WO2022107590A1 - 配線基板および表示装置 - Google Patents
配線基板および表示装置 Download PDFInfo
- Publication number
- WO2022107590A1 WO2022107590A1 PCT/JP2021/040361 JP2021040361W WO2022107590A1 WO 2022107590 A1 WO2022107590 A1 WO 2022107590A1 JP 2021040361 W JP2021040361 W JP 2021040361W WO 2022107590 A1 WO2022107590 A1 WO 2022107590A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wiring
- conductive particles
- wiring board
- substrate
- main surface
- Prior art date
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Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/103—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by bonding or embedding conductive wires or strips
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/14—Mountings, e.g. non-detachable insulating substrates characterised by the material or its electrical properties
-
- 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
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
-
- 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
- H05K1/03—Use of materials for the substrate
- H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
-
- 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
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
-
- 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
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/183—Components mounted in and supported by recessed areas of the printed circuit board
-
- 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
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/381—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the substrate
-
- 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
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0263—Details about a collection of particles
- H05K2201/0272—Mixed conductive particles, i.e. using different conductive particles, e.g. differing in shape
-
- 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
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10106—Light emitting diode [LED]
-
- 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
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10128—Display
Definitions
- the present disclosure is a micro LED display device equipped with a substrate for forming a circuit wiring, a substrate on which an electronic element or a light emitting element is mounted, a microchip type light emitting diode (hereinafter, also referred to as " ⁇ LED") or the like as a light emitting element.
- the present invention relates to a wiring board that can be used for a board or the like of the above and a display device provided with the wiring board.
- Patent Documents 1 to 3 describe techniques for improving the conduction stability of wiring.
- the wiring board of the present disclosure includes a substrate having a main surface, a side surface, and an inclined surface connecting the main surface and the side surface, and wiring located over the main surface, the inclined surface, and the side surface.
- the wiring contains conductive particles having a higher content than the insulating component, and at least in the first corner portion between the main surface and the inclined surface and the second corner portion between the inclined surface and the side surface. It has a thickness equivalent to that of one of the conductive particles.
- the display device of the present disclosure includes the wiring board.
- the substrate has a configuration in which a plurality of light emitting elements are arranged in a matrix on one side of the main surface.
- the wiring contains conductive particles having a content (for example, 80% by weight or more) higher than that of the insulating component, so that the conductive particles come into contact with each other and / or melt. It will be easier to wear. As a result, it has good conductivity because it constitutes a conductive path network in which a large number of conductive particles are connected to each other by contact portions and / or fusion portions. Further, since the insulating component enters many gaps of the conductive path network, the insulating component functions as a binder, and the conductive path network is less likely to collapse.
- a content for example, 80% by weight or more
- the conductive particles containing more conductive paste for forming the wiring than the uncured insulating component improve the apparent viscosity and reduce the fluidity.
- the conductive paste even if the conductive paste is applied to the corners of the substrate, it is difficult for the conductive paste to flow down from the inclined surface and the side surface of the substrate, and it is difficult for the conductive paste to be interrupted at the corners.
- the wiring contains an insulating component made of a cured resin or the like that penetrates into the fine irregularities on the surface of the substrate and improves the adhesive force of the wiring, the wiring easily adheres firmly to the surface of the substrate.
- the wiring has a thickness of at least one conductive particle in the first corner portion and the second corner portion, the wiring width can be reduced and the thickness of the wiring can be reduced. As a result, the connectivity with the high-density wiring located on the main surface of the substrate is improved. Therefore, it is possible to provide a wiring board and a display device having wiring having good connectivity with high-density wiring and high conduction stability. Further, the amount of the conductive paste applied can be reduced.
- Another embodiment of the wiring board of the present disclosure is shown, and is a schematic partial enlarged cross-sectional view of a corner portion of a board having wiring. Another embodiment of the wiring board of the present disclosure is shown, and is a schematic partial enlarged cross-sectional view of a corner portion of a board having wiring. Another embodiment of the wiring board of the present disclosure is shown, and is a schematic partial enlarged cross-sectional view of a corner portion of a board having wiring. Another embodiment of the wiring board of the present disclosure is shown, and is a schematic partial enlarged cross-sectional view of a corner portion of a board having wiring.
- FIG. 1 It is a schematic partially enlarged cross-sectional view which shows the other embodiment of the wiring board of this disclosure, and explains the state which applied the conductive paste to the main surface of the roughened board.
- Another embodiment of the wiring board of the present disclosure is shown, and is a schematic partial enlarged cross-sectional view of a corner portion of a board having wiring. It is a graph which shows the relationship between the film thickness of the wiring on the main surface of a substrate, and the film thickness of the wiring on the inclined surface of the corner of a substrate. It is a graph which shows the relationship between the chamfer width of the inclined surface of the corner of a substrate, and the disconnection occurrence rate.
- Patent Document 1 is a lid substrate for a semiconductor package in which the constituent material of the substrate is ceramic
- Patent Document 2 is a chip resistor in which the constituent material of the substrate is alumina
- Patent Document 3 is a substrate of an electronic component whose constituent material of the substrate is ceramic. Since the surface of these ceramic substrates (also referred to as ceramic substrates) is not high, they have a high density, such as the glass substrate for the tying panel of ⁇ LED display devices that display high-definition images on a large screen. Not suitable for wiring boards on which wiring is formed. However, in the ceramic substrate, it is relatively easy to form the side wiring for conducting the front surface side and the back surface side via the side surface.
- the surface including the side surface of the ceramic substrate is a rough surface
- the side wiring obtained by firing the conductive paste is the ceramic substrate. It has the advantage that it adheres relatively firmly to the surface of the ceramic and is difficult to peel off.
- the surface of the glass substrate is high, it is easy to form high-density wiring with a small wiring width and a thin wiring thickness by using a thin film forming method such as the CVD (Chemical Vapor Deposition) method.
