Optical device and assembly for use with imaging dies, and wafer-label imager assembly
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United States of America Patent
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Mar 31, 2009
Grant Date -
Mar 2, 2006
app pub date -
Aug 22, 2005
filing date -
Aug 30, 2004
priority date (Note) -
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Abstract
Microelectronic imagers with integrated optical devices and methods for manufacturing imagers. The imagers, for example, typically have an imaging unit including a first substrate and an image sensor on and/or in the first substrate. An embodiment of an optical device includes a stand-off having a compartment configured to contain the image sensor. The stand-off has a coefficient of thermal expansion at least substantially the same as that of the first substrate. The optical device can further include an optics element in alignment with the compartment of the stand-off. The stand-off can be formed by etching a compartment into a silicon wafer or a wafer of another material having a coefficient of thermal expansion at least substantially the same as that of the substrate upon which the image sensor is formed. The optics elements can be formed integrally with the stand-offs or separately attached to a cover supported by the stand-offs.
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