Patent ID: 6226890
Filing Date: 2001-05-08
Classification: F26B,H01L

Abstract:
A method of desiccating an environment surrounding a moisture-sensitive electronic device sealed within an enclosure, comprising:(a) selecting a desiccant comprised of solid particles having a particle size range 0.1 to 200 micrometers, the desiccant selected to provide an equilibrium minimum humidity level lower than a humidity level to which the device is sensitive within the sealed enclosure;(b) choosing a binder that maintains or enhances the moisture absorption rate of the desiccant for blending the selected desiccant therein, the binder being in liquid phase or dissolved in a liquid;(c) forming a castable blend including at least the desiccant particles and the binder, the blend having a preferred weight fraction of the desiccant particles in the blend in a range of 10% to 90%;(d) casting a measured amount of the blend onto a portion of an interior surface of an enclosure to form a desiccant layer thereover, the enclosure having a sealing flange;(e) solidifying the desiccant layer to a solid; and(f) sealing the electronic device with the enclosure along the sealing flange.