WO2011040103A1 - 素子アレイ及び素子アレイ積層体 - Google Patents
素子アレイ及び素子アレイ積層体 Download PDFInfo
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- WO2011040103A1 WO2011040103A1 PCT/JP2010/061492 JP2010061492W WO2011040103A1 WO 2011040103 A1 WO2011040103 A1 WO 2011040103A1 JP 2010061492 W JP2010061492 W JP 2010061492W WO 2011040103 A1 WO2011040103 A1 WO 2011040103A1
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- Prior art keywords
- element array
- lens
- array
- support
- array according
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
- G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00278—Lenticular sheets
- B29D11/00298—Producing lens arrays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00278—Lenticular sheets
- B29D11/00307—Producing lens wafers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/22—Nonparticulate element embedded or inlaid in substrate and visible
Definitions
- the present invention relates to an element array and an element array laminate.
- Such an imaging unit generally includes a solid-state imaging device such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) image sensor, and a lens group that forms an image in a light receiving region of the solid-state imaging device.
- CCD Charge Coupled Device
- CMOS Complementary Metal-Oxide Semiconductor
- the alignment accuracy of the lens group is typically required to be on the order of ⁇ m.
- the alignment accuracy of the lens group depends on the pitch accuracy of the lenses in the lens array.
- a lens pitch error may occur due to the influence of variations in light intensity and temperature when the resin material is cured.
- the pitch error of the lens molding surface of the mold for molding the resin material and the deformation of the lens array when releasing the lens array also cause the lens pitch error. Since these error factors overlap, it is difficult for the technique disclosed in Patent Document 1 to suppress the lens pitch error to the ⁇ m order over the entire lens array.
- the present invention has been made in view of the above-described circumstances, and an object of the present invention is to reliably absorb the pitch error of the elements in the element array in the stacking process of the plurality of element arrays, and to align the element groups aligned in the stacking direction.
- An object of the present invention is to provide an element array that can be performed with high accuracy.
- the support body by forming the support body with a material that is more elastic than the material forming the element, it is possible to ensure sufficient flexibility in the support body to absorb the pitch error of the element.
- the pitch error of elements can be reliably absorbed in the step of laminating a plurality of element arrays, and an element array stacked body in which element groups arranged in the stacking direction are aligned with high accuracy can be obtained.
- FIG. 7A is a diagram illustrating a state before a plurality of element arrays constituting the element array stacked body of FIG. 6 are stacked, and FIG.
- FIG. 7B illustrates a stack of element arrays formed by stacking a plurality of element arrays. It is a figure which shows a state. It is a figure which expands and shows the part enclosed with the dotted line circle VIII in the element array laminated body of FIG. 7B. It is a figure which shows the modification of the element array of FIG. 1, and its laminated body. It is a figure which shows the other modification of the element array of FIG. 1, and its laminated body. It is a figure which shows the other modification of the element array of FIG. 1, and its laminated body. It is a figure which shows the other example of the element array laminated body for describing embodiment of this invention. It is a figure which shows the other example of the element array for describing embodiment of this invention.
- FIG. 15A and 15B are diagrams showing an example of a method for manufacturing the element array of FIG.
- FIG. 17A to 17D are diagrams showing an example of a method for manufacturing the element array of FIG.
- FIG. 19 is an enlarged view showing a portion surrounded by a dotted circle XIX in the element array stacked body of FIG. 18.
- FIG. 18 shows the 1 set of element group included in the element array laminated body of FIG. 18 in the cross section, and is a figure which shows the state from which the core of the several element which comprises an element group shifted
- FIGS. 1 and 2 show an example of an element array.
- the element array shown in FIGS. 1 and 2 is a lens array.
- the lens array 1 includes a plurality of lenses 2 and a support 3.
- Lenses 2 are arranged in a matrix in the illustrated example.
- the arrangement of the lenses 2 is not limited to a matrix shape, and may be a radial, concentric annular shape, other two-dimensional arrangement, or a one-dimensional arrangement.
- the lens 2 has predetermined optical surfaces 10a and 10b formed on the front and back sides thereof.
- each has a convex spherical surface, but various combinations of a convex spherical surface, a concave spherical surface, an aspherical surface, or a flat surface can be adopted depending on the application.
- the lens 2 has a flange portion 11.
- the flange portion 11 has a frame shape surrounding the outer periphery of the optical function portion 10 sandwiched between the optical surfaces 10 a and 10 b, and accommodates the optical function portion 10.
- the outer shape of the flange portion 11 in plan view is rectangular in the illustrated example, but may be circular, polygonal, or the like.
- the support 3 is formed so as to fill a gap between each lens 2 and the surrounding lens 2 and has a net shape (lattice shape) as a whole.
- the support bodies 3 are respectively joined to the peripheral surface of the flange portion 11 of the lens 2 and connect these lenses 2 to each other.
- the support 3 is made of a material that is more elastic (rich in elasticity) than the material that forms the lens 2 and is given flexibility. Therefore, the lens 2 can be displaced in the arrangement direction (row direction and column direction) thereof. Assuming that the width of the lens 2 is 1, the distance between two adjacent lenses 2, that is, the width of the support 3 disposed between the lenses 2 is typically 1 ⁇ 4 to 5.
- the material forming the support 3 preferably has a stretch ratio 4 to 5 times that of the material forming the lens 2.
- the lens 2 is formed of a translucent resin composition.
- an energy curable resin composition can be suitably used.
