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September 2016 • The PCB Magazine 53 the formulator of the dielectric may actually be the PCB fabricator. To illustrate this value chain, Figure 1 gives the example of the Epoxy value chain which serves as a realistic example for other resins as well. To get a more complete picture of the epoxy EPOXY: SUPPLY CHAIN AND USE IN ELECTRONICS supply chain's importance in electronic packag- ing, the following Figure 2 is an overview of the various applications. Suppliers of epoxy-based laminates, includ- ing prepregs, resin-coated foils, dielectric films, and soldermask are listed below. Some of these Figure 1: Example of value chain for epoxy. Figure 2: Example of epoxy resins as material building blocks for electronics.