Patent Publication Number: US-2011050988-A1

Title: Optical element module and manufacturing method thereof, electronic element module and manufacturing method thereof, and electronic information device

Description:
This nonprovisional application claims priority under 35 U.S.C. §119(a) to Patent Application No. 2009-199013 filed in Japan on Aug. 28, 2009, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to: an optical element module, such as a lens module and an optical function element module, in which one or a plurality of optical elements are housed within a light shielding holder, and a manufacturing method thereof; an electronic element module obtained by modularizing the optical element module and an electronic element, and a manufacturing method thereof; and an electronic information device, such as a digital camera (e.g., a digital video camera or a digital still camera), an image input camera (e.g., a monitoring camera), a scanner, a facsimile machine, a television telephone device and a camera-equipped cell phone device, including the electronic element module as an image input device used in an image capturing section thereof. 
     2. Description of the Related Art 
     In some conventional lens units used for a camera module or the like, concave and convex parts provided for adjacent lenses are engaged with each other to position a plurality of lenses in a lens tube. 
       FIG. 14  is a longitudinal cross sectional view of a conventional lens unit disclosed in Reference 1. 
     As illustrated in  FIG. 14 , a conventional lens unit  100  is manufactured as follows: an aperture opening  101   a  is placed upside down and a first lens  102  is first inserted into a lens tube  101 , which is a circular shape in plan view; and next, a second lens  103  is inserted into a concave part of the first lens  102 . A convex part slanting surface  102   a,  which is a circumference of the concave part of the first lens  102 , contacts with a concave part slanting surface  103   a,  which is a convex part side wall of the second lens  103 , to be positioned surface to surface. Thus, the positioning of the first lens  102  and the second lens  103  with each other enables to control the misalignment of the optical axis of the lenses, and the space between the lenses in an optical axis direction accurately. 
     Reference 1: Japanese Laid-Open Publication No. 2009-139693 
     SUMMARY OF THE INVENTION 
     In the conventional lens unit  100  described above, however, there may be a case as illustrated in  FIG. 15 . That is, if an adsorbing jig  104  for conveying the second lens  103  tilts during the insertion of the second lens  103  into the concave part of the first lens  102 , the convex part slanting surface  102   a  and the concave part slanting surface  103   a  will not contact each other on their slanting surfaces. This will result in the second lens  103  to be fixed tilting relative to the first lens  102 . As a result, the space between the lenses will not be stabilized and there will be misalignment or tilting from an optical axis C to an optical axis C 1  on an optical surface, which may cause problems such as the decrease or variation in the optical characteristics. 
     Moreover, since there is a space between the exterior wall of the first lens and the lens tube, there will be a positional misalignment between the center of the aperture opening  101   a  of the lens tube  101  and the optical axis C of the optical surface of the first lens  102 . 
     The present invention is intended to solve the conventional problems described above. The objective of the present invention is to provide: an optical element module, such as a lens unit, capable of preventing the misalignment and tilting of the lens optical axis C relative to the aperture opening of the lens tube and the center of the aperture opening to make the optical characteristics favorable, and a manufacturing method thereof; an electronic element module, such as a camera module, using the lens unit, and manufacturing method thereof; and an electronic information device, such as a camera-equipped cell phone device, including the electronic element module as an image input device used in an image capturing section. 
     An optical element module according to the present invention is provided, in which: one or a plurality of optical elements are housed within a light shielding holder; a slanting surface is provided on an outer circumference side of an optical surface of the optical element facing an aperture opening of the light shielding holder; a slanting surface is provided on an inner surface on a back side of the aperture opening of the light shielding holder in such a manner to face the slanting surface of the optical element; and the slanting surface of the optical element and the slanting surface of the light shielding holder are guided together, so that the aperture opening of the light shielding holder and the optical surface of the optical element are positioned, thereby achieving the objective described above. 
     Preferably, in an optical element module according to the present invention, a spacer section is provided on the outer circumference side of the optical surface of the optical element facing the aperture opening of the light shielding holder, with a slanting surface interposed from a planarized section; a planarized bottom surface is provided on an inner surface of a back side of the aperture opening of the light shielding holder, with an interposed slanting surface facing the slanting surface of the optical element; and the slanting surface of the optical element is guided by the slanting surface of the light shielding holder, so that the bottom surface contacts the spacer section of the optical element. 
     Still preferably, in an optical element module according to the present invention, a spacer section is provided on the outer circumference side of the optical surface of the optical element facing the aperture opening of the light shielding holder, with a slanting surface interposed from a planarized section; a planarized bottom surface is provided on an inner surface of a back side of the aperture opening of the light shielding holder, with an interposed slanting surface facing the slanting surface of the optical element; and the slanting surface of the optical element is guided by the slanting surface of the light shielding holder, so that the bottom surface contacts a planarized section on an outer circumference side of the optical surface. 
     Still preferably, in an optical element module according to the present invention, the slanting surface is an annular slanting surface. 
     Still preferably, in an optical element module according to the present invention, the annular slanting surface of the optical element forms a concave section, and the annular slanting surface of the light shielding holder forms a convex section. 
     Still preferably, in an optical element module according to the present invention, the annular slanting surface of the optical element forms a convex section, and the annular slanting surface of the light shielding holder forms a concave section. 
     Still preferably, in an optical element module according to the present invention, the annular slanting surface of the optical element and the annular slanting surface of the light shielding holder slant 30 to 80 degrees relative to the planarized surface. 
     Still preferably, in an optical element module according to the present invention, the annular slanting surface of the optical element and the annular slanting surface of the light shielding holder slant 45 to 60 degrees relative to the planarized surface. 
     Still preferably, in an optical element module according to the present invention, there is a gap of 30 μm to 100 μm between an inner surface of the light shielding holder and an outer surface of the one or plurality of optical elements, which are quadrilateral in plan view. 
     Still preferably, in an optical element module according to the present invention, a gap between the annular slanting surface of the optical element and the annular slanting surface of the light shielding holder is 20 μm at its maximum. 
     Still preferably, in an optical element module according to the present invention, an adhesive is arranged only in a space portion surrounded by bottom sections provided, with interposed taper sections, on a further outer circumference side of respective planarized surfaces of the spacer section on the outer circumference side of the optical surface on a back surface of an upper optical element, and a spacer section on the outer circumference side of the optical surface on a front surface of a lower optical element, so that the upper optical element and the lower optical element are adhered with each other. 
     Still preferably, in an optical element module according to the present invention: the adhesive is arranged only in the space portion surrounded by the bottom sections with the interposed taper sections; the adhesive is not arranged at least in a space portion surrounded by the upper and lower taper sections; and at least the space portion surrounded by the taper sections has enough space which prevents the adhesive from spreading to the spacer section by being pressed by the upper optical element and the lower optical element during adhesion. 
     Still preferably, in an optical element module according to the present invention, among the plurality of optical elements, a lens space between the upper optical element and the lower optical element is defined, together with an overall thickness, by direct contacting of the respective planarized surfaces of the spacer section of the upper optical element and the spacer section of the lower optical element. 
     Still preferably, in an optical element module according to the present invention, among the plurality of optical elements, a light shielding plate is interposed between at least the respective planarized surfaces of the spacer section of the upper optical element and the spacer section of the lower optical element. 
