adjustment circuit is integrally formed on the wiring substrate.
- the impedance adjustment circuit (relaxation chip) is used as the component.
- the impedance adjustment circuit is realized by using the wiring shape on the wiring board 103 as shown in the top view of the main part of the high-frequency module of this embodiment in FIG. An example will be described.
- the impedance adjustment unit is formed by gradually narrowing the pattern of the wiring unit 107 itself on the wiring substrate 103 as the distance from the outside increases. Note that the same components as those of the high-frequency module 101 of the eleventh embodiment are denoted by the same reference numerals, and description thereof is omitted.
- the impedance adjustment unit of the present embodiment gradually increases in width from the position of the bump as the input / output terminal 104 of the high-frequency circuit chip 102, and the end of the sealing resin 105 (sealing end 105e) from the position of the input / output terminal 104. And a width that is the same as the wiring at a position separated by a predetermined distance L0.
- the length L0 of the gradually narrowing portion is approximately ⁇ g / 4 with respect to the wavelength of the signal frequency.
- Impedance discontinuity relaxes and VSWR approaches 1.
- the usual wiring pattern is gradually thinned under the high-frequency circuit chip as shown in FIG. 40 (a), or gradually in the region up to the sealing end 105e as shown in FIG. 40 (b). It has become thinner.
- FIG. 36A and FIG. 36B are a top view and a cross-sectional view of the main part of the high-frequency module according to the twenty-third embodiment of the present disclosure.
- the wiring portion 107 is connected via the wire WB, and the wire WB and the high frequency circuit chip 102 are covered by the sealing resin 105. Is called.
- the length L of the impedance adjustment circuit is determined by the position covered by the sealing resin 105 when the high-frequency circuit chip 102 is mounted.
- the angle of the sealing end 105e of the stop resin 105 is adjusted. Therefore, in the face-up mounting, even if the same high frequency circuit chip is used, the length of the impedance adjustment circuit is different.
- the same components as those of the high frequency module 101 of the eleventh embodiment are denoted by the same reference numerals, and the description thereof is omitted. Further, in the above-described embodiment, a part of the sealing resin 105 is cut out while maintaining impedance matching even after the end shape of the sealing resin 105 is adjusted so as to be a design value. Thus, impedance matching can be further improved.
- the wall portion may be formed of a resin having high viscosity, and the taper of the sealing end 105e may be adjusted. Further, the taper of the sealing end 105e can be adjusted by controlling the degree of sagging using the temperature profile in the step of curing the sealing resin.
- the impedance adjustment circuit is configured by the dielectric layer.
- the present invention is not limited to the dielectric layer.
- an SMT component that places the SMT component mounting position within the range of ⁇ g / 4 is used. It is also possible to adjust the length of the conductive paste for connection, or cut the dielectric layer by laser processing to adjust the shape and thickness.
- ⁇ Disclosure 1 of high-frequency module> A high frequency circuit chip; A wiring board having a wiring portion for connecting the input / output terminals of the high-frequency circuit chip; A high-frequency module filled with a sealing resin that covers at least a connection portion between the high-frequency circuit chip and the wiring portion, The wiring portion includes an impedance adjustment circuit outside the input / output terminal. High frequency module.
- ⁇ Disclosure 2 of high frequency module> A high frequency circuit chip; A wiring board having a wiring part for flip-chip connecting the input / output terminals of the high-frequency circuit chip; A high frequency module filled with a sealing resin between the wiring board and the high frequency circuit chip, The wiring portion includes an impedance adjustment circuit outside the input / output terminal. High frequency module.
- the high-frequency module according to disclosure 1 or 2 of the high-frequency module The impedance adjustment circuit is a dielectric layer having a predetermined width formed on the wiring portion at a position spaced apart from the input / output terminal by a predetermined distance. High frequency module.
- the high frequency module according to Disclosure 3 of the high frequency module The dielectric layer includes a plurality of dielectric patterns formed along the wiring portion. High frequency module.
