WO2014203603A1 - 樹脂多層基板の製造方法 - Google Patents
樹脂多層基板の製造方法 Download PDFInfo
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- WO2014203603A1 WO2014203603A1 PCT/JP2014/060706 JP2014060706W WO2014203603A1 WO 2014203603 A1 WO2014203603 A1 WO 2014203603A1 JP 2014060706 W JP2014060706 W JP 2014060706W WO 2014203603 A1 WO2014203603 A1 WO 2014203603A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to 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
- H05K1/18—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]
- H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
-
- 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
- H05K3/0073—Masks not provided for in groups H05K3/02 - H05K3/46, e.g. for photomechanical production of patterned surfaces
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/306—Lead-in-hole components, e.g. affixing or retention before soldering, spacing means
-
- 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
-
- 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4697—Manufacturing multilayer circuits having cavities, e.g. for mounting components
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/81—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
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- 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]
- H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
- H05K1/186—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit manufactured by mounting on or connecting to patterned circuits before or during embedding
-
- 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
- H05K2201/01—Dielectrics
- H05K2201/0104—Properties and characteristics in general
- H05K2201/0129—Thermoplastic polymer, e.g. auto-adhesive layer; Shaping of thermoplastic polymer
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/06—Lamination
- H05K2203/061—Lamination of previously made multilayered subassemblies
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/06—Lamination
- H05K2203/063—Lamination of preperforated insulating layer
-
- 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
- H05K3/4626—Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials
- H05K3/4632—Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials laminating thermoplastic or uncured resin sheets comprising printed circuits without added adhesive materials between the sheets
Definitions
- the present invention relates to a method for producing a resin multilayer substrate with a built-in component.
- a through hole is formed so that the component is placed in the through hole.
- the method of laminating the above resin sheets and further overlaying the upper resin sheet so as to cover the components arranged in the through holes is common.
- a cavity is formed by making a through hole in a part of a plurality of resin sheets to be laminated, and components individually held by a known technique such as vacuum suction are inserted into the cavity.
- a method has also been proposed in which the upper resin sheet is stacked so as to cover the components contained in the cavity.
- the size of the cavity when viewed in plan is the same as the size of the part, the part will not enter the cavity even if the position of the part is slightly shifted. To avoid the cavity size is made larger than the part size. Accordingly, a gap is generated between the outer peripheral side surface of the component and the inner peripheral side surface of the cavity in a state where the component is disposed in the cavity.
- Patent Document 1 describes a method of manufacturing a multilayer board in which electronic components are embedded in a laminate of a plurality of resin films made of a thermoplastic resin.
- some resin films are provided with through holes for inserting electronic components.
- the through hole is formed larger than the outer shape of the electronic component in order to facilitate insertion of the electronic component. It is described that the gap between the outer peripheral side surface of the component and the inner wall of the through hole is filled by the flow of the resin during the heating and pressurizing steps for the laminate.
- Patent Document 2 Japanese Patent Application Laid-Open No. 2006-73763 (Patent Document 2) describes a configuration in which protrusions are provided on the inner wall of the through hole in order to suppress displacement of the chip component in the manufacturing stage. ing. When the chip component is placed in the cavity, the component is press-fitted while crushing the tips of these protrusions. Thus, the chip component is positioned in the cavity by being supported from the side by the protrusions.
- the gap between the outer peripheral side of the part and the inner peripheral side of the cavity needs to be large.
- this gap is large, the region that is filled by the flow of the resin at the time of thermocompression bonding is large, so that it is easily affected by the flow of the resin, and there is a problem of component displacement due to being pushed by the flow of the resin.
- the fact that the region filled by the flow of the resin is large causes a problem of the smoothness of the entire laminate, that is, the undulation of the laminate surface and the like. High smoothness means less surface undulation.
- a laminated body with low smoothness is difficult to mount mounting components on the surface.
- the gap between the outer peripheral side surface of the component and the inner peripheral side surface of the cavity be as small as possible.
- the gap must be secured to a certain extent, and the gap cannot be sufficiently reduced.
- an object of the present invention is to provide a manufacturing method that can further reduce the gap between the outer peripheral side surface of the component and the inner peripheral side surface of the cavity in the manufacturing method of the resin multilayer substrate incorporating the component.
- a method for producing a resin multilayer substrate according to the present invention is a method for producing a resin multilayer substrate in which components are incorporated in a laminate in which a plurality of thermoplastic resin sheets are laminated.
- the component is pressed against the first resin sheet while the first resin sheet, which should be adjacent to the first side in the thickness direction of the component among the plurality of resin sheets, is softened by heating.
