WO2019003580A1 - Camera module and method for manufacturing camera module - Google Patents

Camera module and method for manufacturing camera module Download PDF

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Publication number
WO2019003580A1
WO2019003580A1 PCT/JP2018/015638 JP2018015638W WO2019003580A1 WO 2019003580 A1 WO2019003580 A1 WO 2019003580A1 JP 2018015638 W JP2018015638 W JP 2018015638W WO 2019003580 A1 WO2019003580 A1 WO 2019003580A1
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Prior art keywords
sheet member
camera module
adhesive
sheet
imaging device
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PCT/JP2018/015638
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French (fr)
Japanese (ja)
Inventor
晃弘 飯田
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シャープ株式会社
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Publication of WO2019003580A1 publication Critical patent/WO2019003580A1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith

Definitions

  • the present invention relates to a camera module in which a sheet member is mounted on an imaging device and a method of manufacturing the camera module.
  • Patent Document 1 a camera using a microlens array (hereinafter referred to as a sheet lens) represented by a light field camera has attracted attention as a technology of a next-generation camera.
  • the adhesive intrudes into the image area (effective area) of the imaging device, and affects the resolution of the image captured by the imaging device.
  • the penetration of the adhesive into the gap between the sheet lens and the imaging device affects the distance from the sensor surface of the imaging device to the lens surface of the sheet lens.
  • IR cut filter InfraRed Cut Filter
  • infrared cut filter which is a thin sheet member in the form of a film
  • An aspect of the present invention aims to realize a camera module in which a sheet member is assembled with high accuracy on an imaging device and a method of manufacturing the camera module.
  • a camera module includes an imaging device mounted on a substrate, a sheet member disposed on the imaging device, and the imaging of the sheet member In order to be fixed to the upper surface of the element, it is characterized by comprising an adhesive applied so as to straddle the upper surface of the sheet member and the upper surface of the imaging device.
  • the manufacturing method of the camera module concerning one mode of the present invention has the mounting process of mounting an image sensor on a substrate, the arrangement process of arranging a sheet member on the image sensor, and And a step of applying an adhesive so as to straddle the upper surface of the sheet member and the upper surface of the imaging device in order to fix the sheet member to the upper surface of the imaging device.
  • a camera module in which a sheet member is assembled with high accuracy on an imaging device and a method of manufacturing the camera module.
  • FIG. 1 is a perspective view of a camera module according to Embodiment 1.
  • A is a top view of the sheet lens provided in the said camera module
  • (b) is the principal part expanded cross-sectional perspective view. It is principal part sectional drawing of the said camera module. It is a principal part enlarged plan view which shows the through-hole formed in the said sheet lens. It is a sectional view of a camera module concerning a comparative example.
  • (A) is a top view of the camera module which concerns on Embodiment 2
  • (b) is a principal part expansion perspective view.
  • FIG. 1 is a perspective view of the camera module 1 according to the first embodiment.
  • the camera module 1 includes an imaging device 3 mounted on a substrate (not shown), and a sheet lens 2 (sheet member, optical component) disposed on the imaging device 3.
  • the sheet lens 2 is a thin member in the form of a film in which a large number of microlenses 7 are formed in an effective area 6 where the performance of the microlenses 7 is effectively exhibited.
  • the camera module 1 is provided with an adhesive 5 applied so as to straddle the upper surface of the sheet lens 2 and the upper surface of the imaging device 3.
  • FIG. 2 (a) is a plan view of the sheet lens 2 provided in the camera module 1
  • FIG. 2 (b) is an enlarged perspective view of the main part thereof.
  • an intrusion preventing wall 8 intrusion preventing portion, wall
  • the application area 9 application part
  • the intrusion prevention wall 8 is not limited to the intrusion prevention wall 8 as long as the intrusion of the adhesive 5 into the effective area 6 of the sheet lens 2 can be prevented. Instead of the intrusion prevention wall 8, a groove may be formed, or a non-smooth surface portion in which peaks and valleys are alternately formed may be disposed.
  • the adhesive 5 to be applied is preferably a UV (ultraviolet) curing resin from the viewpoint of adhesive strength and convenience.
  • the adhesive 5 is not limited to the UV curing resin.
  • the sheet lens 2 may be configured by one sheet, or may be configured by stacking a plurality of sheets.
