This sounds strange but it's commonplace to make parts like this. Some DCDC converter modules have silicon dies embedded into their PCBs to save physical footpr

This sounds strange but it's commonplace to make parts like this. Some DCDC converter modules have silicon dies embedded into their PCBs to save physical footprint, most notably there's a family of Texas Instruments ones which use this technique. https://www.electronicdesign.com/sites/electronicdesign.com/files/uploads/2015/12/0716_TI_DC-DCmodules_F2.gif https://www.electronicdesign.com/sites/electronicdesign.com/...