Abstract: A method for manufacturing a circuit board including: providing at least one wiring base board, the wiring base board comprising a first conductor layer, an insulation layer, and an alloy layer which are stacked in order, wherein a solder paste layer is formed on a side of the alloy layer, a part of the alloy layer is exposed out of the solder paste layer to form a thermal conductive surface; providing a core layer; and pressing two wiring base boards on two opposite sides of the core layer to form a sealed heat dissipating chamber between the thermal conductive surfaces of the two wiring base boards. The present disclosure further provides a circuit board having a heat dissipation structure.

Abstract: A novel additive comprising an oxamide additive with long chains is described herein. The additive can be incorporated into a thermoplastic polymer to form a thermoplastic polymer composite. The additive modifies the surface of the thermoplastic polymer to render the oil, water or dust repellent properties to the thermoplastic polymer composite.

Abstract: The present invention relates to an alloy with composition of RE-Fe-M-B as defined herein, wherein said alloy comprises at least 80 vol % RE2Fe14B phase, the average crystal grain size of the RE2Fe14B phase is in the range of about 20 nm to about 40 nm, and the alloy is an alloy ribbon having a width measured from a left edge to a center portion to a right edge, and the average crystal RE2Fe14B grain size difference between the center portion, and left and right edges of said alloy ribbon is less than 20%. The present invention also relates to a method for preparing an alloy ribbon with composition of RE-Fe-M-B as defined herein comprising the steps of: (i) ejecting a melt of the alloy with composition of RE-Fe-M-B onto a rotating wheel at a mass flow rate of about 0.2 kg/min to about 1.

Abstract: A planetary gear apparatus that includes a pair of internal ring gears (24a, 24b) interconnected to be driven together, a pair of planetary gear assemblies (25a, 25b) each associated with a respective internal ring gear (24a, 24b), and each comprising plural pairs of planet gears (48, 49), where each pair of planet gears (48, 49) has an outer planet gear (48) in mesh with the respective internal ring gear (24a or 24b) and with its inner planet gear (49); and a pair of sun gears (27a, 27b) each associated with a respective planetary gear assembly (25a, 25b).

Abstract: A planetary gear apparatus that includes a pair of internal ring gears (24a, 24b) interconnected to be driven together, a pair of planetary gear assemblies (25a, 25b) each associated with a respective internal ring gear (24a, 24b), and each comprising plural pairs of planet gears (48, 49), where each pair of planet gears (48, 49) has an outer planet gear (48) in mesh with the respective internal ring gear (24a or 24b) and with its inner planet gear (49); and a pair of sun gears (27a, 27b) each associated with a respective planetary gear assembly (25a, 25b).