- the component is inserted into the through-hole with respect to a third resin sheet that should be adjacent to the second side of the plurality of resin sheets opposite to the first side of the component.
- a step of overlapping such that the second side surface of the component faces the third resin sheet, the first resin sheet, the second resin sheet, and the third resin sheet.
- a step of pressure-bonding the laminated body by heating and pressing.
- the component is first fixed to the surface of the first resin sheet, and can be accurately positioned when fixed to the surface of the first resin sheet. Even if the component may collide with the second resin sheet in the vicinity, the phenomenon of the component jumping and flying can be avoided, so the gap between the outer peripheral side surface of the component and the inner peripheral side surface of the cavity It can be further reduced.
- FIG. 1 shows a flowchart of a method for manufacturing a resin multilayer substrate in the present embodiment.
- a method for producing a resin multilayer substrate in the present embodiment is a method for producing a resin multilayer substrate in which components are built in a laminate in which a plurality of thermoplastic resin sheets are laminated, and the plurality of resin sheets The first resin is pressed against the first resin sheet while the first resin sheet, which should be adjacent to the first side in the thickness direction of the component, is softened by heating.
- the third resin sheet that should be adjacent to the second side of the component opposite to the first side of the component is inserted into the through hole and the component
- the laminated body including the step S2 of overlapping so that the surface on the second side faces the third resin sheet, and the first resin sheet, the second resin sheet, and the third resin sheet And step S3 for pressure-bonding by heating and pressurizing.
- step S1 the first resin sheet 2a that is to be adjacent to the first side (for example, the upper side in FIG. 5) in the thickness direction of the component 3 among the plurality of resin sheets 2 is formed.
- the component 3 is fixed to the first resin sheet 2a by pressing the component 3 against the first resin sheet 2a while being softened by heating.
- the part 3 may be one piece or plural pieces. When there are a plurality of parts 3, they may all be the same size, or may be different sizes.
- FIG. 2 shows an example in which the component 3 includes one component 3a and one component 3b having different sizes. However, in this example, all the parts 3 have the same thickness. Here, only two parts 3 are shown, but this is for convenience of explanation, and the number of parts 3 may actually be three or more.
- Holding of the component 3 when performing the step S1 can be performed by a known technique such as vacuum suction. For example, it is only necessary to position and press the first resin sheet 2a while holding the component 3 by vacuum suction.
- the plurality of resin sheets 2 may be a sheet mainly composed of a thermoplastic resin, and the thermoplastic resin is, for example, LCP (liquid crystal polymer).
- the thermoplastic resin to be employed PEEK (polyether ether ketone), PEI (polyether imide), PPS (poniphenylene sulfide), thermoplastic PI (polyimide), and the like may be used in addition to LCP.
- the first resin sheet 2a which is one of the plurality of resin sheets 2, is a thermoplastic resin sheet, it can be softened by heating. By pressing the component 3 against the softened first resin sheet 2a, the component 3 adheres to the first resin sheet 2a and is in a fixed state as shown in FIG. At this time, the location where the component 3 of the first resin sheet 2a is fixed may be locally recessed.
- the first resin sheet 2a may have a conductor pattern formed on one side. However, at least a part of the portion to which the component 3 is pressed in the first resin sheet 2a is not covered with the conductor pattern.
- the component 3 is fixed by being pressed directly against the surface of the softened thermoplastic resin. Via conductors may be formed inside the first resin sheet 2a.
- step S2 as shown in FIG. 4, the first resin sheet 2a to which the component 3 is fixed is replaced with the second resin sheet 2b having a through hole 14 in which the component 3 among the plurality of resin sheets 2 is to be received. And it overlaps with respect to the 3rd resin sheet 2c which should be adjacent to the 2nd side opposite to the said 1st side of the components 3 among the some resin sheets 2.
- FIG. Step S2 is performed such that the component 3 is inserted into the through-hole 14 and the surface of the component 3 on the second side faces the third resin sheet 2c.
- the first side is the upper side in the finished product (see FIG. 5)
- the second side is the lower side in the finished product.
- FIG. 5 since the first side is the upper side in the finished product (see FIG. 5), the second side is the lower side in the finished product.
- the cavity 5 is configured by connecting a plurality of through holes 14 provided in the second resin sheet 2b.
- the through hole 14 for one layer becomes the cavity 5 as it is.
- the via conductor 6 is disposed in the third resin sheet 2 c in the portion that becomes the bottom surface of the cavity 5. These via conductors 6 are for electrical connection to the component 3. To be exact, these via conductors 6 are in an uncured state of a conductive paste containing Sn, Ag or the like as a component at this point, and become a metal solid by the subsequent heating and pressurizing steps in step S3. . When electrical connection is made between the component 3 and the via conductor 6, it is preferable that an intermetallic compound is formed in the vicinity of the interface where they are in contact with each other by the heating and pressurizing steps in step S ⁇ b> 3. . Thereby, the electrical connection between the component 3 and the via conductor 6 can be stabilized.
