Abstract: Package structures and methods for manufacturing the same are provided. The package structure includes a first bump structure formed over a first substrate. The first bump structure includes a first pillar layer formed over the first substrate and a first barrier layer formed over the first pillar layer. In addition, the first barrier layer has a first protruding portion laterally extending outside a first edge of the first pillar layer. The package structure further includes a second bump structure bonded to the first bump structure through a solder joint. In addition, the second bump structure includes a second pillar layer formed over a second substrate and a second barrier layer formed over the second pillar layer. The first protruding portion of the first barrier layer is spaced apart from the solder joint.

Abstract: A road bicycle handlebar comprises a base, a brake control handle, a gear shift handle, a cushion and three spherical cushions. The cushion covers a holding portion of the base for making the holding more comfortable. The three spherical cushions are respectively assembled on the brake control handle and the gear shift handle to make the riding more comfortable. The brake control handle is defined with a groove for placement of fingers of the hand to allow the hand of the rider to be always maintained in a ready-to-press-the-brake-control-handle state, thus improving the riding safety.

Abstract: An ergonomic road bicycle handlebar comprises a base, a brake control handle a gear shift handle, a cushion that covers a holding portion of the base and three spherical cushions. The brake control handle and the gear shift handle both of which are pivotally coupled to the holding portion are respectively covered with a spherical cushion. Moreover the cushion and the spherical cushions are all made of elastic material to improve the feeling of gripping and the using and to provide the buffer function for absorbing the shake caused during the riding process.

Abstract: A bicycle hub includes a tubular body and a first flange, a second flange and a third flange extend radially from an outer surface of the tubular body. The third flange is located between the first flange and the second flange. Each of the first flange, the second flange and the third flange has holes defined therethrough so as to be connected with spokes. The diameter of the three flanges and the radial distance of the holes in the three flanges may be different so as to obtain a desired rim according to the way of use of the bicycle wheel.

Abstract: A handlebar structure includes a handlebar body having two end portions each provided with a first face having an arcuate convex shape and a second face formed with a recess. Thus, the arcuate convex configuration of the first face of the handlebar body satisfies the ergonomic design, so that when the user's hand holds the handlebar body, the first face of the handlebar body provides a comfortable sensation to the user's hand, thereby facilitating the user's hand holding the handlebar body.

Abstract: A bicycle hub includes a tubular body and a first flange, a second flange and a third flange extend radially from an outer surface of the tubular body. The third flange is located between the first flange and the second flange. Each of the first flange, the second flange and the third flange has holes defined therethrough so as to be connected with spokes. The diameter of the three flanges and the radial distance of the holes in the three flanges may be different so as to obtain a desired rim according to the way of use of the bicycle wheel.

Abstract: A crank structure includes a first combination block, a second combination block, a core layer, a resin layer, and an outer layer. Thus, the crank structure is formed by and entirely coated with the carbon fiber material without providing any metallic material, so that the crank structure has a light weight, thereby decreasing the whole weight. In addition, the crank structure is entirely coated with the carbon fiber material without forming any connection points, thereby enhancing strength and stiffness of the crank structure.

Abstract: A handlebar stem includes a stem and a first connection member has a first hole defined therein so that a first end of the stem is inserted in the first hole. A first passage is defined through the first connection member so as to receive a steerer tube. A second connection member has a second hole and a second end of the stem is inserted in the second hole. A second passage is defined through the second connection member so as to be connected to a handlebar. The second end of the stem is inserted in the second hole of the second connection member. The shape of the stem can be made according to needs and the first connection member and the second connection member do not need to have long insertions.

Abstract: A bicycle crank includes a first connection portion with a first outer threaded portion and a second connection portion with a second outer threaded portion. A core portion made of carbon-fiber is connected between the first connection and the second connection portion. The first outer threaded portion and the second outer threaded portion are partially embraced by the core portion. An outer layer made of carbon-fiber is coated to the first connection portion, the second connection portion and the core portion.

Abstract: A bicycle crank includes a threaded hole defined through an end thereof and a threaded member has a threaded shank which is threadedly engaged with the threaded hole. A flange extends radially from an end of the threaded shank and has two holes through which two fasteners extend and are engaged with receiving holes in a surface of a stepped recess defined in the first side of the crank. A plurality of notches are defined in a periphery of the flange. A ring member is received in a second stepped recess defined in a second side of the crank and has an threaded inner periphery which is threadedly connected to the threaded shank on the second side of the crank. The ring member has a plurality of notches defined in a periphery of the ring member.

Abstract: A bicycle wheel rim includes a plurality of connectors each having a spoke engaging hole for connecting with a spoke, and two protrusions extend from two ends of each connector. A plurality of holes are defined through each protrusion and a plurality of loops extend through the holes of the connectors which are arranged as a circle. Each protrusion has a recess defined in an inside thereof so as to be engaged with a tire. The loops and the connectors are made by carbon fiber or compound material.

Abstract: A bicycle handlebar stem assembly includes a stem with two lugs extending from one of two ends of the stem. A first connection member has an aperture through which the stem extends, and two recesses are defined in an inside of the first connection member so as to receive the two lugs therein. A second connection member has a clamp part on one end thereof and an insertion extends from the other end of the second connection member. The insertion is inserted in the other end of the stem.

Abstract: A bearing assembly for bicycle connected to one of two ends of the head tube includes a first race having a skirt portion and a groove defined in an inner periphery of the skirt portion so as to receive beads therein. A second race is engaged with the skirt portion and positions the beads in the groove. An insertion extends from the first race and includes threads defined in an outer periphery thereof. The head tube has two inner threaded sections defined in an inner periphery in two open ends thereof and the insertion is threadedly engaged with one of the inner threaded sections of the head tube.

Abstract: A bottom bracket assembly includes a hollow bottom bracket having two protrusions extending an inside of the hollow bottom bracket and an axle rotatably extends through the bottom bracket and includes two ridges such that two retaining rings are mounted to the axle and stopped by the two protrusions. Each retaining member has a stop flange extending from an inside thereof. Steel balls are retained in a space between the retaining rings, the flanges, the axle and the ridges.

Abstract: A bicycle handlebar assembly includes two brake levers connected thereto and each brake lever has two brake cables extending therefrom. The handlebar includes a bar connected to the handlebar stem and has two recesses defined in an outer surface thereof. Each recess includes two entrances which extend at angle relative to an axial direction of the recess. Each of the entrances is a plain surface. The recesses and the entrances receive the brake cables so that the brake cables do not protrude from the outer periphery of the bar.

Abstract: A bicycle chain wheel assembly includes an outer ring made of Aluminum Alloy with teeth defined in an outer periphery thereof, and an inner ring made of composite material which is light in weight. The inner ring is securely connected to an inner periphery of the outer ring by rivets. The chain wheel has durable outer ring that is engaged with bicycle chain and light inner ring, so that the whole weight of the chain wheel is light and meets the requirement of a modern bicycle.