公开(公告)号：US20210242264A1

公开(公告)日：2021-08-05

申请号：US16777060

申请日：2020-01-30

Applicant: OmniVision Technologies, Inc.

Inventor： Alireza BONAKDAR ,  Zhiqiang LIN ,  Lindsay GRANT

IPC: H01L27/146 ,  G02B5/20 ,  G02B3/00

Abstract: A light-trapping image sensor includes a pixel array and a lens array. The pixel array is formed in and on a semiconductor substrate and including photosensitive pixels each including a reflective material forming a cavity around a portion of semiconductor material to at least partly trap light that has entered the cavity. The cavity has a ceiling at a light-receiving surface of the semiconductor substrate, and the ceiling forms an aperture for receiving the light into the cavity. The lens array is disposed on the pixel array. Each lens of the lens array is aligned to the aperture of a respective cavity to focus the light into the cavity through the aperture.

公开(公告)号：US20210242259A1

公开(公告)日：2021-08-05

申请号：US16777027

申请日：2020-01-30

Applicant: OmniVision Technologies, Inc.

Inventor： Alireza BONAKDAR ,  Shinn-Jhy LIAN ,  Badrinath PADMANABHAN

IPC: H01L27/146

Abstract: A flare-blocking image sensor includes large pixels and small pixels, a microlens, and an opaque element. The large pixels and small pixels form a first and second pixel array respectively, each having a pixel pitch Px and Py. The second pixel array is offset from the first pixel array by ½Px and ½Py. A first large pixel of the large pixels is between and collinear with a first and a second small pixel separated by √{square root over (Px2+Py2 )} in a first direction and each having a width W less than both pixel pitch Px and Py. The microlens is aligned with the first large pixel. The opaque element is between the first large pixel and the microlens and extends, in the first direction, less than ½(√{square root over (Px2+Py2)}−W) from the first small pixel toward the second small pixel. The opaque element has a width perpendicular to the first direction not exceeding width W.

公开(公告)号：US20210327948A1

公开(公告)日：2021-10-21

申请号：US16853684

申请日：2020-04-20

Applicant: OmniVision Technologies, Inc.

Inventor： Chia-Ying LIU ,  Wu-Zang YANG ,  Chia-Jung LIU ,  Ming ZHANG ,  Yin QIAN ,  Alireza BONAKDAR

IPC: H01L27/146 ,  H01L31/14 ,  H01L31/0352 ,  H01L31/0216

Abstract: An image sensor with embedded wells for accommodating light emitters includes a semiconductor substrate including an array of doped sensing regions respectively corresponding to an array of photosensitive pixels of the image sensor. The semiconductor substrate forms an array of wells. Each well is aligned with a respective doped sensing region to facilitate detection, by the photosensitive pixel that includes said respective doped sensing region, of light emitted to the photosensitive pixel by a light emitter disposed in the well. The image sensor further includes, between adjacent doped sensing regions, a light-blocking barrier to reduce propagation of light to the doped sensing-region of each photosensitive pixel from wells not aligned therewith.

公开(公告)号：US20230043844A1

公开(公告)日：2023-02-09

申请号：US17963015

申请日：2022-10-10

Applicant: OmniVision Technologies, Inc.

Inventor： Alireza BONAKDAR ,  Shinn-Jhy LIAN ,  Badrinath PADMANABHAN

IPC: H01L27/146

Abstract: A flare-blocking image sensor includes large pixels and small pixels, a microlens, and an opaque element. The large pixels and small pixels form a first and second pixel array respectively, each having a pixel pitch Px and Py. The second pixel array is offset from the first pixel array by ½Px and ½Py. A first large pixel of the large pixels is between and collinear with a first and a second small pixel separated by √{square root over (Px2+Py2)} in a first direction and each having a width W less than both pixel pitch Px and Py. The microlens is aligned with the first large pixel. The opaque element is between the first large pixel and the microlens and extends, in the first direction, less than 1 2 ⁢ ( P x 2 + P y 2 - W ) from the first small pixel toward the second small pixel. The opaque element has a width perpendicular to the first direction not exceeding width W.

公开(公告)号：US20210242262A1

公开(公告)日：2021-08-05

申请号：US16777090

申请日：2020-01-30

Applicant: OmniVision Technologies, Inc.

Inventor： Alireza BONAKDAR ,  Zhiqiang LIN ,  Chen-Wei LU

IPC: H01L27/146 ,  G02B3/00

Abstract: A flare-suppressing image sensor includes a first pixel formed in a substrate and a refractive element located above the first pixel. The refractive element has, with respect to a top surface of the substrate, a height profile having at least two one-dimensional local maxima in each of a first cross-sectional plane and a second cross-sectional plane perpendicular to the first cross-sectional plane. Each of the first and second cross-sectional planes is perpendicular to the top surface and intersects the first pixel.

公开(公告)号：US20210242265A1

公开(公告)日：2021-08-05

申请号：US16777193

申请日：2020-01-30

Applicant: OmniVision Technologies, Inc.

Inventor： Alireza BONAKDAR ,  Zhiqiang LIN ,  Bill PHAN ,  Badrinath PADMANABHAN

IPC: H01L27/146

Abstract: An image sensor with quantum efficiency enhanced by inverted pyramids includes a semiconductor substrate and a plurality of microlenses. The semiconductor substrate includes an array of pixels. Each of the pixels is configured to convert light incident on the pixel to an electrical output signal, the semiconductor substrate having a top surface for receiving the light. The top surface forms a plurality of inverted pyramids in each pixel. The plurality of microlenses are disposed above the top surface and aligned to the plurality of inverted pyramids, respectively.

公开(公告)号：US20210091130A1

公开(公告)日：2021-03-25

申请号：US16576603

申请日：2019-09-19

Applicant: OmniVision Technologies, Inc.

Inventor： Alireza BONAKDAR ,  Zhiqiang LIN

IPC: H01L27/146

Abstract: An image sensor includes a two-dimensional photodiode-array formed in a semiconductor substrate, a first waveguide, and a first color filter. The first waveguide is aligned to a first photodiode of the photodiode-array, located above a top substrate surface of the semiconductor substrate. A first core of the first waveguide has a first core width that is less than a pitch of the photodiode-array in a first direction and a second direction corresponding to respective orthogonal dimensions of the photodiode-array. The first color filter is on a top waveguide surface of the first waveguide and has a first non-uniform thickness above the first core. The first waveguide is between the top substrate surface and the first color filter.