     Still preferably, in an optical element module according to the present invention, the light shielding plate includes an opening, which is provided at a position corresponding to the optical surface of the optical element, and includes a cut section, which is formed by cutting off part of an outer circumference edge thereof. 
     Still preferably, in an optical element module according to the present invention, the cut section is either provided at four sides of a quadrilateral in plan view excluding corner portions thereof, or formed at four corner portions thereof. 
     Still preferably, in an optical element module according to the present invention, the cut section at the four corner portions is either in a ¼ circular shape, or in an L shape along the corner portion. 
     Still preferably, in an optical element module according to the present invention, the optical surface, the slanting surface on the outer circumference side thereof, and the spacer section are simultaneously formed with a transparent resin material. 
     Still preferably, in an optical element module according to the present invention, the optical element is a lens. 
     Still preferably, in an optical element module according to the present invention, the optical element is an optical function element that directs output light straight to be output and refracting and guiding incident light in a predetermined direction. 
     A method for manufacturing an optical element module according to the present invention is provided for manufacturing the optical element module according to the present invention, the method including an assembling step, in which an optical element module is inserted into an open side of the light shielding holder, from the side close to the upper most optical element of the optical element module, and owing to a weight of the optical element module itself, a slanting surface of the uppermost optical element and a slanting surface on an inner side of an aperture opening of the light shielding holder are guided together, so that the aperture opening of the light shielding holder and the optical surface of the optical element are positioned, thereby achieving the objective described above. 
     Preferably, in a method for manufacturing an optical element module according to the present invention, the method further includes, prior to the assembling step: 
     a combing step for combing, by an adhesive, an upper lens wafer with a plurality of optical surfaces arranged thereon two dimensionally and a lower lens wafer with a plurality of optical surfaces arranged thereon two dimensionally, with a light shielding plate wafer interposed therebetween, in such a manner that optical axes of the upper and lower optical surfaces correspond to openings of the light shielding plate wafer, to manufacture an optical element wafer module; a UV light emitting step of emitting UV light onto the adhesive to cure the adhesive; and a cutting step of cutting the optical element wafer module simultaneously along dicing lines into individualized optical element modules. 
     An electronic element module according to the present invention is provided, in which an image capturing element chip module is fixed in a light shielding holder of the optical element module according to the present invention, the image capturing element chip module including a transparent support substrate adhered and fixed thereto to cover an electronic element facing the optical surface of the optical element, and the image capturing element chip module being adhered by positioning the electronic element relative to the optical surface, thereby achieving the objective described above. 
     A method for manufacturing an electronic element module according to the present invention is provided, the method including: an optical element module assembling step using the method for manufacturing an optical element module according to the present invention; and an electronic element chip module assembling step of fixing an electronic element chip module including a transparent support substrate adhered and fixed thereto for covering the electronic element, within the light shielding holder by positioning the electronic element facing the optical surface of the optical element, with the optical surface, thereby achieving the objective described above. 
     An electronic information device according to the present invention includes an electronic element module, as a sensor module, in an image capturing section thereof, the electronic element module including the optical element module according to the present invention provided therefor. 
     An electronic information device according to the present invention includes an electronic element module in an information recording and reproducing section thereof, the electronic element module including the optical element module according to the present invention provided therefor. 
     The functions of the present invention having the structures described above will be described hereinafter. 
     In the present invention, one or a plurality of optical elements are housed within a light shielding holder; 
     a slanting surface is provided on an outer circumference side of an optical surface of the optical element facing an aperture opening of the light shielding holder; a slanting surface is provided on an inner surface on a back side of the aperture opening of the light shielding holder in such a manner to face the slanting surface of the optical element; and the slanting surface of the optical element and the slanting surface of the light shielding holder are guided together, so that the aperture opening of the light shielding holder and the optical surface of the optical element are positioned. 
     As a result, the slanting surface of the first lens and the slanting surface inside the light shielding holder are guided together, so that the protruded slanting surface is engaged with the concaved slanting surface. This enables, for example, to position a lens module having a first lens and a second lens with high accuracy along an engaging section of a light shielding holder. As a result, it becomes possible to prevent the misalignment and tilting of the lens optical axis C relative to the aperture opening of the light shielding holder and the center of the aperture opening to make the optical characteristics favorable. 
     According to the present invention described above, the annular slanting surface of the first lens and the annular slanting surface of the light shielding holder are guided together, and the protruded annular slanting surface is engaged with the concaved annular slanting surface. Therefore, it becomes possible to position, for example, the lens module having the first lens and the second lens with high accuracy along the engaging section of the light shielding holder. As a result, it becomes possible to prevent the misalignment and tilting of the lens optical axis C relative to the aperture opening of the light shielding holder and the center of the aperture opening to make the optical characteristics favorable. 
     These and other advantages of the present invention will become apparent to those skilled in the art upon reading and understanding the following detailed description with reference to the accompanying figures. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic external view of an electronic element module according to Embodiment 1, where  FIG. 1(   a ) is a perspective view and  FIG. 1(   b ) is a top view of the electronic element module. 
         FIG. 2  is a longitudinal cross sectional view illustrating an exemplary detailed structure of the electronic element module according to Embodiment 1. 
         FIG. 3(   a ) is a plan view illustrating a front surface of the first lens in  FIG. 2 , and  FIG. 3(   b ) is a plan view illustrating a back surface of the first lens and front and back surfaces of a second lens in  FIG. 2 . 
         FIGS. 4(   a ) to  4 ( c ) are each an essential part longitudinal cross sectional view illustrating each manufacturing step for modularizing a first lens wafer and a second lens wafer to manufacture a lens wafer module. 
         FIG. 5  is a cross sectional view of each member, illustrating an image capturing element module assembling step for housing a lens module and an image capturing element chip module within a light shielding holder. 
         FIG. 6  is a plan view illustrating an example of a first lens wafer. 
         FIG. 7  is a plan view illustrating an example of a light shielding plate wafer, where  FIG. 7(   a ) is a view illustrating a case where a cut guiding hole is a rectangular hole, and  FIG. 7(   b ) is a view illustrating a case where a cut guiding hole includes a cross shape hole and an L shape hole. 
         FIG. 8  is a plan view illustrating an example of a second lens wafer, where  FIG. 8(   a ) illustrates a state where an adhesive is applied in accordance with a cut guiding hole of a light shielding plate wafer being a rectangular hole, and  FIG. 8(   b ) illustrates a state where the adhesive is applied in accordance with the cut guiding hole of a light shielding plate wafer being a cross shape hole and an L shape hole. 
         FIGS. 9(   a ) and  9 ( b ) are each a plan view illustrating a positional relationship between a cut guiding hole and a dicing line DL, for facilitating simultaneous cutting in a light shielding plate wafer in  FIG. 7 .  FIG. 9(   c ) is an enlarged view of a rectangular hole in  FIG. 9(   a ), and  FIG. 9(   d ) is an enlarged view of a cross shape hole in  FIG. 9(   b ). 
