Symbol in context

$R_{\mathrm{th},i}$

This entry links every published equation using this exact notation. Its meaning may change between equations.

Meanings in context

Article-grounded definition

the thermal resistance of one layer already between that tier and the heat sink — die bulk, bonding interface, or an intervening active tier.

\Delta T_j \;=\; P \sum_{i=1}^{N} R_{\mathrm{th},i},

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

R_{\mathrm{th},i}

the thermal resistance of one layer already between that tier and the heat sink — die bulk, bonding interface, or an intervening active tier.