CN110058341A - A kind of color filer and CIS preparation method - Google Patents

A kind of color filer and CIS preparation method Download PDF

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Publication number
CN110058341A
CN110058341A CN201910329347.3A CN201910329347A CN110058341A CN 110058341 A CN110058341 A CN 110058341A CN 201910329347 A CN201910329347 A CN 201910329347A CN 110058341 A CN110058341 A CN 110058341A
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CN
China
Prior art keywords
substrate
color filer
refractive index
cis
light
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CN201910329347.3A
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Chinese (zh)
Inventor
杨鑫
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN201910329347.3A priority Critical patent/CN110058341A/en
Publication of CN110058341A publication Critical patent/CN110058341A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/20Filters
    • G02B5/201Filters in the form of arrays
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144Devices controlled by radiation
    • H01L27/146Imager structures
    • H01L27/14601Structural or functional details thereof
    • H01L27/1462Coatings
    • H01L27/14621Colour filter arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144Devices controlled by radiation
    • H01L27/146Imager structures
    • H01L27/14643Photodiode arrays; MOS imagers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144Devices controlled by radiation
    • H01L27/146Imager structures
    • H01L27/14683Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
    • H01L27/14685Process for coatings or optical elements

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Solid State Image Pick-Up Elements (AREA)

Abstract

It includes: the substrate for being etched at least one cavernous structure array that the embodiment of the present application, which provides a kind of color filer and CIS preparation method, the color filer,;Wherein, each cavernous structure array is using corresponding aperture through one of the corresponding three coloured light of RGB light.

