Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer circuit board having a low dielectric constant, and suitable for a high frequency circuit. SOLUTION: The multilayer circuit boards 100, 101 laminate a plurality of thermoplastic resin films formed conductor patterns 20, 30, in which a high frequency conductor pattern 30 formed a high frequency circuit is contained, made of metal foil. In an insulating base material 10 formed by sticking the resin films mutually, the multilayer circuit boards 100, 101 are constituted by forming holes 40, 41 around the high frequency conductor pattern 30. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a printed wiring board which improves adhesive properties of plating to an inner wall of a through hole and durable reliability. SOLUTION: In the printed wiring board in which a resin film and a conductor pattern 22 are alternatively laminated, a hole 25 is formed in the resin film at a position on an outer periphery of a through hole forming region, a conductive member 51 is provided in the hole 25 so that the member 51 is formed as a part of the inner wall of a through hole 41. The member 51 couples a conductor pattern 22a surrounding the hole 41. Accordingly, a through hole plating 43 plated in the hole 41 connects the pattern 22a and the member 51 and thereby a structure in which the plating 43 is reinforced is provided. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a logomark-bearing board, and the same logomark-bearing board, wherein its irregularities pressing is made possible, without altering its pressing die. SOLUTION: The manufacturing method of a logomark-bearing board comprises a process for so forming a logo pattern 4 corresponding to a logomark 9 on a resin film 2 softened and deformed, when heating/pressing the resin film 2 as to use the material of the logo pattern 4, whose deformed quantity is less than the resin film 2, when heating/pressing the material of the logo pattern 4, a process for laminating a plurality of resin films, inclusive of the resin film 2 having the logo pattern 4, and a heating/pressing process for so heating/pressing the laminated resin films by using a pressing mold 8 as to bond them to each other. In the heating/pressing process, buffering materials 7, subjected to elastic deformations correspondingly to the logo pattern 4, are so provided in at least one space between the lamination surface of the laminated resin films and the pressing die 8 as to form irregular logomarks 9 in the lamination surfaces of the laminated resin films. Therefore, the logomark-bearing board, having the logomark 9 formed by irregularities can be formed easily, without creating newly the pressing die 8 for each logomark 9. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a passive device built-in substrate, as well as its fabrication method, that has passive devices built-in such as a capacitor, resistance, etc., and whose structure and manufacturing steps are simplified. SOLUTION: The passive device built-in substrate has multiple resin films 23 including thermoplastic resin, conductor patterns 22 laminated alternately with these multiple resin films 23, and electrically conductible compositions 51 that electrically connect the conductor patterns 22 embedded in via holes 24 formed in each resin film 23 and set on both sides of each resin film 23. A pair of conductor patterns 22a and 22b are arranged on both sides of the resin film 23 at opposite positions with only the resin film 23 between, thus building a passive device functioning as a capacitor 30 in a multilayer substrate. Accordingly, there is no need to use any special materials and others for building the capacitor 30, and its structure is very streamlined. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To bond a plurality of resin films in a batch by a heading/pressurizing process by preventing the occurrence of displacement in a conductor pattern formed on a resin film. SOLUTION: A plurality of single-sided conductor pattern films 21 are laminated, and heated/pressurized from both sides so that the conductor pattern films 21 can be bonded to each other to form a multi-layer board 100. In heating/ pressurizing those conductive pattern films, members 12a and 12b for press having buffering effects are interposed between thermal press boards 10a and 10b and the single-sided conductor pattern films 21. Thus, pressures to be applied to the respective parts of the laminated single-sided conductor pattern films 21 can be made almost uniform. Therefore, the whole laminated single-sided conductive pattern films 21 are almost simultaneously deformed so that the displacement in a conductor pattern 22 formed on each of those films 21 can be prevented. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a multilayer board, where laminated resin films can be prevented from getting out of position, and the laminated conductor patterns of the multilayer board are surely interconnected. SOLUTION: Laminated resin films 23 are partially melted by heating so as to be temporarily fixed before the resin films 23 are positioned, laminated, and bonded together through a thermocompression bonding process in a case of laminating resin films 23 of thermoplastic resin into a multilayer board 10. By this setup, the laminated resin films 23 can be easily, surely, and temporarily fixed, so that the laminated resin films 23 can be prevented from getting out of position.
Abstract:
PROBLEM TO BE SOLVED: To provide a temperature sensor having a plurality of independent thermocouples whose manufacturing process is not complex and whose costs can be reduced, and to provide a manufacturing method of the temperature sensor. SOLUTION: First, a one-sided conductor pattern film 11 where a copper wire-like conductor pattern 12 is formed on one surface of a resin film 13 by etching and conductive paste 50 is filled into a via hole 14, and a one-sided conductor pattern film 21 where a nickel wire-like conductor pattern is formed on one surface of a resin film 23 by etching are stacked alternately and are heat-pressed, thus bonding each of the conductor pattern films 11 and 21, at the same time forming a coupling section where a pair of conductor patterns 11 and 21 is electrically connected. Then, the tip side is eliminated up to a position where the coupling section 60 is exposed, thus obtaining a temperature sensor 10 having a plurality of independent paired thermocouples. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To improve reliability in strength of a soldering part even through the soldering is performed at a low cost. SOLUTION: A printed board 13 is composed of lots of alley shaped electrodes 14 corresponding to the solder balls 12 of CSP parts 11. The electrode 14 is composed of (a) an electroless nickel plating layer 17 and further an electroless gold plating layer 18 formed on the surface of an electrode substrate 16 consisting of a coper foil. Solder paste 19 is printed and applied (b) to the electrode 14 of the printed board 13 and the CSP parts 11 are mounted. By performing a reflow soldering process in which the printed circuit board 13 is passed through the inside of a reflow furnace at a prescribed speed, a solder joint 20 is formed (d). At this time, by the control of the moving speed of the printed circuit board 13, a time required for the printed circuit board 13 passing through a reflow temperature band becoming 185 deg.C or over, that is, a time in which the solder paste 19 has been melted, is secured for 60 seconds or over, in this case about 90 to 100 seconds are secured.