- ⁇ Disclosure 5 of high-frequency module The high-frequency module according to disclosure 4 of the high-frequency module, The interval between the plurality of dielectric patterns increases as the distance from the high-frequency circuit chip increases. High frequency module.
- ⁇ Disclosure 6 of high-frequency module The high-frequency module according to disclosure 4 of the high-frequency module, The pattern area of the plurality of dielectric patterns decreases as the distance from the high frequency circuit chip increases. High frequency module.
- ⁇ Disclosure 7 of high frequency module The high-frequency module according to disclosure 4 of the high-frequency module, The film thickness of the plurality of dielectric patterns decreases as the distance from the high-frequency circuit chip increases. High frequency module.
- ⁇ Disclosure 9 of high frequency module The high-frequency module according to any one of disclosures 3 to 8 of the high-frequency module, The dielectric layer is formed so as to selectively cover a peripheral portion of the wiring constituting the wiring portion. High frequency module.
- the dielectric layer is configured using the same material as the sealing resin, High frequency module.
- the high-frequency module according to disclosure 2 or 3 of the high-frequency module The impedance adjustment circuit is mounted on the wiring portion outside the input / output terminal, and has an unevenness on the surface facing the wiring board, and an impedance adjustment element chip, A dielectric layer filled in the interface between the convex portion of the impedance adjustment element chip and the wiring portion; High frequency module.
- ⁇ Disclosure 12 of High Frequency Module The high-frequency module described in Disclosure 11 of the high-frequency module, The impedance adjustment element chip is formed integrally with the high-frequency circuit chip. High frequency module.
- ⁇ Disclosure 13 of high frequency module The high-frequency module described in Disclosure 11 of the high-frequency module, The convex portion has substantially the same height as the bump formed as the input / output terminal. High frequency module.
- the high-frequency module according to disclosure 1 or 2 of the high-frequency module The impedance adjustment circuit is a wiring portion on a wiring board, and the line width gradually increases outward from the input / output terminals of the high-frequency circuit chip to a position of approximately ⁇ g / 4 with respect to the wavelength ⁇ g of the signal frequency. Forming a taper portion to High frequency module.
- the high-frequency module according to disclosure 1 or 2 of the high-frequency module is a circuit chip for microwave or millimeter wave, High frequency module.
- ⁇ Disclosure 1 of High Frequency Module Substrate> A substrate, A high-frequency transmission line using a wiring portion formed on the substrate; An impedance adjustment circuit connected to the high-frequency transmission line, A wiring board for a high frequency module in which a high frequency circuit chip is mounted on a terminal portion of the high frequency transmission path, The impedance adjustment circuit is a wiring portion on a wiring board, and the line width gradually increases outward from the input / output terminals of the high-frequency circuit chip to a position of approximately ⁇ g / 4 with respect to the wavelength ⁇ g of the signal frequency.
- the high-frequency module substrate according to Disclosure 1 of the high-frequency module substrate is a circuit chip for microwave or millimeter wave, High frequency module substrate.
- the impedance adjustment circuit is provided on the wiring substrate, discontinuity due to impedance change can be reduced. For this reason, in the flip-flop connection, even if the circuit surface of the high frequency circuit chip is entirely covered with the sealing resin, the discontinuity due to the impedance change of the wiring on the wiring board can be reduced.
- the solder resist layer covering the wiring portion has a configuration having an opening in a part of the wiring portion, so that the high frequency characteristics are maintained, and the wiring A wiring board for a high-frequency module with high strength can be provided, and can be effectively applied to a main circuit configuration.
- the present disclosure can reduce impedance mismatch of the high-frequency module, provide a high-frequency module (for example, a wireless module) with a small transmission loss, and is useful as a wireless communication terminal.