- the via conductor only the via conductor 6 in the third resin sheet 2c serving as the bottom surface of the cavity 5 is shown, but there are other places inside the laminate.
- a via conductor may be provided.
- a conductor pattern inside the laminate is not shown, but actually, a conductor pattern may be arranged on the upper surface or the lower surface of each resin sheet 2 as necessary. The same applies to other embodiments described below.
- the second side surface of the component 3 is electrically connected to the via conductor 6, and the second side surface of the component 3 is in contact with the third resin sheet 2 c.
- the electrical connection by the via conductor 6 from the second side to the component 3 is not essential. Therefore, depending on the way of electrical connection to the component 3, it is not essential that the second side surface of the component 3 is in contact with the third resin sheet 2c, and it may be just facing each other.
- the via conductor 6 is not necessarily arranged in the third resin sheet 2c.
- a plurality of second resin sheets 2b and third resin sheets 2c that have been preliminarily pressure-bonded are used.
- the resin sheet 2 on the lower side of the third resin sheet 2c is also temporarily crimped at the same time.
- the temporary pressure bonding is performed at a lower temperature than the main pressure bonding.
- the partial laminated body obtained by temporary pressure bonding is in a state in which the cavity 5 is opened on the upper surface.
- the first resin sheet 2a is overlaid on such a partial laminate from above.
- step S3 the laminated body including the first resin sheet 2a, the second resin sheet 2b, and the third resin sheet 2c is bonded by heating and pressurizing. In this way, a resin multilayer substrate 101 as shown in FIG. 5 can be obtained.
- the component 3 inserted into the cavity 5 is already fixed to the surface of the first resin sheet 2a before step S2.
- the component 3 can be accurately positioned when it is fixed to the surface of the first resin sheet 2a. Therefore, it is not necessary to provide a protrusion for positioning the component 3 on the inner wall of the cavity 5.
- the part 3 is a second resin in the vicinity of the cavity 5. Even if the sheet 2b collides with the sheet 2b, the component 3 is widely covered with the first resin sheet 2a, so that the component 3 is pushed into the cavity 5 by being pushed by the first resin sheet 2a. Since the component 3 is pushed into the cavity in a state of being confined below the first resin sheet 2a, the phenomenon that the component 3 bounces and flies, which has been a problem in the past, can be avoided. Therefore, even if the size of the cavity 5 is not significantly larger than the size of the component 3, it can be formed with a size close to the size of the component 3.
- the gap between the outer peripheral side surface of the component and the inner peripheral side surface of the cavity can be further reduced.
- the first resin sheet 2a is in a single state and the component 3 is fixed to the first resin sheet 2a.
- the first resin sheet 2a may be preliminarily pressure-bonded in advance by combining one or more other resin sheets. It is good also as fixing the component 3 with respect to what was temporarily crimped
- step S2 as shown in FIG. 7, the partial laminates temporarily bonded are combined. Thereafter, by performing step S3 for pressure bonding, a resin multilayer substrate 102 as shown in FIG. 8 can be obtained.
- the step S ⁇ b> 2 is performed using a plurality of second resin sheets 2 b and a single third resin sheet 2 c that are preliminarily pressure-bonded.
- the step S2 may be performed by stacking the resin sheets apart. In this way, it is not necessary to mount the component on the substrate having the cavity, so that it is not necessary to preliminarily press the partial laminated body. Therefore, since it can laminate
- the part 3 a and a part 3 b having different heights as the part 3.
- the step S1 is performed in the same manner as described in the first embodiment, and the component 3a and the component 3b are fixed to the upper surface of the same first resin sheet 2a.
- the part 3a is larger than the part 3b.
- step S2 is performed.
- the details of step S2 are the same as those described in the first embodiment, but cavities 5a and 5b having different depths are prepared in the lower partial stacked body.
- the cavity 5a for the component 3a is formed by connecting the through holes 14 for three layers.
- the cavity 5b for the component 3b is formed by connecting the through holes 14 for two layers. In this manner, the number of resin sheets provided with the through holes 14 may be appropriately adjusted so that cavities having depths corresponding to the heights of the components 3 are formed.
- step S3 is performed. In this way, a resin multilayer substrate 103 as shown in FIG. 12 can be obtained.
