One of the key challenges in rapid thermal processing is accurate measurement and control of the wafer temperature. Monitoring the ambient with a thermocouple is not feasible, in that the high temperature ramp rates prevent the wafer from coming to thermal equilibrium with the process chamber.
The premium tax credit is a government subsidy to help make health insurance premiums more affordable for middle and low-income people. The subsidy is only available to people with modified adjusted gross incomes from 100 to 400 percent of federal poverty level.
For purposes of the premium tax credit, eligibility for a certain year is based on the most recently published set of federal poverty guidelines on the first day of the annual open enrollment period. For example, the tax credit for 2015 is based on the 2014 FPL.