- a high-frequency module for example, a wireless module
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Abstract
Description
図1(a)は、本開示の実施の形態1の高周波モジュール用の配線基板を用いた、高周波モジュールの要部構成を示す説明図(上面図)、図1(b)は配線方向によって切断した説明図(断面図)である。図2(a)は配線部の要部斜視図、図2(b)は図2(a)のA-A断面図、図3は高周波モジュールの全体概要図である。
従って、ソルダレジスト層5は、配線基板1上の配線部3と誘電体層4との接続強度を保つ役割も果たす。
図9は、本開示の実施の形態2の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図であり、表面実装型のチップ部品(SMT部品)2近傍のソルダレジスト層5のパターンを示す上面図である。
図11(a)および図11(b)は、本開示の実施の形態3の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図である。図11(a)は本開示の実施の形態3の高周波モジュール用の配線基板を用いた、高周波モジュールの要部構成を示す上面図、図11(b)は配線方向によって切断した断面図(A-A断面図)である。
図12(a)および図12(b)は、本開示の実施の形態4の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図である。図12(a)は本開示の実施の形態4の高周波モジュール用の配線基板を用いた、高周波モジュールの要部構成を示す上面図、図12(b)は配線方向によって切断した断面図(A-A断面図)である。
図13(a)および図13(b)は、本開示の実施の形態5の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図である。図13(a)は本開示の実施の形態5の高周波モジュール用の配線基板を用いた、高周波モジュールの要部構成を示す上面図、図13(b)は配線方向によって切断した断面図(A-A断面図)である。
図14は、本開示の実施の形態6の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図である。
図15は、本開示の実施の形態7の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図である。
以上のように、本開示は、SMT部品に直接接続されていない配線に対して、あるいは部品の電極、他の配線と接続しない配線に対しても適用可能である。
図17は、本開示の実施の形態8の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図である。
図18は、本開示の実施の形態9の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す図である。
図19(a)は、本開示の実施の形態10の高周波モジュール用の配線基板を用いた高周波モジュールの要部構成を示す説明図(上面図)、図19(b)は配線方向によって切断した説明図(A-A線断面図)である。図19(a)に示した高周波モジュールは、図1(a)に示した実施の形態1の高周波モジュール用の配線基板1上に設けられた表面実装型のSMT部品2の代わりに、アンテナエレメント10が設けられている。配線基板上の配線部3及びソルダレジスト層5は実施の形態1と同様である。なお、アンテナエレメント10の端と一番近いソルダレジスト層5の距離はλ/8以上であることが望ましい。
小型の無線モジュールでは、モジュール基板を構成する配線基板に、高周波回路チップ(例えば、無線IC)をフリップチップ実装する、又は、高周波回路チップをBGA(ボールグリッドアレイ)パッケージに1次実装した後に2次実装することでモジュール基板に搭載する。高周波回路チップあるいはBGAパッケージの配線基板への実装強度を高め、高周波回路チップの防塵、防湿特性を高めるために、配線基板と高周波回路チップあるいは、BGAパッケージとの間に封止樹脂が注入される。
Γ=(ZX-Z0)/(ZX+Z0)
を用いて求められる。ここで、ZXは被測定物のインピーダンス(Ω)、Z0は測定回路の特性インピーダンス(Ω)であり、一般には50Ωである。
リターンロス(dB)=-20xLOG|Γ|
となる。
(実施の形態11)
