METHOD OF STRESS RELIEF IN ANTI-REFLECTIVE COATED CAP WAFERS FOR WAFER LEVEL PACKAGED INFRARED FOCAL PLANE ARRAYS

摘要

Methods for reducing wafer bow induced by an anti -reflective coating of a cap wafer are provided. The method may utilize a shadow mask having at least one opening therein that is positioned opposite recessed regions in a cap wafer. The method may further include depositing at least one layer of an anti-reflective coating material through the shadow mask onto a planar side of a cap wafer to provide a discontinuous coating on the planar side.