Abstract:
Embodiments of the disclosure provide an image sensor device. The image sensor device includes a semiconductor substrate. The semiconductor substrate has a front surface, a back surface opposite to the front surface, a light-sensing region close to the front surface, and a trench adjacent to the light-sensing region. The image sensor device includes a reflective layer positioned on an inner wall of the trench, wherein the reflective layer has a light reflectivity ranging from about 70% to about 100%.
Abstract:
A backside illuminated image sensor device with a shielding layer and a manufacturing method thereof are provided. In the backside illuminated image senor device, a patterned conductive shielding layer is formed on a dielectric layer on a backside surface of a semiconductor substrate and surrounding a pixel array on a front side surface of the semiconductor substrate.
Abstract:
A method for forming an image sensor device is provided. The method includes forming a photodetector in a semiconductor substrate and forming a shielding layer over the semiconductor substrate. The method also includes forming a dielectric layer over the shielding layer and partially removing the dielectric layer to form a recess. The method further includes partially removing the shielding layer through the recess. In addition, the method includes forming a filter in the recess after the shielding layer is partially removed.
Abstract:
Embodiments of mechanisms for forming an image sensor device are provided. The image sensor device includes a semiconductor substrate and an isolation structure in the semiconductor substrate. The image sensor device also includes an active region in the semiconductor substrate and surrounded by the isolation structure. The active region includes a light sensing region and a doped region, and the doped region has a horizontal length and a vertical length. A ratio of the horizontal length to the vertical length is in a range from about 1 to about 4.
Abstract:
A backside illuminated CMOS image sensor and a manufacturing method thereof are provided. Embedded micro-lenses disposed respectively on concave surfaces of a buffer oxide layer, wherein the concave surfaces are positioned to respectively align with photodiodes of pixel array of the CMOS image sensor. The embedded micro-lenses can confine incident light to the photodiodes to reduce optical crosstalk between adjacent pixels.