Patent ID: 11927616
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Environmental technology (Chemistry)
Classification: CPC G | IPC G

Claim 16:
17. A method for measuring alpha particle emissions, said method comprising:
measuring a wafer with a counter to obtain a wafer emission rate;
covering said wafer with a metal mesh grounded to a cathode of said counter wherein said metal mesh is grounded to a cathode outboard of said wafer;
measuring said metal mesh and said wafer with said counter to obtain a mesh and wafer emission rate;
replacing said wafer with a wafer carcass;
measuring said wafer carcass and said metal mesh with said counter to obtain a wafer carcass and mesh emission rate; and
calculating a wafer carcass emission rate based on said wafer emission rate, said mesh and wafer emission rate, and said wafer carcass and mesh emission rate; and
computing a controlled collapse chip connection emission rate.