Image sensor having light guide members

Patent metadata

Field	Value
Publication number	US-9679948-B2
Application number	US-201514615500-A
Country	US
Kind code	B2
Filing date	Feb 6, 2015
Priority date	Aug 18, 2014
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

Image sensors include a color photo-sensing photoelectric conversion device, a first color filter and a second color filter disposed under the color photo-sensing photoelectric conversion device, a first photodiode and a second photodiode disposed under the first color filter and the second color filter, respectively, a first light guide member disposed between the first color filter and the first photodiode, and a second light guide member disposed between the second color filter and the second photodiode.

First claim

What is claimed is:

1. An image sensor, comprising:
a color photo-sensing photoelectric conversion device, the color photo-sensing photoelectric conversion device including a first electrode;
a first color filter and a second color filter under the color photo-sensing photoelectric conversion device;
a first photodiode and a second photodiode under the first color filter and the second color filter, respectively, the first photodiode and the second photodiode being in a silicon substrate;
a first light guide member between the first color filter and the first photodiode;
a second light guide member between the second color filter and the second photodiode; and
a connecting electrode configured to electrically contact the first electrode, and to block light, wherein
the first light guide member and the second light guide member are formed substantially of a transparent material having a refractive index of about 1.8 to about 2.3 for light having a wavelength of 530 nm, and the transparent material includes at least one selected from ITO (indium tin oxide), IZO (indium zinc oxide), a titanium oxide, a siloxane derivative, and a polyimide derivative.

2. The image sensor of claim 1 , further comprising:
a transmitting circuit portion under the silicon substrate.

3. The image sensor of claim 1 , further comprising:
an insulation member between the first color filter and the second color filter, between the first photodiode and the second photodiode, and around the first light guide member and the second light guide member; and
a circuit wire within the insulation member.

4. The image sensor of claim 1 , wherein a cross-section of the first and second light guide members narrows going from the color photo-sensing photoelectric conversion device toward the first color filter or the second color filter.

5. The image sensor of claim 1 , wherein
the color photo-sensing photoelectric conversion device converts green light,
the first color filter is a red light filter, and
the second color filter is a blue light filter.

6. The image sensor of claim 1 , further comprising:
a lens layer including a plurality of convex lenses on the color photo-sensing photoelectric conversion device, and at a position corresponding to the first color filter and the second color filter.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Kyu Sik
• Ryuichi Satoh
• Lee Gae Hwang

Classifications

• H01L27/14625

  Electricity · mapped topic

• H01L27/307 Primary

  Electricity · mapped topic

• H01L2251/306

  Electricity · mapped topic

• H01L27/14627

  Electricity · mapped topic

• H01L27/14645

  Electricity · mapped topic