JP2007313803A - Manufacturing method for multi-layer laminated plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved and new manufacturing method for a multi-layer laminated plate which is excellent in molding displacement (slipping) resistance during the formation of the multi-layer laminated plate, and in addition, and also in the suppressing effect for the dispersion in the dimensional variation and the warpage. <P>SOLUTION: The multi-layer laminated plate is manufactured by heat-press-laminate-molding a body 3 to be press-laminated for which a prepreg 32, a metal foil 33 or an external layer material are stacked on an internal layer plate 31. In this case, a plurality of sets of bodies 3 to be press-laminated are mounted, and the lower side of the mounted article 30 is enclosed by a frame. Then, an upper frame having a plurality of tongue leg pieces is placed around the mounted article from the upper side, and the heat-press-laminate-molding is performed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a multilayer laminate by heat and pressure lamination.

  As the demand for high-density mounting of printed wiring boards increases, expectations for multilayer printed wiring boards are great. A multilayer printed wiring board usually has a configuration in which an insulating plate and an outer layer circuit are arranged above and below an inner layer plate having an inner layer circuit, and an outer layer circuit is formed on a multilayer laminated board corresponding to this configuration. It is manufactured by making a circuit and an outer layer circuit conductive. For this reason, the multilayer laminated board for multilayer circuit formation greatly affects the performance of the multilayer printed wiring board.

  With regard to such a multilayer laminated plate, conventionally, a plurality of sets of pressed laminates in which a prepreg and a metal foil or an outer layer material are stacked on an inner layer plate are placed via metal plates, and heated by pressing from above and below. That is why it is laminated.

  However, in this lamination molding, there is a concern about occurrence of lateral displacement (slipping) at the time of molding. Conventionally, as a measure for preventing such molding deviation, for example, a perspective view and a plane in FIG. Then, as shown in the side view, the upper frame 1 having a plurality of tongue-and-feet pieces 11 around the periphery is placed on the placement product 30 of the plurality of pressed laminates 3 placed on the substrate 2 and heated. 9 or a method of heating and pressurizing using the improved upper frame 1 provided with a movable tongue-and-foot piece 12 as shown in FIG. 9 so that the height can be adjusted (for example, Patent Documents 1-3) Have been adopted.

  However, the upper frame (type 1) having the tongue-and-foot piece 11 as shown in FIG. 8 and the upper frame (type 2) provided in the movable tongue-and-foot piece 12 as shown in FIG. There were advantages and disadvantages as shown. That is, in the case of Type 1, the tongue-and-feet piece 11 is in a state of floating from the substrate 2, and the plurality of mounted laminates 3 to be pressed are not fixed as a whole. For this reason, depending on the configuration of the pressed laminate 3, slipping may occur. On the other hand, in the case of the improved type 2, the movable tongue-and-feet piece 12 is in contact with the substrate 2 and the plurality of mounted laminates 3 are fixed as a whole, thus preventing slipping. Has a great effect. However, since the type 2 is fixed, distortion due to pressure applied at the time of molding cannot be completely removed, and there is a problem that variation in dimensions and warpage of each pressed laminate are likely to occur.

  On the other hand, in the case of Type 1, since it is not fixed on the contrary, the stress is released, and the variation in dimension and warpage are good.

  Further, Type 2 has a problem that the cost is inevitably increased in that an upper frame having a movable tongue-and-foot piece is used.

JP-A-6-8389 JP-A-6-334342 JP 2005-14384 A

  The present invention eliminates the conventional problems from the background as described above, is excellent in forming deviation (slipping) property at the time of forming a multilayer laminate, and also has a good effect of suppressing dimensional variation and warpage. It is an object of the present invention to provide a new method for manufacturing a board.

  The manufacturing method of the present invention is characterized by the following.

  First: When producing a multi-layer laminate by heating and press-molding a laminated laminate in which a prepreg and a metal foil or an outer layer material are laminated on an inner layer plate, a plurality of sets of laminated laminates are placed on the lower side. Is covered with a frame, and an upper frame having a plurality of tongues and legs is placed on the periphery from above, and heat-press lamination molding is performed.

