Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a multilayer board, wherein misregistration of a conductor pattern on a surface and formation of an air gap caused by water vapor are suppressed. SOLUTION: The method of manufacturing a multilayer board includes: a lamination step of laminating a plurality of resin films in a thickness direction of the resin films to form a laminate, wherein the resin films comprise a thermoplastic resin and contain a resin film of which a conductor layer is formed on a surface; and a hot press step of bonding and fixing the plurality of the resin films together to form a resin base material by pressing the laminate while heating after the lamination step. The resin films use a thermoplastic resin having a converted value of water vapor permeability of 2.6 g/(m 2 ×day) or above at 40°C, 90%RH, and 100 μm in resin film thickness. In the lamination step, a resin film, on the entire surface of which conductor foil as a conductor layer is formed, is laminated so that the conductor foil forms a surface of the laminate. The method includes an etching step of forming a conductor pattern as the conductor layer by patterning the conductor foil after the hot press step. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resin film which can simultaneously achieve heat resistance and mechanical strength and the adhesion on laminating and can easily and inexpensively manufacture a multilayer substrate, a multilayer substrate using the same, and to provide a method for manufacturing the multilayer substrate. SOLUTION: The resin film is for use in a multilayer substrate which is manufactured by laminating the films with each other by heating under pressure and the resin film is composed of a polyaryl ketone resin and a polyetherimide resin which forms a complete compatibility system with the polyaryl ketone resin, and the content of the polyaryl ketone resin content is more than 10 wt.% and less than 35 wt.% and the content of the polyetherimide resin is more than 65 wt.% and less than 90 wt.%. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer circuit board and method of manufacturing the same, wherein a heat-resistant strength is enhanced, a peeling malfunction of a conductor pattern is suppressed, and reliability is high at a low cost. SOLUTION: In the multilayer circuit board, a plurality of resin films 10a to 10d made of a thermoplastic resin 1 on a surface of which a conductor pattern 2 is formed are attached to each other, so that the conductor pattern 2 is formed in a multilayered state, and the conductor patterns 2 in a different layer are connected to each other between layers by a connection conductor 3 made of a sintered body of a conductive paste. The multilayer circuit board is a multilayer circuit board 100 in which a glass fiber woven material 4 is embedded in the thermoplastic resin 1 of the resin films 10a to 10d constituting an interlayer of the conductor patterns 2. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a multilayer substrate which can elongate the number of times of using a buffer member and can improve an operating rate. SOLUTION: The method of manufacturing the multilayer substrate 100 includes a laminating step of laminating a resin film 11 made of a thermoplastic resin and a conductor pattern 12 to form a laminate 20; and a heating and pressurizing step of heating and pressurizing the laminate 20 by a hot press plate 50 from both upper and lower surfaces, in the state that the buffer member 50 arranged between the laminate 20 and the hot press plate 50 for reducing the pressure difference to be applied to the respective parts of the laminate 20 from the hot press plate 50 is interposed between the front surface of the laminate 20 and the hot press plate 50. The individual buffer members 60 are prepared according to the disposition of the conductor pattern 12 to the resin film 11. In the heating and pressurizing step, in the state that the laminate 20 and the buffer member 60 corresponding to the conductor pattern 12 of the laminate 20 are positioned, the laminate 20 is heated and pressurized by the hot press plate 50. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer substrate which can prevent the occurrence of cracks, and also to provide a method of manufacturing the same. SOLUTION: The multilayer substrate 1 has a single-sided conductor pattern film 20 located in a surface layer. The single-sided conductor pattern film 20 has such a structure that a conductor pattern including a land 3 is formed on one face of a resin film 2 formed of thermoplastic resin, and a via hole 5 with the land 3 as a bottom face is filled with an interlayer connection material 4. In a part of the front surface or rear surface of the land 3, a concave portion 7 is formed. In the multilayer substrate 1, when the resin film 2 shrinks, the land 3 can also be deformed in compliance with the shrinkage of the resin film 2, resulting in preventing the occurrence of cracks 6 in the resin film 2 in contact with the land 3. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer substrate with superior recyclability and its manufacturing method. SOLUTION: A resin film 2 is mutually bonded by laminating a plurality of one-surface conductor pattern films 1 and heating and pressing them at the same time to form a multilayer substrate 8. At this time, a releasing sheet 6 which is hard to stick on the resin film 2 and a heat radiation member 7 is previously provided between the one-surface conductor pattern films 1 and the heat radiation member 7 as a removal part of the multilayer substrate 8 in a bonding process. Consequently, the resin film 2 and the heat radiation member 7 can easily be separated from the surface of the releasing sheet 6 at the removal part, so the resin film 2 and the heat radiation member 7 can easily be recycled. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To simultaneously perform a plurality of works having different heating temperature profiles in a hot press working with a common hot press. SOLUTION: Heating boards 1a, 1b, 1c of ≥3 pieces are disposed in the laminated layer direction by arranging gaps, and a laminated body 90a of a conductor pattern is inserted into the gap of the upper step among the heating boards 1a, 1b, 1c and a laminated body 90b is inserted into the gap of the lower step. At this time, heat-insulating members 5 are disposed into only both sides of the laminated body 90b. In this way, since the heat calory conducted to the laminated body 90b from the heating boards 1b, 1c is reduced in comparison with the heat calory conducted to the laminated body 90a, the heating temperature profile between the laminated body 90a and the laminated body 90b can be differed. Therefore, even in the case of constituting the laminated bodies 90a, 90b with the different thermoplastic resin materials, since the heating temperature profile suitable to the respective materials can be realized, the hot press can simultaneously be performed with the common hot press. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To restrain resin films as insulating layers composing a multilayer wiring board from being curved or corrugated and to prevent a wiring pattern from varying in impedance. SOLUTION: The wiring pattern 22a and a dummy pattern 22b not used as wiring are formed on the resin film 23. A plurality of conductor pattern films 21 which are each provided with the wiring patterns 22a and the dummy pattern 22b are laminated into the multilayer wiring board 100. By this setup, a part where no wiring pattern is present can be compensated by the dummy pattern 22b, so that the resin film 23 can be restrained from being deformed such as curved or corrugated. Therefore, the wiring pattern 22a arranged between the resin films 23 can be restrained from varying in impedance. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a conductive compound which enables high joining strength at a joining interface and enables high electric reliability at the joining interface even under severe environmental conditions such as temperature changes or vibrations. SOLUTION: The conductive compound comprises metal powder which consists of silver particles whose diameters are 0.5 to 60 μm and tin particles whose diameters are 0.5 to 60 μm, and dispersion medium wherein the tin particles have ball shapes. The metal powder of 85 to 93 wt.% is contained in the electrically conductive compound, the silver particles and the tin particles are mixed in the wt. radio of 75 to 50:25 to 50, and single or mixed solvent having boiling temperature of 200°C or more is chosen from polyhydric alcohol, hydrocarbon or alcohol ester as the dispersion medium. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To simultaneously adhere a plurality of resin films by heating and pressurizing steps without bringing about a positional deviation of the conductor pattern formed on the resin film. SOLUTION: The method for manufacturing the multilayer board comprises the step of forming a plurality of through holes 27, 35 formed in a multilayer board forming film 21 at superposing positions along a laminating direction of the board. The method further comprises the step of filling a conductive paste 50 sintered at a lower temperature than a heating temperature of the heating and pressurizing step to be conducted to weld the multilayer board forming films 21 in the holes 27, 35. Thus, when the heating and pressurizing steps are conducted, the paste 50 is sintered to form columnar supports 60, 70, and a hot pressing plates 80a, 80b are supported, the thermoplastic resin of the region used as the board can be prevented from being applied by an excess pressure, and a conductor pattern 22 formed on the film 21 can be prevented from being deviated. COPYRIGHT: (C)2003,JPO