Abstract:
PROBLEM TO BE SOLVED: To effectively prevent scattering of solder balls due to explosion caused by vaporization of a flux and spread of a melted solder to a surrounding area in reflow soldering.SOLUTION: In a semiconductor chip mounting method, a semiconductor chip 12 is mounted on a substrate 3 via a solder paste. The substrate 3 includes grooves 8 which continuously or discontinuously surround the solder paste. With this configuration, though a flux vaporizes in reflow soldering, since enough space is ensured, a failure such as a short-circuit caused by scattering of a solder ball does not occur. In addition, since a flow of the melted solder is blocked at the grooves, a mounting position of the semiconductor chip can be firmly determined at an intended position.
Abstract:
PROBLEM TO BE SOLVED: To provide an LED mounting substrate which forms a light emitting device achieving excellent light extraction efficiency, and to provide a manufacturing method of the LED mounting substrate.SOLUTION: An LED mounting substrate 10 according to one embodiment of this invention includes: a base substrate 11; a conductive pattern 12 which is located on the base substrate 11 and has recessed parts 12b on an upper surface; and a light reflection film 13 located in an inter-pattern gap 12a of the conductive pattern 12 on the base substrate 11 and the recessed parts 12b of the conductive pattern 12.
Abstract:
A wired-circuit-board assembly sheet includes a plurality of wired circuit boards and a supporting sheet for supporting the wired circuit boards in an aligned state. Each of the wired circuit boards includes a distinguishing mark forming portion to be formed with a distinguishing mark for distinguishing between defectiveness and non-defectiveness of the wired circuit board. The distinguishing mark forming portion is divided by a weir portion for preventing the distinguishing mark from flowing out from the distinguishing mark forming portion.
Abstract:
The LED unit 100 comprises a plurality of the LED module 1 and the heat radiation plate. Each the LED module 1 comprises the LED chip and the package for incorporating the LED chip therein; the package has the electrical insulation property. Each the package comprises the sub-mount member which is located between the LED chip and the heat radiation plate and which has heat conductivity; these are integrally formed. The LED modules are arranged on the first surface of the heat radiation plate. This configuration makes it possible for the LED unit to efficiently disperse the heat in the LED chip 10 to the heat radiation plate.