- the resin multilayer substrate 103 shown in FIG. 12 in the example shown in FIGS. 10 to 11, all of the plurality of components 3 to be incorporated are fixed to the first resin sheet 2a. You may make it show in FIG. That is, a part of the plurality of components 3 to be incorporated is fixed to the upper first resin sheet a, and the other part is fixed to the upper surface of the lower partial laminated body. S2 is performed.
- the component 3a is inserted from the lower side in the figure with respect to the series of through-holes 14 for three layers.
- the component 3b is inserted from above into a cavity 5b formed by a series of through-holes 14 for two layers.
- the upper surfaces of the parts 3a and 3b happen to be on the same plane, but the present invention can be applied to other cases. If there are a plurality of parts 3 and the positions of the upper and lower surfaces of the parts 3 are different, this can be dealt with by performing step S2 as shown in FIG.
- the parts 3a and 3b have different upper surface positions.
- a cavity 5a that opens downward and a cavity 5b that opens upward are provided in the laminate of the intermediate portion.
- the part 3a is inserted into the cavity 5a from the lower side in the figure, and the part 3b is inserted into the cavity 5b from the upper side in the figure.
- a resin multilayer substrate 104 as shown in FIG. 15 can be obtained.
- FIG. 16 shows a flowchart of the method for manufacturing the resin multilayer substrate in the present embodiment.
- the manufacturing method of the resin multilayer substrate in the present embodiment is basically the same as in Embodiment 1 or 2, but differs in the following points.
- the step S1 of fixing the component to the first resin sheet is performed by arranging the component on the adhesive surface of the adhesive sheet having an adhesive surface on the surface.
- step S1 the breakdown of step S1 is as follows.
- the adhesive sheet 31 includes a resin layer 31f and an adhesive layer 31n.
- the upper surface of the adhesive layer 31n corresponds to the adhesive surface 31u.
- the resin layer 31f is a film made of, for example, PET (polyethylene terephthalate).
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- polyester polypropylene sulfide
- PPS poniphenylene sulfide
- the pressure-sensitive adhesive layer 31n is, for example, an acrylic pressure-sensitive adhesive layer. Instead of acrylic, silicone may be used.
- the pressure-sensitive adhesive layer 31n may be a material having weak adhesiveness.
- step S12 as shown in FIG. 19, with the first resin sheet 2a softened by heating, the adhesive sheet 31 on which the component 3 is temporarily fixed is attached to the first resin sheet 2a.
- the parts 3 are stacked in a direction in contact with the first resin sheet 2a.
- FIG. 19 shows a state in which the first resin sheet 2a is stacked from above without moving the adhesive sheet 31 on which the component 3 is temporarily fixed on the upper surface, such a method may be used.
- the pressure-sensitive adhesive sheet 31 on which the component 3 is temporarily fixed may be turned upside down from the upper side with the first resin sheet 2a placed.
- the adhesive sheet 31 and the first resin sheet 2a are stacked and pasted, resulting in a state as shown in FIG.
- step S13 the first resin sheet 2a is softened by heating, and the adhesive sheet 31 is pressed against the first resin sheet 2a.
- the adhesive sheet 31 may also be heated together.
- the component 3 adheres to the softened first resin sheet 2a.
- the adhesive force to the component 3 by the softened first resin sheet 2a is stronger than the adhesive force to the component 3 by the adhesive surface 31u of the adhesive sheet 31.
- step S14 the pressure-sensitive adhesive sheet 31 is peeled off while leaving the component 3 on the surface of the first resin sheet 2a. In this way, the same one as shown in FIG. 3 is obtained. That is, the component 3 is fixed to the surface of the first resin sheet 2a.
- the adhesive force to the component 3 by the softened first resin sheet 2a is stronger than the adhesive force to the component 3 by the adhesive surface 31u of the adhesive sheet 31, even when the adhesive sheet 31 is peeled off, the component 3 can be left on the surface of the first resin sheet 2a.
- steps S2 and S3 are performed. Details of step S2 and step S3 are the same as those described in the first or second embodiment, and thus description thereof will not be repeated.
- the component when the component is fixed to the first resin sheet as step S1, the component is temporarily fixed to the adhesive sheet and then transferred to the first resin sheet. Since fixing the parts to the first resin sheet requires the resin to be softened at a high temperature, if the individual parts are handled directly and fixed to the first resin sheet, the resin softens. The part must be positioned and arranged in a high temperature state, or the first resin sheet must be heated after all parts are arranged. In the former case, parts placement work must be performed at a high temperature, which makes the work difficult. In the latter case, since the component is only placed on the surface of the first resin sheet before the first resin sheet is softened, the component may be displaced from the original position due to vibration, impact, or the like. There is.