         FIG. 10  is a diagram for describing a case where a spacer of a first lens does not directly contact a spacer section of a second lens, and a case where a light shielding plate wafer is not interposed directly therebetween, where  FIG. 10(   a ) is an essential part cross sectional view of a front surface shape of the first lens,  FIG. 10(   b ) is an essential part cross sectional view of a back surface shape thereof in a case where the first lens is fixed by an adhesive on a glass plate,  FIG. 10(   c ) is an essential part cross sectional view of a joint surface of the first lens and the second lens,  FIGS. 10(   d ),  10 ( e ) and  10 ( g ) are each an essential part cross sectional view of a joint surface in a case where a light shielding plate is directly put between the first lens and the second lens, and  FIG. 10(   f ) is an essential part cross sectional view of a joint surface in a case where the light shielding plate is directly put between a glass plate and the first lens. 
         FIG. 11  is a diagram for describing a case where a light shielding plate cut from a light shielding plate wafer in  FIG. 7(   b ) is used and a case where it is not used, where  FIG. 11(   a ) is an essential part cross sectional view of a lens joint surface of a case where a light shielding plate is not used,  FIG. 11(   b ) is a plan view thereof,  FIG. 11(   c ) is an essential part cross sectional view of a lens joint surface of a case where the light shielding plate is used, and  FIG. 11(   d ) is a plan view thereof. 
         FIG. 12  is a longitudinal cross sectional view illustrating an exemplary detailed structure of an image capturing element module according to Embodiment 2. 
         FIG. 13  is a block diagram schematically illustrating an exemplary configuration of an electronic information device of Embodiment 3 of the present invention, using a solid-state image capturing apparatus including the sensor module according to Embodiment 1 or 2 of the present invention in an image capturing section. 
         FIG. 14  is a longitudinal cross sectional view of a conventional lens unit disclosed in Reference 1. 
         FIG. 15  is a longitudinal cross sectional view illustrating a case where a lens optical axis is tilted in a conventional lens unit in  FIG. 14  during assembly. 
     
    
    
       400 ,  500  image capturing element module 
       401  image capturing element chip (electronic element chip) 
       402 ,  502  light shielding holder 
       402 B,  406 B,  502 C,  506 B slanting surface 
       403  image capturing element 
       404  resin adhesive layer 
       405  transparent support substrate 
       406 ,  506  first lens 
       406 A,  506 A planarized surface 
       406 C,  406 D,  407 D,  506 C spacer section 
       406 E,  407 E,  502 D bottom surface section (bottom section) 
       407  second lens 
       408 ,  508  lens module 
       409  adhesive 
       409 A vent hole 
       410 ,  410 A to  410 C,  410 E light shielding plate 
       411   a  lens opening (through hole) 
       411   b  rectangular hole (rectangular shape hole) 
       411   c  cross shape hole 
       411   d  L shape hole 
       411   e  cut section 
       411 ,  411 A,  411 B light shielding plate wafer 
       412  image capturing element chip module 
       416  first lens wafer 
       417  second lens wafer 
       418  lens wafer module 
       420 ,  421  spacer section 
     A optical surface 
     B aperture opening 
     G contacting section 
     H adhesive section 
       90  electronic information device 
       91  solid-state image capturing apparatus 
       92  memory section 
       93  display section 
       94  communication section 
       95  image output section 
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, cases will be described in detail with reference to the accompanying figures as Embodiments 1 and 2, where an optical element module and a manufacturing method thereof, and an electronic element module using the optical element module and a manufacturing method thereof according to the present invention are applied to a lens module and a manufacturing method thereof and a sensor module using the lens module and a manufacturing method thereof. Further, an electronic information device, such as a camera-equipped cell phone device, including the sensor module as an image input device used in an image capturing section will be described in detail with reference to the accompanying figures as Embodiment 3. 
     Embodiment 1  
       FIG. 1  is a schematic external view of an electronic element module  400  according to Embodiment 1, where  FIG. 1(   a ) is a perspective view and  FIG. 1(   b ) is a top view of the electronic element module  400 . 
     As illustrated in  FIGS. 1(   a ) and  1 ( b ), the electronic element module  400  (sensor module  10 ) as the electronic element module according to Embodiment 1 includes: an optical element or an optical element module (not shown), such as one or a plurality of lenses, in which an optical surface A is provided at the center portion; and an image capturing element chip  401 . The optical element or optical element module and the image capturing element chip  401  are housed within a light shielding holder  402  such that an optical surface A corresponds and aligns with an aperture opening B. By the light shielding holder  402 , the top and side surfaces are covered, except the optical surface A, to shield the surface of the image capturing element from light. A plurality of the electronic element modules  400  are cut simultaneously from an image capturing element wafer module, and therefore, the external shape of each of the electronic element modules  400  is a quadrilateral in plan view as illustrated in  FIG. 1(   b ). 
       FIG. 2  is a longitudinal cross sectional view illustrating an exemplary detailed structure of the electronic element module  400  according to Embodiment 1. 
     As illustrated in  FIG. 2 , the electronic element module  400  according to Embodiment 1 includes: an image capturing element chip  401  as an electronic element, in which an image capturing element  403  is arranged at the center portion, the image capturing element  403  having a plurality of light receiving sections for capturing an image of a subject; a resin adhesive layer  404  arranged in the periphery of the image capturing element  403  on the image capturing element chip  401 ; a transparent support substrate  405 , such as a glass plate, covering the image capturing element  403  and being adhered on and fixed to the resin adhesive layer  404 ; and a lens module  408 , as an optical element module including a first lens  406  and a second lens  407 , provided above the transparent support substrate  405  in such a manner that the respective lens positions (position of respective optical surfaces A) correspond to and align with the image capturing element  403 . The electronic element module  400  further includes a light shielding holder  402 . The light shielding holder  402  arranges the image capturing element chip  401 , the resin adhesive layer  404  and the transparent support substrate  405  below a step section  402 A, and arranges the lens module  408  below a bottom surface section  402 B, to shield external light except for image capturing light.  FIG. 2  illustrates one unitary lens module  408  of a lens wafer module. As will be detailed later, the unitary lens module  408  is in fact made such that the lens wafer module is cut into a large number of individualized lens modules  408 . The lens module  408  is housed within the light shielding holder  402  and an individualized electronic element (i.e., an image capturing element chip module  412 , which will be described later with reference to  FIG. 5 ) is arranged on the step section  402 A within the light shielding holder  402 , to manufacture the electronic element module  400  (i.e., a sensor module  10 , which will be described with reference to  FIG. 13 ). 
     As illustrated in  FIG. 3(   a ), the front surface of the first lens  406  of the lens module  408  includes a planarized spacer section  406 C (a planarized section or a protruded section), which is annularly protruded to surround the optical surface A, with an outer circumference end portion, a planarized surface  406 A and a slanting surface  406 B interposed therebetween. In addition, as illustrated in  FIG. 3(   b ), the back surface of the first lens  406  is provided with a bottom section  406 E (or a bottom surface section) for arranging an adhesive thereon, on a further outer circumference side of a planarized spacer section  406 D (protruded section), which is annularly protruded surrounding the optical surface A of the center portion, with a step section (a slanting surface or a tapered surface) interposed therebetween. In this case together with the back surface shape of the first lens  406 , the front surface shape of the first lens  406 , such as the optical surface A, the slanting surface  406 B on the outer circumference side thereof, and the spacer section  406 C, are simultaneously formed with a transparent resin material. 
     As illustrated in  FIG. 3(   b ), both the front surface and the back surface of the second lens  407  are provided with a bottom section  407 E (or a bottom surface section) for arranging an adhesive thereon, on a further outer circumference side of a planarized spacer section  407 D (protruded section), which is annularly protruded surrounding an optical surface A of a center portion thereof, with a step section (a slanting section) interposed therebetween. 
