摘要:
Disclosed is a semiconductor device having a structure capable of reducing the self-inductance of internal wiring. The semiconductor device includes: a lower board having a lower conductor layer formed on the surface thereof; a switching element bonded to the lower conductor layer in an element bonding area; a terminal bonded to the lower conductor layer in a terminal bonding area; an upper board stacked on the lower board in a board bonding area between the element bonding area and the terminal bonding area, and having an upper conductor layer on the surface thereof; and a switching element connecting member which connects the switching element with the upper conductor layer.
摘要:
A method for establishing a thermal interface (1000) between an electrical component (200) and a heat sink (100) including the selection of a compound having a melt temperature above the normal operating temperature of the component (200). The electrical component (200) initially reaches an initial operating temperature sufficient to deform or melt the compound and fill the spaces between the mating surfaces (210, 110) of the component (200) and heat sink (100). Upon cooling, a solidified thermal joint (1000) is permanently established which precludes the component (200) from heating beyond its normal operating temperature upon subsequent operation. As the normal operating temperature of the component (200) is below the melt point of the compound, the compound remains in a solid state. The compound is selected so as to deform only during initial component (200) operation so as to avoid the problems of liquefaction. An alternative compound is selected with the above attributes along with desired adhesive characteristics to fix the component (200) to the heat sink (100) with the compound therebetween at low closure forces.
摘要:
A cooling system for electronic components and printed circuit boards (PCBs) provides close thermal contact of a bulk coolant circulating through channels formed inside or on the surface of a multi-layer PCB carrying the electronic components, such that heat produced by the components is efficiently removed to a heat sink. The circulation channels may be formed by removing portions of layers, and inserting overlaying vias, during manufacturing or assembly of the PCB.
摘要:
A device comprises a surface mount component on a substrate, in which the surface mount component is attached by a set of discrete mechanical coupling parts and by a bonding layer. This enables the mechanical coupling properties and the electrical/thermal properties to be optimized separately.
摘要:
Provided herein are conductive die attach films having advantageous properties for use in a variety of applications, e.g., for the preparation of large die semiconductor packages. Also provided are formulations useful for the preparation of such films, as well as methods for making such formulations. In additional aspects of the present invention, there are provided conductive networks prepared from compositions according to the present invention. In additional aspects, the invention further relates to articles comprising such conductive die attach films adhered to a suitable substrate therefor.
摘要:
LED chip packaging assembly that facilitates an integrated method for mounting LED chips as a group to be pre-wired to be electrically connected to each other through a pattern of extendable metal wiring lines is provided. LED chips which are electrically connected to each other through extendable metal wiring lines, replace pick and place mounting and the wire bonding processes of the LED chips, respectively. Wafer level MEMS technology is utilized to form parallel wiring lines suspended and connected to various contact pads. Bonding wires connecting the LED chips are made into horizontally arranged extendable metal wiring lines which can be in a spring shape, and allowing for expanding and contracting of the distance between the connected LED chips. A tape is further provided to be bonded to the LED chips, and extended in size to enlarge distance between the LED chips to exceed the one or more prearranged distances.
摘要:
Heat dissipating plate (4) made of copper-base alloy is proposed that exhibits high degree of flatness after joining in the step of assembling power semiconductor modules, IC packages, etc., that will not crack in the solder (3) joint if subjected to heat cycles during joining or in an environment of use, and that has high heat conductivity and cost effectiveness. The heat dissipating plate (4) uses a copper-base alloy having a 0.2% yield strength of at least 300 N/mm 2 which is characterized in that the 0.2% yield strength after heating at 400 °C for 10 minutes is at least 90% of the 0.2% yield strength before heating and that said copper-base alloy has a heat conductivity of at least 350 W/m·K and contains at least one element of the group consisting of Fe, Co and Ni plus P in a total amount of 0.01-0.3%; the heat dissipating plate (4) is 10-200 mm long on each side, 0.1-5 mm thick and warped by 200 µm or less in a curved shape with a radius of curvature of at least 100 mm; this heat dissipating plate (4) exhibits high degree of flatness after the assembling step and assures improved heat dissipating performance.
摘要:
LED chip packaging assembly that facilitates an integrated method for mounting LED chips as a group to be pre-wired to be electrically connected to each other through a pattern of extendable metal wiring lines is provided. LED chips which are electrically connected to each other through extendable metal wiring lines, replace pick and place mounting and the wire bonding processes of the LED chips, respectively. Wafer level MEMS technology is utilized to form parallel wiring lines suspended and connected to various contact pads. Bonding wires connecting the LED chips are made into horizontally arranged extendable metal wiring lines which can be in a spring shape, and allowing for expanding and contracting of the distance between the connected LED chips. A tape is further provided to be bonded to the LED chips, and extended in size to enlarge distance between the LED chips to exceed the one or more prearranged distances.
摘要:
A component built-in board comprises stacked therein a plurality of printed wiring bases having a wiring pattern and a via formed on/ in a resin base thereof, and comprises an electronic component built in thereto, wherein at least a portion of the plurality of printed wiring bases include a thermal wiring in the wiring pattern and include a thermal via in the via, at least one of the plurality of printed wiring bases has formed therein an opening where the electronic component is built, and has formed therein a heat-conducting layer and closely attached to a surface on an opposite side to an electrode formation surface of the electronic component built in to the opening, and the electronic component is fixed in the opening by an adhesive layer stacked on the heat-conducting layer, via a hole formed in a region facing onto the opening of the heat-conducting layer.