- the pressure-sensitive adhesive sheet can temporarily fix the parts without increasing the temperature. Accordingly, it is easy to temporarily fix the component to the adhesive sheet. And after making the state which accumulated the adhesive sheet in which components were temporarily fixed on the 1st resin sheet, these can be heated and the resin of the 1st resin sheet can be softened. Since the component is temporarily fixed by the adhesive sheet, it is possible to prevent the component from shifting during heating.
- a pin hole may be provided at an appropriate position of the pressure-sensitive adhesive sheet, for example, near the outer periphery, and the pressure-sensitive adhesive sheet may be positioned with a mold pin. If the same reference pin hole is provided also in the first resin sheet, it is possible to work efficiently when stacking, and quick and accurate positioning can be performed.
- the manufacturing method of the resin multilayer substrate in the present embodiment is basically the same as that in the third embodiment, but differs in the following points.
- the protective sheet is formed so as to cover at least a part of the adhesive surface while avoiding the region where the components are arranged in the adhesive surface.
- the step S12 of including the step of placing the protective sheet is performed so as to sandwich the protective sheet between the pressure-sensitive adhesive sheet and the first resin sheet.
- a protective sheet 32 provided with an opening 35 in advance in an area corresponding to the component 3 is prepared, and as shown in FIG. 23, at least the adhesive surface 31u of the adhesive surface 31u is avoided by avoiding the region where the component 3 is disposed.
- the protective sheet 32 is attached to the adhesive surface 31u of the adhesive sheet 31 so as to cover a part.
- the protective sheet 32 is a sheet having no adhesiveness, or a sheet having lower adhesiveness than the adhesive sheet.
- a PET film can be used as the protective sheet 32.
- An opening 35 is provided in the protective sheet 32 in advance. The size of the opening 35 is slightly larger than the size of the component 3 as viewed in plan.
- step S11 the component 3 is temporarily fixed to the adhesive surface 31u as shown in FIG.
- the area where the adhesive surface 31 u is exposed through the opening 35 is slightly larger than the size of the component 3.
- step S12 the first resin sheet 2a is stacked as shown in FIG. At this time, the protective sheet 32 is sandwiched between the adhesive sheet 31 and the first resin sheet 1a.
- FIG. 27 Other methods are also conceivable for arranging the protective sheet 32 as shown in FIG.
- a protective sheet 32 is pasted so as to cover the entire adhesive surface 31u of the adhesive sheet 31, and then the blade 36 is protected along the outline of the region corresponding to the component 3. It is good also as making the cut 38 to the depth of the grade which cut
- the cut 38 is inserted so as to surround an area corresponding to the part 3.
- the unnecessary portion 37 of the protective sheet 32 is peeled off and removed. Even in this case, the structure shown in FIG. 24 can be obtained. Thereafter, the component 3 is temporarily fixed to the adhesive surface 31u in the same manner as shown in FIG.
- the protective sheet 32 is sandwiched between the adhesive sheet 31 and the first resin sheet 1a in a state where at least a part of the adhesive surface is covered with the protective sheet. Therefore, it is possible to avoid a situation in which the first resin sheet 2a and the pressure-sensitive adhesive sheet 31 are adhered to each other when the step of stacking the first resin sheet 2a is performed.
- the thickness of the protective sheet 32 is preferably 50% or more and 80% or less of the thickness of the component 3.
- the component 3 protrudes through the opening 35. If it becomes like this, by pressing the 1st resin sheet 2a and the adhesive sheet 31, the effect
- the thickness of the protective sheet 32 is preferably 50% or more and 80% or less of the thickness of the component 3.
- the step S1 for fixing the component 3 to the first resin sheet 2a is preferably performed at a lower temperature than the step S3 for pressure bonding.
- the component 3 can be temporarily bonded to the first resin sheet 2a in a simpler state than the main pressure bonding in step S3.
- undesired deformation of the first resin sheet 2a due to heat is suppressed.
- the “component” in the present invention refers to IC chips, passive components such as chip capacitors, chip inductors, chip resistors, substrates made of ferrite or low-temperature sintered ceramics, substrate members such as printed wiring boards, SUS plates, It is a concept including all functional members such as a metal plate such as a copper plate.
- Embodiment 5 As shown in FIG. 29, consider a case in which the component 3 is built in a plurality of different height positions inside one resin multilayer substrate 105.
- the resin multilayer substrate 105 shown in FIG. 29 incorporates components 3c and 3d at two height positions.
- Embodiment 5 Before starting the description of Embodiment 5 itself according to the present invention, in order to obtain such a resin multilayer substrate 105, a manufacturing method in the case of assembling sequentially from the lower layer will be described with reference to FIGS. explain.