     An adhesive  409  is arranged in a space portion surrounded by the bottom surface sections  406 E and  407 E, which are on the further outer circumference side of the respective planarized surfaces of the spacer section  406 D on the underside of the upper first lens  406  and the spacer section  407 D on the upper side of the lower second lens  407 . Thus, the first lens  406  and the second lens  407  are adhered with each other. In this case, a UV curing resin is used for the adhesive  409 . 
     The annular slanting surface  406 B of the first lens  406 , and the annular slanting surface  402 C inside an aperture opening B of the light shielding holder  402  are guided together, so that the upper spacer section  406 C and slanting surface  406 B of the first lens  406  are engaged with the slanting surface  402 C of the light shielding holder  402 . In order to facilitate to house the lens module  408  into the light shielding holder  402  during the assembly, there is a gap of 30 μm to 100 μm between the inner surface of the light shielding holder  402  and the external side surface of the lens module  408 . There is also a gap of 0 μm to 20 μm between the slanting surface  406 B of the first lens  406  and the slanting surface  402 C on the inner side of the light shielding holder  402 . The engaging angle θ of the slanting surface  406 B is approximately between 30 and 80 degrees, and preferably approximately between 45 to 60 degrees. Thus, the positional accuracy between the optical surface A of the first lens  406  and the aperture opening B of the light shielding holder  402  becomes as highly accurate as ±10 μm. 
     A light shielding plate  410  is interposed between the spacer section  406 D on the underside of the upper first lens  406  and the spacer section  407 D on the upper side of the lower second lens  407 . The light shielding plate  410  includes a through hole formed at the center portion to correspond to the optical surface. In addition, black dyed stainless steel (SUS), black PET or a PI substrate with black metal sputtered or deposited on its surface may be used for the light shielding plate  410 . The black dyed light shielding plate of stainless steel can be formed as thin as 100 μm or less in thickness, which reduces the variation in size in the thickness direction. For example, when a stainless steel light shielding plate with the thickness of 20 μm is used, the thickness variation will be approximately ±2 μm, which is a variation within an optically acceptable range. The light shielding plate  410  is directly put between the spacer section  406 D and the spacer section  407 D, and the light shielding plate  410  is also thin, which causes almost no variation in the thickness direction of the lens module  408  and causes little optical influence. 
     As described above and as illustrated in a circle contacting section G in  FIG. 2 , the lens space between the first lens  406  and the second lens  407  as well as the thickness of the lens module  408  are controlled by the contact of the respective planarized surfaces of the annular protruded portions of the spacer sections  406 D and  407 D. That is, the lens space is determined by the contacting surfaces (spacer sections  406 D and  407 D) of the first lens  406  and the second lens  407  and the thickness of the light shielding plate  410 . The adhesive  409  is arranged in the space portion (gap portion) surrounded by the bottom surface sections  406 E and  407 E, which are on the further outer side of the contacting surfaces, and the first lens  406  and the second lens  407  are adhered by the adhesive  409 . As a result, even if a large amount of the adhesive  409  is provided, the adhesive  409  will spread only within the gap, thereby no harmful influence is made depending on the variation of the thickness or amount of the adhesive  409 . As a result, the lens space is stabilized, and the optical characteristics of the lens module  408  are also stabilized. In this case as well, a later-described vent hole  409 A can be provided in the adhesive  409 , which is arranged in the periphery of the optical surface A, to prevent the adhesive  409  from being peeled off during the reflow. 
     As illustrated by an adhesive section H in the circle of  FIG. 2 , the light shielding plate  410 , which is a quadrilateral (or a disc) shape in plan view, includes a cut section  411   e,  which is formed by cutting off part of the outer circumference portion of the light shielding plate  410 . The cut section  411   e  does not reach as far as the outer circumference end of the first lens  406  or the second lens  407 , and creates a gap. The reason why the cut section  411   e  is provided is first to prevent the light shielding plate  410  from shielding UV light to the adhesive  409  so that a UV light curing resin can be used for the adhesive  409 , and second to reduce the area to be cut in the light shielding plate  410 . If a thermosetting resin is used for the adhesive  409 , there is a possibility of the lenses to be deformed due to the difference in the extension between the upper and lower lenses during the heat treatment. If a UV light curing resin is used for the adhesive  409 , the adhesive  409  can be cured by UV light at a low temperature, which provides the dimensional stability of the overall lens module  408 . 
     If a stainless steel plate material (SUS), for example, is used for the light shielding plate  410  and it is cut using a dicing blade or a wire, the edge of the blade becomes dull and the cutting surface becomes rough. Therefore, it is desirable to reduce the cutting area as much as possible. In order to reduce the area to be cut in the light shielding plate  410 , cut guiding holes are provided. For example, in order to facilitate the simultaneous cutting, a case where each cut guiding hole is a rectangular hole is illustrated in  FIG. 7(   a ), and a case where the cut guiding holes include a cross shape hole and an L shape hole is illustrated in  FIG. 7(   b ). 
     Hereinafter, a first lens wafer, a light shielding plate wafer and a second lens wafer will be described, and a dicing line DL will also be described using the light shielding plate wafer. 
       FIG. 6  is a plan view illustrating an example of a first lens wafer  416 . In  FIG. 6 , a plurality of optical surfaces A are arranged equally both lengthwise and widthwise in the first lens wafer  416 . In practice, a greater number of the optical surfaces A are arranged in a matrix. 
       FIG. 7  is a plan view illustrating an example of a light shielding plate wafer  411 , where  FIG. 7(   a ) is a view illustrating a case where the cut guiding hole is a rectangular hole, and  FIG. 7(   b ) is a view illustrating a case where the cut guiding hole include a cross shape hole and an L shape hole. In  FIGS. 7(   a ) and  7 ( b ), a plurality of lens openings  411   a  are arranged equally both lengthwise and widthwise. In practice, a greater number of the lens openings  411   a  are arranged in a matrix. The lens openings  411   a  are formed as many as the number of the optical surfaces A, corresponding to the position of the optical surfaces A in  FIG. 6 . In the periphery of the lens openings  411   a  and between the adjacent lens openings  411   a,  rectangular holes  411   b  in  FIG. 7(   a ) or cross shape holes  411   c  and L shape holes  411   d  in  FIG. 7(   b ) are formed, as cut guiding holes to facilitate the simultaneous cutting.  FIG. 9(   a ) and  FIG. 9(   b ) respectively correspond to  FIG. 7(   a ) and  FIG. 7(   b ). 
       FIG. 8  is a plan view illustrating an example of a second lens wafer  417 , where  FIG. 8(   a ) is a plan view of a second lens wafer  417 A, illustrating a state where the adhesive  409  is applied in accordance with the cut guiding holes of a light shielding plate wafer  411 A being a rectangular hole, and  FIG. 8(   b ) is a plan view of a second lens wafer  417 B, illustrating a state where the adhesive  409  is applied in a circular shape in accordance with the cut guiding holes of a light shielding plate wafer  411 B being a cross shape hole, a T shape hole and an L shape hole. 
