Micro-wires bonded on a silicon chip. Coloured Scanning Electron Micrograph (SEM) of the bonded ends of two micro-wires 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: x210 at 5x7cm size. x500 at 16x12cm ptint