- the energy curable resin composition may be either a resin composition that is cured by heat or a resin composition that is cured by irradiation with active energy rays (for example, ultraviolet rays or electron beam irradiation).
- the resin composition forming the lens 2 preferably has an appropriate fluidity before curing from the viewpoint of moldability, such as mold shape transfer suitability. Specifically, it is preferably a liquid at room temperature and a viscosity of about 1000 to 50000 mPa ⁇ s.
- the resin composition forming the lens 2 has a heat resistance that does not cause thermal deformation even after the reflow process after curing.
- the glass transition temperature of the cured product is preferably 200 ° C. or higher, more preferably 250 ° C. or higher, and particularly preferably 300 ° C. or higher.
- a resin having a rigid ring structure for example, an alicyclic structure such as cyclohexane, nor
- the resin composition forming the lens 2 is preferably a resin composition having a small volume shrinkage due to the curing reaction from the viewpoint of shape transfer accuracy.
- the curing shrinkage rate of the resin composition is preferably 10% or less, more preferably 5% or less, and particularly preferably 3% or less.
- the resin composition having a low cure shrinkage include (1) resin compositions containing a high molecular weight curing agent (such as a prepolymer) (for example, JP-A Nos. 2001-19740, 2004-302293, and 2007-).
- a high molecular weight curing agent such as a prepolymer
- 211247 is preferably in the range of 200 to 100,000, more preferably in the range of 500 to 50,000, and particularly preferably 1,000 to 20
- the value calculated by the number average molecular weight of the curing agent / the number of curing reactive groups is preferably in the range of 50 to 10,000, and in the range of 100 to 5,000.
- Resins containing non-reactive substances organic / inorganic fine particles, non-reactive resins, etc.
- Compositions for example, described in JP-A-6-298883, JP-A-2001-247793, JP-A-2006-225434, etc.
- resin compositions containing low-shrinkage crosslinking reactive groups for example, ring-opening polymerization
- Sex groups for example, epoxy groups (for example, described in JP-A No. 2004-210932), oxetanyl groups (for example, described in JP-A No. 8-134405, etc.), episulfide groups (for example, JP-A No.
- a plurality of curing shrinkage reducing means in combination (for example, a resin composition containing a prepolymer containing a ring-opening polymerizable group and fine particles).
- the resin composition forming the lens 2 is preferably a mixture of two or more types of resins having different Abbe numbers.
- the resin on the high Abbe number side preferably has an Abbe number ( ⁇ d) of 50 or more, more preferably 55 or more, and particularly preferably 60 or more.
- the refractive index (nd) is preferably 1.52 or more, more preferably 1.55 or more, and particularly preferably 1.57 or more.
- Such a resin is preferably an aliphatic resin, particularly a resin having an alicyclic structure (for example, a resin having a cyclic structure such as cyclohexane, norbornane, adamantane, tricyclodecane, tetracyclododecane, specifically, for example, JP-A-10-152551, JP-A-2002-212500, JP-A-2003-20334, JP-A-2004-210932, JP-A-2006-199790, JP-A-2007-2144, JP-A-2007-284650. And the resins described in JP-A-2008-105999.
- a resin having an alicyclic structure for example, a resin having a cyclic structure such as cyclohexane, norbornane, adamantane, tricyclodecane, tetracyclododecane, specifically, for example, JP-A-10-152551, JP-A-2002-
- the resin on the low Abbe number side preferably has an Abbe number ( ⁇ d) of 30 or less, more preferably 25 or less, and particularly preferably 20 or less.
- the refractive index (nd) is preferably 1.60 or more, more preferably 1.63 or more, and particularly preferably 1.65 or more.
- Such a resin is preferably a resin having an aromatic structure.
- a resin having a structure such as 9,9′-diarylfluorene, naphthalene, benzothiazole, benzotriazole (specifically, for example, JP-A-60-38411). Publication No. 10-667977, No. 2002-47335, No. 2003-238842, No. 2004-83855, No. 2005-325331, No. 2007-238883, International Publication No. 2006/095610, the resin described in Japanese Patent No. 2537540, and the like) are preferable.
- the resin composition forming the lens 2 it is preferable to disperse inorganic fine particles in the matrix in order to increase the refractive index or adjust the Abbe number.
- the inorganic fine particles include oxide fine particles, sulfide fine particles, selenide fine particles, and telluride fine particles. More specifically, for example, fine particles of zirconium oxide, titanium oxide, zinc oxide, tin oxide, niobium oxide, cerium oxide, aluminum oxide, lanthanum oxide, yttrium oxide, zinc sulfide, and the like can be given.
- the inorganic fine particles may be used alone or in combination of two or more. Moreover, the composite by several components may be sufficient. In addition, for various purposes such as reducing photocatalytic activity and water absorption, the inorganic fine particles are doped with different metals, the surface layer is coated with different metal oxides such as silica and alumina, silane coupling agents and titanate cups.
- the surface may be modified with a ring agent, an organic acid (carboxylic acid, sulfonic acid, phosphoric acid, phosphonic acid, etc.) or a dispersant having an organic acid group.
- the number average particle size of the inorganic fine particles is usually about 1 nm to 1000 nm. However, if it is too small, the properties of the substance may change. If it is too large, the effect of Rayleigh scattering becomes remarkable, so 1 nm to 15 nm is preferable. It is more preferably 2 nm to 10 nm, and particularly preferably 3 nm to 7 nm. Further, it is desirable that the particle size distribution of the inorganic fine particles is narrow. There are various ways of defining such monodisperse particles.
