Abstract:
A conductive circuit pattern portion is formed on an insulating substrate film, the pattern portion being constituted by a laminate of a thin metal film pattern layer with excellent electrical properties and an easily formable printed pattern layer, and a hot-melt adhesive layer with anisotropic electrical conductivity is further formed on the circuit pattern portion, whereby it is possible to easily a flexible conductive film connector which is accurately formed with a minute conductive circuit pattern having excellent electrical characteristics. The conductive film connector has excellent electrical characteristics and makes it possible to obtain complete adhesion. Further, there is no danger that the conductive film connector will fail as a result of long use; hence, it provides a highly reliable connection.
Abstract:
A method of applying viscous media on a substrate is disclosed. In the method, the substrate is provided, which is arranged for mounting of electronic components thereon. Further, flux is provided on a deposit of solder paste, which deposit is arranged at a predetermined position on the substrate. The flux is provided by a non-contact dispensing process, such as jetting. By providing flux on the deposit prior to reflow, the risk of quality related issues, such as e.g. graping, advantageously is reduced.
Abstract:
The invention provides processes for the manufacture of conductive transparent films and electronic or optoelectronic devices comprising same.
Abstract:
To provide an electronic component placing apparatus and an electronic component mounting method that can prevent a cold joint from occurring when an electronic component likely to cause warp deformation is mounted by means of soldering. In the electronic component placing apparatus for placing the electronic component 16 with a plurality of solder bumps 16a formed on a lower surface on a board, a film 7a having a film thickness distribution for transferring a desired transfer amount of solder paste according to a state of warp deformation to each of the plurality of solder bumps is formed in a paste transfer unit 24, based on the component warp information indicating the state of warp deformation in a reflow process of the electronic component. Thereby, it is possible to prevent a cold joint from occurring when the electronic component likely to cause warp deformation is mounted by means of soldering by additionally supplying a just enough amount of solder to each solder bump 16a.
Abstract:
A system and a method are provided for ink-jet printing a solderable conductive pad onto a substrate. The system comprises at least one print head and a curing station for curing an ink deposited onto the substrate. The system is configured to: deposit at least a first layer of a first ink onto the substrate; cure the first layer of the first ink; deposit at least an intermediate layer of a second ink on top of the cured first layer of the first ink; cure the intermediate layer of the second ink; deposit at least a last layer of the first ink on top of the cured intermediate layer of the second ink; and cure the last layer of the first ink. The first ink has a relatively high conductivity. The second ink has a relatively low conductivity. The first layer, the intermediate layer, and the last layer may be arranged such that when solder is applied to the last layer, the solder is prevented from leaching through to the first layer.
Abstract:
A system and a method are provided for ink-jet printing a solderable conductive pad onto a substrate. The system comprises at least one print head and a curing station for curing an ink deposited onto the substrate. The system is configured to: deposit at least a first layer of a first ink onto the substrate; cure the first layer of the first ink; deposit at least an intermediate layer of a second ink on top of the cured first layer of the first ink; cure the intermediate layer of the second ink; deposit at least a last layer of the first ink on top of the cured intermediate layer of the second ink; and cure the last layer of the first ink. The first ink has a relatively high conductivity. The second ink has a relatively low conductivity. The first layer, the intermediate layer, and the last layer may be arranged such that when solder is applied to the last layer, the solder is prevented from leaching through to the first layer.
Abstract:
A circuit board ( 100) includes at least one trace (104a-d, 205, 305) having at least one heat spreader (120-123, 220, 223, 3 10) disposed thereon, the heater spreader being formed of a solidified paste, such as a paste that includes a mixture of binder particles and filler particles, or a solder paste. As an example, the heater spreader may be configured to increase a cross-sectional area of a portion of the trace, thereby improving heat flow along that portion of the trace. Alternatively, the heater spreader may be configured to increase the surface area of the trace, thereby increasing heat dissipation from the circuit board. As another example, the heat spreader may be disposed between the trace and a semiconductor device ( 108-1 10, 308) and thereby function as a heat sink for the device.
Abstract:
An LTCC module (10) includes a base (24) on one or more surfaces for receiving one or more external components (26, 30, 36) to be attached to the module. A base (24) is formed of a plurality of layers of metallization (12) in a predetermined pattern. The layers include an adhesion layer (44) on the LTCC module surface, with one or more intermediate layers (46), followed by a top layer (48). The module is fired with each application of the layers at a reduced temperature lower than the normal cofÊring temperamre of the LTCC module, but of sufficient value to partially sinter the layers. After the last applied top layer, the module is fired once at an elevated temperature to fully sinter the layers.