Patent ID: 8348503
Filing Date: 2013-01-08
Classification: C23C,H01L

Abstract:
1. A system for controlling a temperature gradient across a substrate, comprising: a substrate having a first surface and a second surface; a shadow mask having a pattern of apertures, the shadow mask being aligned with, and formed upon, the first surface of the substrate; a temperature sensing layer disposed over the second surface of the substrate, the temperature sensing layer including a plurality of temperature measuring elements disposed at a plurality of minute and contiguous locations relative to the second surface of the substrate for measuring the temperature across the entirety of the substrate in order to sense a temperature gradient across the substrate; a thermoelectric cooling layer comprising a plurality of small and individually controllable thermoelectric cooling modules distributed across the entirety of the thermoelectric cooling layer corresponding to the substrate; and a heatsink layer disposed over the thermoelectric cooling layer.