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Optical filter, solid state image-capturing device using same, and camera module using same

A technology of optical filters and compounds, which can be used in electric solid-state devices, instruments, optics, etc., and can solve problems such as reducing camera image quality.

Active Publication Date: 2014-06-11
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, because squarylium-based pigments generally have fluorescence in their molecular structure, they sometimes produce scattered light when light is absorbed, which sometimes degrades the image quality of the camera.

Method used

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  • Optical filter, solid state image-capturing device using same, and camera module using same
  • Optical filter, solid state image-capturing device using same, and camera module using same
  • Optical filter, solid state image-capturing device using same, and camera module using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0381] The present invention will be described more specifically according to the following examples, but the present invention is not limited by these examples. And "parts" means "parts by weight" unless otherwise specified. In addition, the measurement method of each physical property value and the evaluation method of a physical property are as follows.

[0382]

[0383] The molecular weight of the resin is measured by the method of the following (a) or (b) in consideration of the solubility of each resin in a solvent and the like.

[0384] (a) Gel Permeation Chromatography (GPC) device manufactured by Waters (WATERS) was used (Type 150C, column: H-type column manufactured by Tosoh, developing solvent: o-dichlorobenzene) , The weight average molecular weight (Mw) and the number average molecular weight (Mn) in terms of standard polystyrene were measured.

[0385] (b) Using a GPC device manufactured by Tosoh Corporation (HLC-8220 type, column: TSKgelα-M, developing solve...

Synthetic example

[0402] The squaraine-based compounds, phthalocyanine-based compounds, cyanine-based compounds, near-ultraviolet absorbers, and other pigments used in the following examples can be synthesized using generally known methods. For example, refer to Japanese Patent No. 3366697, Japanese Patent No. 2846091, Japanese Patent No. 2864475, Japanese Patent No. 3703869, Japanese Patent Laid-Open No. 60-228448, Japanese Patent Laid-Open No. 1-146846, and Japanese Patent Laid-Open No. 1-228960 Publication, Japanese Patent No. 4081149, Japanese Patent Laid-Open No. 63-124054, "Phthalocyanine-Chemistry and Function" (IPC, 1997), Japanese Patent Laid-Open No. 2007-169315, Japanese Patent Laid-Open 2009 -108267, Japanese Patent Laid-Open No. 2010-241873, Japanese Patent No. 3699464, Japanese Patent No. 4740631, etc., were synthesized.

Synthetic example 1

[0404] The 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.1 represented by the following formula (a) 2，5 .1 7，10 ] 100 parts of dodec-3-ene (hereinafter also referred to as "DNM"), 18 parts of 1-hexene (molecular weight modifier) ​​and 300 parts of toluene (solvent for ring-opening polymerization reaction), charged with nitrogen replacement In the reaction vessel, the solution was heated to 80°C. Next, in the solution in the reaction vessel, add 0.2 parts of a toluene solution (0.6mol / liter) of triethylaluminum as a polymerization catalyst, and 0.9 parts of a toluene solution (concentration of 0.025mol / liter) of methanol-modified tungsten hexachloride. The ring-opening polymerization reaction was carried out by heating and stirring the solution at 80° C. for 3 hours to obtain a ring-opening polymer solution. The polymerization conversion rate in this polymerization reaction was 97%.

[0405] [chem 32]

[0406]

[0407] 1,000 parts of the thus-obtained ring-opened polymer so...

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Abstract

The present invention addresses the problem of providing an optical filter having exceptional transmittance characteristics in which the drawbacks of conventional near-infrared-cutting filters and other optical filters are overcome, and light scattering is minimal even during light absorption. This optical filter is characterized by containing a squarylium compound and a compound for absorbing or quenching fluorescence. This optical filter preferably contains a near-infrared absorbing dye that contains a squarylium compound (A), and at least one compound (B) selected from the group consisting of a phthalocyanine compound (B-1), and a cyanine compound (B-2).

Description

technical field [0001] The invention relates to an optical filter and a device using the optical filter. Specifically, it relates to an optical filter containing a specific solvent-soluble pigment compound, and a solid-state imaging device and camera module using the optical filter. Background technique [0002] Charge Coupled Device (CCD) or Complementary Metal Oxide Semiconductor (CCD) or Complementary Metal Oxide Semiconductor (CCD) that uses color image solid-state imaging elements in solid-state imaging devices such as video cameras, digital still cameras, and mobile phones with camera functions. Semiconductor (CMOS) image sensors, these solid-state imaging elements use silicon photodiodes (silicon photodiodes) that are sensitive to near-infrared rays that cannot be sensed by human eyes in their light-receiving parts. In these solid-state imaging devices, it is necessary to adjust the sensitivity correction to a color tone that is natural to the human eye, and filters ...

Claims

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Application Information

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IPC IPC(8): G02B5/22H01L27/14
CPCC09B57/007G02B5/208G02B1/04G02B2207/113G03G5/0696G06F21/32H04M1/00G02B5/223C09B23/0066C09B67/0033C09B67/0034H04M1/0264C09K11/025C09K11/06C09B47/04H04N23/55C09B23/164C09K2211/1007
Inventor 长屋胜也岸田宽之坪内孝史中岛满三星兰田中幸恵
Owner JSR CORPORATIOON
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