Here’s some more information: Solder Mask Smaller than Pad
Here’s the current datasheet for TI CSD13383F4: https://www.ti.com/lit/ds/symlink/csd13383f4.pdf?ts=1657960373244&ref_url=https%3A%2F%2Fwww.ti.com%2Fpower-management%2Fmosfets%2Fn-channel-transistors%2Fproducts.html, and here’s their technical document for the FemtoFET packages: https://www.ti.com/lit/ug/slra003d/slra003d.pdf?ts=1657960694232.
See how the recommendation is to use SMD style instead of NSMD. And interestingly the paste stencil openings are offset from the land pattern. There would be much to analyze in this, and even more if you want to use this in manual assembly (yes, it’s possible! But I had to modify the footprint for that) or use cheap and not so advanced manufacturer.
Here’s the final footprint:
TI_MOSFET_F4YJC_0402_FEMTO.kicad_mod (2.7 KB)