図21は、実施の形態1の高周波モジュール101の構成を示す説明図(斜視図)であり、図22(a)及び図22(b)は図21の断面図であり、図22(a)は高周波モジュールを配線方向によって、配線部107を含むように切断した場合のA-A断面図であり、図22(b)はB-B断面図である。高周波モジュール101は、高周波回路(マイクロ波又はミリ波用IC)チップ102がモジュール基板としての配線基板103に実装されて構成される。
VSWR=(1+|Γ|)/(1‐|Γ|)
Γ=(Z-Z0)/(Z+Z0)=V2/V1
Γ=(25-50)/(25+50)=-0.33
ここでVSWRは1.98となっている。ちなみにVSWRは2以下であればよい。
配線基板103の設計では、インピーダンスを考慮して、配線パターン及び誘電体パターンを設計し、ソルダレジストのパターンの大きさおよび位置を算出し、マスクを形成する。
次に本開示の実施の形態12の高周波モジュールについて説明する。
なお、前記実施の形態11では、図21、図22(a)および図22(b)において、インピーダンス調整回路106を配線基板103の配線部107上に1つずつ配置した例を示したが、図23に示すように、緩和構造を複数並べ、徐々にインピーダンスを変化させてもよい。
他部については前記実施の形態と同様であるため、ここでは説明を省略する。
次に本開示の実施の形態13の高周波モジュールについて説明する。
図24は、実施の形態13の高周波モジュールの要部を示す上面図である。
他部については前記実施の形態と同様であるため、ここでは説明を省略する。
次に本開示の実施の形態14の高周波モジュールについて説明する。図25は、実施の形態14の高周波モジュールの要部を示す上面図である。
次に本開示の実施の形態15の高周波モジュールについて説明する。図26は、実施の形態15の高周波モジュールの要部を示す上面図である。
さらに本実施の形態においても、前記実施の形態13と同様、3個の誘電体層のパターン36a、36b、36cは、高周波回路チップ102の入出力端子104から離間するに従って間隔C1、C2を徐々に広げて配置される。(C1<C2)。
次に本開示の実施の形態16の高周波モジュールについて説明する。
図27(a)~図27(c)は、実施の形態16の高周波モジュールの要部を示す図であり、図27(a)は上面図、図27(b)は図27(a)のA-A断面図である。
次に本開示の実施の形態17の高周波モジュールについて説明する。
図28(a)および図28(b)は、実施の形態17の高周波モジュールの要部を示す図であり、図28(a)は上面図、図28(b)は図28(a)のA-A断面図である。
(Ta>Tb>Tc)
次に本開示の実施の形態18の高周波モジュールについて説明する。
図29(a)および図29(b)は、実施の形態18の高周波モジュールの要部を示す図であり、図29(a)は上面図、図29(b)は図29(a)のA-A断面図である。
T1>T2>T3
例えば、誘電体パターンの間隔を徐々に変化させて複数並べても良いし、誘電体パターンの面積を徐々に変化させても良いし、三角形状のパターンを構成し、配線部を覆う幅を徐々に変化させても良い。
次に本開示の実施の形態19の高周波モジュールについて説明する。
以上説明してきた、実施の形態11乃至18では、インピーダンス調整回路を配線基板上に、一体的に形成する例について説明したが、本実施の形態では、部品としてインピーダンス調整回路(緩和チップ)60を搭載する構造について説明する。
次に本開示の実施の形態20の高周波モジュールについて説明する。
また、図32(a)および図32(b)に示すように、インピーダンス調整素子チップ61の凸部62と配線基板103上の配線部107との間に、封止樹脂105を充填することによって密着度を高め、インピーダンスの緩和を図る構成でも良い。図32(a)および図32(b)は、本開示の実施の形態20の高周波モジュールの要部を示す図であり、図32(a)は上面図、図32(b)は図32(a)のA-A断面図である。
次に本開示の実施の形態21の高周波モジュールについて説明する。
なお、前記実施の形態20では、インピーダンス調整素子チップ61の凸部62に封止樹脂105を付着させたが、本実施の形態では高周波回路チップ102と配線基板103との間に充填される封止樹脂105を、インピーダンス調整素子チップ61と配線基板103の配線部107との間全体に充填している。
次に本開示の実施の形態22の高周波モジュールについて説明する。
以上、実施の形態11乃至18では、インピーダンス調整回路を、配線基板上に、一体的に形成する例、実施の形態19乃至21では、インピーダンス調整回路を、部品としてインピーダンス調整素子(緩和チップ)を搭載する構造について説明したが、本実施の形態では、図35に本実施の形態の高周波モジュールの要部上面図を示すように、インピーダンス調整回路を配線基板103上の配線形状を用いて実現する例について説明する。
なお、実施の形態11の高周波モジュール101と同一の構成要素については同一の符号を用い、説明を省略する。