- CVD Chemical Vapor Deposition
- the side wiring of the glass substrate is to be formed by using the conductive paste, the side wiring is difficult to firmly adhere to the surface of the glass substrate and may be peeled off.
- the glass substrate of the side wiring is used. The adhesive force to the surface of the glass is further reduced, and it becomes easier to peel off.
- FIG. 1 is a partially enlarged cross-sectional view of a corner portion of a substrate having wiring, showing an example of the wiring board 1 of the embodiment according to the present disclosure.
- FIG. 2 is a partial cross-sectional view showing an end portion of the wiring board 1 shown in FIG.
- the wiring board 1 of the present embodiment has a main surface 2, a side surface 4 perpendicular to the main surface 2, a substrate 5 having an inclined surface 3 connecting the main surface 2 and the side surface 4, and the main surface 2 and the inclined surface 3.
- the corner portion 6 on which the side surface 4 is formed is provided with wiring (hereinafter, also referred to as side surface wiring) 7 located over the main surface 2, the inclined surface 3, and the side surface 4.
- the side wiring 7 contains the conductive particles 7p having a higher content than the insulating component 7i, and also includes the first corner portion 6a between the main surface 2 and the inclined surface 3 and the first corner portion 6a.
- the second corner portion 6b between the inclined surface 3 and the side surface 4 has a thickness equivalent to at least one conductive particle 7p.
- the wiring board 1 of the present embodiment has the following effects due to the above configuration. Since the wiring 7 contains the conductive particles 7p having a content (for example, 80% by weight or more) higher than that of the insulating component 7i, the conductive particles 7p are likely to come into contact with each other and / or fuse with each other. As a result, it has good conductivity because it constitutes a conductive path network in which a large number of conductive particles 7p are connected to each other by contact portions and / or fusion portions. Further, since the insulating component 7i enters many gaps of the conductive path network, the insulating component 7i functions as a coupling member (binder), and the conductive path network is less likely to collapse.
- a content for example, 80% by weight or more
- the apparent viscosity is improved by the conductive particles 7p in which the conductive paste 7s (shown in FIG. 8) for forming the wiring 7 is contained in a larger amount than the uncured insulating component 7ip (shown in FIG. 8). And the fluidity becomes smaller. As a result, even if the conductive paste 7s is applied to the corners of the substrate 5, it is difficult for the conductive paste 7s to flow down from the inclined surface 3 and the side surface 4 of the substrate 5, and it is difficult for the conductive paste 7s to be interrupted at the corners.
- the side wiring 7 contains an insulating component 7i made of a cured resin or the like that penetrates into fine irregularities on the surface of the substrate 5 and improves the adhesive force of the wiring 7, the wiring 7 is placed on the surface of the substrate 5. It becomes easy to adhere firmly. Further, since the wiring 7 has the thickness of at least one conductive particle 7p in the first corner portion 6a and the second corner portion 6b, the wiring width is reduced and the thickness of the wiring 7 is reduced. be able to. As a result, the connectivity with the high-density wiring located on the main surface 2 of the substrate 5 is improved. Therefore, it is possible to provide a wiring board 1 having wiring having good connectivity with high-density wiring and high conduction stability. Further, the amount of the conductive paste applied can be reduced.
- the board 5 may be a glass board. Since the surface of the glass substrate is high, it is easy to form high-density wiring suitable for display devices and the like. As for the glass substrate, an IC, a flexible printed circuit board (FPC), etc. are arranged on the back surface side, and a side wiring 7 is arranged on the side surface to provide high-density wiring on the front surface side and an IC on the back surface side. Can be electrically connected. That is, the glass substrate is suitable for forming the multifunctional wiring board 1.
- FPC flexible printed circuit board
- the glass material may be, for example, a material containing borosilicate glass, crystallized glass, quartz, or the like.
- the substrate 5 may be made of blue plate glass (soda glass) containing silicon oxide (SiO 2 ), sodium oxide (Na 2 O), and calcium oxide (CaO) as main components. Blue plate glass has the lowest melting point among glasses, is easy to process, and is inexpensive. Further, the substrate 5 may be composed of a white plate glass (non-alikari glass) containing silicon oxide (SiO 2 ), boric acid (B 2 O 3 ), and aluminum oxide (Al 2 O 3 ) as main components.
- White plate glass is inexpensive, has high transmittance in the wavelength range of visible light, ultraviolet light, and infrared light, and the upper limit of general normal use temperature is 120 ° C to 130 ° C, which is equivalent to that of blue plate glass.
- the substrate 5 may be made of quartz glass containing silicon oxide (SiO 2 ) as a main component. Quartz glass is a high-purity glass with few impurities, has a high transmittance for ultraviolet light and infrared light, and has a high heat resistant temperature. The upper limit of the normal operating temperature of quartz glass is about 900 ° C. In addition, quartz glass has excellent chemical resistance and is easy to perform such as drilling and cutting.
- the substrate 5 may be a sapphire glass (Al 2 O 3 single crystal) substrate (also referred to as a sapphire crystal substrate).
- Sapphire glass has a high moth hardness of 9, a heat resistant temperature of about 2000 ° C., a thermal conductivity of 42 W / mK (20 ° C.), and a number of glass thermal conductivity of 1.4 W / mK (20 ° C.). It is 10 times.
- the substrate 5 may be a resin substrate or a ceramic substrate. Further, the substrate 5 may be a composite type substrate in which a plurality of types of substrates among a glass substrate, a resin substrate and a ceramic substrate are laminated.
- the corner portion 6 of the substrate 5 has an inclined surface 3, and the width c of the inclined surface 3 may be 10 ⁇ m or more and 200 ⁇ m or less.
- the width c is less than 10 ⁇ m, the wiring 7 is likely to be broken as shown in FIG.
- the width c exceeds 200 ⁇ m, the inclined surface 3 may enter the arrangement region of the high-density wiring, the electronic element, the light emitting element, etc. formed on the main surface 2 of the substrate 5.
