Abstract:
PROBLEM TO BE SOLVED: To provide a method of forming metal wiring; and metal wiring formed using the same. SOLUTION: This method of forming metal wiring includes steps of: printing wiring using an ink composition including metallic nanoparticles and a dispersant for maintaining the metallic nanoparticles in a dispersed state; primary firing of firing the wiring in a vacuum or inactive atmosphere to suppress particle growth; and second firing of firing the wiring by releasing the vacuum or inactive atmosphere to accelerate particle growth. The method of forming metal wiring induces abnormal particle growth by rapidly removing dispersant for inducing the growth of metallic nanoparticles, at a temperature at which the growth drive force of the metallic nanoparticles is high, in the process of firing the metallic nanoparticles. Thereby, the metal wiring includes a dense structure large in an average particle diameter of the particles, and excels in the electrical and mechanical characteristics. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To decrease the amount of inactive gas amount necessary for reflow to interconnect the connection terminals of a head slider and a suspension. SOLUTION: According to one embodiment, an inactive gas is sprayed from the nozzle 30 of a reflowing device to the interconnected parts of a head slider 121 and a suspension 114. The head slider 121 is fixed on a gimbal tongue 119. The nozzle 30 includes a tube 31 through which the inactive gas passes, and a porous member 32 fixed to the injection port of the tube 31. The porous member 32 is disposed in a position near the head slider 114. Thus, oxygen concentration around a solder ball 24 is effectively reduced. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a reflow soldering method that is effective for improvement of solder leakage in case where a conductive paint is used for a circuit pattern and a land pattern. SOLUTION: In a step for conducting reflow soldering, a preliminary heating temperature is set at 150-190°C to activate a flux, and its preliminary heating time is set to a range of 60±30 seconds. In addition, the substrate is preliminary heated in a nitrogen atmosphere. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a mounting method for connecting electronic components to a board through normal temperature jointing, without applying severe pretreatment for a connection surface due to CMP (chemical mechanical polish) or electrolytic polishing, in order to suppress dispersions in roughness or the height of connection surfaces of the electronic components, such as semiconductor chips, semiconductor packages or the like or bumps on the mounting board. SOLUTION: A connection member of at least one of the electronic component and the substrate is formed of a solder material, and the electronic component is contacted with the connecting member of the substrate at a normal temperature. As the solder material, a material, in which a load upon showing the changing amount of 8μm in the direction of the height of a spherical bump, having a diameter of 130μm in a direction parallel to an electronic component body is not larger than 100g, when a vertical load is applied, is employed. COPYRIGHT: (C)2005,JPO&NCIPI