  • FIG. 3 is a cross-sectional view of an essential part of the camera module 1.
  • the sheet lens 2 is an adhesive trap groove 4 formed on the surface of the sheet lens 2 facing the imaging element 3 in order to prevent the adhesive 5 from invading the effective area 6 in which a large number of micro lenses 7 are formed. Intrusion prevention portion, groove portion).
  • the adhesive 5 which is about to enter the effective area 6 through the gap between the sheet lens 2 and the imaging device 3 due to the capillary phenomenon is accumulated in the adhesive trap groove 4. Therefore, the intrusion of the adhesive 5 between the sheet lens 2 and the imaging device 3 into the effective area 6 is prevented.
  • the adhesive trap groove 4 is not limited to the adhesive trap groove 4 as long as it can prevent the adhesive 5 from invading the effective area 6 of the sheet lens 2. Instead of the adhesive trap groove 4, non-smooth surface portions in which peaks and valleys are alternately formed may be disposed.
  • the adhesive trap groove 4 may be formed on the surface opposite to the surface facing the imaging device 3. Thereby, the intrusion of the adhesive 5 from the upper direction of the sheet lens 2 is prevented.
  • FIG. 4 is an enlarged plan view of an essential part showing the through hole 10 formed in the sheet lens 2.
  • the sheet lens 2 has a through hole 10 (temporarily fixed shape portion) for preventing the movement of the sheet lens 2 from being disposed on the imaging element 3 to when the adhesive 5 is applied.
  • the through holes 10 are formed at four corners of the sheet lens 2 as shown in FIG. 2A, for example.
  • the sheet lens 2 when a small amount of adhesive is applied to the through hole 10 after the sheet lens 2 is disposed on the imaging element 3, the sheet lens 2 can be prevented from moving unexpectedly.
  • the through hole 10 is not limited to the through hole 10 as long as the movement of the sheet lens 2 is prevented between the time when the sheet lens 2 is disposed on the imaging device 3 and the time when the adhesive 5 is applied.
  • a recess may be formed instead of the through hole 10.
  • Each of the large number of microlenses 7 formed in the sheet lens 2 is provided to image a minute region of the imaging device 3.
  • the focal length and back focus of the microlens 7 are, for example, 1/100 to the optical length of a general lens of a mobile phone camera using an imaging device of about 1/4 to 1 inch size, for example. It is as short as 1/10. Therefore, as for the sheet lens 2 in which the micro lens 7 is formed, the mounting displacement to the image pickup element 3 largely affects the optical performance as compared with the general lens.
  • the sheet lens 2 when the sheet lens 2 is mounted on the imaging element 3, mounting accuracy higher than that of the general lens is required. Although the mounting accuracy depends on the image pickup device to be mounted, the required specifications and the like, it is considered that mounting accuracy of micron order or less is necessary practically.
  • the mounting accuracy of a general high-resolution lens of a camera for a mobile phone may be, for example, within ⁇ 0.01 mm ( ⁇ 10 microns).
  • the sheet lens 2 can be mounted on the imaging device 3 with a mounting accuracy of micron order or less.
  • FIG. 5 is a cross-sectional view of a camera module according to a comparative example.
  • the sheet lens 2 is required to have high mounting accuracy, when the adhesive 5 penetrates between the imaging device 3 and the sheet lens 2, there arises a problem that the sheet lens 2 floats from the imaging device 3. In the case of the sheet lens 2, for example, even if it floats from the imaging device 3 by about 10 ⁇ m, the characteristics of the camera module are greatly affected.
  • the adhesive 5 is not applied to the lower surface of the sheet lens 2 but applied so as to straddle the upper surface of the sheet lens 2 and the upper surface of the imaging device 3. As a result, the floating of the sheet lens 2 from the imaging device 3 is suppressed.
  • the adhesive trap groove 4 shown in FIG. 3 on the lower surface of the sheet lens 2, the intrusion of the adhesive 5 based on the capillary phenomenon between the sheet lens 2 and the imaging device 3 is prevented, and the sheet lens 2 The floating from the imaging device 3 is further suppressed, and the sheet lens 2 can be mounted on the imaging device 3 with high accuracy.
  • FIG. 6A is a plan view of the camera module 1A according to the second embodiment, and FIG. 6B is an enlarged perspective view of the main part.