       FIGS. 9(   a ) and  9 ( b ) respectively illustrate the positional relationship between the cut guiding holes for facilitating the simultaneous cutting and the dicing lines DL, in each light shielding plate wafer in  FIGS. 7(   a ) and  7 ( b ).  FIG. 9(   c ) is an enlarged view of a rectangular hole  411   b  in  FIG. 9(   a ).  FIG. 9(   d ) is an enlarged view of a cross shape hole  411   c  in  FIG. 9(   b ). 
     In  FIGS. 9(   a ) and  9 ( c ), when the light shielding plate wafer  411 A is laid on top of the second lens wafer  417 A, the position of the rectangular holes  411   b  corresponds to that of the adhesives  409 . The rectangular hole  411   b,  which is a cut guiding hole, is cut along the widthwise center line, or the dicing line DL, to be a cut section  411   e.  In  FIGS. 9(   b ) and  9 ( d ), when the light shielding plate wafer  411 B is laid on top of the second lens wafer  417 B, the position of the center portion of the cross shape hole  411   c,  for example, corresponds to that of the circular shape adhesive  409 . The cross shape hole  411   c,  which is a cut guiding hole, is cut along the widthwise center line, or the dicing line DL, to be an L shape cut section  411   e  along a corner portion. 
     Accordingly, the individualized light shielding plate  410  is provided with the lens opening  411   a  at the position corresponding to the respective optical surfaces A of the first lens  406  and the second lens  407 . The individualized light shielding plate  410  also includes the cut section  411   e,  which is obtained by cutting off part of the outer circumference edge of the light shielding plate  410 . The cut section  411   e  is either formed at the four sides of the quadrilateral in a plan view, excluding the corner portions, or formed at the four corner portions. The cut section  411   e  at the four corner portions is either in a ¼ circular shape, which is a remainder of the circular hole after being cut crosswise as previously described, or in an L shape along a corner portion, which is a remainder of the cross shape hole, T shape hole and L shape hole after being cut. 
     Next, a case will be described where the first lens wafer  416 , the light shielding plate wafer  411 , and the second lens wafer  417  are modularized to manufacture a lens wafer module  418  to be described later, with reference to  FIGS. 4(   a ) to  4 ( c ). 
       FIGS. 4(   a ) to  4 ( c ) are each an essential part longitudinal cross sectional view illustrating each manufacturing step in a case where the first lens wafer  416  and the second lens wafer  417  are modularized to manufacture the lens wafer module  418 . 
     First, in an adhesive applying step in  FIG. 4(   a ), the adhesive  409  is applied, through a nozzle of a dispenser, on the bottom section  407 E along dicing lines DL in a grid form, of the second lens wafer  417  (see  FIG. 9) , as illustrated in  FIGS. 8(   a ) and  8 ( b ). The second lens wafer  417  includes a plurality of second lenses  407  having the optical surfaces A arranged in a matrix therein. At this stage, as illustrated in  FIG. 8(   a ), the adhesive  409  may be arranged in a rectangular shape at the four peripheral sides excluding the four peripheral corners (vent hole  409 A) of the optical surface A. In this case, the four peripheral corner portions of the optical surface A become the vent holes  409 A. 
     As illustrated in  FIG. 8(   b ), the adhesive  409  may also be arranged in a quadrilateral or circular shape at only the four peripheral corners of the optical surface A. In this case, the four peripheral sides of the optical surface A become the vent holes  409 A. 
     In this embodiment, the adhesive  409  is applied on the bottom section  407 E between the second lenses  407  on the surface of the second lens wafer  417 ; however, without the limitation to this, the adhesive  409  may be applied on the bottom section  406 E between the first lenses  406  on the back surface of the first lens wafer  416 . Alternatively, the adhesive  409  may be applied on a predetermined position of the light shielding plate wafer  411 . The predetermined position of the light shielding plate wafer  411  is the position of the cut guiding hole corresponding to the bottom section  406 E and the bottom section  407 E. 
     Next, in a combining step in  FIG. 4(   b ), each optical axis of the optical surface A of each first lens  406  of the first lens wafer  416  is aligned to correspond with each optical axis of the optical surface A of each second lens  407  of the second lens wafer  417 . Further, each center of the lens opening  411   a  of the light shielding plate wafer  411  is aligned to correspond with each optical axis of the optical surface A. Subsequently, the upper first lens wafer  416  and the lower second lens wafer  417 , which are formed in a wafer scale, are combined with the adhesive  409  and the light shielding plate wafer  411  interposed therebetween to make them modularized. Thereafter, ultraviolet rays (UV) are emitted from above the wafer to cure the adhesive  409 . In this case, although the light shielding plate wafer  411  is adhered by the adhesive  409 , the light shielding plate wafer  411  need not be adhered by the adhesive  409 , being separated from the adhesive  409 , as will be described later in detail. 
     As described above, it is preferred to use a UV curing resin for the adhesive  409 . The reason is that if a thermosetting resin is used for the adhesive  409 , there will be a difference in the extension between the first lens wafer  416  and the second lens wafer  417  during the heat treatment and the positions of the upper and lower, first and second lenses  406  and  407  may be shifted from each other. It is noted that a resin which is cured by either of UV light or heat is effective as the adhesive  409 . In this case, the resin portion hidden by the light shielding plate wafer  411  can be cured by heat. Therefore, when the position of the upper and lower, first and second lenses  406  and  407  is fixed first by the UV resin curing and the subsequent heat treatment is performed, it will be difficult for the positions of the upper and lower, first and second lenses  406  and  407  to be shifted. 
     Subsequently, as illustrated in a cutting step in  FIG. 4(   c ), a cut retaining tape (not shown) is adhered on the front surface side of the plurality of first lenses  406  of the first lens wafer  416 , or on the back surface side of the plurality of second lenses  407  of the second lens wafer  417 , of a wafer scale. A cut protecting tape (not shown) may also be adhered on the opposite surface side of the cut retaining tape. Further, the lens wafer module  418  is simultaneously cut along the dicing lines DL indicated by the dotted lines to be individualized into the lens modules  408 . 
     A wafer-formed transparent support substrate (a substrate prior to being individualized into each transparent support substrate  405 ), such as a glass plate, is adhered and fixed by the resin adhesive layer  404  to cover the upper part of the image capturing element wafer  401 , and an image capturing element wafer unit is manufactured. The image capturing element wafer unit is simultaneously cut along the dicing lines DL to be individualized into image capturing element chip modules  412  in  FIG. 5 . 
     Further, as illustrated in an image capturing element module assembling step in  FIG. 5 , the light shielding holder  402  is placed upside down so that the opened portion is placed upward. The lens module  408  is inserted into the light shielding holder  402  with the side of the first lens  406  facing in to engage the annular slanting surface  406 B of the first lens  406  with the annular slanting surface  402 C of the light shielding holder  402 . Subsequently, owing to the weight of the lens module  408  itself, the annular slanting surface  406 B of the first lens  406  and the annular slanting surface  402 C on the inner side of the aperture opening B of the light shielding holder  402  are guided together, so that the spacer section  406 C on the upper side of the first lens  406  is engaged accurately with the bottom surface section  402 B of the light shielding holder  402 . Further, a side wall of the lens module  408  is fixed inside the light shielding holder  402  using an adhesive or the like. Subsequently, the transparent support substrate  405  side of the image capturing element chip module  412  is placed on the step section  402 A of the light shielding holder  402  and the side wall of the image capturing element chip module  412  is fixed to the light shielding holder  402  using an adhesive or the like. The adhesive fixes the side wall and the light shielding holder  402  so that the distance and horizontality are accurate between the lens module  408  and the image capturing elements. As a result, the image capturing element module  400  can be manufactured. 
