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Question: computer chips are etched on circular cylinder wafers of thickness 0.60mm that are sliced from a solid cylindrical silicon crystal of length 30cm . If each wafer can hold 100 chips, what is the maximum number of chips that can be produced from one entire cylinder.
In this circuit board from an LED table clock made in 2005, not only the discrete components, but the chip, are thru-hole devices. Thru-Hole Vs. Surface Mount. The thru-hole chip is not only thicker than the surface mount chip, but it eliminates the real estate underneath because the pins stick through. The board designer must route any traces from other layers around that part of the board.