Description

A kind of color filer and CIS preparation method
Technical field
This application involves field of image processing more particularly to a kind of color filer and CIS preparation methods.
Background technique
Colored filter (CF, Color Filter) is a kind of optical filter of apparent color, is complementary metal oxidation Primary clustering in object semiconductor image sensor (CIS, CMOS Image Sensor), it can accurately select to be intended to by Small range wave band light wave, and penetrate fall other be not intended to by wave band.Colored filter is typically mounted on the front of light source, makes Human eye can receive some color light of saturation.Currently, the more common preparation method of color filter film mainly has pigment point Four kinds of arching pushing, decoration method, print process and electrodeposition process etc..As using CF manufactured by pigment dispersion method have high-precision and compared with Good light resistance and heat resistance, becomes the main stream approach for preparing color filter film in the world.
The technical process of CF is the light shield layer that anti-transmission is made on transparent glass substrate, then sequentially production has translucency Then the colored light filter membrane layer of Red Green Blue is coated with one layer of smooth protective layer (Over Coat), most on filter layer ITO conductive film transparent on sputter afterwards.However, existing CF needs point three steps that R, tri- kinds of CF of G, B are processed, caused respectively The processing technology of CF is complicated, the thickness of CF is thicker.
Summary of the invention
The embodiment of the present application provides a kind of color filer and CIS preparation method, can reduce answering for CF processing technology The thickness of miscellaneous degree and CF.
The technical solution of the application is achieved in that
The embodiment of the present application provides a kind of color filer, and the color filer includes: that be etched at least one poroid The substrate of array of structures;Wherein, each cavernous structure array is using corresponding aperture through one in the corresponding three coloured light of RGB Kind light.
In above-mentioned color filer, the type of substrate include refractive index be greater than default refractive index dielectric material or Metallic film.
In above-mentioned color filer, the color filer further include: the light shield layer that covers on the substrate, in institute State the protective layer covered on light shield layer.
In above-mentioned color filer, when the type of substrate is the dielectric material that refractive index is greater than default refractive index, And the dielectric material it is non-conductive when, the color filer further include: the conductive film covered on the protective layer.
In above-mentioned color filer, the hole type of the cavernous structure is round or regular polygon.
In above-mentioned color filer, the size in the aperture by the refractive index of the substrate, the thickness of the substrate and The resonant wavelength of the corresponding three coloured light of RGB determines.
In above-mentioned color filer, the cavernous structure in three kinds of apertures of the corresponding three coloured light correspondence of RGB.
The embodiment of the present application provides a kind of cmos image sensor CIS preparation method, the side Method includes:
The deposition substrate on CIS circuit;
According to default aperture, at least one cavernous structure array, the size in the default aperture are etched on the substrate Three coloured light corresponding with RGB is corresponding.
In the above-mentioned methods, described on CIS circuit after deposition substrate, the method also includes:
Light shield layer is made on the substrate;
The coat protective layer on the light shield layer.
In the above-mentioned methods, the type of substrate includes the dielectric material or metal foil that refractive index is greater than default refractive index Film.
In the above-mentioned methods, when the type of substrate is when refractive index is greater than the dielectric material for presetting refractive index and described It is described on the light shield layer after coat protective layer when dielectric material is non-conductive, the method also includes:
The sputter conductive film on the protective layer.
It includes: to be etched with that the embodiment of the present application, which provides a kind of color filer and CIS preparation method, the color filer, The substrate of at least one cavernous structure array;Wherein, each cavernous structure array is corresponding through RGB using corresponding aperture One of three coloured light light.It is various sizes of by being arranged in pseudo-colour filtering on piece using above-mentioned color filer implementation Cavernous structure array, it is corresponding to penetrate the corresponding three coloured light of RGB, without making the colour of translucency Red Green Blue respectively Filter membranous layer thereby reduces the complexity of CF processing technology;Reduce colored light filter membrane layer, thereby reduces the thickness of CF.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of color filer provided by the embodiments of the present application;
Fig. 2 is a kind of top view of tetra- color lumps of RGGB of illustrative CF provided by the embodiments of the present application;
Fig. 3 is a kind of flow chart of CIS preparation method provided by the embodiments of the present application;
Fig. 4 is a kind of schematic diagram for illustratively preparing CIS provided by the embodiments of the present application;
Fig. 5 is a kind of section schematic diagram of illustrative CIS structure provided by the embodiments of the present application.
Specific embodiment
It should be appreciated that specific embodiment described herein is only used to explain the application.It is not used to limit the application.
Embodiment one
The embodiment of the present application provides a kind of color filer 1, as shown in Figure 1, the color filer 1 includes: to be etched with The substrate 10 of at least one cavernous structure array;Wherein, each cavernous structure array is corresponding through RGB using corresponding aperture One of three coloured light light.
A kind of color filer provided by the embodiments of the present application is suitable for making under the scene of CIS.
In the embodiment of the present application, the aperture of each cavernous structure array is identical, at least one poroid interface array includes Three kinds of aperture sizes, each middle aperture size correspond to one of the corresponding three coloured light of RGB light;When light source irradiates color filer When, different aperture size selections is through corresponding feux rouges, blue light or green light (the corresponding three coloured light of RGB).
Optionally, the type of substrate includes the dielectric material or metallic film that refractive index is greater than default refractive index.
In the embodiment of the present application, metallic film can be the noble metal films such as silicon thin film or gold, silver, specific basis Actual conditions are selected, and the embodiment of the present application does not do specific restriction.
Optionally, the color filer 1 further include: the light shield layer 11 that is covered on the substrate 10, in the shading The protective layer 12 covered on layer 11.
In the embodiment of the present application, light shield layer and protective layer are successively covered on substrate, are obtained color filer, are specifically covered The operation of lid light shield layer and protective layer and etch at least one cavernous structure array operation operation order according to the actual situation It is selected, the embodiment of the present application does not do specific restriction.
Optionally, when the type of substrate is the dielectric material that refractive index is greater than default refractive index, and the medium material When expecting non-conductive, the color filer further include: the conductive film 13 covered on the protective layer 12.