- step S1 As shown in FIG. 30, the component 3c is placed on the upper surface of the first resin sheet 2a and is crimped. At this time, the first heating is performed.
- step S31 a laminate including the second resin sheet 2b and the third resin sheet 2c and having the cavity 5c is prepared separately, and this laminate is shown in FIG. The structure 30 is covered from above. By doing so, the structure shown in FIG. 32 is obtained.
- a second heating is performed as step S3.
- step S1 the necessary resin sheet 2 is stacked on the upper surface, and the component 3d is placed and crimped.
- This step corresponds to step S1.
- the third heating is performed.
- step S2 as shown in FIG. 34, a laminate having a cavity 5d is separately produced by overlapping desired resin sheets 2, and this laminate is covered from above. Thus, the structure shown in FIG. 29 is obtained.
- process S3 the whole is integrated by thermocompression bonding. At this time, the fourth heating is performed.
- the resin multilayer substrate 105 shown in FIG. 29 should be obtained through the fourth heating, but the resin multilayer substrate 105 has different heating times depending on the part. That is, the thermal history is different depending on the part. In particular, at the interface 40 shown in FIG. 35, since all the heating from the first time to the fourth time is experienced, the number of times of heating is the largest in the entire resin multilayer substrate 105. In the resin multilayer substrate 105 obtained in this way, the maximum value of the number of times of heating applied to the same part is 4. In general, in a resin multilayer substrate, a part that has undergone many times of heating may be easily peeled off due to a change in material properties or a residual stress. Therefore, it is preferable that the resin multilayer substrate does not include a portion that has been subjected to such many times of heating.
- the following method is preferable when it is desired to produce a resin multilayer substrate in which components are incorporated at different heights.
- the entire resin multi-layer substrate is divided and produced as a laminate of several parts.
- the laminated body of each part is divided so as to incorporate components.
- each laminated body is individually crimped in a state in which components are incorporated, and thereafter, these laminated bodies are combined and crimped. By doing so, one resin multilayer substrate can be obtained. If it does in this way, the maximum value of the frequency
- FIG. 30 to FIG. 32 and FIG. 36 to FIG. It demonstrates concretely with reference to.
- the steps S1 to S3 are performed to prepare a partial laminate as shown in FIG. 32 in the same manner as before.
- the laminated body thus obtained is referred to as a “lower laminated body”.
- the number of times of heating is two.
- step S1 The heating performed at the time of this crimping is the first heating for the structure shown in FIG.
- a plurality of resin sheets 2 are combined to separately produce a laminate having a cavity 5e, and in step S2, the laminate is viewed from above with respect to the structure shown in FIG. Cover.
- step S3 the structure shown in FIG. 38 is obtained.
- a second heating is performed as step S3.
- the laminated body thus obtained will be referred to as an “upper laminated body”.
- the upper laminate is overlaid on the upper side of the lower laminate.
- the upper laminated body is turned upside down compared to the posture shown in FIG. Heating is performed to integrate the lower laminate and the upper laminate by thermocompression bonding. This heating is the third heating for both the lower laminate and the upper laminate.
- the resin multilayer substrate 105 shown in FIG. 29 is obtained.
- the maximum value of the number of times of heating applied to the same part is 3. Compared to the maximum value of 4 in the example described above, the maximum value of the number of heating times applied to the same part can be reduced by one.
- FIG. 40 A structure in which the component 3c is pressure-bonded to one surface of the resin sheet 2 and a structure in which the component 3d is pressure-bonded to one surface of the resin sheet 2, as shown in FIG. Separately from these, as shown in FIG. 40, a laminate in which resin sheets are appropriately combined is prepared.
- the structure shown in FIG. 40 is referred to as an “intermediate laminate”.
- the intermediate laminate has a cavity 5c on the lower surface and a cavity 5e on the upper surface.
- the intermediate laminate includes a via conductor 6 inside.
- Each of the structure shown in FIG. 30, the structure shown in FIG. 36, and the intermediate laminate shown in FIG. 40 has experienced only one heating.
- the intermediate laminate shown in FIG. 40 is covered on the structure shown in FIG. 30, and the structure shown in FIG. .
- the whole is integrated by thermocompression bonding.
- the heating performed at this time is the second heating for any of the three parts shown in FIG.
- the resin multilayer substrate 105 shown in FIG. 29 is obtained.
- the maximum value of the number of times of heating applied to the same part is 2. Compared to the maximum value of 4 or 3 in the fifth embodiment, the maximum value of the number of heating times applied to the same part can be further reduced in the present embodiment.