次に本開示の実施の形態23の高周波モジュールについて説明する。
以上、実施の形態11乃至22では、フリップフロップ実装によって高周波回路チップ102が配線基板103上に搭載される例について説明したが、本実施の形態では、フェースアップ接続によって高周波回路チップ102が搭載される場合について説明する。図36(a)および図36(b)に本開示の実施の形態23の高周波モジュールの要部の上面図および断面図を示す。
また、前記実施の形態では、封止樹脂105の端部の形状が設計値となるように調整して形成後であっても、インピーダンス整合をとりながら、封止樹脂105の一部を切除することで、更に、インピーダンス整合性を高めることも可能である。
高周波回路チップと、
前記高周波回路チップの入出力端子を接続する配線部を備えた配線基板と、
少なくとも前記高周波回路チップと前記配線部との接続部を覆う封止樹脂を充填した高周波モジュールであって、
前記配線部が、前記入出力端子の外側に、インピーダンス調整回路を備えた、
高周波モジュール。
高周波回路チップと、
前記高周波回路チップの入出力端子をフリップチップ接続する配線部を備えた配線基板と、
前記配線基板と前記高周波回路チップとの間に封止樹脂を充填した高周波モジュールであって、
前記配線部が、前記入出力端子の外側に、インピーダンス調整回路を備えた、
高周波モジュール。
上記高周波モジュールの開示1または2に記載の高周波モジュールであって、
前記インピーダンス調整回路は、前記入出力端子から外側に所定の距離を隔した位置において前記配線部上に形成された所定幅の誘電体層である、
高周波モジュール。
上記高周波モジュールの開示3に記載の高周波モジュールであって、
前記誘電体層は前記配線部に沿って形成された複数の誘電体パターンを備えた、
高周波モジュール。
上記高周波モジュールの開示4に記載の高周波モジュールであって、
前記複数の誘電体パターンの間隔は、前記高周波回路チップから外側に離れる程、大きくなる、
高周波モジュール。
上記高周波モジュールの開示4に記載の高周波モジュールであって、
前記複数の誘電体パターンのパターン面積は、前記高周波回路チップから外側に離れる程、小さくなる、
高周波モジュール。
上記高周波モジュールの開示4に記載の高周波モジュールであって、
前記複数の誘電体パターンの膜厚は、前記高周波回路チップから外側に離れる程、小さくなる、
高周波モジュール。
上記高周波モジュールの開示3に記載の高周波モジュールであって、
前記誘電体層と前記配線部との重なり領域の幅は、前記高周波回路チップから外側に離れる程、徐々に小さくなる、
高周波モジュール。
上記高周波モジュールの開示3乃至8のいずれかに記載の高周波モジュールであって、
前記誘電体層は、前記配線部を構成する配線の周縁部を選択的に覆うように形成された、
高周波モジュール。
上記高周波モジュールの開示3乃至9のいずれかに記載の高周波モジュールであって、
前記誘電体層は、前記封止樹脂と同一材料を用いて構成された、
高周波モジュール。
上記高周波モジュールの開示2または3に記載の高周波モジュールであって、
前記インピーダンス調整回路は、前記入出力端子の外側において、前記配線部上に搭載され、前記配線基板に対向する面に凹凸を有するインピーダンス調整素子チップと、
前記インピーダンス調整素子チップの凸部と前記配線部との界面に充填された誘電体層とを具備した、
高周波モジュール。
上記高周波モジュールの開示11に記載の高周波モジュールであって、
前記インピーダンス調整素子チップは、前記高周波回路チップと一体的に形成された、
高周波モジュール。
上記高周波モジュールの開示11に記載の高周波モジュールであって、
前記凸部は前記入出力端子として形成されるバンプとほぼ同一高さである、
高周波モジュール。
上記高周波モジュールの開示1または2に記載の高周波モジュールであって、
前記インピーダンス調整回路は、配線基板上の配線部であって、前記高周波回路チップの入出力端子から外方に、信号周波数の波長λgに対して概ねλg/4の位置まで徐々に線幅が増大するテーパ部を構成する、
高周波モジュール。
上記高周波モジュールの開示1または2に記載の高周波モジュールであって、
前記高周波回路チップは、マイクロ波又はミリ波用回路チップである、
高周波モジュール。
基板と、
前記基板上に形成された配線部を用いた高周波伝送路と、
前記高周波伝送路に接続されたインピーダンス調整回路とを備え、
前記高周波伝送路の端子部に、高周波回路チップを搭載する高周波モジュール用の配線基板であって、
前記インピーダンス調整回路は、配線基板上の配線部であって、前記高周波回路チップの入出力端子から外方に、信号周波数の波長λgに対して概ねλg/4の位置まで徐々に線幅が増大するテーパ部を構成する高周波モジュール用基板。