In the embodiment of the present application, when type of substrate is the dielectric material that refractive index is greater than default refractive index, and the medium When material is non-conductive, need to cover the conductive film of layer of transparent on the protection layer, the conductive film can for tin indium oxide (ITO, Indium Tin Oxides), ITO can cut off the electron radiation, ultraviolet light and far infrared being harmful to the human body.
Optionally, the hole type of the cavernous structure is round or regular polygon.
In the embodiment of the present application, regular polygon includes triangle, square, pentagon, hexagon etc., specifically according to reality Border situation is selected, and the embodiment of the present application does not do specific restriction.Preferably, the hole type of cavernous structure is circular light transmission Better effect.
Optionally, the size in the aperture passes through the refractive index of the substrate, the thickness of the substrate and RGB corresponding three The resonant wavelength of coloured light determines.
Optionally, the cavernous structure in the corresponding three kinds of apertures of the corresponding three coloured light of the RGB.
In the embodiment of the present application, for three coloured light corresponding for R, G, B, the corresponding diameter of the light of each color Array of circular apertures.By taking the color filer of 80nm thickness as an example, for feux rouges, aperture 100nm;For green light, aperture For 150nm;For blue light, aperture 200nm.
Illustratively, as shown in Fig. 2, processing array of circular apertures on the silicon thin film of 80nm thickness, the pseudo-colour filtering of each color Piece processes the array of circular apertures of different-diameter respectively, wherein the array of circular apertures in the upper left corner is realized to the selection transmission of feux rouges, the lower left corner Realize that selection transmission, the array of circular apertures in the lower right corner to green light realize that the selection to blue light penetrates with the array of circular apertures in the upper right corner.
It is understood that by the way that various sizes of cavernous structure array is arranged in pseudo-colour filtering on piece, it is corresponding to penetrate RGB Corresponding three coloured light thereby reduces CF's without making the colored light filter membrane layer of translucency Red Green Blue respectively Processing technology;Reduce colored light filter membrane layer, thereby reduces the thickness of CF.
Embodiment two
The embodiment of the present application provides a kind of cmos image sensor CIS preparation method, such as Fig. 3 institute Show, method includes:
S101, the deposition substrate on CIS circuit.
In the embodiment of the present application, type of substrate includes the dielectric material or metal foil that refractive index is greater than default refractive index Film.
In the embodiment of the present application, CIS preparation facilities processes the CIS circuit of building CIS on wafer, later, in CIS electricity Road deposits a laminar substrate of specified thickness.
Illustratively, substrate thickness 80nm can be specifically adjusted according to the actual situation, and the embodiment of the present application is not done It is specific to limit.
In the embodiment of the present application, type of substrate includes the dielectric material or metal foil that refractive index is greater than default refractive index Film.
In the embodiment of the present application, metallic film can be the noble metal films such as silicon thin film or gold, silver, specific basis Actual conditions are selected, and the embodiment of the present application does not do specific restriction.
S102, according to preset aperture, at least one cavernous structure array is etched on substrate, preset aperture size with The corresponding three coloured light of RGB is corresponding.
After CIS preparation facilities deposited substrate on CIS circuit, CIS preparation facilities is according to default aperture, in substrate Upper at least one cavernous structure array of etching.
Illustratively, CIS preparation facilities is according to required Bayer array color, using 1 red 2 green 1 it is blue put in order, Corresponding four cavernous structure arrays are etched on substrate.
Optionally, the hole type of cavernous structure is round or regular polygon, is specifically selected according to the actual situation, this Application embodiment does not do specific restriction.
In the embodiment of the present application, regular polygon includes triangle, square, pentagon, hexagon etc., specifically according to reality Border situation is selected, and the embodiment of the present application does not do specific restriction.Preferably, the hole type of cavernous structure is circular light transmission Better effect.
Optionally, the size in the aperture passes through the refractive index of the substrate, the thickness of the substrate and RGB corresponding three The resonant wavelength of coloured light determines.
In the embodiment of the present application, on CIS circuit after deposition substrate, CIS preparation facilities makes light shield layer on substrate; And the coat protective layer on light shield layer.
In the embodiment of the present application, when type of substrate is the dielectric material and dielectric material that refractive index is greater than default refractive index When non-conductive, CIS preparation facilities sputter conductive film ITO on the protection layer.
Illustratively, as shown in figure 4, CIS preparation facilities deposits the silicon thin film of 80nm thickness on CIS circuit, and it is thin in silicon The cavernous structure array of different pore size is etched on film.
Illustratively, as shown in figure 5, be CIS structure sectional drawing, wherein top layer be upper lens, successively downwards are as follows: CF, photodiode and metal line.
It is understood that by the way that various sizes of cavernous structure array is arranged in pseudo-colour filtering on piece, it is corresponding to penetrate RGB Corresponding three coloured light reduces CF processing work without making the colored light filter membrane layer of translucency Red Green Blue respectively The complexity of skill thereby reduces the complexity for preparing CIS;Reduce colored light filter membrane layer, reduces the thickness of CF, and then drop The low thickness of CIS.
Embodiment three
The embodiment of the present application provides a kind of storage medium, is stored thereon with computer program, above-mentioned computer-readable storage Media storage has one or more program, and said one or multiple programs can be executed by one or more processor, be answered For in CIS, which to realize the CIS preparation method as described in embodiment two.
Specifically, the corresponding program instruction of one of the present embodiment CIS preparation method read by an electronic equipment or It is performed, includes the following steps:
The deposition substrate on CIS circuit;
According to default aperture, at least one cavernous structure array, the size in the default aperture are etched on the substrate Three coloured light corresponding with RGB is corresponding.
In an embodiment of the present invention, further, on CIS circuit after deposition substrate, said one or multiple Program is executed by said one or multiple processors, is also performed the steps of
Light shield layer is made on the substrate;
The coat protective layer on the light shield layer.
In an embodiment of the present invention, further, type of substrate includes the medium material that refractive index is greater than default refractive index Material or metallic film.
In an embodiment of the present invention, further, when the type of substrate is Jie that refractive index is greater than default refractive index It is described on the light shield layer after coat protective layer when material and when the dielectric material is non-conductive, said one or Multiple programs are executed by said one or multiple processors, are also performed the steps of
The sputter conductive film on the protective layer.
The above, the only preferred embodiment of the application, are not intended to limit the protection scope of the application.

