公开(公告)号：US20230401889A1

公开(公告)日：2023-12-14

申请号：US17839000

申请日：2022-06-13

Applicant: OmniVision Technologies, Inc.

Inventor： Jau-Jan DENG ,  Yi-Wei LIU

IPC: G06V40/13 ,  H04M1/02 ,  G06F3/041 ,  G06F3/042

CPC classification number: G06V40/1318 ,  H04M1/0266 ,  G06F3/0412 ,  G06F3/042

Abstract: An image sensor for imaging fingerprints has multiple photodiode groups each with field of view through a microlens determined by optical characteristics of the microlens and locations of the microlens and openings of upper and lower mask layers. Many photodiode groups have fields of view outwardly splayed from a center-direct field of view. A diameter of openings of the upper mask layer distant from the group having a center-direct field of view is larger than openings of a photodiode group having a center-direct field of view. A method of matching illumination of a group of photodiodes with center-direct field of view to illumination of photodiode groups having outwardly splayed fields of view includes sizing openings in the upper mask layer of photodiode groups with outwardly splayed fields of view larger than openings in the upper mask layer associated with photodiode groups having center-direct field of view.

公开(公告)号：US20230386247A1

公开(公告)日：2023-11-30

申请号：US17824786

申请日：2022-05-25

Applicant: OmniVision Technologies, Inc.

Inventor： Jau-Jan DENG ,  Yi-Wei LIU

IPC: G06V40/13 ,  H01L27/146 ,  H01L27/32

CPC classification number: G06V40/1318 ,  H01L27/14627 ,  H01L27/14643 ,  H01L27/3227 ,  H01L27/323

Abstract: An image sensor for imaging fingerprints has multiple photodiode groups each having a field of view determined by pinholes of upper and lower mask layers and a metal layer, each field of view being through a microlens. Many photodiode groups have fields of view outwardly splayed from a group having a center-direct field of view. A diameter of pinholes of the metal layer distant from the group having a center-direct field of view have larger diameter than a pinhole of the photodiode group having a center-direct field of view. A method of matching illumination of a group of photodiodes with center-direct field of view to illumination of photodiode groups having outwardly splayed fields of view includes sizing a pinhole in the metal layer of photodiode groups with outwardly splayed fields of view larger than a pinhole associated with of photodiode groups having a center-direct field of view.