  Second: Inner dimension of the frame surrounding the lower side: Outer dimension between b and tongue and leg pieces of the upper frame: a, so that ba is in the range of 4 to 8 mm.

  Third: A notch groove is provided on the frame surrounding the lower side, and a protrusion is provided on the tongue foot piece of the upper frame, and this protrusion is inserted into the notch groove during molding.

  According to the first aspect of the present invention, the conventional problems are solved, the prevention of molding deviation (slipping) at the time of molding the multilayer laminate sheet is excellent, and the dimensional variation and warpage suppression effect are also good. A multilayer laminate can be manufactured.

  In the invention by specifying the second dimensional difference (b−a), it is possible to more surely suppress the molding deviation.

  Further, in the third invention, prevention of molding deviation is more effective, and it is possible to provide a frame or upper frame means as a cheaper jig.

  The present invention has the features as described above, and an embodiment thereof will be described below.

  FIG. 1 of the accompanying drawings is a schematic cross-sectional view illustrating the mounting state of a pressure-bonded laminate 3 targeted by the method of the present invention. In the present invention, for example, as illustrated in FIG. A plurality of sets of pressed laminates 3 in which a prepreg 32 and a metal foil 33 or an outer layer material are stacked on 31 are placed on the substrate 2 via the metal plate 4 and with the upper and lower cushion members 5, and the vertical direction thereof. The required laminates are manufactured by forming into a laminate by resin reinforcement by pressurization and heating.

  It is the outline side view showing one embodiment of the above-mentioned 1st invention in the case of this manufacture. As shown in FIG. 2, the lower side of the mounted product 30 of the pressure-sensitive laminate 3 is surrounded by the frame 6, and the upper frame 7 having a plurality of tongue-and-foot pieces 71 around the upper side is covered from the upper side and heat-press molding is performed. . By doing so, it is possible to realize a laminate product that suppresses the deviation (slipping) in molding, suppresses warpage, and is excellent in dimensional stability. The tongue leg piece 71 does not need to be movable like the conventional type 2, and the cost as a jig is low.

  FIG. 3 is a schematic view illustrating an embodiment of the second invention. In order to minimize the molding deviation, the inner dimension: b of the frame 6 that surrounds the lower side of the placed article 30 and the outer dimension: a between the opposing tongue and foot pieces 71 of the upper frame 7, the dimension difference b -A is set within a range of 4 to 8 mm.

  FIG. 4 is a schematic side view and a plan view illustrating one embodiment of the third invention. Here, a cutout groove 61 is provided in the schematic frame 6 on the lower side of the placed product 30, and at the time of molding, the cutout 61 is provided in the tongue foot piece 71 of the upper frame 7 facing outward. The protrusion 72 is inserted exactly.

  This effectively suppresses the occurrence of molding deviation.

  Of course, in the manufacturing method of the present invention as described above, the configuration of the target pressure-bonded laminated plate 3, the size and thickness of the plane, the height and size of these mounted items 30, and the conditions of heating and pressing In consideration of the above, materials such as the lower frame 6, the upper frame 7, the tongue and foot piece 71, the protrusion 72, and the like may be appropriately determined, and may be made of metal or the like. The arrangement positions and dimensions of the tongue leg piece 71, the protrusion 72, and the cutout groove 61 of the lower frame 6 are also the same. Appropriate for suppression of molding deviation, warpage, and variation in dimensional change.

  Therefore, an example will be shown below and will be described in more detail. Of course, the description is not limited by the following examples.

  Corresponding to the structure of the pressed laminate of FIG. 1, the size is 510 × 510 mm, the inner layer material (R-1766, manufactured by Matsushita Electric Works, 0.9t), and two prepregs (R −1661, 0.15: Resin amount 48%), and copper foil (18 μm) as upper and lower outermost layers was laminated and formed.