- a numerical value range as described in JP-A-2006-160992 applies to a preferable particle size distribution range.
- the above-mentioned number average primary particle size can be measured by, for example, an X-ray diffraction (XRD) apparatus or a transmission electron microscope (TEM).
- the refractive index of the inorganic fine particles is preferably 1.90 to 3.00, more preferably 1.90 to 2.70, and more preferably 2.00 to 2.70 at 22 ° C. and a wavelength of 589 nm. It is particularly preferred that
- the content of the inorganic fine particles relative to the resin is preferably 5% by mass or more, more preferably 10 to 70% by mass, and particularly preferably 30 to 60% by mass from the viewpoint of transparency and high refractive index.
- a dispersant containing a functional group having reactivity with the resin monomer forming the matrix for example, described in Examples of JP-A-2007-238884
- hydrophobic Block copolymer composed of a functional segment and a hydrophilic segment for example, described in JP-A-2007-2111164
- having a functional group capable of forming an arbitrary chemical bond with inorganic fine particles at the polymer terminal or side chain It is desirable to disperse the fine particles by appropriately using a resin (for example, described in Japanese Patent Application Laid-Open Nos. 2007-238929 and 2007-238930).
- the resin composition forming the lens 2 is appropriately mixed with known release agents such as silicone-based, fluorine-based, and long-chain alkyl group-containing compounds and additives such as antioxidants such as hindered phenols. May be.
- the resin composition forming the lens 2 can be blended with a curing catalyst or an initiator as necessary.
- a curing catalyst or an initiator e.g., a compound that accelerates a curing reaction (radical polymerization or ionic polymerization) by the action of heat or active energy rays described in JP-A-2005-92099 (paragraph numbers [0063] to [0070]).
- the amount of these curing reaction accelerators to be added varies depending on the type of catalyst and initiator, or the difference in the curing reactive site, and cannot be specified unconditionally, but in general, the total solid content of the curing reactive resin composition
- the amount is preferably about 0.1 to 15% by weight, more preferably about 0.5 to 5% by weight based on the minute.
- the resin composition forming the lens 2 can be manufactured by appropriately blending the above components. At this time, if other components can be dissolved in the liquid low molecular weight monomer (reactive diluent), etc., it is not necessary to add a separate solvent, but if this is not the case, use a solvent.
- a curable resin composition can be produced by dissolving each component.
- the solvent that can be used in the curable resin composition is not particularly limited as long as the composition is uniformly dissolved or dispersed without precipitation, and specifically, for example, Ketones (eg, acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.), esters (eg, ethyl acetate, butyl acetate etc.), ethers (eg, tetrahydrofuran, 1,4-dioxane etc.) Alcohols (eg, methanol, ethanol) Isopropyl alcohol, butanol, ethylene glycol, etc.), aromatic hydrocarbons (eg, toluene, xylene, etc.), water and the like.
- the curable composition contains a solvent, it is preferable to perform a mold shape transfer operation after drying the solvent.
- the material for forming the support 3 is not particularly limited as long as the material is more elastic than the material for forming the lens 2 described above.
- a filler of a heat-resistant material such as silica or polyimide is kneaded with an olefin resin. Things can be used.
- FIGS. 3A to 3D show an example of a manufacturing method of the lens array 1 described above.
- a plurality of lenses 2 and a support 3 are integrally formed by two-color molding.
- the mold includes an upper mold 20 and a lower mold 30.
- a plurality of lens molding portions 22 are arranged in a matrix on the molding surface 21 of the upper mold 20 in the same arrangement as the arrangement of the lenses 2 in the lens array 1.
- the lens molding unit 22 molds the surface shape of the lens 2.
- a plurality of lens molding portions 32 are arranged in a matrix on the molding surface 31 of the lower mold 30 in the same arrangement as the arrangement of the lenses 2 in the lens array 1.
- the lens molding unit 32 molds the back surface shape of the lens 2.
- the materials of the molds 20 and 30 are appropriately selected according to the energy curable resin material forming the lens 2 and the support 3.
- a thermosetting resin for example, a metal material having excellent thermal conductivity or a material that transmits infrared rays is used as the mold material.
- an ultraviolet curable material for example, a material that transmits ultraviolet rays is used as the mold material
- an electron beam curable material is used as the resin material
- the material a material that transmits the electron beam is used.
- the resin material M1 forming the lens 2 is dropped onto the lens molding portion 32 of the lower mold 30 respectively.
- a resin material M ⁇ b> 2 that forms the support 3 is supplied onto the molding surface 31 of the lower mold 30 excluding the lens molding portion 32.
- the upper mold 20 is lowered, and the resin material M1, M2 is sandwiched between the molding surface 21 of the upper mold 20 and the molding surface 31 of the lower mold 30, and the resin material M1, M2 is deformed following the molding surfaces 21 and 31.
- the resin materials M1 and M2 are cured by applying energy to obtain the lens array 1.
- the lenses 2 are formed between the paired lens molding portions 22 and 32, respectively.
- the support 3 is formed between the molding surfaces 21 and 31 excluding the lens molding portions 22 and 32.
- the lens 2 and the support 3 are integrally formed in a state where they are joined to each other.
- both the lens 2 and the support 3 are formed by casting / compressing a resin material, but the present invention is not limited to this.
- the lens 2 may be formed by casting / compression
- the support 3 may be formed by injecting a resin material into the cavity in a state where the mold is closed by forming the lens 2.