  • the camera module 1A further includes a reinforcing member 11 formed outside the effective area 6 in order to reinforce the strength of the sheet lens 2.
  • the reinforcing member 11 is formed in a frame shape along the outer edge of the sheet lens 2 outside the intrusion prevention wall 8. When the sheet lens 2 is mounted on the imaging device 3, tilting, warping, or deformation of the sheet lens 2 is suppressed by the weight or pressure of the reinforcing member 11.
  • the reinforcing member 11 may be made of a metal material or a resin material as long as the rigidity is stronger than the sheet lens 2 and the flatness and the parallelism are good.
  • a camera module 1 / 1A includes an imaging device 3 mounted on a substrate, a sheet member (sheet lens 2) disposed on the imaging device 3, and the sheet member (sheet) In order to fix the lens 2) to the upper surface of the image pickup device 3, an adhesive 5 applied so as to straddle the upper surface of the sheet member (sheet lens 2) and the upper surface of the image pickup device 3 is provided.
  • the adhesive is applied so as to straddle the upper surface of the sheet member and the upper surface of the imaging device. For this reason, since the adhesive is not applied between the sheet member and the imaging device, floating of the sheet member from the imaging device is suppressed. As a result, it is possible to realize a camera module in which the sheet member is assembled to the imaging device with high accuracy.
  • the sheet member (sheet lens 2) moves to the effective area 6 where the performance of the sheet member (sheet lens 2) is effectively exhibited.
  • the sheet member (sheet lens 2) may have an intrusion preventing portion (adhesive trap groove 4) formed on at least one of the lower surface and the upper surface.
  • the adhesive that tries to intrude into the effective area is stored in the intrusion prevention unit, and the intrusion of the adhesive into the effective area is suppressed.
  • the intrusion prevention portion may include at least one of a groove (adhesive trap groove 4) and a non-smooth surface portion.
  • invasion to the effective area of an adhesive agent is suppressed by easy structure.
  • the sheet member (sheet lens 2) moves to the effective area 6 where the performance of the sheet member (sheet lens 2) is effectively exhibited.
  • An intrusion preventing portion (invasion preventing wall 8) formed on the upper surface of the sheet member (sheet lens 2) to prevent the adhesive 5 from invading, and the intrusion preventing portion (invading to apply the adhesive 5)
  • invade into an effective area through the upper surface of a sheet member can be suppressed.
  • the intrusion preventing portion may include at least one of a wall portion, a groove portion and a non-smooth surface portion.
  • invasion to the effective area of an adhesive agent is suppressed by easy structure.
  • the sheet member (the sheet lens 2) is disposed on the imaging element 3 until the adhesive 5 is applied. It may have a temporarily fixed shape part (through hole 10) for preventing movement of the sheet member (sheet lens 2) in between.
  • the temporarily fixed shape portion may include at least one of a through hole or a recess.
  • the camera module 1A according to aspect 8 of the present invention is the effective area in which the performance of the sheet member (sheet lens 2) is effectively exhibited in order to reinforce the strength of the sheet member (sheet lens 2) in the above-mentioned aspect 1. You may further provide the reinforcement member 11 formed in the outer side of six.
  • the sheet member may include an optical component.
  • the optical component may include a sheet lens.
  • the method for manufacturing a camera module according to aspect 11 of the present invention includes a mounting step of mounting the imaging device 3 on a substrate, an arranging step of arranging a sheet member (sheet lens 2) on the imaging device 3, and In order to fix a sheet member (sheet lens 2) to the upper surface of the imaging device 3, an application step of applying an adhesive 5 so as to straddle the upper surface of the sheet member (sheet lens 2) and the upper surface of the imaging device 3 And.

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Abstract

In order to assemble a sheet member to an imaging element with high accuracy, a camera module (1) is provided with an imaging element (3) mounted on a substrate, a sheet lens (2) disposed on the imaging element (3), and an adhesive (5) applied so as to stretch over the upper surface of the sheet lens (2) and the upper surface of the imaging element (3) in order to secure the sheet lens (2) to the upper surface of the imaging element (3).

Description

カメラモジュール及びカメラモジュールの製造方法Camera module and method of manufacturing camera module
　本発明は、シート部材が撮像素子に搭載されるカメラモジュール及びカメラモジュールの製造方法に関する。 The present invention relates to a camera module in which a sheet member is mounted on an imaging device and a method of manufacturing the camera module.
