Micro-wires bonded on a silicon chip. Coloured Scanning Electron Micrograph (SEM) of the bonded end of a micro-wire on a silicon chip. Micro- wires are often made of gold. They link the integrated circuit of a silicon chip to pins by which the chip is connected to its outside electronic environment (such as a computer circuit board). This is integrated circuit M316 S32A. Magnification: x280 at 6x7cm size. x740 at8x6, x395 at 10x7cm master size"