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Chapter 5: Conservation

Printed Wiring Boards Cleaner Technologies Substitutes Assessment: Making Holes Conductive

Businesses are finding that by conserving natural resources and energy they can cut costs, improve the environment, and improve their competitiveness. And due to the substantial amount of rinse water consumed and wastewater generated by traditional electroless copper processes, water conservation is an issue of particular concern to printed wiring board (PWB) manufacturers and to the communities in which they are located. This chapter of the Cleaner Technologies Substitutes Assessment (CTSA) evaluates the comparative resource consumption and energy use of the making holes conductive (MHC) technologies. Section 5.1 presents a comparative analysis of the resource consumption rates of MHC technologies, including the relative amounts of rinse water consumed by the technologies and a discussion of factors affecting process and wastewater treatment chemicals consumption. Section 5.2 presents a comparative analysis of the energy impacts of MHC technologies, including the relative amount of energy consumed by each MHC process, the environmental impacts of this energy consumption, and factors affecting energy consumption during other life-cycle stages, such as chemical manufacturing or MHC waste disposal.


5.2 ch5-2.pdf [60K PDF file]

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