　近年、ライトフィールドカメラに代表されるマイクロレンズアレイ（以下、シートレンズという）を用いたカメラが、次世代カメラの技術として注目を浴びている（特許文献１）。 In recent years, a camera using a microlens array (hereinafter referred to as a sheet lens) represented by a light field camera has attracted attention as a technology of a next-generation camera (Patent Document 1).
日本国公開特許公報「特表2015-520992号公報（2015年7月23日公開）」Japanese patent publication "Tokukai 2015-520992 (July 23, 2015 release)"
　しかしながら、フィルム状の薄い部材であるシートレンズを撮像素子の上に接着剤で搭載しようとする場合に、以下の課題が生じる。 However, when the sheet lens, which is a thin film member, is to be mounted by an adhesive on the imaging device, the following problems occur.
　まず、撮像素子のイメージエリア（有効領域）内に接着剤が侵入し、撮像素子により撮像された画像の解像度に影響を与える。 First, the adhesive intrudes into the image area (effective area) of the imaging device, and affects the resolution of the image captured by the imaging device.
　次に、シートレンズと撮像素子との隙間への接着剤の侵入が、撮像素子のセンサ面からシートレンズのレンズ面までの距離に影響を与える。 Next, the penetration of the adhesive into the gap between the sheet lens and the imaging device affects the distance from the sensor surface of the imaging device to the lens surface of the sheet lens.
　これらの課題は、フィルム状の薄いシート部材であるＩＲカットフィルター（ＩＲＣＦ（InfraRed Cut Filter）、赤外カットフィルター）を被搭載部材に搭載する際にも同様に生じる。 These problems similarly occur when an IR cut filter (IRCF (InfraRed Cut Filter), infrared cut filter), which is a thin sheet member in the form of a film, is mounted on a mounting member.
　本発明の一態様は、シート部材が撮像素子に高い精度で組み立てられたカメラモジュール及びカメラモジュールの製造方法を実現することを目的とする。 An aspect of the present invention aims to realize a camera module in which a sheet member is assembled with high accuracy on an imaging device and a method of manufacturing the camera module.
　上記の課題を解決するために、本発明の一態様に係るカメラモジュールは、基板の上に搭載された撮像素子と、前記撮像素子の上に配置されたシート部材と、前記シート部材を前記撮像素子の上面に固定するために、前記シート部材の上面と前記撮像素子の上面とを跨ぐように塗布された接着剤とを備えることを特徴とする。 In order to solve the above problems, a camera module according to an aspect of the present invention includes an imaging device mounted on a substrate, a sheet member disposed on the imaging device, and the imaging of the sheet member In order to be fixed to the upper surface of the element, it is characterized by comprising an adhesive applied so as to straddle the upper surface of the sheet member and the upper surface of the imaging device.
　上記の課題を解決するために、本発明の一態様に係るカメラモジュールの製造方法は、基板の上に撮像素子を搭載する搭載工程と、前記撮像素子の上にシート部材を配置する配置工程と、前記シート部材を前記撮像素子の上面に固定するために、前記シート部材の上面と前記撮像素子の上面とを跨ぐように接着剤を塗布する塗布工程とを包含することを特徴とする。 In order to solve the above-mentioned subject, the manufacturing method of the camera module concerning one mode of the present invention has the mounting process of mounting an image sensor on a substrate, the arrangement process of arranging a sheet member on the image sensor, and And a step of applying an adhesive so as to straddle the upper surface of the sheet member and the upper surface of the imaging device in order to fix the sheet member to the upper surface of the imaging device.
　本発明の一態様によれば、シート部材が撮像素子に高い精度で組み立てられたカメラモジュール及びカメラモジュールの製造方法を実現することができるという効果を奏する。 According to an aspect of the present invention, it is possible to realize a camera module in which a sheet member is assembled with high accuracy on an imaging device and a method of manufacturing the camera module.