- the substrate 5 is a substrate for a display device such as a micro LED display device, the inclined surface 3 may enter the display unit.
- the inclined surface 3 may be a convex curved surface. In this case, the angle formed by the main surface 2 and the inclined surface 3 in the first corner portion 6a becomes smaller, and the wiring 7 is less likely to be interrupted at the first corner portion 6a.
- the inclined surface 3 may be a curved surface such as a partially spherical surface, a partially elliptical surface, or a partially cylindrical surface. The same effect is obtained for the second corner portion 6b.
- the inclined surface 3 may be a convex composite surface composed of a plurality of flat surfaces.
- the inclined surface 3 may be a concave curved surface. In this case, the conductive paste is less likely to flow down from the inclined surface 3 to the side surface 4.
- the inclined surface 3 may be a curved surface such as a partially spherical surface, a partially elliptical surface, or a partially cylindrical surface.
- the inclined surface 3 may be a concave composite surface composed of a plurality of flat surfaces.
- the thickness t of the wiring 7 may be 2 ⁇ m or more and 10 ⁇ m or less.
- the thickness t of the first corner portion 6a and the second corner portion 6b of the wiring 7 is 0.4 ⁇ m, which is the thickness of one conductive particle 7p. It tends to be less than (thickness in the case of FIG. 4).
- the wiring 7 is likely to be interrupted at the first corner portion 6a and the second corner portion 6b.
- the thickness t exceeds 10 ⁇ m, as shown in FIG.
- the thickness t of the first corner portion 6a and the second corner portion 6b of the wiring 7 is 1.6 ⁇ m, which is the thickness of two conductive particles 7p (the thickness t).
- the thickness in the case of FIG. 7) tends to be exceeded.
- the thickness of the side wiring 7 on the main surface 2 of the substrate 5 tends to increase, and the connectivity with the high-density wiring located on the main surface 2 tends to deteriorate.
- the substrate 5 may have various shapes such as a triangle, a rectangle (square, rectangle), a trapezoid, a circle, an ellipse, an oval, and a polygon such as a pentagon.
- the main surface 2 of the substrate has a first main surface 2a and a second main surface 2b on the opposite side of the first main surface 2a.
- a side surface 4 connecting the first main surface 2a and the second main surface 2b is located between the end edge of the first main surface 2a and the end edge of the second main surface 2b.
- the side surface 4 may be located at right angles to the first main surface 2a and the second main surface 2b, but may not necessarily be at right angles.
- the side surface 4 may be positioned at an angle of about ⁇ (more than 0 ° and 20 ° or less) with respect to the first main surface 2a and the second main surface 2b.
- the wiring board 1 of the present embodiment is, for example, a micro LED display device (hereinafter, also referred to as “ ⁇ LED display device”) in which microchip type light emitting diodes (hereinafter, also referred to as “ ⁇ LED”) are arranged in a matrix. A plurality of them are arranged in a plane and their side surfaces are connected (tiled) to be used as a substrate for one large tying panel (also referred to as a multi-display).
- ⁇ LED display device micro LED display device
- ⁇ LED microchip type light emitting diodes
- the above ⁇ LED display device has, for example, the following configuration. That is, the drive system unit (also referred to as the drive unit) of the panel such as the IC and the flexible wiring board is arranged on the second main surface 2b which is the back surface of the substrate 5, and the frame region near the edge of the first main surface 2a and the frame region and Electrode pads connected to the side surface wiring 7 are arranged in the frame region near the edge of the second main surface 2b.
- a wiring portion 7c for connecting the electrode pad on the first main surface 2a side and the electrode pad on the second main surface 2b side is arranged, and the wiring portion 7a and the first on the first main surface 2a side.
- the wiring portion 7b on the main surface 2b side is electrically connected via the wiring portion 7c. That is, the side wiring 7 is composed of wiring portions 7a, 7b, 7c. Further, on the first main surface 2a (display side surface) of the ⁇ LED display device, a plurality of pixel portions including a pixel circuit including a ⁇ LED and a thin film transistor (TFT) for driving and controlling the emission of the ⁇ LED and the ⁇ LED are provided. They are arranged in a matrix.
- TFT thin film transistor
- the drive unit may be, for example, a drive element such as an IC or LSI mounted on the second main surface 2b of the substrate 5 by a COG (Chip On Glass) method.
- the drive unit is made of low-temperature polycrystalline silicon (LTPS) formed on the second main surface 2b of the substrate 5 by a thin film forming method such as a chemical vapor deposition (CVD) method. It may be a thin film circuit including a thin film transistor (TFT) having a semiconductor layer.
- the drive unit may be a drive element provided on the flexible wiring board connected to the external connection terminal located on the second main surface 2b of the substrate 5. Further, the drive unit may be an external drive element electrically connected to the wiring of the flexible wiring board.
- the plurality of pixel portions 7a are located on the first main surface 2a.
- the plurality of pixel portions 7a are arranged in a matrix with a predetermined pixel pitch.
- the pixel pitch may be, for example, about 50 ⁇ m to 500 ⁇ m, 100 ⁇ m to 400 ⁇ m, or 380 ⁇ m.
- Each pixel portion 7a is electrically connected to a drive system portion on the second main surface 2b side via an electrode pad and side wiring 7.
- ⁇ LEDs as a plurality of light emitting elements are arranged in a matrix on one main surface side of the substrate 5, and on the other main surface side of the substrate 5, the plurality of ⁇ LEDs are connected to the plurality of ⁇ LEDs via wiring 7.
- It may be configured to have an electrically connected drive unit.
- the drive unit since the drive unit is on the side of the second main surface 2b of the substrate 5, the drive unit is not visible to the viewer when the multi-display is configured, and the image display is not hindered. It has a beneficial effect.
