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並前往https://www.infineon.com/dgdl/Infineon-AN99178_Solder_Mask_and_Trace_Recommendations_for_FBGAs-ApplicationNotes-v04_00-EN.pdf?fileId=8ac78c8c7cdc391c017d0d54f9bd6df7

AN99178 - Solder Mask and Trace Recommendations for ...

1.2.1. SMD & NSMD Dimensions. The solder-ball land pads on the printed circuit boards can be either solder mask defined (SMD) or non-solder-.

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