Explain chemically resistant polymer is printed on the board

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Reference no: EM13273814

In the production of printed circuit boards for the electronics industry, a 0.235 mm layer of copper is laminated onto an insulating plastic board. Next a circuit pattern made of a chemically resistant polymer is printed on the board. The unwanted copper is removed by chemical etching and the protective polymer is finally removed by solvents. One etching reaction is

Cu(NH3)4Cl2(aq) + 4NH3(aq) + Cu(s) ? 2Cu(NH3)4Cl(aq)

A plant needs to manufacture 10900 printed circuit boards, each 5.15cm x 18.0cm in area. An average of 75.0% of the copper is removed from each board (density of copper=8.96g/cm3.) What mass of Cu(NH3)4Cl2 reagent is required?

Reference no: EM13273814

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