# US 2004/0105022 A1 · Solid-state image pickup device

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- Number: US 2004/0105022 A1
- Document ID: US20040105022A1
- Status: Published application
- Kind: A1
- Application number: 10/663,767
- Filed: 2003-09-17
- Published: 2004-06-03
- Earliest claimed: 2002-09-20
- Assignees: Canon Kabushiki Kaisha
- Inventors: Satoshi Hirayama; Yasuhiro Sekine
- Web page: https://patentgrep.com/patent/US20040105022A1

## CPC

- H10F 77/331: {for filtering or shielding light, e.g. multicolour filters for photodetectors}
- H10F 39/8053: {Colour filters}
- H10F 39/8057: {Optical shielding}
- H10F 39/806: {Optical elements or arrangements associated with the image sensors}
- H10F 77/413: {directly associated or integrated with the devices, e.g. back reflectors (directly associated or integrated with photovoltaic cells H10F77/42)}
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION

## Abstract

A solid-state image pickup device includes a photoelectric conversion portion for generating signal electric charges in accordance with an amount of incident light, a plurality of color filters, and a flattening layer formed on the plurality of color filters. A thickness of a projection or a recess on a surface of the flattening layer, provided on a region where color filters are adjacent to each other, is equal to or less than 0.2 μm.

## Claims

### Claim 1

A solid-state image pickup device comprising:
a photoelectric conversion portion for generating signal electric charges in accordance with an amount of incident light;
a plurality of color filters; and
a flattening layer formed on said plurality of color filters,
wherein a thickness of a projection or a recess on a surface of said flattening layer, provided on a region where color filters are adjacent to each other, is equal to or less than 0.2 μm.

### Claim 2 (depends on 1)

A solid-state image pickup device according to claim 1, wherein a thickness of said flattening layer is at least 1.0 μm.

### Claim 3 (depends on 1)

A solid-state image pickup device according to claim 1 wherein said plurality of color filters are formed according to divided exposure in which said solid-state image pickup device is divided into a plurality of exposure regions, and a desired pattern is formed by combining patterns of the divided exposure regions.

### Claim 4

A solid-state image pickup device comprising:
a photoelectric conversion portion for generating signal electric charges in accordance with an amount of incident light;
a plurality of color filters; and
a condenser lens, having a shape to cause the incident light to pass through a region of a color filter having a uniform spectral characteristic, for condensing the incident light onto said photoelectric conversion portion.

### Claim 5 (depends on 4)

A solid-state image pickup device according to claim 4, wherein said condenser lens has a shape to cause the incident light to pass through a region of a color filter having a uniform thickness.

### Claim 6 (depends on 4)

A solid-state image pickup device according to claim 4, wherein said condenser lens has a shape to cause an outermost optical path of the incident light to coincide with a surface of the color filter facing said condenser lens, at an inner position of 0.1 L-0.25 L from both edges of a pixel, where L represents a pixel diameter.

### Claim 7 (depends on 4)

A solid-state image pickup device according to claim 4, further comprising a wiring layer formed between said photoelectric conversion portion and said plurality of color filters, wherein said wiring layer includes a wiring disposed so as not to cross an outermost optical path of the incident light.

### Claim 8 (depends on 4)

A solid-state image pickup device according to claim 4, wherein said condenser lens has a function of a color filter.

### Claim 9 (depends on 4)

A solid-state image pickup device according to claim 4, wherein said plurality of color filters are formed according to divided exposure in which said solid-state image pickup device is divided into a plurality of exposure regions, and a desired pattern is formed by combining patterns of the divided exposure regions.