KiCad Advanced: Design a smart USB thumb drive

Source: https://www.udemy.com/course/kicad-advanced-design-a-smart-usb-thumb-drive/

What you’ll learn

Route a 153-ball TFBGA eMMC chip using via-in-pad and dogbone escape techniques on a 0.5 mm ball pitch.
Control differential impedance for USB signal pairs and verify trace geometry using an impedance calculator.
Match eMMC data bus trace lengths to within ±3 mm using KiCad’s interactive length tuning tool and Net Inspector.
Design a dual ideal diode OR-ing power path using the LM66100 for seamless, efficient dual-port power management.
Create scoped KiCad DRC exceptions to document intentional design decisions without hiding genuine errors.
Produce a complete, DRC-clean 4-layer PCB layout within the physical constraints of a USB thumb drive form factor.

Requirements

Basic KiCad experience is required. You should be comfortable with schematic entry, footprint assignment, and simple PCB routing.
No prior experience with BGA components, high-speed interfaces, or multi-layer boards is needed; this course covers all of it.
A computer capable of running KiCad (Windows, macOS, or Linux). No hardware purchases required.
The free NextPCB DFM Tool is used for impedance calculations. A Windows machine or VM is helpful but not essential.