     As described above, the manufacturing method of the image capturing element module  400  includes: a lens module assembling step and an image capturing element chip module assembling step. In the lens module assembling step, the lens module  408  is inserted from the upper first lens  406  side into the opening side of the light shielding holder  402 , and owing to its weight, the annular slanting surface  406 B of the upper most first lens  406  is guided to the annular slanting surface  402 C on the inner side of the aperture opening B of the light shielding holder  402  to position the aperture opening B of the light shielding holder  402  and the optical surface A of the first lens  406 . In the image capturing element chip module assembling step, the image capturing element chip module  412 , in which the transparent support substrate  405  is adhered and fixed to cover the upper part of the image capturing element  403 , is fixed inside the light shielding holder  402  by positioning the image capturing element  403  and the optical surface A. Thus, the lens or lens module  408  and the image capturing element chip module  412  are positioned and fixed inside the light shielding holder  402  to obtain the image capturing element module  400 . 
     As described above, the lens module  408  is inserted half way through into the light shielding holder  402 , which functions as a light shielding cover. Thereafter, the lens module  408  is dropped to be positioned accurately at the engaging section (annular slanting surfaces  402 C and  406 B) along the slanting surface. Thereafter, the image capturing element chip module  412  is mounted inside the light shielding holder  402 . 
     Although a parts conveying device with positioning accuracy of approximately 10 μm is extremely expensive, a parts conveying device with positioning accuracy of approximately 30 μm is relatively inexpensive. Therefore, the following is possible: up to the positioning with positioning accuracy of approximately 30 μm, the lens module  408  is brought to the light shielding holder  402  to be inserted, and thereafter, the lens module  408  is dropped so that the lens module  408  can be positioned accurately along the engaging section (annular slanting surfaces  402 C and  406 B) of the light shielding holder  402 . 
       FIG. 10  is a diagram for describing a case where the light shielding plate wafer  411 A in  FIG. 9(   a ) is used and a case where it is not used, where  FIG. 10(   a ) is an essential part cross sectional view of a front surface shape of the first lens  406 ,  FIG. 10(   b ) is an essential part cross sectional view of a back surface shape thereof in a case where the first lens  406  is fixed by the adhesive  409  on a planarized section without a bottom section,  FIG. 10(   c ) is an essential part cross sectional view of a joint surface of the first lens  406  and the second lens  407 ,  FIGS. 10(   d ),  10 ( e ) and  10 ( g ) are each an essential part cross sectional view of a joint surface in a case where the light shielding plate  410  is directly put between the first lens  406  and the second lens  407 , and  FIG. 10(   f ) is an essential part cross sectional view of a joint surface in a case where the light shielding plate  410  is directly put between the first lens  406  and a planarized section without a bottom section. 
       FIGS. 10(   b ) and  10 ( c ) illustrate a case where the light shielding plate  410  is not used. In  FIG. 10(   b ), the spacer section  406 D of the first lens  406  is directly contacting the planarized section without a bottom section to stabilize the lens space, and the adhesive  409  is arranged in a space portion of the bottom surface section  406 E on the outer circumference side of the spacer section  406 D. In this case, the combination of the planarized section without a bottom section and the first lens  406  includes, for example, a combination of the second lens  407  without a bottom section and the first lens  406  with a bottom section; and a combination of a transparent support body, such as a glass plate, and the first lens  406  with a bottom section, and the like. 
     In  FIG. 10(   c ), the spacer section  406 D of the first lens  406  is directly contacting the spacer section  407 D of the second lens  407  to stabilize the lens space, and the adhesive  409  is arranged in a space portion between the bottom surface sections  406 E and  407 E on the outer circumference side of the spacer sections  406 D and  407 D. 
     In addition,  FIGS. 10(   d ) to  10 ( g ) illustrate a case where the light shielding plate  410  is used.  FIG. 10(   d ) illustrates a case where a light shielding plate  410 A extending up to the cutting position is used.  FIG. 10(   e ) illustrates a case where a light shielding plate  410 B being shorter than the light shielding plate  410 A and is positioned inside the adhesive  409  (where a cut guiding hole is included). 
       FIGS. 10(   f ) and  10 ( g ) respectively illustrate cases where light shielding plates  410 C and  410 E, which are separated from the adhesive  409 , are used. 
     The advantages and disadvantages of the cases illustrated in  FIGS. 10(   d ) to  10 ( g ) will be described hereinafter. 
     In  FIG. 10(   d ), the outer circumference section of the light shielding plate  410 A is extended precisely up to the cutting outer circumference, which is excellent in the light shielding effect. With regard to the cutting of the light shielding plate  410 A, it is not favorable because the cutting area increases. Furthermore, since the different materials, that is, the lens and the light shielding plate  410 A, are adhered with each other by the adhesive  409 , there is a possibility of the adhesive  409  peeling off at the interface between the light shielding plate  410 A or the lens bottom section during heat treatment of reflow, for example. In  FIG. 10(   e ), although the light shielding effect slightly decreases since there is a gap (cut section  411   e ) with the light shielding plate  410 B compared to the light shielding plate  410 A in  FIG. 10(   d ), the cutting area is decreased, which improves the cutting effect. It becomes difficult for the adhesive  409  to be peeled off since there is a portion where the adhesion is made between the lenses and the adhesive  409  through the gap (cut section  411   e ). 
     In  FIGS. 10(   f ) and  10 ( g ), although the light shielding effect is further decreased compared to the light shielding plate  410 B in  FIG. 10(   e ) since there is a large gap (cut section  411   e ), the cutting effect is equal and the peeling resistance effect is further improved since there are more portions where the adhesion is made only by the lenses and the adhesive  409 . 
     An example of a case where the spacer section  406 D of the first lens  406  does not directly contact the spacer section  407 D of the second lens  407 , and a vent hole  409 A is provided during the reflow to prevent the resin from being peeled off, will be described with reference to  FIGS. 11(   a ) to  11 ( d ). 
       FIG. 11  is a diagram for describing a case where the spacer section of the first lens does not directly contact the spacer section of the second lens, where  FIG. 11(   a ) is an essential part cross sectional view of a lens joint surface of a case where a light shielding plate  410 F is not used,  FIG. 11(   b ) is a plan view thereof,  FIG. 11(   c ) is an essential part cross sectional view of a lens joint surface of a case where the light shielding plate  410 F is used, and  FIG. 11(   d ) is a plan view thereof. 
     As illustrated in  FIGS. 11(   a ) to  11 ( d ), the adhesive  409  is arranged in a space portion surrounded by a planarized section on a further outer circumference side of a planarized surface of a spacer section  420  of the upper optical element, and a planarized section continuing on a further outer circumference side of a planarized surface of a spacer section  421  of the lower optical element. In this case, the respective planarized surfaces of the spacer section  420  of the upper optical element do not directly contact the spacer section  421  of the lower optical element. 
