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Design007-Oct2019

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64 DESIGN007 MAGAZINE I OCTOBER 2019 In my last column, I looked at how to se- lect the appropriate resin for your requirement, bearing in mind that correct product selection is affected by the physical constraints of the board or area to be covered as well as other issues. In this month's column, I am going to concentrate on protecting sensitive compo- nents and take a more in-depth look at flex- ible resins, their reworkability, and some of the common problematic consequences that you may encounter. Potting compounds play an important role in the electronics industry where they serve to protect sensitive com- ponents from chemicals, moisture, dust, and damage, but their selection can baffle many. Let's explore some frequently asked questions in more detail. 1. What Are the Key Considerations When Selecting a Resin for Potting Sensitive Components? There are many crucial factors to consider when choosing a suitable resin to pot sensi- tive components. First, you need to determine what temperature range is expected and look at the design, shape, and dimensions of the components. For instance, does a component have long thin legs that could be snapped off? It is also important to determine how large a volume of resin will be necessary to enable the degree of protection required. Further, it is advisable to check the compat- ibility of the resin with the housing material. In the majority of cases, there aren't any com- patibility issues, but it's worth checking just Five Key Factors for Flexible Resins and Potting Sensitive Components Sensible Design by Alistair Little, ELECTROLUBE

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