- the maximum value of the number of times of heating can be appropriately reduced, so that peeling in the resin multilayer substrate can be suppressed.
- the surface on the first side is preferably roughened.
- the “surface on the first side” is the surface on the side in contact with the first resin sheet 2a as described in the first embodiment. 42 and 43, the surface unevenness of the surface of the component 3 is exaggerated to show that the surface on the side in contact with the first resin sheet 2a is a rough surface.
- the roughened surface of the component 3 can provide an anchor effect to the softened resin surface of the first resin sheet 2a, and can be more firmly fixed. Therefore, as shown in FIG. 43, the component 3 can be more reliably fixed to the first resin sheet 2a.
- the “roughening process” means a process for increasing the surface roughness and can be appropriately performed by a known technique.
- ⁇ Parts built into the resin multilayer substrate are not limited to ICs (Integrated Circuits) having external electrodes on the bottom surface.
- ICs Integrated Circuits
- a component built in the resin multilayer substrate for example, a ceramic chip component having an external electrode on the side surface can be used.
- the components are generally fixed with a surface. That is, so-called surface mounting is performed. Actually, in the example shown in FIGS. 2 to 3, fixing to the resin sheet 2 is performed via the lower surface of the component 3.
- the flatness deteriorates due to the presence of the external electrode 7.
- the thickness of the plating layer 8 further contributes to the deterioration of the flatness.
- the component used in the method for producing a resin multilayer substrate according to the present invention is preferably a component having a high flatness on the upper surface / lower surface. Therefore, for example, as shown in FIG. 45, it is preferable to use a component 3 on which the external electrode 7 is not plated.
- the present invention can be used in a method for manufacturing a resin multilayer substrate incorporating a component.
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Abstract
Description
図1~図5を参照して、本発明に基づく実施の形態1における樹脂多層基板の製造方法について説明する。本実施の形態における樹脂多層基板の製造方法のフローチャートを図1に示す。
実施の形態1では、複数ある部品3がいずれも高さの等しいものであることを前提に説明してきたが、高さが異なる部品が混在している場合においても、本発明は適用可能である。高さが異なる部品が混在している場合の樹脂多層基板の製造方法について、実施の形態2で説明する。
図16~図20を参照して、本発明に基づく実施の形態3における樹脂多層基板の製造方法について説明する。本実施の形態における樹脂多層基板の製造方法のフローチャートを図16に示す。
次に、工程S12として、図19に示すように、第1の樹脂シート2aを加熱により軟化させた状態で、部品3が仮固定された粘着シート31を、第1の樹脂シート2aに対して、部品3が第1の樹脂シート2aに接する向きで、重ねる。図19では、部品3が上面に仮固定された粘着シート31は動かさずに、第1の樹脂シート2aを上から重ねる様子を示しているが、このような方法であってもよい。逆に、第1の樹脂シート2aを置いた状態で、部品3が仮固定された粘着シート31を上側から裏返しに重ねてもよい。