- the lenses 2 can be produced individually, and these lenses 2 can be inserted to form the support 3 by casting, compression, or injection.
- it is preferably performed in a vacuum environment.
- FIG. 4 shows a modification of the lens array 1 described above.
- the support 3 is formed with holes 12 penetrating in the thickness direction.
- the number of the holes 12 is one, and the hole 12 is provided in the central portion of the support 3, but the number and position thereof are not limited.
- FIGS. 5A to 5D show an example of a manufacturing method of the lens array 1 shown in FIG.
- a plurality of lenses 2 and a support 3 are integrally formed by two-color molding.
- the mold includes an upper mold 20 and a lower mold 30.
- a convex portion 33 is provided at the center of the molding surface 31 of the lower mold 30.
- the convex portion 33 protrudes from the molding surface 31 with the same height as the thickness of the support 3 in the lens array 1.
- the convex portion 33 abuts on the molding surface 21 of the upper mold 20.
- the resin material M1 forming the lens 2 is dropped onto the lens molding portion 32 of the lower mold 30 respectively.
- a resin material M ⁇ b> 2 that forms the support 3 is supplied onto the molding surface 31 of the lower mold 30 excluding the lens molding portion 32.
- the upper mold 20 is lowered, and the resin material M1, M2 is sandwiched between the molding surface 21 of the upper mold 20 and the molding surface 31 of the lower mold 30, and the resin material M1, M2 is deformed following the molding surfaces 21 and 31.
- the lens array 1 energy is applied to the resin materials M1 and M2 and cured to obtain the lens array 1.
- the lenses 2 are formed between the paired lens molding portions 22 and 32, respectively.
- the support 3 is formed between the molding surfaces 21 and 31 excluding the lens molding parts 22 and 32 and the convex part 33.
- the lens 2 and the support 3 are integrally formed in a state where they are joined to each other.
- the hole 12 penetrated in the thickness direction is formed in the center part of the support body 3 by the convex part 33 of the lower mold 30.
- the projection 33 that contacts the molding surface 21 of the upper mold 20 is formed on the molding surface 31 of the lower mold 30. Is provided.
- ⁇ Stress may occur in the mold due to a load applied to the mold when the resin material is compressed.
- a wafer shape disk shape
- the mold for forming this typically has a relatively large molding surface area with respect to its thickness and is likely to be distorted. Then, due to the distortion of the mold, the distance between the molding surfaces varies and an error occurs in the lens thickness.
- the projection 33 is brought into contact with the molding surface 21 of the upper mold 20, and the distance between the molding surface 21 of the upper mold 20 and the molding surface 31 of the lower mold 30 around the projection 33 is uniquely determined.
- the accuracy of the thickness of the formed lens 2 can be increased, and the desired optical performance of the lens 2 can be obtained.
- FIG. 6 shows an example of the element array laminate.
- the element array laminate shown in FIG. 6 is a lens array laminate in which a plurality of lens arrays 1 in FIG. 1 are laminated.
- the lens array laminate 40 is configured by laminating two lens arrays 1a and 1b.
- the lens arrays 1a and 1b have the same configuration as the lens array 1 of FIG.
- a set of lens groups 41 is configured by the lenses 2a included in the lens array 1a and the lenses 2b included in the lens array 1b, which are arranged in the stacking direction of the lens arrays 1a and 1b.
- the lenses 2a and 2b constituting the lens group 41 are cemented with their optical axes aligned.
- the lenses 2a and 2b constituting the lens group 41 are joined by an adhesive 42 applied to one or both of the flange portions 11.
- FIG. 7A shows a state before the lens arrays 1a and 1b are stacked, and shows a case where the pitch of the lenses 2a in the lens array 1a is different from the pitch of the lenses 2b in the lens array 1b. Accordingly, the optical axes of the lenses 2a and 2b constituting the lens group 41 are also displaced.
- the adhesive 42 is sandwiched between the flange portions 11 of the lenses 2a and 2b constituting the lens group 41. While the support 3 included in the lens array 1a and the support 3 included in the lens array 1b are appropriately expanded and contracted due to the self-alignment effect caused by the surface tension of the adhesive 42, one lens 2a is compared with the other lens 2b. It is moved relatively in the pitch direction. Thereby, alignment of the lenses 2a and 2b is performed. In this state, the adhesive 42 is cured, and the lenses 2a and 2b are joined with their optical axes aligned.
- the self-alignment effect of the adhesive 42 is expressed by the edge (macro shape) of the joint surface of the flange portion 11.
- the wettability with the adhesive 42 on the bonding surface is patterned by adjusting the surface property (micro shape) of the bonding surface of the flange portion 11 or depositing a film on the bonding surface.
- the self-alignment effect of the adhesive 42 can also be expressed by performing the annealing.
- the adhesive 42 typically contracts as it is cured, and in some cases, the height dimension of the lens group 41 may vary depending on the thickness of the adhesive 42 after curing. Therefore, as shown in FIG. 8, microspheres 43 having a uniform particle diameter may be mixed in the adhesive 42. If the interval between the joining surfaces is determined by the diameter of the microsphere 43, the variation in the height dimension of the lens group 41 can be suppressed.
- FIG. 9 shows another modification of the lens array 1 of FIG. 1 and a laminate thereof.
- the flange portion 11 of the lens 2a included in the lens array 1a is provided with a fitting convex portion 13, and the flange portion 11 of the lens 2b included in the lens array 1b is provided on the flange portion 11 of the lens array 1b.