     In addition, as illustrated in  FIGS. 11(   c ) and  11 ( d ), of the plurality of optical elements, the light shielding plate  410 F is interposed between the respective planarized surfaces of the spacer section  420  of the upper optical element and the spacer section  421  of the lower optical element. However,, the light shielding plate  410 F does not contact either of the spacer section  420  or  421 . Instead, the light shielding plate  410 F connects with the spacer sections  420  and  421  with the adhesive  409  interposed therebetween. In this case, the adhesive  409  is arranged at the position of the cut guiding hole to adhere the light shielding plate  410 F and the upper and lower lenses; however, the adhesive  409  is not limited to be arranged at the position of the cut guiding hole of the light shielding plate  410 F. The adhesive  409  may also be arranged between the light shielding plate  410 F and the upper lens and between the light shielding plate  410 F and the lower lens. 
     According to Embodiment 1 as described above, the spacer section  406 C is provided from the planarized section  406 A with the slanting surface  406 B interposed therebetween, on the outer circumference side of the optical surface A of the first lens  406  facing the aperture opening B of the light shielding holder  402 ; on the inner surface of the back side of the aperture opening of the light shielding holder  402 , the planarized bottom surface  402 B is provided with the slanting surface  402 C interposed, facing the slanting surface  406 B of the first lens  406 ; and the slanting surface  406 B of the first lens  406  is guided by the slanting surface  402 C of the light shielding holder  402 , so that the spacer section  406 C is engaged with the bottom surface  402 B. As described above, the annular slanting surface  406 B of the first lens  406  and the annular slanting surface  402 C on the inner side of the light shielding holder  402  are guided together, so that the protruded annular slanting surface is engaged with the concave annular slanting surface. As a result, the lens module  408  is moved along the engaging section of the light shielding holder  402  so as to position the aperture opening B of the light shielding holder  402  and the optical surface A of the first lens  406  with high accuracy. Thereby, it becomes possible to prevent the misalignment or tilting of the lens optical axis C of the optical surface A relative to the aperture opening B of the light shielding holder  402  and the center of the aperture opening B, and make the optical characteristics favorable. 
     In addition, according to Embodiment 1, the upper first lens  406  and the lower second lens  407  are housed within the light shielding holder  402 ; the light shielding plate  410  is interposed between at least the respective planarized surfaces of the spacer section  406 D of the upper first lens  406  and the spacer section  407 D of the lower second lens  407 ; and the light shielding plate  410  includes the opening  411   a  at the position corresponding to the optical surface A of the optical element, and includes the cut section  411   e,  which is formed by cutting off part of the outer circumference portion of the light shielding plate  410 . As described above, the light shielding plate  410  is made thin, so that the misalignment between the lenses can be further controlled to make the optical characteristics favorable. In addition, the cut section  411   e  is included, which is formed by cutting off part of the outer circumference portion of the light shielding plate  410 , so that the cutting area is reduced and the simultaneous cutting can be better performed. 
     In addition, since the outer circumference section of the light shielding plate  410  does not reach the outer circumference ends of the first lens  406  and the second lens  407  and a gap is made by the cut section  411   e,  the light shielding plate  410  does not shield the UV light to the adhesive  409 . As a result, it becomes possible to prevent the lenses from being deformed due to the difference in the extension between the upper and lower lenses during the conventional heat treatment. This provides dimensional stability to the overall lens module  408 . 
     Embodiment 2  
     In Embodiment 1 above, described is the case where the annular slanting surface of the optical element forms a concave section and the annular slanting surface of the light shielding holder forms a convex section, that is to say, the case where the concave annular slanting surface  406 B of the first lens  406  and the convex annular slanting surface  402 C protruded toward the inside of the aperture opening B of the light shielding holder  402  are guided together, so that the lens module  408  and the light shielding holder  402  are positioned with high accuracy. In Embodiment 2, a case will be described where the annular slanting surface of the optical element forms a convex section, and the annular slanting surface of the light shielding holder forms a concave section, that is to say, a case where the first lens side includes a convex annular slanting surface, and the light shielding holder side includes a concave annular slanting surface, which is concaved on the inner side of the aperture opening. 
       FIG. 12  is a longitudinal cross sectional view illustrating an exemplary detailed structure of an image capturing element module  500  according to Embodiment 2. It is noted that the same reference numerals are provided for those structural members which have the same functional effects as those in  FIG. 2 . 
     As illustrated in  FIG. 12 , the image capturing element module  500  according to Embodiment 2 includes: an image capturing element chip  401 , as an electronic element, the image capturing element chip  401  including an image capturing element  403  arranged on the center portion thereof, and the image capturing element chip  401  including a plurality of light receiving sections for capturing an image of a subject; a resin adhesive layer  404  arranged in the periphery of the image capturing element  403  on the image capturing element chip  401 ; a transparent support substrate  405 , such as a glass plate, covering the upper part of the image capturing element  403  and being adhered and fixed on the resin adhesive layer  404 ; and a lens module  508 , as an optical element module, having a first lens  506  and a second lens  407  provided such that respective lens positions (position of respective optical surfaces A) correspond and align with the image capturing element  403 . The image capturing element module  500  according to Embodiment 2 further includes a light shielding holder  502 . The light shielding holder  502  arranges the image capturing element chip  401 , resin adhesive layer  404  and transparent support substrate  405  on a step section  502 A, and also arranges a lens module  508  on a bottom surface section  502 B to shield outside light except for image capturing light.  FIG. 12  illustrates a lens module  508  which is a single unit of a lens wafer module. In practice, this single unit lens module  508  is individualized by cutting the lens wafer module into a large number of lens modules  508 . The lens module  508  is housed within the light shielding holder  502 , and an individual piece of an electronic element (image capturing element unit  412  illustrated in  FIG. 5 ) is arranged on a step section  502 A in the light shielding holder  502  to manufacture the image capturing element module  500  (sensor module  10 A, which will be later described with reference to  FIG. 13 ). 
     In summary, different members herein are the light shielding holder  502  and the first lens  506 . The first lens  506  includes a convex annular slanting surface  506 B where an optical surface A and a planarized section  506 A therearound are protruded. The light shielding holder  502  includes a concave annular slanting surface  502 C which is concaved on the inner side of an aperture opening B. The slanting surface  506 B, which is an annular convex part of the first lens  506 , and the slanting surface  502 C, which is an annular concave part on the inner side of the aperture opening B of the light shielding holder  502 , are guided together, so that the slanting surface  506 B, which is a protruded annular convex part, engages or contacts the slanting surface  502 C, which is a concaved, annular concave part. 
     There is a gap of 30 μm to 100 μm between the inner surface of the light shielding holder  502  and the external side surface of the lens module  508  to facilitate the housing of the lens module  508  into the light shielding holder  502  during assembly. There is also a gap of 0 μm to 20 μm between the slanting surface  506 B of the first lens  506  and the slanting surface  502 C on the inner side of the light shielding holder  502 . The engaging angle θ of the slanting surface  506 B is approximately between 30 and 80 degrees, and preferably approximately between 45 to 60 degrees. Thus, the positional accuracy between the optical surface A of the first lens  506  and the aperture opening B of the light shielding holder  502  becomes as highly accurate as ±10 μm. 
     An adhesive  409  is arranged in the space portion surrounded by bottom surface sections  506 E and  507 E, which are on the further outer side of respective planarized surfaces of a spacer section  506 D on the lower side of the upper first lens  506 , and a spacer section  407 D on the upper side of the lower second lens  407 . As a result, the first lens  506  and the second lens  407  are combined with each other. 