上記高周波モジュール用基板の開示1に記載の高周波モジュール用基板であって、
前記高周波回路チップは、マイクロ波又はミリ波用回路チップである、
高周波モジュール用基板。
2 表面実装型のチップ部品(SMT部品)
2a、2b 入出力端子
3、3s、3p 配線部
4 誘電体層
5 ソルダレジスト層
6 半田
7 裏面配線部
8、8c、8d、8p 開口部
8s 側面開口部
9 高周波ICチップ
9a、9b,9c 入出力端子
10 アンテナエレメント
101 高周波モジュール
102 高周波回路チップ
103 配線基板
104 入出力端子(バンプ)
105 封止樹脂
105e 封止端
106 インピーダンス調整回路
107 配線部
107e エッジ
108 グランド層
109 チップ配線
110 誘電体基板
16、26,36,46,56,166 インピーダンス調整回路
16a、16b、16c 誘電体層のパターン
60R インピーダンス調整部
61 インピーダンス調整素子チップ
62 凸部
63 凹部
Claims (12)
- 高周波伝送用の配線部と、
前記配線部上に形成されたソルダレジスト層と、
を備えた高周波モジュール用の配線基板であって、
前記ソルダレジスト層は、前記配線基板上に搭載されるチップ部品の入出力端子から所定の距離までの間にある領域では、前記配線部の一部に開口部を持つ、
高周波モジュール用の配線基板。 - 請求項1に記載の高周波モジュール用の配線基板であって、
前記開口部は、所定の間隔を隔てて形成された複数の開口を含む、
高周波モジュール用の配線基板。 - 請求項1に記載の高周波モジュール用の配線基板であって、
前記ソルダレジスト層の前記開口部は、ストライプ状のパターンによって構成され、前記配線部を所定の間隔によって覆う、
高周波モジュール用の配線基板。 - 請求項1に記載の高周波モジュール用の配線基板であって、
前記開口部は四角形である、
高周波モジュール用の配線基板。 - 請求項1に記載の高周波モジュール用の配線基板であって、
前記開口部は円形または楕円形である、
高周波モジュール用の配線基板。 - 請求項1に記載の高周波モジュール用の配線基板であって、
前記開口部は前記配線部の側面を含む、
高周波モジュール用の配線基板。 - 請求項2に記載の高周波モジュール用の配線基板であって、
前記開口部は、前記配線部に沿って形成され、前記配線部の電流方向に沿った端縁部を残して配線部上に配列された、
高周波モジュール用の配線基板。 - 請求項2に記載の高周波モジュール用の配線基板であって、
前記開口部の間隔は、前記配線部上において、伝送周波数のλg/8以下である、
高周波モジュール用の配線基板。 - 請求項2に記載の高周波モジュール用の配線基板であって、
前記開口部の配置間隔は、前記配線部に搭載される表面実装型のチップ部品の入出力端子から離れるに従って次第に小さく形成された、
高周波モジュール用の配線基板。 - 請求項1に記載の高周波モジュール用の配線基板であって、
前記開口部の幅は、前記配線部に搭載される表面実装型のチップ部品の入出力端子から離れるに従って次第に大きく形成された、
高周波モジュール用の配線基板。 - 請求項1に記載の高周波モジュール用の配線基板を用い、
前記配線部の一部に、入出力端子を介して搭載された表面実装型のチップ部品を有する、
高周波モジュール。 - 請求項1に記載の高周波モジュール用の配線基板を用い、
前記配線部は、マイクロ波又はミリ波伝送に用いる、
高周波モジュール。
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US14/123,702 US9431357B2 (en) | 2011-08-23 | 2012-08-23 | Wiring board and high frequency module using same |
CN201280024489.5A CN103563071B (zh) | 2011-08-23 | 2012-08-23 | 配线基板及使用配线基板的高频模块 |
JP2013529901A JP6001539B2 (ja) | 2011-08-23 | 2012-08-23 | 配線基板及びこれを用いた高周波モジュール |
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US (1) | US9431357B2 (ja) |
JP (1) | JP6001539B2 (ja) |
CN (1) | CN103563071B (ja) |
TW (1) | TWI593332B (ja) |
