A method of processing an image sensor system, comprising steps of placing a first cover member on top of an image sensor； coating the image sensor and the first cover member with a dark coating agent； removing the first cover member from the image sensor； placing a second cover member on top of the image sensor； affixing the image sensor on to a permanent mount to form an electrical coupling between the image sensor and the permanent mount； removing the second cover member from the image sensor； wherein the first cover member completely covers a top portion of the image sensor； and wherein the second cover member includes an internal rib configured to form a contact seal with the image sensor.
