ECT is the art of embedding passive or active components within a substrate. This embedding can take place on a single
layer of material, a combination of material layers or even can be achieved by placing a component within a cavity in a substrate.
• A square area of resistive material = sheet resistivity of resistive material E.g., a 25Ω/ϒ(Ohms/Square) sheet resistance
• Resistor value = sheet resistivity x ratio of element length to width: R = Rs x L/W
E.g., a 25Ω/ϒ sheet resistivity - Length = 0.030"(30 mils); Width = 0.015"(15mils)
Resistor value = 25Ω/ϒ x (30mils/15mils) = 25 Ω/ϒ x 2 squares = 50 ohms
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