- a fitting recess 14 into which the fitting projection 13 is fitted is provided.
- the lenses 2a and 2b are aligned, and the lenses 2a and 2b are joined with their optical axes aligned.
- the positioning of the other lens 2b in the stacking direction with respect to the one lens 2a is simultaneously performed by bringing the fitting concave portion 14 into contact with the fitting convex portion 13. Therefore, variation in the height dimension of the lens group 41 can be suppressed.
- FIG. 10 shows another modification of the lens array 1 of FIG. 1 and a laminate thereof.
- the fitting surface of the fitting convex portion 13 provided on the flange portion 11 of the lens 2a included in the lens array 1a and the flange portion 11 of the lens 2b included in the lens array 1b are provided.
- the fitting surfaces of the fitting recesses 14 are tapered surfaces that are aligned with each other.
- the lenses 2a and 2b are aligned, and the lenses 2a and 2b are joined with their optical axes aligned.
- the positioning of the other lens 2b in the stacking direction with respect to the one lens 2a is simultaneously performed by bringing the fitting concave portion 14 into contact with the fitting convex portion 13. Therefore, variation in the height dimension of the lens group 41 can be suppressed.
- the fitting surface of the fitting convex part 13 and the fitting recessed part 14 is a taper surface, and both fitting is made smoothly.
- FIG. 11 shows another modification of the lens array 1 of FIG. 1 and a laminate thereof.
- the lens 2b included in the lens array 1b is elastically sandwiched between the flange portions 11 of the lenses 2a included in the lens array 1a along the arrangement direction of the lenses 2a in the lens array 1a.
- a clamping unit 15 is provided.
- the sandwiching portion 15 includes a pair of elastic pieces 16 facing in the row direction, which is the arrangement direction of the lenses 2a in the lens array 1a, and a pair of elastic pieces 16 facing in the column direction (FIG. Only a pair of elastic pieces 16 facing in the direction are shown).
- the support 3 included in the lens array 1b is appropriately formed with a hole through which the elastic piece 16 is inserted.
- the elastic piece 16 is made of a material having higher elasticity than the material forming the support 3 and is formed integrally with the lens 2a by, for example, insert molding.
- the support 3 included in the lens array 1a as the pair of elastic pieces 16 opposed in the row direction and the pair of elastic pieces 16 opposed in the column direction elastically sandwich the lens 2b in the row direction and the column direction,
- the support 3 included in the lens array 1b expands and contracts in the row direction and the column direction, respectively, to align the lenses 2a and 2b.
- the front end of the elastic piece 16 is engaged with the front edge of the flange 11 of the lens 2b, and the lenses 2a and 2b are locked with their optical axes aligned.
- Each of the above element array laminates is obtained by laminating a plurality of lens arrays 1 in FIG. 1 (lens array of the modified example), but the lens array 1 in FIG. 1 is laminated with other element arrays.
- An element array laminate can also be configured.
- FIG. 12 shows another example of the element array laminate.
- the element array laminate 50 is configured by sequentially laminating the lens array 1 and the lens array 53 of FIG.
- the sensor array 52 includes a wafer 60 formed of a semiconductor material such as silicon.
- a plurality of solid-state imaging elements 61 are formed on the wafer 60.
- the solid-state imaging device 61 is, for example, a CCD image sensor or a CMOS image sensor, and repeats a well-known film formation process, photolithography process, etching process, impurity addition process, etc. on the wafer 60, and a light receiving region on the wafer 60. Insulating film, electrode, wiring, etc. are formed.
- the lens array 53 includes a plurality of lenses 70 and a substrate portion 71 that connects these lenses 70 to each other.
- the plurality of lenses 70 and the substrate portion 71 are integrally formed of a translucent resin composition.
- the substrate portion 71 is formed in a wafer shape having the same size as the wafer 60 of the sensor array 52.
- the resin composition for forming the lens 70 and the substrate portion 71 for example, the same resin composition as that for forming the lens 2 of the lens array 1 is used. Accordingly, the substrate portion 71 has higher rigidity than the support 3 of the lens array 1, and the connection of the plurality of lenses 70 in the lens array 53 is not flexible.
- the arrangement of the plurality of solid-state imaging devices 61 in the sensor array 52 and the arrangement of the plurality of lenses 70 in the lens array 53 are all the same as the arrangement of the plurality of lenses 2 in the lens array 1.
- the lens 2 and the lens 70 arranged in the stacking direction constitute a set of lens groups 54, and the lens group 54 and the solid-state image sensor 61 constitute a set of imaging units 55.
- the lens array 1 and the lens array 53 are laminated to obtain the lens array laminate 51.
- the support 3 included in the lens array 1 is appropriately expanded and contracted, and the lens 2 and the lens 70 constituting the lens group 54 are aligned.
- the self-alignment of the adhesive 42 described above see FIGS. 7A and 7B
- the fitting convex part 13 and the fitting concave part 14 see FIGS. 9 and 10.
- the clamping part 15 (refer FIG. 11) can be used suitably.
- the lens array laminate 51 is laminated on the sensor array 52.
- the accuracy required for alignment between the lens group 54 and the solid-state imaging device 61 is relatively lower than the accuracy required for alignment between the lens 2 and the lens 70 constituting the lens group 54. Since the arrangement of the plurality of solid-state image sensors 61 in the sensor array 52 and the arrangement of the lens groups 54 in the lens array stack 51 are the same, a plurality of lenses can be obtained by stacking the lens array stack 51 on the sensor array 52.
