http://www.aosmd.com/res/data_sheets/AONP36336.pdf
Why do MOSEFT manufacturers provide a void as shown below?
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asked Jul 1, 2021 at 19:16
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1 Answer
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It's called a wettable flank to make the soldered joint easier to inspect. If part of the pad reaches the side, a correctly soldered joint with enough paste that reflows correctly will develop a little fillet on the exposed side. See figure 5 for "side wall plated": https://www.st.com/resource/en/technical_note/dm00298756-leadless-packages-with-enhanced-board-level-solder-joint-reliability-for-automotive-application-stmicroelectronics.pdf
