Abstract:
A substituted oligofluorene for organic light-emitting diode (OLED) and organic photoconductor (OPC) has a chemical structure of: wherein X and Y are an integer of 0 or 1, G1 and G2 are independently of either CnH2n+1 or CnH2n+1O; and n is an integer of 0 to 16.
Abstract translation:用于有机发光二极管(OLED)和有机光电导体(OPC)的取代的低聚芴具有以下化学结构:其中X和Y为0或1的整数,G 1和G 2, 2个独立于C n H 2n + 1或C n H 2n + 1 / O; n为0〜16的整数。
Abstract:
The present invention relates to a table structure that can be converted into bed or table according to user's needs. Wherein a base frame of the present invention is respectively provided with a bed having two L-shape side frames and a table having two side shelves. The two side shelves of the table are connected to the base frame through spiral arms, by virtue of the pivotal connection between the L-shape side frames and the side shelves, the bed can be positioned respectively in a horizontal manner or in a vertical manner. Through the spiral arms, the table can be lowered down or raised up relative to the bed, such that the device of the present invention can be converted into a bed or a table as desired.
Abstract:
Novel methods for reducing shear stress applied to solder bumps on a flip chip. The methods are particularly applicable to reducing temperature-induced shear stress on solder bumps located adjacent to an empty space on a flip chip during high-temperature testing of the chip. According to a first embodiment, the method includes providing an anchoring solder bump in each empty space on the flip chip. The anchoring solder bumps impart additional structural integrity to the flip chip and prevent shear-induced detachment of solder bumps from the flip chip, particularly those solder bumps located adjacent to each anchoring solder bump. According to a second embodiment, the method includes providing an anchoring solder bump in the empty space and then connecting the anchoring solder bump to an adjacent solder bump on the chip using a solder bridge.
Abstract:
A method of forming a heat spreader ball grid array package, and the resultant heat spreader ball grid array package, comprising the following steps. A semiconductor chip affixed to a ball grid substrate is provided. The semiconductor chip over the ball grid substrate is encased with a molding compound. A heat spreader is mounted over the ball grid substrate and spaced apart from the molding compound to form a gap. Thermal grease is placed into the gap, at least between the heat spreader and the molding compound, to form the heat spreader ball grid array package. It is also possible to place thermal grease over the molding compound and then mounting the heat spreader over the ball grid substrate.