Method and apparatus for image sensor packaging
First Claim
Patent Images
1. A device comprising:
- a sensor die comprising;
a first substrate;
a sensor region in the first substrate;
a plurality of pixels disposed within the sensor region, each pixel of the plurality of pixels including a photodiode and a pixel control circuit formed in the first substrate; and
a plurality of sensor bond pads disposed on a first side of the first substrate and outside the sensor region, respective sensor bond pads receiving signal outputs from at least one respective pixel control circuit, at least one of the plurality of sensor bond pads being exposed at the first side of the first substrate, wherein the plurality of sensor bond pads comprises four bond pad groups, with each of the four bond pad groups extending along a respective side of the sensor region, wherein each of the four bond pad groups comprises first bond pads disposed along a first line and second bond pads disposed along a second line, wherein the first line is parallel to the second line and parallel to the respective side of the sensor region, wherein each of the first bond pads has a same offset with a respective one of the second bond pads, wherein no electrically conductive feature of the sensor die is disposed within a first area of the first side of the first substrate, the first area being directly over the sensor region; and
a control circuit die comprising;
a second substrate; and
a plurality of control circuit bond pads on a first side of the second substrate facing the first substrate, respective ones of the control circuit bond pads being bonded to respective ones of the plurality of sensor bond pads.
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Abstract
A backside illuminated image sensor having a photodiode and a first transistor in a sensor region and located in a first substrate, with the first transistor electrically coupled to the photodiode. The image sensor has logic circuits formed in a second substrate. The second substrate is stacked on the first substrate and the logic circuits are coupled to the first transistor through bonding pads, the bonding pads disposed outside of the sensor region.
35 Citations
20 Claims
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1. A device comprising:
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a sensor die comprising; a first substrate; a sensor region in the first substrate; a plurality of pixels disposed within the sensor region, each pixel of the plurality of pixels including a photodiode and a pixel control circuit formed in the first substrate; and a plurality of sensor bond pads disposed on a first side of the first substrate and outside the sensor region, respective sensor bond pads receiving signal outputs from at least one respective pixel control circuit, at least one of the plurality of sensor bond pads being exposed at the first side of the first substrate, wherein the plurality of sensor bond pads comprises four bond pad groups, with each of the four bond pad groups extending along a respective side of the sensor region, wherein each of the four bond pad groups comprises first bond pads disposed along a first line and second bond pads disposed along a second line, wherein the first line is parallel to the second line and parallel to the respective side of the sensor region, wherein each of the first bond pads has a same offset with a respective one of the second bond pads, wherein no electrically conductive feature of the sensor die is disposed within a first area of the first side of the first substrate, the first area being directly over the sensor region; and a control circuit die comprising; a second substrate; and a plurality of control circuit bond pads on a first side of the second substrate facing the first substrate, respective ones of the control circuit bond pads being bonded to respective ones of the plurality of sensor bond pads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device comprising:
an integrated circuit die including; a sensor region formed in a sensor substrate; a plurality of backside illuminated pixels disposed within the sensor region; a plurality of sensor bond pads disposed outside the sensor region and on a front side of the sensor substrate, wherein the sensor region has four sides, the plurality of sensor bond pads comprises four sensor bond pad groups, wherein each of the four sensor bond pad groups extends along a respective side of the sensor region, wherein a first sensor bond pad group of the four sensor bond pad groups extends along a first side of the sensor region, the first sensor bond pad group comprising a first plurality of sensor bond pads disposed along a first line and a second plurality of sensor bond pads disposed along a second line different from the first line, the first line and the second line being parallel to the first side of the sensor region, each of the first plurality of sensor bond pads having a same offset with a respective one of the second plurality of sensor bond pads; a row select line electrically connected to a plurality of pixels in a row, the row select line extending from within the sensor region to outside of the sensor region and being electrically connected to a first sensor bond pad; and an output line electrically connected to a plurality of pixels in a column, the output line extending from within the sensor region to outside of the sensor region and being electrically connected to a second sensor bond pad. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A device, comprising:
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a sensor die including; a sensor array within a sensor region; first bond pads on a topmost surface of the sensor die, the first bond pads being connected to respective outputs of respective pixels of the sensor array, the first bond pads further being configured in a pattern outside the sensor region, an area of the topmost surface of the sensor die directly over the sensor region being free of bond pads, wherein the first bond pads comprise four bond pad groups, wherein each of the four bond pad groups extends along a respective side of the sensor region and comprises; a first plurality of bond pads disposed along a first line parallel to the respective side of the sensor region; and a second plurality of bond pads disposed along a second line parallel to the first line, the second line being different from the first line, wherein each of the second plurality of bond pads has a same offset with a respective one of the first plurality of bond pads; and an electrical connection structure electrically connecting respective pixels within the sensor array to respective first bond pads; and a control circuit die mounted to the sensor die and including; a control circuit; second bond pads on a bottommost surface of the control circuit die, respective ones of the second bond pads being aligned with respective ones of the first bond pads; and a second electrical connection structure electrically connecting respective nodes of the control circuit to respective second bond pads. - View Dependent Claims (19, 20)
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Specification