Abstract: Electrodeposited copper foils having adequate puncture strength to withstand both pressure application during consolidation with negative electrode active materials during manufacture, as well as expansion/contraction during repeated charge/discharging cycles when used in a rechargeable secondary battery are described. These copper foils find specific utility as current collectors in rechargeable secondary batteries, particularly in lithium secondary battery with high capacity. Methods of making the copper foils, methods of producing negative electrode for use in lithium secondary battery and lithium secondary battery of high capacity are also described.

Abstract: A primary functional circuit board with the capability to verify the chip function by an alternative manner and a simplified design for reducing the fabrication cost includes circuit board, chip, verifying apparatus, and extending connection terminals distributed on periphery of the chip. The chip is disposed on the circuit board to execute a functional instruction of the primary functional circuit board. The extending connection terminals are the extension of connection pins of the chip. The verifying apparatus is implemented with a programmable chip having a firmware program needed for controlling the circuit under control. After the verifying apparatus is connected to the extending connection terminals, the switching device is used to select the chip or the programmable chip to control the circuit under control. The engineer can easily compare the difference between the two without a power interruption.

Abstract: A primary functional circuit board with the capability to verify the chip function by an alternative manner and a simplified design for reducing the fabrication cost includes circuit board, chip, verifying apparatus, and extending connection terminals distributed on periphery of the chip. The chip is disposed on the circuit board to execute a functional instruction of the primary functional circuit board. The extending connection terminals are the extension of connection pins of the chip. The verifying apparatus is implemented with a programmable chip having a firmware program needed for controlling the circuit under control. After the verifying apparatus is connected to the extending connection terminals, the switching device is used to select the chip or the programmable chip to control the circuit under control. The engineer can easily compare the difference between the two without a power interruption.