- it is not necessary to arrange the drive unit in the frame portion of the ⁇ LED display device it becomes easy to narrow the frame of the ⁇ LED display device and eliminate the frame. Similarly, it becomes easy to narrow the frame of the multi-display and eliminate the frame.
- 3A to 3C are cross-sectional views showing a difference in the shape of the wiring 7 depending on the shape of the corner portion 6 of the substrate 5.
- the side wiring 7 when the angle between the main surface 2 and the side surface 4 of the corner portion 6 of the substrate 5 is a right angle and the corner (tip of the edge) is sharply pointed, the side wiring 7 The thickness t is approximately 0 ⁇ m on the corner portion 6, and the wire is easily broken. Further, the thickness t of the side wiring 7 is less than 10 ⁇ m on the main surface 2 and the side surface 4, and the connectivity with the high-density wiring located on the main surface 2 is good, but the continuity of the side wiring 7 is as described above. It is easy to deteriorate.
- the thickness t of the side wiring 7 is set to 10 ⁇ m or more on the main surface 2 and the side surface 4, and the thickness of the corner portion 6 is increased to some extent. can get.
- the connectivity between the high-density wiring located on the main surface 2 and the side wiring 7 tends to deteriorate, and the manufacturing cost of the side wiring 7 increases.
- the arrangement substrate 1 of the present embodiment has an inclined surface 3 formed by chamfering the corners 6 or the like.
- the width c of the inclined surface 3 is preferably set to 10 ⁇ m or more and 200 ⁇ m or less. When the width c is less than 10 ⁇ m, the wiring 7 is likely to be broken as described above. When the width c exceeds 200 ⁇ m, the inclined surface 3 may enter the arrangement region and the display portion of the high-density wiring, the electronic element, the light emitting element, etc. formed on the main surface 2 of the substrate 5 as described above.
- the inclined surface 3 in the wiring board 1 of the present embodiment may have an inclination angle of 30 ° or more and 60 ° or less with respect to the main surface 2 and an inclination angle of 30 ° or more and 60 ° or less with respect to the side surface 4.
- the surface roughness of the main surface 2 of the substrate 5 was defined as the first surface roughness Ra1
- the surface roughness of the inclined surface 3 was defined as the second surface roughness Ra2
- the surface roughness of the side surface 4 was defined as the third surface roughness Ra3.
- at least two of Ra1, Ra2 and Ra3 may be different from each other.
- the main surface is an insulating component 7ip composed of an uncured epoxy resin or the like contained in the conductive paste 7s. It penetrates into the fine irregularities of 2 and the adhesive force due to the intramolecular force increases.
- the conductive particles 7p contained in the conductive paste 7s are caught on the fine irregularities of the main surface 2, so that the conductive paste 7s does not easily flow in the surface direction dp of the main surface 2.
- the adhesive force of the conductive paste 7s to the main surface 2 is further increased.
- Ra2 may be larger than Ra1.
- the conductive paste 7s applied to the inclined surface 3 tends to flow down to the side surface 4 due to the influence of gravity, but by increasing the adhesive force of the conductive paste 7s to the inclined surface 3, the conductive paste 7s It is possible to suppress the flow of paste.
- Ra3 may be larger than Ra2.
- the conductive paste 7s applied to the side surface 4 tends to flow down due to the direct influence of gravity, but the conductive paste 7s flows down by increasing the adhesive force of the conductive paste 7s to the side surface 4. Can be suppressed.
- Ra2 may be larger than Ra1 and Ra3 may be larger than Ra2 (Ra3> Ra2> Ra1).
- Ra1 may be about 1 nm to 100 nm
- Ra2 may be about 50 nm to 200 nm
- Ra3 may be about 100 nm to 500 nm.
- Ra3 Ra2> Ra1 may be satisfied. Also in this case, by increasing the adhesive force of the conductive paste 7s to the inclined surface 3 and increasing the adhesive force of the conductive paste 7s to the side surface 4, it is possible to further suppress the run-off of the conductive paste 7s.
- the surface roughness is adjusted by adjusting the size of the count (average particle size) of the abrasives such as alumina abrasives and diamond abrasives when grinding the surface to be ground. It can be carried out. For example, when a grinding device that grinds the surface to be ground by the side surface of a rotating disk-shaped grinding member is used, the size of the count (average particle size) of the abrasive material fixed to the side surface of the grinding member is determined. Adjust so that the desired arithmetic average roughness is obtained on the ground surface.
- the length of the inclined surface 3 in the wiring board 1 in the direction along the ridgeline direction of the first corner portion 6a is larger than the length in the direction orthogonal to the ridgeline direction.
- the configuration may be such that the long linear or strip-shaped recesses are included in the rough surface. In the case of this configuration, the linear or strip-shaped recess becomes a long step portion in the direction orthogonal to the direction in which the conductive paste 7s flows down. As a result, it is possible to effectively suppress the run-off of the conductive paste 7s on the inclined surface 3.
- the rotation direction (tangential direction) of the side surface of the grinding member is the direction along the ridge line direction of the first corner portion 6a. It can be formed by setting so as to be.
- a large number of linear or band-shaped recesses may be formed on the entire surface of the inclined surface 3.
- the length of the linear or strip-shaped recess may be about 1 ⁇ m to 100 ⁇ m in the lateral direction, the length in the longitudinal direction may be about 10 ⁇ m to 200 ⁇ m, and the length in the longitudinal direction is the length in the lateral direction. It may be more than 1 times and less than 10 times, but is not limited to these ranges.
- the linear or band-shaped recesses may have a depth of about 30 nm to 100 nm, but are not limited to this range.
- a conductive paste 7s containing conductive particles 7p such as Ag particles, a resin component composed of an uncured epoxy resin, alcohol such as ethyl alcohol, and water is applied to the main surface of the substrate 5.
- the side wiring 7 can be formed by printing and applying the coated conductive paste 7s on the inclined surface 3 and the side surface 4 and then firing the applied conductive paste 7s.
