Computer Chips on a Wafer - Chrontel Silicon Wafer, 6", 150mm

About the Silicon Wafer This six-inch silicon wafer was made by Chrontel, Inc. in 1994. The wafer has over 2,800 computer chips on it, each 2mm square. These chips are Chrontel CT195s. These chips allowed a personal computer's inside digital world to interface to the real outside analog world. These chips sold for about $7.50 in today's dollars. At 2,800 total chips on the wafer, this wafer would have a about $30,000 value (given 100% yield). Below are more pictures of the chip on this wafer. The top right picture is a black and white picture of a whole chip. The picture below it is of the area contained in the small red rectangle in the upper picture. This area has circuitry that is similar to the rest of the chip. The yellow lines are traces. Traces are the wires that connect the various part of the circuit together. There are many transistors in the picture but they are difficult to see since they are built in a vertical fashion. This wafer was fabricated with at least ten layers.