- a set of imaging units 55 is configured in a lump.
- FIG. 13 shows another example of the element array.
- the element array shown in FIG. 13 is a lens array.
- description is abbreviate
- FIG. 13 shows another example of the element array.
- the element array shown in FIG. 13 is a lens array.
- description is abbreviate
- the lens array 101 includes a plurality of lenses 2 and a plurality of elastic pieces 103 as a support.
- Lenses 2 are arranged in a matrix.
- the elastic piece 103 is provided between the adjacent lenses 2.
- the two elastic pieces 103 are provided between the adjacent lenses 2, but may be one, or may be three or more.
- a gap between each lens 2 and the surrounding lens 2 is partitioned by a plurality of elastic pieces 103 provided in the gap, and a plurality of holes 12 are formed.
- the elastic piece 103 has its end joined to the opposing surfaces of the flanges 11 of the two lenses 2 sandwiching the elastic piece 103, and connects the two lenses 2 to each other.
- the elastic piece 103 is made of a material that is more elastic (rich in stretchability) than the material that forms the lens 2, and is given flexibility. Further, the elastic piece 103 is formed meandering with respect to a straight line connecting the joint portions of the flange portions 11 of the two lenses 2 to be connected, and this shape provides further flexibility. That is, the elastic piece 103 is deformed from a meandering shape to a straight shape, and from a straight shape to a meandering shape. They are displaced in their alignment direction (row direction and column direction).
- the lens array 101 can be manufactured in the same manner as the manufacturing method of the lens array 1 shown in FIGS. 5A to 5D.
- convex portions 33 are respectively provided at positions corresponding to the holes 12 on the molding surface 31 of the lower mold 30.
- the resin material forming the lens 2 and the resin material forming the elastic piece 103 are cast and compressed, respectively, and cured to obtain the lens array 101.
- the lenses 2 are formed between the paired lens molding portions 22 and 32, respectively.
- An elastic piece 103 is formed between the molding surfaces 21 and 31 excluding the lens molding parts 22 and 32 and the convex part 33.
- the lens 2 and the elastic piece 103 are integrally formed in a state of being bonded to each other.
- the convex portion 33 for forming the hole 12 is provided on the molding surface 31 of the lower mold 30. And by making this convex part 33 contact
- the self-alignment of the adhesive 42 described above is used as an alignment portion between the lens 2 included in the lens array 101 arranged in the stacking direction and the elements included in the other element array.
- the fitting convex part 13, the fitting recessed part 14 (refer FIG. 9 and FIG. 10), and the clamping part 15 (refer FIG. 11) can be used suitably.
- FIG. 14 shows another example of the element array.
- the element array shown in FIG. 14 is a lens array.
- description is abbreviate
- FIG. 14 shows another example of the element array.
- the element array shown in FIG. 14 is a lens array.
- description is abbreviate
- the lens array 201 includes a plurality of lenses 2 and a sheet material 203 as a support.
- Lenses 2 are arranged in a matrix.
- the lens 2 uses a releasable adhesive sheet 204, the flange portion 11 is bonded to one surface of the sheet material 203 so that the flange portion 11 can be peeled, and is connected to each other by the sheet material 203.
- a sheet that can be easily peeled off by heating or irradiation with ultraviolet rays is preferable.
- the sheet material 203 is made of a material that is more elastic (rich in stretchability) than the material that forms the lens 2 and is given flexibility. Therefore, the lens 2 can be displaced in the arrangement direction (row direction and column direction) thereof.
- 15A and 15B show an example of a manufacturing method of the lens array 201 of FIG.
- the lens array 201 shown in FIG. 6 is prepared as the lens array 201 described above, and the lenses 2 included in the lens array 101 are collectively bonded to the sheet material 203 via an adhesive sheet 204.
- the elastic pieces 103 of the lens array 101 are cut, and the lenses 2 are individually separated to obtain the lens array 201.
- the plurality of lenses 2 are flexibly connected by the sheet material 203. Therefore, in the above-described example, the lens array 101 illustrated in FIG. 6 is used. However, if the plurality of lenses 2 are similarly arranged and connected to each other, they are bonded to the sheet material 203. It does not matter whether or not the lenses 2 are connected to each other flexibly in the lens array.
- the sheet material 203 included in the lens array 201 is removed from the lens array 201 by peeling off the adhesive sheet 204 by heating or irradiation with ultraviolet rays.
- the self-alignment of the above-described adhesive 42 is used as an alignment portion between the lens 2 included in the lens array 201 arranged in the stacking direction and the elements included in the other element array.
- the fitting convex part 13, the fitting recessed part 14 (refer FIG. 9 and FIG. 10), and the clamping part 15 (refer FIG. 11) can be used suitably.
- the adhesive sheet 204 can be made elastic, and the elasticity of the adhesive sheet 204 can make the lens 2 displaceable in the direction in which they are arranged (row direction and column direction).
- the sheet material 203 may be a rigid substrate.
- FIG. 16 shows a modification of the lens array 201 of FIG.
- the sheet material 203 has a plurality of holes 214 arranged in the same arrangement as the lens 2.
- the hole 214 exposes the optical function unit 10 of the lens 2 bonded to the sheet material 203.
- the hole 214 is formed to have a size that exposes the entire optical surface 10a of the optical function unit 10, but is formed to have a size that overlaps the outer edge of the optical surface 10a, for example, to shield the sheet material 203 from light.
- the aperture can be formed of the sheet material 203 by forming the sheet material 203 or applying a light-shielding paint or the like to the surface of the sheet material 203.
