COVER FOR IMAGE SENSOR ASSEMBLY WITH LIGHT ABSORBING LAYER

摘要

PROBLEM TO BE SOLVED: To provide electronic image sensors with means for attenuating spurious reflected light.SOLUTION: An image sensor assembly includes an image sensor die attached adjacent to a cavity and a lower surface in a preformed package having substantially vertical surfaces extending from the lower surface to an upper surface of the package. The image sensor die includes a charge-coupled device or an active pixel sensor imager that provides the light receiving surface for capturing an image. A cover is placed over the upper surface of the package. The cover is a glass cover or an infrared cut filter. A light absorbing layer is applied to the cover and aligned with the image sensor die such that the light absorbing layer prevents light from falling on the substantially vertical surfaces of the preformed package without hindering the passage of light that falls on the light receiving surface of the image sensor die.