WO (1) | WO2013027409A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2014002765A1 (ja) * | 2012-06-29 | 2014-01-03 | 株式会社村田製作所 | 高周波信号線路 |
JP2016152287A (ja) * | 2015-02-17 | 2016-08-22 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
WO2020115978A1 (ja) * | 2018-12-06 | 2020-06-11 | ソニーセミコンダクタソリューションズ株式会社 | 伝送装置、印刷配線基板、並びに情報機器 |
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US9583811B2 (en) * | 2014-08-07 | 2017-02-28 | Infineon Technologies Ag | Transition between a plastic waveguide and a semiconductor chip, where the semiconductor chip is embedded and encapsulated within a mold compound |
EP4415157A1 (en) * | 2023-02-09 | 2024-08-14 | Universidad Carlos III de Madrid | External port |
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2012
- 2012-08-23 WO PCT/JP2012/005296 patent/WO2013027409A1/ja active Application Filing
- 2012-08-23 JP JP2013529901A patent/JP6001539B2/ja not_active Expired - Fee Related
- 2012-08-23 US US14/123,702 patent/US9431357B2/en not_active Expired - Fee Related
- 2012-08-23 TW TW101130640A patent/TWI593332B/zh not_active IP Right Cessation
- 2012-08-23 CN CN201280024489.5A patent/CN103563071B/zh not_active Expired - Fee Related
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JP2009267227A (ja) * | 2008-04-28 | 2009-11-12 | Sumitomo Metal Electronics Devices Inc | 半導体素子収納用パッケージとその製造方法 |
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WO2014002765A1 (ja) * | 2012-06-29 | 2014-01-03 | 株式会社村田製作所 | 高周波信号線路 |
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WO2020115978A1 (ja) * | 2018-12-06 | 2020-06-11 | ソニーセミコンダクタソリューションズ株式会社 | 伝送装置、印刷配線基板、並びに情報機器 |
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Also Published As
Publication number | Publication date |
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JPWO2013027409A1 (ja) | 2015-03-05 |
US20140091885A1 (en) | 2014-04-03 |
TWI593332B (zh) | 2017-07-21 |
US9431357B2 (en) | 2016-08-30 |
CN103563071A (zh) | 2014-02-05 |
JP6001539B2 (ja) | 2016-10-05 |
TW201315316A (zh) | 2013-04-01 |
CN103563071B (zh) | 2017-06-06 |
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