- FIGS. 17A to 17D show an example of a manufacturing method of the lens array 201 of FIG.
- the sheet material 203 is inserted into a molding die, and a plurality of lenses 2 are joined to the sheet material 203.
- the sheet material 203 is attached to the molding surface 21 of the upper mold 20.
- the resin material M1 forming the lens 2 is dropped onto the lens molding portion 32 of the lower mold 30 respectively.
- the upper mold 20 is lowered, the resin material M1 is sandwiched between the molding surface 21 of the upper mold 20 and the molding surface 31 of the lower mold 30, and the resin material M1 is molded. Deform according to 21 and 31.
- the lens array 201 since the hole 214 for exposing the optical function unit 10 of the lens 2 is formed in the sheet material 203, the lens array 201 and other element arrays are removed without removing the sheet material 203 from the lens array 201. Can be stacked.
- FIG. 18 shows another example of an element array and a stacked body thereof.
- the element array shown in FIG. 18 is a microchemical chip array in which a plurality of microchemical chips for medical diagnosis are arranged, and the element array laminate shown in FIG. 18 is configured by laminating a plurality of microchemical chip arrays.
- a microchemical chip array laminate is configured by laminating a plurality of microchemical chip arrays.
- the microchemical chip array laminate 301 is configured by laminating two microchemical chip arrays 302a and 302b.
- the microchemical chip array 302a includes a plurality of microchemical chips 310a and a plurality of elastic pieces 311 as a support.
- the microchemical chip array 302b includes a plurality of microchemical chips 310b and a plurality of elastic pieces 311 as a support. Since the configuration of each part of the microchemical chip array 302a and the microchemical chip array 302b is basically the same, only one microchemical chip array 302a will be described below.
- the microchemical chips 310a are arranged in a matrix in the illustrated example. Note that the arrangement of the microchemical chips 310a is not limited to a matrix, and may be a radial, concentric ring, other two-dimensional arrangement, or a one-dimensional arrangement.
- the elastic pieces 311 are respectively provided between adjacent microchemical chips 310a.
- the elastic piece 311 has its ends joined to the opposing surfaces of the two microchemical chips 310a sandwiching the elastic piece 311 and connects the two microchemical chips 310a to each other.
- the elastic piece 311 is made of a material that is more elastic (rich in elasticity) than the material that forms the microchemical chip 310a, and is given flexibility. Therefore, the microchemical chip 310a can be displaced in the arrangement direction (row direction and column direction) thereof.
- FIG. 19 is an enlarged view of the microchemical chips 310a and 310b of FIG.
- the microchemical chips 310a and 310b are formed with fine flow paths 312 through which the sample liquid is circulated.
- the flow path 312 formed in each of the microchemical chips 310a and 310b communicates when the microchemical chips 310a and 310b are stacked.
- the channel 312 is typically formed with a width of several ⁇ m to several hundred ⁇ m.
- the accuracy required for alignment of the microchemical chips 310a and 310b is typically several ⁇ m or less.
- FIG. 20 shows a state in which the microchemical chips 310a and 310b of FIG. 18 are stacked with their cores shifted.
- a stepped portion 313 is formed at the connection location of the flow path 312 of the microchemical chips 310a and 310b.
- an air reservoir may be formed, and a sample liquid reservoir may be formed to increase the amount of sample liquid necessary for diagnosis.
- each of the microchemical chips 310a and 310b is flexibly connected by the elastic piece 311, one of the microchemical chips 310a is relatively relative to the other microchemical chip 310b in the pitch direction while appropriately expanding and contracting the elastic piece 311.
- the microchemical chips 310a and 301b can be aligned, and the above problem is solved.
- the self-alignment of the above-described adhesive 42 see FIGS. 7A and 7B
- the fitting convex part 13 and the fitting concave part 14 see FIGS. 9 and 10
- the clamping part 15 (refer FIG. 11) can be used suitably.
- the element array disclosed in the present specification is formed of a plurality of elements arranged one-dimensionally or two-dimensionally, and a material richer in elasticity than the material forming these elements. And a plurality of elements connected to each other via the support.
- the element array disclosed in the present specification is formed so that the support fills a gap between each element and the surrounding elements.
- At least one hole penetrating in the thickness direction is formed in the support.
- the support is a plurality of elastic pieces provided between adjacent elements, and each elastic piece is bonded to the two elements sandwiching the elastic pieces. Has been.
- the support is a sheet material, and each element is bonded to one surface of the sheet material.
- each element is bonded to the sheet material so as to be peelable.
- a plurality of holes for exposing the functional parts of the respective elements are formed in the sheet material.
- the element array disclosed in the present specification is an adhesive sheet in which the support is bonded to one surface of a substrate, and each element is bonded to the adhesive sheet in a peelable manner.
- each of the elements is included in another element array, and has a joint portion with another element stacked thereon, and the joint portion is connected to the another element.
- An aligning portion for aligning is provided.
- the alignment part is a fitting part that fits with the another element.
- the fitting surface of the fitting portion is a tapered surface.
- the alignment unit is a clamping unit that elastically clamps the another element along an arrangement direction of the plurality of elements.
- the element array disclosed in the present specification is a pattern in which the alignment portion is formed on the bonding surface of the bonding portion, and the pattern is bonded so as to exhibit the self-alignment effect of the adhesive. It controls the wettability to the agent.