- the conductive paste 7s may contain glass frit. If there is no inclined surface 3 at the corner of the substrate 5, for example, when the Ag paste 7s as the conductive paste 7s is screen-printed on the edge portion and the side surface 4 of the main surface 2, the Ag paste 7s is uniformly applied at the corner portion. It is extremely difficult to apply it as a thick thickness.
- the conductive paste 7s tends to adhere to the corners of the substrate 5 with an extremely thin thickness that deteriorates the conductivity, or the substrate 5 tends to adhere to the corners of the substrate 5 in an exposed state in some places.
- the inclined surface 3 is formed on the corner portion 6 between the main surface 2 and the side surface 4 of the substrate 5 by chamfering or the like.
- the side wiring 7 can be formed by printing and coating a conductive paste 7s such as Ag paste on the main surface 2, the side surface 4, and the inclined surface 3 and firing the paste.
- the Ag paste has, for example, an Ag weight ratio of 85 wt% (% by weight) containing solid content and volatile components before curing at the time of printing, and an Ag weight ratio of only the solid content after curing is 95 wt%.
- the particle size (average particle size) of the conductive particles 7p before firing may be about 0.8 ⁇ m to 3.0 ⁇ m, but is not limited to this value.
- the particle size of the conductive particles 7p before firing may be about 0.1 ⁇ m to 10.0 ⁇ m.
- the particle size of the conductive particles 7p before firing is less than 0.1 ⁇ m, when the conductive particles 7p are fired, a large number of the conductive particles 7p are easily integrated into a layered body.
- the insulating component 7i made of a cured resin or the like also becomes a layered body, and these layered bodies tend to separate and the wiring 7 tends to peel off.
- the particle size of the conductive particles 7p before firing exceeds 10.0 ⁇ m, the wiring width and thickness of the side wiring 7 tend to increase, and the connectivity with high-density wiring tends to deteriorate.
- the conductive particles 7p may include spherical particles and irregular particles such as flakes.
- the amorphous particles have a large surface area, the heat absorption area increases, and since they are easily melted during firing, they tend to be fused portions connecting the spherical particles.
- the conductive particles 7p may be a dense body and / or a hollow body. Since the conductive particles 7p made of a hollow body have a small heat capacity, they are easily melted and deformed as shown in FIGS. 4 and 5, and because they are easily melted during firing, they tend to be fused portions connecting spherical particles.
- the side wiring 7 may have a configuration in which the content of the conductive particles 7p is 80% by weight or more.
- the effect of improving the apparent viscosity and reducing the fluidity is improved by the conductive particles 7p in which the conductive paste 7s for forming the side wiring 7 is contained in a larger amount than the uncured insulating component 7ip. do.
- the content of the conductive particles 7p in the side wiring 7 may be 90% by weight or more, or 95% by weight or more.
- the side surface wiring 7 comprises conductive particles 7s containing conductive particles such as Ag, Cu, Al, and stainless steel, an uncured resin component such as an epoxy resin, an alcohol solvent, water, and the like, and the side surface 4 to the first surface 2a and the side surface wiring 7. It can be formed by a method such as a heating method, a photocuring method of curing by light irradiation such as ultraviolet rays, a photocuring heating method, or the like after printing and coating on a desired portion on the second surface 2b.
- the side wiring 7 can also be formed by a thin film forming method such as a plating method, a vapor deposition method, or a CVD method.
- a groove may be formed in advance at a portion of the side surface where the side wiring 7 is formed.
- the conductive paste 7s serving as the side wiring 7 can be easily arranged at a desired portion on the side surface 4.
- a coating layer (overcoat layer) made of a resin material or the like may be provided to cover and protect the side wiring 7.
- the conductive particles 7p have a major axis and a minor axis
- the side wiring 7 has at least the minor axis of the conductive particles 7p in the first corner portion 6a and the second corner portion 6b. It may be configured to have the thickness of.
- the conductive particles 7p When the side wiring 7 is formed by applying the conductive paste 7s and firing, the conductive particles 7p have a major axis such as a flat shape or an ellipsoidal shape due to melt deformation, fusion, and own weight during firing. It is easy to deform into a shape with. Even when the conductive particles 7p are hollow, they are easily deformed into a shape having a major axis and a minor axis.
- the direction of the major axis of the conductive particles 7p tends to be substantially parallel to the surface direction of the surface of the substrate 5. Therefore, in the first corner portion 6a and the second corner portion 6b of the substrate 5, the wiring 7 having at least the thickness corresponding to the minor diameter of the conductive particles 7p is formed. In the case of this configuration, the thickness of the side wiring 7 can be made thinner. As a result, the connectivity with the high-density wiring located on the main surface 2 of the substrate 5 is further improved. Further, the coating amount of the conductive paste 7s can be reduced.
- the short diameter (referred to as r1) of the conductive particles 7p may be about r / 2 when the conductive particles 7p before firing are spherical in diameter r.
- r1 may be about 0.4 ⁇ m.
- 0.1r ⁇ r1 ⁇ 0.9r may be used. It may be 0.3r ⁇ r1 ⁇ 0.7r.
- the side wiring 7 may have a thickness of 5 or less of the conductive particles 7p in the first corner portion 6a and the second corner portion 6b. ..
- This configuration is based on the phenomenon that the conductive particles 7p are difficult to be stacked because the conductive particles 7p are difficult to come into contact with each other and are difficult to fuse in the first corner portion 6a and the second corner portion 6b.
- the conductive paste 7s has improved apparent viscosity and reduced fluidity, even if the above phenomenon occurs, the conductive particles 7p are formed in the first corner portion 6a and the second corner portion 6b. About 5 pieces can be stacked. In the case of this configuration, the thickness can be kept thin while reducing the resistance of the side wiring 7. As a result, the connectivity with the high-density wiring located on the main surface 2 of the substrate 5 is improved.