Claims (11)

1. a kind of color filer, which is characterized in that the color filer includes: to be etched at least one cavernous structure array Substrate;Wherein, each cavernous structure array is using corresponding aperture through one of the corresponding three coloured light of RGB light.
2. color filer according to claim 1, which is characterized in that the type of substrate includes refractive index greater than default The dielectric material or metallic film of refractive index.
3. color filer according to claim 1, which is characterized in that the color filer further include: in the base The light shield layer covered on plate, the protective layer covered on the light shield layer.
4. color filer according to claim 3, which is characterized in that when the type of substrate is refractive index greater than default When the dielectric material of refractive index, and when the dielectric material is non-conductive, the color filer further include: on the protective layer The conductive film of covering.
5. color filer according to claim 1, which is characterized in that the hole type of the cavernous structure is for circle or just Polygon.
6. color filer according to claim 1, which is characterized in that the size in the aperture by the substrate refraction The resonant wavelength of rate, the thickness of the substrate and the corresponding three coloured light of RGB determines.
7. color filer according to claim 1, which is characterized in that three kinds of holes of the corresponding three coloured light correspondence of RGB The cavernous structure of diameter.
8. a kind of cmos image sensor CIS preparation method, which is characterized in that the described method includes:
The deposition substrate on CIS circuit;
According to default aperture, at least one cavernous structure array, the size and RGB in the default aperture are etched on the substrate Corresponding three coloured light is corresponding.
9. CIS preparation method according to claim 8, which is characterized in that it is described on CIS circuit after deposition substrate, The method also includes:
Light shield layer is made on the substrate;
The coat protective layer on the light shield layer.
10. according to the described in any item CIS preparation methods of claim 8 or 9, which is characterized in that the type of substrate includes folding Penetrate dielectric material or metallic film that rate is greater than default refractive index.
11. CIS preparation method according to claim 10, which is characterized in that when the type of substrate is greater than for refractive index When the dielectric material of default refractive index and when the dielectric material is non-conductive, the coat protective layer on the light shield layer it Afterwards, the method also includes:
The sputter conductive film on the protective layer.
CN201910329347.3A 2019-04-23 2019-04-23 A kind of color filer and CIS preparation method Pending CN110058341A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110794499A (en) * 2019-10-31 2020-02-14 歌尔股份有限公司 Light filter

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