- the element array stack disclosed in this specification includes a plurality of element arrays each including a plurality of elements arranged one-dimensionally or two-dimensionally, and element elements arranged in the stacking direction are aligned with each other.
- the present invention is useful when a plurality of structures formed by laminating a plurality of elements are collectively formed.
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
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Abstract
Description
それらの並び方向(行方向及び列方向)に変位する。
2 レンズ(素子)
3 支持体
10 光学機能部
11 フランジ部
12 孔
13 嵌合凸部
14 嵌合凹部
15 挟持部
16 弾性片
20 上型
21 成形面
22 レンズ成形部
30 下型
31 成形面
32 レンズ成形部
40 レンズアレイ積層体(素子アレイ積層体)
41 レンズ群
42 接着剤
43 微小球
50 素子アレイ積層体
51 レンズアレイ積層体
52 センサアレイ
53 レンズアレイ
54 レンズ群
55 撮像ユニット
60 ウエハ
61 固体撮像素子
70 レンズ
71 基板部
101 レンズアレイ
103 弾性片(支持体)
201 レンズアレイ
203 シート材(支持体)
204 粘着シート
214 孔
301 マイクロ化学チップアレイ積層体(素子アレイ積層体)
302a、302b マイクロ化学チップアレイ(素子アレイ)
310a、310b マイクロ化学チップ(素子)
311 弾性片(支持体)
312 流路
313 段差部
Claims (15)
- 1次元又は2次元に配列される複数の素子と、これらの素子を形成する材料よりも弾力性に富む材料で形成されたフレキシブルな支持体と、を備え、
前記複数の素子が、前記支持体を介して相互に連結された素子アレイ。 - 請求項1に記載の素子アレイであって、
前記支持体は、前記各素子とその周囲の素子との間の隙間を埋めるように形成されている素子アレイ。 - 請求項2に記載の素子アレイであって、
前記支持体には、厚み方向に貫通する少なくとも一つの孔が形成されている素子アレイ。 - 請求項1に記載の素子アレイであって、
前記支持体は、隣り合う素子の間にそれぞれ設けられた複数の弾性片であり、
前記各弾性片は、それを挟む二つの前記素子に接合された素子アレイ。 - 請求項1に記載の素子アレイであって、
前記支持体は、シート材であり、
前記各素子は、前記シート材の一方の表面に接合されている素子アレイ。 - 請求項5に記載の素子アレイであって、
前記各素子は、剥離可能に前記シート材に接合されている素子アレイ。 - 請求項5に記載の素子アレイであって、
前記シート材には、前記各素子の機能部を露呈させる孔が複数形成されている素子アレイ。 - 請求項1に記載の素子アレイであって、
前記支持体は、基板の一方の表面に接合された粘着シートであって、
前記各素子は、剥離可能に前記粘着シートに接合されている素子アレイ。 - 請求項1~8のいずれか一項に記載の素子アレイであって、
前記各素子は、他の素子アレイに含まれ、上に重ねられる別素子との接合部を有し、
前記接合部に、前記別素子との調芯をなす調芯部が設けられている素子アレイ。 - 請求項9に記載の素子アレイであって、
前記調芯部は、前記別素子と嵌合する嵌合部である素子アレイ。 - 請求項10に記載の素子アレイであって、
前記嵌合部の嵌合面がテーパ面である素子アレイ。 - 請求項9に記載の素子アレイであって、
前記調芯部は、前記複数の素子の配列方向に沿って前記別素子を弾性的に挟持する挟持部である素子アレイ。 - 請求項9に記載の素子アレイであって、
前記調芯部は、前記接合部の接合面に形成されたパターンであり、
前記パターンは、接着剤のセルフアライメント効果を発現させるように、接着剤に対する濡れ性を制御するものである素子アレイ。 - 1次元又は2次元に配列される複数の素子を備える素子アレイが複数積層され、積層方向に並ぶ素子群が相互に調芯された素子アレイ積層体であって、
前記複数の素子アレイの少なくとも一層が、請求項1~8のいずれか一項に記載の素子アレイである素子アレイ積層体。 - 1次元又は2次元に配列される複数の素子を備える素子アレイが複数積層され、積層方向に並ぶ素子群が相互に調芯された素子アレイ積層体であって、
前記複数の素子アレイの少なくとも一層が、請求項9に記載の素子アレイである素子アレイ積層体。
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EP10820223.5A EP2485070A4 (en) | 2009-09-30 | 2010-07-06 | Element array and element array laminated body |
CN201080043880.0A CN102770786B (zh) | 2009-09-30 | 2010-07-06 | 元件阵列和元件阵列层叠体 |
US13/499,458 US9523798B2 (en) | 2009-09-30 | 2010-07-06 | Element array and element array laminate |
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JP2009227249A JP5572355B2 (ja) | 2009-09-30 | 2009-09-30 | レンズアレイ及びレンズアレイ積層体 |
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EP (1) | EP2485070A4 (ja) |
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Also Published As
Publication number | Publication date |
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EP2485070A4 (en) | 2018-01-03 |
JP5572355B2 (ja) | 2014-08-13 |
EP2485070A1 (en) | 2012-08-08 |
KR20120091010A (ko) | 2012-08-17 |
KR101647539B1 (ko) | 2016-08-10 |
US9523798B2 (en) | 2016-12-20 |
CN102770786B (zh) | 2014-12-03 |
JP2011075835A (ja) | 2011-04-14 |
US20120189800A1 (en) | 2012-07-26 |
CN102770786A (zh) | 2012-11-07 |
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