- the side wiring 7 may have a thickness of four or less of the conductive particles 7p in the first corner portion 6a and the second corner portion 6b. That is, as shown in FIG. 10, four conductive particles 7p having an inclined surface 3 having an inclined angle of 45 ° and a side wiring 7 having a corner film thickness of about 1.6 ⁇ m (minor axis of 0.4 ⁇ m). This is because the thickness of the flat surface portion of the side wiring 7 is about 10 ⁇ m, which is a suitable upper limit.
- the side wiring 7 may have a thickness of two or less of the conductive particles 7p in the first corner portion 6a and the second corner portion 6b.
- the thickness of the first corner portion 6a and the second corner portion 6b of the side wiring 7 may be about 1.6 ⁇ m.
- the side wiring 7 may have a thickness of 6 or more of the conductive particles 7p at the first corner portion 6a and the second corner portion 6b, but in this case, the side wiring on the main surface 2 of the substrate 5
- the thickness of 7 tends to increase, and the connectivity with the high-density wiring located on the main surface 2 tends to deteriorate. In addition, it tends to be difficult to reduce the coating amount of 7s.
- the side wiring 7 may have a thickness of about 0.4 ⁇ m to 1.6 ⁇ m in the first corner portion 6a and the second corner portion 6b. Further, when the particle size of the conductive particles 7p before firing is 3.0 ⁇ m, as shown in FIGS. 4 to 7, the side wiring 7 has 1. It may have a thickness of about 5 ⁇ m to 6.0 ⁇ m. Therefore, the side wiring 7 may have a thickness of about 0.4 ⁇ m to 6.0 ⁇ m in the first corner portion 6a and the second corner portion 6b.
- the conductive particles 7p are spherical in diameter r, and the side wiring 7 has a thickness of at least the diameter r of the conductive particles 7p in the first corner portion 6a and the second corner portion 6b.
- It may be a configuration that is used. In this case, it corresponds to the case where the conductive particles 7p are hardly deformed by firing under the conditions that the melting point of the conductive particles 7p is high, the conductive particles 7p are dense, the firing temperature is low, and the firing time is short.
- the thickness of the first corner portion 6a and the second corner portion 6b of the side wiring 7 may be about 0.8 ⁇ m.
- the side wiring 7 has a configuration in which conductive particles 7p having a major axis and a minor axis shown in FIGS. 4 and 5 and spherical conductive particles 7p shown in FIGS. 6 and 7 are mixed. May be good.
- the conductive particles 7p may include a first conductive particle and a second conductive particle, and the size of the first conductive particle may be larger than the size of the second conductive particle.
- a large number of first conductive particles form a conductive path network in which a large number of first conductive particles are connected to each other by a contact portion and / or a fusion portion, and the second conductive particles enter the gaps of the conductive path network to form a conductive path. It is possible to reinforce the network and improve the conductivity of the conductive path network.
- the size of the first conductive particles may be more than 1 times and 10 times or less the size of the second conductive particles, but is not limited to this range.
- the size (diameter) of the first conductive particles may be 0.4 ⁇ m to 1.6 ⁇ m
- the size (diameter) of the second conductive particles may be 0.04 ⁇ m or more and less than 1.6 ⁇ m.
- the size of the conductive particles may be specified by the diameter if the conductive particles are spherical, and may be specified by the major axis (maximum diameter) if the conductive particles have a major axis and a minor axis such as an ellipsoidal shape.
- the size of the first conductive particles is larger than the size of the second conductive particles, and the density of the first conductive particles is higher than the density of the second conductive particles. May be good.
- the first conductive particles having a high density (heavy specific gravity) rapidly settle and deposit, and the second low density (light specific gravity).
- the conductive particles of the above can easily enter the gaps of the sedimentary layer made of the first conductive particles.
- the second conductive particles can enter the gaps of the conductive path network to reinforce the conductive path network and further improve the conductivity of the conductive path network.
- the densities (g / cm 3 ) of various metals are 21.45 for platinum (Pt), 19.32 for gold (Au), 19.30 for tungsten (W), 10.50 for silver (Ag), 10.22 for molybdenum, and copper.
- Cu 8.96, nickel (Ni) 8.90, niobium (Nb) 8.57, iron (Fe) 7.87, tin (Sn) 7.31, indium (In) 7.31, chromium (Cr) 7.20, zinc ( Zn) is 7.13, titanium (Ti) is 4.54, aluminum (Al) is 2.70, and magnesium (Mg) is 1.74. Therefore, for example, the first conductive particles may be made of silver and the second conductive particles may be made of a silver-copper alloy.
- the size of the first conductive particles is larger than the size of the second conductive particles, and the resistivity ( ⁇ m) of the second conductive particles is larger than the resistivity of the first conductive particles. It may have a low configuration. In other words, the conductivity of the second conductive particles (S / m: Siemens per meter) may be higher than that of the first conductive particles. In this case, the second conductive particles can enter the gaps of the conductive path network to reinforce the conductive path network and further improve the conductivity of the conductive path network. For example, silver has a resistivity of 15.87 (n ⁇ m) and copper has a resistivity of 16.78 (n ⁇ m).
- the first conductive particles may be made of a silver-copper alloy and the second conductive particles may be made of silver.
- FIG. 10 shows the film thickness of the wiring portions 7a and 7b of the side wiring 7 on the main surface 2 (the film thickness of the flat surface portion) and the film thickness of the wiring portion 7c of the side wiring 7 on the corner portion (first corner portion 6a). It is a graph which shows the relationship with (corner film thickness).
- Is data showing the relationship between the thickness of the square portion and the thickness of the flat portion when the inclined surface 3 is a C surface having a chamfer angle ⁇ 1 45 ° with respect to the main surface 2.
- the reference numeral "x" is data having a configuration in which the inclined surface 3 coincides with the side surface 4 (a configuration in which the inclined surface 3 does not exist).
