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Design007-Oct2018

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OCTOBER 2018 I DESIGN007 MAGAZINE 55 metalization alloy. The smallest outline and thinnest profile devices are the most critical attributes for embedding. As noted in Part 3, the smallest discrete resistor is furnished in a standard 01005 component outline and is available in most standard values. For exam- ple, Table 2 shows dimensions for six standard outline variations of the surface mount resistor family. However, due to their excessive thick- ness, any component larger than the 0402 in this family may not be suitable for embedding. Discrete resistors are all rectangular in shape with a metal-oxide film deposited onto a high-alumina ceramic base and terminated at electrodes at two ends. For example, the 01005 device in Table 2 only measures 0.40 x 0.20 mm, and the component thickness does not exceed 0.15 mm. This component is 55% Table 1: Land pattern development for two terminal passive components. Table 2: SMT resistor family.

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