図21に示すように、部品3間の距離が長い箇所がある場合には、粘着シート31から第1の樹脂シート2aに部品3を転写しようとした際に、図22に示すように第1の樹脂シート2aがたわんで粘着シート31に接触してしまう場合がある。このように第1の樹脂シート2aの一部が粘着シート31に接触した場合、第1の樹脂シート2aと粘着シート31とがくっついてしまい、ハンドリングが困難となる。また、粘着シート31上での部品3の配置が正確に行なわれていても、部品3を粘着シート31から第1の樹脂シート2aに転写する際に、第1の樹脂シート2aがたわんでいると、第1の樹脂シート2aの表面の不正確な位置に転写されてしまうおそれがある。本発明に基づく実施の形態4では、このような問題を克服するための対処法を示す。
本実施の形態における樹脂多層基板の製造方法では、保護シートを用いて粘着面の少なくとも一部を覆った状態で、粘着シート31と第1の樹脂シート1aとで保護シート32を挟み込むようにしているので、第1樹脂シート2aを重ねる工程を行なう際に第1の樹脂シート2aと粘着シート31とがくっついてしまう事態を避けることができる。
図29に示すように、1つの樹脂多層基板105の内部の異なる複数通りの高さの位置に部品3を内蔵させる場合を考える。図29に示した樹脂多層基板105は、2通りの高さの位置に部品3c,3dを内蔵している。
実施の形態5で説明した製造方法のさらなる変形例について、本発明に基づく実施の形態6として説明する。実施の形態5では下部積層体と上部積層体という大きく2つの積層体に分けて作製してから両者を組み合わせて圧着する例を示したが、実施の形態6では、図30に示すように、樹脂シート2の一方の面に部品3cが圧着している構造体と、図36に示すように、樹脂シート2の一方の面に部品3dが圧着している構造体とをそれぞれ作製しておき、これらとは別に、図40に示すように樹脂シートを適宜組み合わせて積層したものを作製しておく。図40に示す構造体を、「中間積層体」と呼ぶこととする。図40に示した例では、中間積層体は、下面にキャビティ5cを有し、上面にキャビティ5eを有する。中間積層体は、内部にビア導体6を含んでいる。図30に示した構造体も、図36に示した構造体も、図40に示した中間積層体も、それぞれ経験している加熱の回数はまだ1回である。次に、図41に示すように、図30に示した構造体の上に、図40に示した中間積層体を被せ、さらにその上に、図36に示した構造体を上下反転させて被せる。こうして、工程S3として全体を熱圧着により一体化させる。このとき行なわれる加熱は、図41に示した3つの部分のいずれにとっても第2回の加熱となる。こうして、図29に示した樹脂多層基板105が得られる。樹脂多層基板105の中で、同一部位にかかる加熱回数の最大値は2となる。実施の形態5では最大値が4または3であったのに比べると、本実施の形態では、同一部位にかかる加熱回数の最大値をさらに減らすことができている。
Claims (6)
- 熱可塑性の複数の樹脂シートを積層した積層体の内部に部品を内蔵したものである樹脂多層基板の製造方法であって、
前記複数の樹脂シートのうち前記部品の厚み方向の第1の側に隣接すべきものである第1の樹脂シートを加熱により軟化させた状態で前記部品を前記第1の樹脂シートに押し当てることによって前記第1の樹脂シートに前記部品を固定する工程と、
前記部品を固定した前記第1の樹脂シートを、前記複数の樹脂シートのうち前記部品を受け入れるべき貫通孔を有する第2の樹脂シート、および、前記複数の樹脂シートのうち前記部品の前記第1の側とは逆の第2の側に隣接すべきものである第3の樹脂シートに対して、前記部品が前記貫通孔に挿入されかつ前記部品の前記第2の側の面が前記第3の樹脂シートに対向するように、重ねる工程と、
前記第1の樹脂シート、前記第2の樹脂シートおよび前記第3の樹脂シートを含む前記積層体を加熱および加圧することによって圧着させる工程とを含む、樹脂多層基板の製造方法。 - 前記第1の樹脂シートに前記部品を固定する工程は、
表面に粘着面を有する粘着シートの前記粘着面に前記部品を配置することによって前記部品を仮固定する工程と、
前記部品が仮固定された前記粘着シートを、前記第1の樹脂シートに対して、前記部品が前記第1の樹脂シートに接する向きで、重ねる工程と、
前記第1の樹脂シートを加熱により軟化させ、前記粘着シートを前記第1の樹脂シートに対して押し当てる工程と、
前記部品を前記第1の樹脂シートの表面に残したまま前記粘着シートを引き剥がす工程とを含む、請求項1に記載の樹脂多層基板の製造方法。 - 前記重ねる工程の前に、
前記粘着面のうち前記部品が配置される領域を避けて前記粘着面の少なくとも一部を覆うように、保護シートを配置する工程を含み、
前記重ねる工程は、前記保護シートを前記粘着シートと前記第1の樹脂シートとで挟み込むようにして行なわれる、請求項2に記載の樹脂多層基板の製造方法。 - 前記保護シートの厚みは、前記部品の厚みの50%以上80%以下である、請求項3に記載の樹脂多層基板の製造方法。
- 前記第1の樹脂シートに前記部品を固定する工程は、前記圧着する工程より低い温度で行なう、請求項1から4のいずれかに記載の樹脂多層基板の製造方法。
- 前記第1の樹脂シートに前記部品を固定する工程を開始する時点で、前記部品の前記第1の側の表面は粗化処理済である、請求項1から5のいずれかに記載の樹脂多層基板の製造方法。
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Also Published As
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JPWO2014203603A1 (ja) | 2017-02-23 |
CN105165129A (zh) | 2015-12-16 |
CN105165129B (zh) | 2019-03-08 |
US20160044798A1 (en) | 2016-02-11 |
JPWO2014203718A1 (ja) | 2017-02-23 |
US10098238B2 (en) | 2018-10-09 |
JP6103054B2 (ja) | 2017-03-29 |
US9961780B2 (en) | 2018-05-01 |
WO2014203718A1 (ja) | 2014-12-24 |
US20160050766A1 (en) | 2016-02-18 |
JP6103055B2 (ja) | 2017-03-29 |
CN105103665A (zh) | 2015-11-25 |
CN105103665B (zh) | 2018-03-09 |
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