- the conductive particles used in the conductive paste 7s have an average particle size ( ⁇ ) of 0.8 ⁇ m to 3.0 ⁇ m, and the corner film thickness is less than about 1/2 (0.4 ⁇ m) of the average particle size. With the film thickness, it becomes difficult for conductive particles to exist, and it becomes difficult to obtain stable conduction of the side wiring 7.
- the film thickness at which stable conduction can be obtained is 11.8 ⁇ m with a flat surface film thickness of 10 ⁇ m or more, and the square film thickness is 0. It is 9 ⁇ m. Further, when the chamfer width c is 30 ° to 60 °, the film thickness at which stable conduction can be obtained is 2 ⁇ m to 7 ⁇ m for the flat surface portion and 0.4 ⁇ m to 1.45 ⁇ m for the corner portion. ..
- FIG. 11 is a graph showing the relationship between the chamfer width and the disconnection occurrence rate of the side wiring 7.
- the vertical axis is the disconnection occurrence rate
- the horizontal axis is the chamfer width.
- the adhesive force of the conductive paste 7s for forming the side wiring 7 and the surface roughness of the substrate 5 will be described.
- the adhesive force of the conductive paste 7s on the main surface 2, the inclined surface 3 and the side surface 4 is the same.
- the adhesive force of the conductive paste 7s is mainly generated by the intramolecular force acting between the liquid component and the unevenness when the liquid component of the conductive paste 7s enters the fine irregularities on the surface of the substrate 5.
- the conductive paste 7s tends to flow down due to gravity Fg, but the adhesive force becomes a drag force against the force to flow down.
- the drag force Fk on the main surface 2, the inclined surface 3, and the side surface 4 is also the same.
- the force to flow down may be larger than the drag force, and at least one part of the conductive paste 7s may flow down, but such a case is not taken into consideration. ..
- the force F1 represented by the following equation (1) acts on the conductive paste 7s.
- the force F2 represented by the following equation (2) acts on the conductive paste 7s.
- the force F3 represented by the following equation (3) acts on the conductive paste 7s.
- the surface roughness (arithmetic mean roughness) of the main surface 2, the inclined surface 3, and the side surface 4 of the substrate 5 is different.
- the adhesive force of the conductive paste 7s on each of the surface 2, the inclined surface 3 and the side surface 4 can be adjusted. That is, as shown in FIG. 8, when the conductive paste 7s is applied to the surface of the roughened main surface 2 and the like, the uncured insulating component 7ip contained in the conductive paste 7s becomes fine irregularities on the surface. It penetrates and the adhesive force due to the intramolecular force increases.
- the conductive particles 7p contained in the conductive paste 7s are caught on the fine irregularities on the surface, so that the conductive paste 7s is less likely to flow in the surface direction dp of the surface.
- the effect of increasing the adhesive force of the conductive paste 7s on the surface can be obtained.
- Fk1 the drag force on the main surface 2
- Fk2 the drag force on the inclined surface 3
- Fk3 the drag force on the side surface 4
- Fk3> Fk2> Fk1 can be obtained.
- F3 ⁇ F2 ⁇ F1 is set, and the conductive paste 7s is less likely to flow down in the vicinity of the inclined surface 3 and both sides thereof. Therefore, it is possible to prevent the conductive paste 7s from being interrupted in the vicinity of the inclined surface 3 and both sides thereof, or being thinned to the extent that the conductivity is deteriorated.
- the difference ( ⁇ F2, S2)-( ⁇ F3, S3) of the forces ⁇ F2, S2, ⁇ F3, and S3 acting on the inclined surface 3 and the side surface 4 becomes small, and the conductive paste 7s does not easily flow down from the inclined surface 3.
- the film thickness of the conductive paste 7s can be easily controlled because the fluidity or viscosity of the entire conductive paste 7s differs depending on the intermolecular force of the liquid resin component excluding the conductive particles which are the solid content thereof. It is preferable to adjust the fluidity or viscosity.
- the wiring 7 is provided with a conductive paste 7s containing conductive particles such as Ag, Cu, Al, and stainless steel, an uncured resin component, an alcohol solvent, water, and the like, and the first main surface of the substrate 5.
- the inclined surface 3 may be an R surface curved outwardly.
- the contact area with the conductive paste 7s is larger than that of the C surface, and the adhesive force of the conductive paste 7s to the inclined surface 3 is also large.
- the film thickness of the wiring 7 can be further increased to reduce the occurrence of disconnection even in high-density wiring and to further improve the conduction stability.
- the wiring board of the present disclosure can be applied to a light emitting display device such as an LED display device and an organic EL display device, and a display device such as a liquid crystal display device. Further, the display device using the wiring board of the present disclosure can be applied to various electronic devices.
- the electronic devices include a complex and large display device (multi-display), an automobile route guidance system (car navigation system), a ship route guidance system, an aircraft route guidance system, a smartphone terminal, a mobile phone, a tablet terminal, and a personal digital assistant.
- PDAs video cameras, digital still cameras, electronic notebooks, electronic books, electronic dictionaries, personal computers, copying machines, terminal devices for game devices, televisions, product display tags, price display tags, industrial programmable display devices, Car audio, digital audio players, facsimiles, printers, automatic cash deposit and payment machines (ATMs), vending machines, head-mounted displays (HMDs), digital display watches, smart watches, etc.
- ATMs automatic cash deposit and payment machines
- HMDs head-mounted displays
- digital display watches smart watches, etc.