As manufacturing conditions, the above-mentioned 12 laminated bodies (stages) were placed together with a metal (SUS) plate and a cushion material as shown in FIG. 1 and heated and pressurized under the following molding conditions.
(Temperature conditions)
Heating up to 160 ° C at a product rising temperature of 2.0 ° C / min. Hold for 60 minutes at 160 or more.
(Pressure condition)
Pressure until the completion of the heating by the booster 40 kg / cm ² at 5 kg / cm ² at 10 minutes after pressing 10 minutes 40 kg / cm ^2.

  At that time, the upper and lower frames were used as in the forms shown in FIGS. 2 and 3, and the dimensional difference ba was set to 2 mm (Example 1), 10 mm (Example 2), and 8 mm (Example 3). In this case, as shown in FIG. 4, when the upper and lower frames having notches 61 and protrusions 72 are used and the dimensional difference ba is 8 mm, the conventional type 1 (FIG. 8: Comparative Example 1) is used. The degree of occurrence of molding deviation, dimensional variation, and warpage was evaluated for each of the types 2 (FIG. 9: Comparative Example 2).

  For the upper and lower frames, etc., the material is iron, the top frame top plate is 3 mm thick, the tongue pieces are arranged in two on one side, the size is 35 mm high, 20 mm wide, and thickness 1. The thickness of the lower frame was 3 mm, the height was 45 mm, and the protrusions on the tongue and foot pieces were cylindrical with a diameter of 5 mm and a length of 7 mm.

  As for the molding deviation, as shown in FIG. 5, the maximum deviation value (mm) between the SUS plate and the end face of the laminated body was measured for each laminated board.

  Regarding the dimensional variation, as shown in FIG. 6, the dimension between the reference marks of the inner layer pattern was measured, and the variation was calculated.

  As for the warpage, as shown in FIG. 7, the molded laminated plate was allowed to stand on a surface plate, and the warpage amount of the corner portion was measured with a warpage gauge.

  These results are shown in Table 2.

From the results of Table 2, it can be seen that in the embodiment of the present invention, the occurrence of molding deviation can be greatly suppressed as compared with the case of the conventional type 1, and the dimensional variation and warpage can be greatly suppressed as compared with the type 2. In Examples 3 and 4, the effect is remarkable.

  In addition, compared with the cost of the frame jig in the case of Type 1, it was about twice in the case of Type 2, but 1.1 times in Examples 1 to 3 and about 1.3 times in Example 4. However, it was low cost.

It is an outline sectional view which illustrated the example of composition of the pressed laminated board made into the object, and the mounting state. 1 is a schematic side view illustrating an embodiment of the first invention. It is the outline | summary side view and top view which illustrated embodiment of 2nd invention. It is the outline | summary side view and top view which illustrated embodiment of 3rd invention. It is the general | schematic perspective view shown about the maximum value of shaping | molding deviation | shift. It is the outline top view shown about the measurement of dimensional variation. It is the general | schematic sectional drawing shown about the measurement of curvature. It is the perspective view, the plane, and schematic diagram which were shown about the conventional type 1. FIG. It is the perspective view, the plane, and schematic diagram which were shown about the conventional type 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper frame 11 Tongue foot piece 12 Movable tongue foot piece 2 Board | substrate 3 Pressurized laminated board 30 Mounted goods 31 Inner layer material 22 Prepreg 23 Metal foil 4 Metal plate 5 Cushion material 6 Frame 61 Notch groove 7 Upper frame 71 Tongue foot 72 protrusions

Claims (3)

  When manufacturing a multi-layer laminate by heat-press laminate forming a pressure-ply laminate with prepreg and metal foil or outer layer material on the inner layer plate, multiple sets of pressure-sensitive laminates are placed and the lower side is the frame A method for producing a multilayer laminate, comprising: heating and pressurizing and laminating an upper frame having a plurality of tongue-and-feet pieces on the periphery from above.   2. The inner dimension of the frame surrounding the lower side: b and the outer dimension between the tongues of the upper frame: a, so that ba is in the range of 4 to 8 mm. A method for producing a multilayer laminate.   A multilayer laminate comprising a cutout groove in a frame surrounding the lower side, and a protrusion on a tongue foot piece of the upper frame, and the protrusion is inserted into the cutout groove during molding. Production method.