Garage MOSFETs
https://hackaday.com/2018/11/19/of-roach-killer-and-rust-remover-sam-zeloofs-garage-made-chips/?fbclid=IwAR2eHjFw85gBlW3-MDGt8v1N9q_1KHf2zRqBDAiWn6z1hM-HSt33E8eHe-A#more-332722