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Abstract
Description
前記基板は、一方の前記主面の側に、複数の発光素子がマトリクス状に位置している構成である。
2 主面
2a 第1主面
2b 第2主面
3 傾斜面
4 側面
5 基板
6 角部
7 配線(側面配線)
7a 配線部
7b 配線部
7c 配線部
7s 導電性ペースト
c 面取り幅
t 膜厚
Ra1 第1表面粗さ
Ra2 第2表面粗さ
Ra3 第3表面粗さ
θ1 面取り角度
Claims (18)
- 主面と、側面と、前記主面と前記側面とを繋ぐ傾斜面と、を有する基板と、
前記主面、前記傾斜面および前記側面にわたって位置する配線と、を備え、
前記配線は、絶縁性成分よりも含有量が多い導電性粒子を含むとともに、前記主面と前記傾斜面間の第1角部および前記傾斜面と前記側面間の第2角部において、少なくとも前記導電性粒子の1個分の厚みを有している、配線基板。 - 前記導電性粒子は、長径および短径を有しており、
前記配線は、前記第1角部および前記第2角部において、少なくとも前記導電性粒子の短径分の厚みを有している、請求項1に記載の配線基板。 - 前記導電性粒子は、第1の導電性粒子と第2の導電性粒子を含み、前記第1の導電性粒子の大きさが前記第2の導電性粒子の大きさよりも大きい、請求項1または2に記載の配線基板。
- 前記第1の導電性粒子の密度が前記第2の導電性粒子の密度よりも高い請求項3に記載の配線基板。
- 前記第2の導電性粒子の抵抗率が前記第1の導電性粒子の抵抗率よりも低い請求項3または4に記載の配線基板。
- 前記配線は、前記第1角部および前記第2角部において、前記導電性粒子の5個分以下の厚みを有している、請求項1または2に記載の配線基板。
- 前記配線は、前記導電性粒子の前記含有量が80重量%以上である、請求項1~6のいずれか1項に記載の配線基板。
- 前記傾斜面は、10μm以上200μm以下の幅を有している、請求項1~7のいずれか1項に記載の配線基板。
- 前記配線は、前記第1角部および前記第2角部において、0.4μm~1.6μmの厚みを有している、請求項1~8のいずれか1項に記載の配線基板。
- 前記配線は、前記主面および前記側面において、2μm~10μmの厚みを有している、請求項1~9のいずれか1項に記載の配線基板。
- 前記傾斜面は、前記主面に対する傾斜角度が30°以上60°以下である、請求項1~10のいずれか1項に記載の配線基板。
- 前記傾斜面は、曲面である、請求項1~11のいずれか1項に記載の配線基板。
- 前記主面の表面粗さを第1表面粗さRa1とし、前記傾斜面の表面粗さを第2表面粗さRa2とし、前記側面の表面粗さを第3表面粗さRa3としたとき、前記Ra1と前記Ra2と前記Ra3のうちの少なくとも2つが互いに異なっている、請求項1~11のいずれか1項に記載の配線基板。
- 前記Ra2が前記Ra1よりも大きい、請求項13に記載の配線基板。
- 前記Ra3が前記Ra2よりも大きい、請求項13または14に記載の配線基板。
- 前記基板の構成材料は、ガラスを含んでいる、請求項1~15のいずれか1項に記載の配線基板。
- 請求項1~16のいずれか1項に記載の配線基板を備え、
前記基板は、一方の前記主面の側に、複数の発光素子がマトリクス状に位置している表示装置。 - 前記基板は、他方の前記主面の側に、前記複数の発光素子に前記配線を介して電気的に接続された駆動部がある、請求項17に記載の表示装置。
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JPH04125477U (ja) * | 1991-05-02 | 1992-11-16 | ジエコー株式会社 | 配線構造及びそれを用いた表示装置 |
JP2003158353A (ja) * | 2001-11-26 | 2003-05-30 | Ngk Spark Plug Co Ltd | 配線基板 |
JP2003243804A (ja) * | 2002-02-14 | 2003-08-29 | Mitsuboshi Belting Ltd | 銅導体ペーストを用いた厚膜回路基板の製造方法 |
JP2005019576A (ja) * | 2003-06-25 | 2005-01-20 | Hitachi Metals Ltd | スルーホール導体を持った配線基板 |
JP2010161127A (ja) * | 2009-01-06 | 2010-07-22 | Ricoh Co Ltd | 配線基板及び配線基板の製造方法 |
JP2017134930A (ja) * | 2016-01-26 | 2017-08-03 | 株式会社ダイセル | 接合性導体ペースト |
US10531577B1 (en) * | 2019-01-31 | 2020-01-07 | At&S Austria Technologie & Systemtechnik Aktiengesellschaft | Forming through holes through exposed dielectric material of component carrier |
JP2020013735A (ja) * | 2018-07-19 | 2020-01-23 | 日立化成株式会社 | 導体形成用組成物、及び、導体層を有する物品の製造方法 |
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JPH04125477U (ja) * | 1991-05-02 | 1992-11-16 | ジエコー株式会社 | 配線構造及びそれを用いた表示装置 |
JP2003158353A (ja) * | 2001-11-26 | 2003-05-30 | Ngk Spark Plug Co Ltd | 配線基板 |
JP2003243804A (ja) * | 2002-02-14 | 2003-08-29 | Mitsuboshi Belting Ltd | 銅導体ペーストを用いた厚膜回路基板の製造方法 |
JP2005019576A (ja) * | 2003-06-25 | 2005-01-20 | Hitachi Metals Ltd | スルーホール導体を持った配線基板 |
JP2010161127A (ja) * | 2009-01-06 | 2010-07-22 | Ricoh Co Ltd | 配線基板及び配線基板の製造方法 |
JP2017134930A (ja) * | 2016-01-26 | 2017-08-03 | 株式会社ダイセル | 接合性導体ペースト |
JP2020013735A (ja) * | 2018-07-19 | 2020-01-23 | 日立化成株式会社 | 導体形成用組成物、及び、導体層を有する物品の製造方法 |
US10531577B1 (en) * | 2019-01-31 | 2020-01-07 | At&S Austria Technologie & Systemtechnik Aktiengesellschaft | Forming through holes through exposed dielectric material of component carrier |
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