     According to Embodiment 2 as described above, the spacer section  506 C is provided from the planarized section  506 A with the slanting surface  506 B interposed therebetween, on the outer circumference side of the optical surface A of the first lens  506  facing the aperture opening B of the light shielding holder  502 ; on the inner surface of the back side of the aperture opening B of the light shielding holder  502 , a planarized bottom surface  502 D is provided with a slanting surface  402 C interposed, facing the slanting surface  506 B of the first lens  506 ; and the slanting surface  506 B of the first lens  506  is guided by the slanting surface  502 C of the light shielding holder  502 , so that the planarized section  506 A on the outer circumference side of the optical surface A is engaged to the bottom surface  502 D. As described above, the annular convex slanting surface  506 B of the first lens  506  and the annular concave slanting surface  502 C on the inner side of the light shielding holder  502  are guided together, so that the protruded annular convex slanting surface is engaged with the concaved annular concave slanting surface. As a result, the lens module  508  can be positioned along the engaging section of the light shielding holder  502  with high accuracy. Thereby, it becomes possible to prevent the misalignment or tilting of the lens optical axis C of the optical surface A relative to the aperture opening B of the light shielding holder  502  and the center of the aperture opening B, and make the optical characteristics favorable. 
     In Embodiment 2, if approximately 0.2 mm or more cannot be secured for the thickness t of the bottom surface section  502 D (ceiling section), there will be a problem of strength where sufficient rigidity will not be obtained. However, the image capturing element module  500  according to Embodiment 2 can be smaller (lower) than the image capturing element module  400  according to Embodiment 1 in an overall thickness T. The disadvantage of Embodiment 2 is that the optical surface A is protruded more than the spacer section  506 C, which makes the optical surface Amore subject to scratches and dust during processes such as combining. 
     Embodiment 3  
       FIG. 13  is a block diagram schematically illustrating an exemplary configuration of an electronic information device of Embodiment 3 of the present invention, using a solid-state image capturing apparatus including the sensor module  10  or  10 A according to Embodiment 1 or 2 of the present invention in an image capturing section. 
     In  FIG. 13 , an electronic information device  90  according to Embodiment 3 of the present invention includes: a solid-state image capturing apparatus  91  for performing various signal processing on an image capturing signal from the sensor module  10  or  10 A according to Embodiment 1 or 2 so as to obtain a color image signal; a memory section  92  (e.g., recording media) for data-recording a color image signal from the solid-state image capturing apparatus  91  after predetermined signal processing is performed on the color image signal for recording; a display section  93  (e.g., a liquid crystal display apparatus) for displaying the color image signal from the solid-state image capturing apparatus  91  on a display screen (e.g., liquid crystal display screen) after predetermined signal processing is performed on the color image signal for display; a communication section  94  (e.g., a transmitting and receiving device) for communicating the color image signal from the solid-state image capturing apparatus  91  after predetermined signal processing is performed on the color image signal for communication; and an image output section  95  (e.g., a printer) for printing the color image signal from the solid-state image capturing apparatus  91  after predetermined signal processing is performed for printing. Without the limitation to this, the electronic information device  90  may include at least any of the memory section  92 , the display section  93 , the communication section  94 , and the image output section  95 , other than the solid-state image capturing apparatus  91 . 
     As the electronic information device  90 , an electronic device that includes an image input device is conceivable, as described above, such as a digital camera (e.g., digital video camera or digital still camera), an image input camera (e.g., a monitoring camera, a door phone camera, a camera equipped in a vehicle including a back-view monitor camera, or a camera in a television telephone), a scanner, a facsimile machine, a camera-equipped cell phone device and a personal digital assistance (PDA). 
     Therefore, according to Embodiment 3 of the present invention, the color image signal from the solid-state image capturing apparatus  91  can be: displayed on a display screen properly by the display section  93 , printed out properly on a sheet of paper using an image output section  95 , communicated properly as communication data via a wire or a radio by the communication section  94 , stored properly at the memory section  92  by performing predetermined data compression processing; and various data processes can be properly performed. 
     Without the limitation to the electronic information device  90  according to Embodiment 3, the electronic information device may be a pick up apparatus including the electronic element module of the present invention used in an information recording and reproducing section thereof. In this case, the optical element of the pick up apparatus is an optical function element that directs output light straight to be output and refracting and guiding incident light in a predetermined direction (e.g., a hologram optical element). In addition, as the electronic element of the pick up apparatus, a light emitting element for emitting output light (e.g., a semiconductor laser element or a laser chip) and a light receiving element for receiving incident light (e.g., a. photo IC) are included. 
     Although not specifically described in detail, the following is performed in Embodiment 1 or 2: one or a plurality of optical elements are housed within a light shielding holder; a slanting surface is provided on an outer circumference side of an optical surface of the optical element facing an aperture opening of the light shielding holder; a slanting surface is provided on an inner surface on the back side of the aperture opening of the light shielding holder in such a manner to face the slanting surface of the optical element; and the slanting surface of the optical element and the slanting surface of the light shielding holder are guided together, so that the aperture opening of the light shielding holder and the optical surface of the optical element are positioned. Thereby, the annular slanting surface of the first lens and the annular slanting surface on the inner side of the light shielding holder are guided together, so that the protruded annular slanting surface is engaged with the concaved annular slanting surface. As a result, The objective of the present invention can be achieved, which is to make it possible to prevent the misalignment and tilting of the lens optical axis C relative to the aperture opening B of the light shielding holder and the center of the aperture opening B, to make the optical characteristics favorable. 
     As described above, the present invention is exemplified by the use of its preferred Embodiments 1 to 3. However, the present invention should not be interpreted solely based on Embodiments 1 to 3 described above. It is understood that the scope of the present invention should be interpreted solely based on the claims. It is also understood that those skilled in the art can implement equivalent scope of technology, based on the description of the present invention and common knowledge from the description of the detailed preferred Embodiments 1 to 3 of the present invention. Furthermore, it is understood that any patent, any patent application and any references cited in the present specification should be incorporated by reference in the present specification in the same manner as the contents are specifically described therein. 
     INDUSTRIAL APPLICABILITY 
     The present invention can be applied in the field of an optical element module, such as a lens module and an optical function element module, in which one or a plurality of optical elements are housed within a light shielding holder, and a manufacturing method thereof; an electronic element module obtained by modularizing the optical element module and an electronic element, and a manufacturing method thereof; and an electronic information device, such as a digital camera (e.g., a digital video camera or a digital still camera), an image input camera (e.g., a monitoring camera), a scanner, a facsimile machine, a television telephone device and a camera-equipped cell phone device, including the electronic element module as an image input device used in an image capturing section thereof. The annular slanting surface of the first lens and the annular slanting surface of the light shielding holder are guided together, and the protruded annular slanting surface is engaged with the concaved annular slanting surface. Therefore, it becomes possible to position, for example, the lens module consisting of the first lens and the second lens with high accuracy along the engaging section of the light shielding holder. As a result, it becomes possible to prevent the misalignment and tilting of the lens optical axis C relative to the aperture opening of the lens tube and the center of the aperture opening to make the optical characteristics favorable. 
     Various other modifications will be apparent to and can be readily made by those skilled in the art without departing from the scope and spirit of this invention. Accordingly, it is not intended that the scope of the claims appended hereto be limited to the description as set forth herein, but rather that the claims be broadly construed.