Adhesion and Puncture Strength of Polyurethane Coating Used to Mitigate Tin Whisker Growth
Published: |
January 26, 2022 |
Author: |
Kenny Mahan, Yong Sun, Bongtae Han1, Sungwon Han, Mike Osterman |
Abstract: |
Reliability of conformal coatings used to mitigate tin whisker growth depends on their ability to contain tin whiskers. Two key material properties required to assess the reliability of a polyurethane coating are documented experimentally: adhesion strength and puncture strength. A modified blister test using a predefined blister area is employed to assess the adhesion strength and a puncture test is employed to evaluate the puncture strength of the coating. After measuring the properties at time zero, the coatings are subjected to accelerated testing conditions (high temperature/humidity storage and temperature cycling) and the degradations of the coating properties are documented.... |
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