Abstract:
A light emitting device module is provided comprising a light emitting device package, a printed circuit board on which the light emitting device package is arranged and a sealing member that surrounds the light emitting device package and the printed circuit board, wherein a predetermined space is formed between the light emitting device package and the printed circuit board and the sealing member.
Abstract:
A suction surface member is provided on an electronic component module including an electronic component base plate and surface mount device mounted on the electronic component base plate in order to provide a suction surface at a location that is substantially at the same level as or higher than that of an upper end of a transistor that is the tallest surface mount device. The suction head adheres to the suction surface to hold the electronic component module and the electronic component module is mounted on a motherboard defining the target board. Then a treatment is performed to prevent a situation in which an upper end of the suction surface member is higher than the upper end of the tallest surface mount device mounted on the electronic component base plate.
Abstract:
A chip carrier film comprising a metal wiring formed on a surface of a base film, a first insulating film covering the metal wiring excluding a semiconductor chip connecting pad portion and a terminal connecting pad portion, a semiconductor chip connected to the semiconductor chip connecting pad portion of the metal wiring and mounted on the base film, and a second insulating film formed on a back face of the base film and having a different coefficient of curing shrinkage from that of the first insulating film. It is possible to obtain a chip carrier film capable of preventing the suspension of the base film from being generated by the self weight of the semiconductor chip when holding the base film by the delivery device and of carrying out mounting without a hindrance.
Abstract:
A chip carrier film comprising a metal wiring formed on a surface of a base film, a first insulating film covering the metal wiring excluding a semiconductor chip connecting pad portion and a terminal connecting pad portion, a semiconductor chip connected to the semiconductor chip connecting pad portion of the metal wiring and mounted on the base film, and a second insulating film formed on a back face of the base film and having a different coefficient of curing shrinkage from that of the first insulating film. It is possible to obtain a chip carrier film capable of preventing the suspension of the base film from being generated by the self weight of the semiconductor chip when holding the base film by the delivery device and of carrying out mounting without a hindrance.
Abstract:
The present invention provides a method for mounting a semiconductor element to a circuit board and a semiconductor device whereby connection reliability and connection strength in bonding of the semiconductor element and circuit board are enhanced and a connection resistance value is stabilized low. An insulating adhesive is applied to an opposite face of a circuit board. The circuit board is then connected with a semiconductor element by a conductive adhesive and the insulating adhesive which are interposed between an electrode on the circuit board and the projecting electrode and set in the same process. The circuit board and semiconductor element are connected by the insulating adhesive in addition to the conductive adhesive, so that connection reliability and connection strength are high and a connection resistance value is stabilized low.
Abstract:
The thermomechanical stress sensitivity of ball grid array (BGA) solder connections is significantly reduced, when the solder connections solidify in column-like contours after the reflow processnulla result achieved by using the solder material in tapered openings of a thick sheet-like elastic polymer adhered to the BGA substrate and selected for its characteristics of non-wettability to solder and volumetric shrinkage greater than solder.
Abstract:
In a method of mounting an electronic component by connecting leads of an electronic component and electrodes on a printed circuit board using isotropic conductive adhesive comprising a resin-based binder mixed with filler, the isotropic conductive adhesive is supplied to the electrodes on the printed circuit board by an ink jet type adhesive coating device. Also, in a method of mounting an electronic component by connecting leads of an electronic component and electrodes on a printed circuit board using isotropic conductive adhesive comprising conductive high polymer material, the isotropic conductive adhesive is supplied to the electrodes on the printed circuit board by an ink jet adhesive coating device. Also, in a method of mounting an electronic component by connecting leads of an electronic component and electrodes on a printed circuit board using anisotropic conductive adhesive comprising a resin-based binder mixed with filler, the electronic component is mounted on the printed circuit board using the anisotropic conductive adhesive which shrinks and cures by heating so as to electrically and mechanically connect the leads and electrodes.
Abstract:
A method of forming conductive structures on the contact pads of a substrate, such as a semiconductor die or a printed circuit board. A solder mask is secured to an active surface of the substrate. Apertures through the solder mask are aligned with contact pads on the substrate. The apertures may be preformed or formed after a layer of the material of which the solder mask is comprised has been disposed on the substrate. Conductive material is disposed in and shaped by the apertures of the solder mask to form conductive structures in communication with the contact pads exposed to the apertures. Sides of the conductive structures are exposed through the solder mask, either by removing the solder mask from the substrate or by reducing the thickness of the solder mask. The present invention also includes semiconductor devices formed during different stages of the method of the present invention.
Abstract:
A very small integrated circuit package. The package of the present invention includes a substrate or die coupled to a heatsink. The substrate or die has solder bumps for being directly mounted to a circuit board. The heatsink is coupled to the die before the die is mounted to the circuit board. The heatsink is mounted using adhesive. By mounting the heatsink before the die is mounted, the heatsink may be used to handle of the substrate or die during the manufacturing and testing process, thereby increasing the reliability of the die by increased protection.
Abstract:
In a method of assembling an electronic part device and a circuit board, an electrode formed on the electronic part device and a conductive pattern formed on the circuit board so as to be opposite to the electrode are positioned, and a thermosetting resin sheet including a thermally shrinkable particle and provided between the electronic part device and the circuit board is hardened and shrunk.