実施形態１に係るカメラモジュールの斜視図である。FIG. 1 is a perspective view of a camera module according to Embodiment 1. （ａ）は上記カメラモジュールに設けられたシートレンズの平面図であり、（ｂ）はその要部拡大断面斜視図である。(A) is a top view of the sheet lens provided in the said camera module, (b) is the principal part expanded cross-sectional perspective view. 上記カメラモジュールの要部断面図である。It is principal part sectional drawing of the said camera module. 上記シートレンズに形成された貫通孔を示す要部拡大平面図である。It is a principal part enlarged plan view which shows the through-hole formed in the said sheet lens. 比較例に係るカメラモジュールの断面図である。It is a sectional view of a camera module concerning a comparative example. （ａ）は実施形態２に係るカメラモジュールの平面図であり、（ｂ）は要部拡大斜視図である。(A) is a top view of the camera module which concerns on Embodiment 2, (b) is a principal part expansion perspective view.
　以下、本発明の実施の形態について、詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail.
　〔実施形態１〕
　図１は実施形態１に係るカメラモジュール１の斜視図である。カメラモジュール１は、図示しない基板の上に搭載された撮像素子３と、撮像素子３の上に配置されたシートレンズ２（シート部材、光学部品）とを備える。シートレンズ２は、マイクロレンズ７の性能を有効に発揮する有効エリア６内に多数のマイクロレンズ７が形成されたフィルム状の薄い部材である。 Embodiment 1
FIG. 1 is a perspective view of the camera module 1 according to the first embodiment. The camera module 1 includes an imaging device 3 mounted on a substrate (not shown), and a sheet lens 2 (sheet member, optical component) disposed on the imaging device 3. The sheet lens 2 is a thin member in the form of a film in which a large number of microlenses 7 are formed in an effective area 6 where the performance of the microlenses 7 is effectively exhibited.
　カメラモジュール１には、シートレンズ２を撮像素子３の上面に固定するために、シートレンズ２の上面と撮像素子３の上面とを跨ぐように塗布された接着剤５が設けられる。 In order to fix the sheet lens 2 to the upper surface of the imaging device 3, the camera module 1 is provided with an adhesive 5 applied so as to straddle the upper surface of the sheet lens 2 and the upper surface of the imaging device 3.
　図２（ａ）はカメラモジュール１に設けられたシートレンズ２の平面図であり、（ｂ）はその要部拡大断面斜視図である。多数のマイクロレンズ７が形成された有効エリア６の外縁に沿って、有効エリア６への接着剤５の侵入を防止する侵入防止壁８（侵入防止部、壁部）がシートレンズ２の上面に形成される。そして、侵入防止壁８の外側に、接着剤５が塗布される塗布エリア９（塗布部）が配置される。 FIG. 2 (a) is a plan view of the sheet lens 2 provided in the camera module 1, and FIG. 2 (b) is an enlarged perspective view of the main part thereof. Along the outer edge of the effective area 6 where a large number of micro lenses 7 are formed, an intrusion preventing wall 8 (intrusion preventing portion, wall) for preventing the adhesive 5 from invading the effective area 6 is formed on the upper surface of the sheet lens 2 It is formed. And the application area 9 (application part) where the adhesive 5 is applied is arrange | positioned on the outer side of the penetration prevention wall 8. As shown in FIG.
　侵入防止壁８は、シートレンズ２の有効エリア６への接着剤５の侵入を防止することができればよく、侵入防止壁８に限定されない。侵入防止壁８の代わりに、溝部を形成してもよいし、山部と谷部とが交互に形成された非平滑面部を配置してもよい。 The intrusion prevention wall 8 is not limited to the intrusion prevention wall 8 as long as the intrusion of the adhesive 5 into the effective area 6 of the sheet lens 2 can be prevented. Instead of the intrusion prevention wall 8, a groove may be formed, or a non-smooth surface portion in which peaks and valleys are alternately formed may be disposed.
　塗布される接着剤５は、接着強度と簡便性との観点からＵＶ（ultraviolet）硬化樹脂が好ましい。但し、接着剤５はＵＶ硬化樹脂に限定されない。 The adhesive 5 to be applied is preferably a UV (ultraviolet) curing resin from the viewpoint of adhesive strength and convenience. However, the adhesive 5 is not limited to the UV curing resin.
　シートレンズ２は、１枚のシートにより構成してもよいし、複数のシートを重ねて構成してもよい。 The sheet lens 2 may be configured by one sheet, or may be configured by stacking a plurality of sheets.
　図３はカメラモジュール１の要部断面図である。シートレンズ２は、多数のマイクロレンズ７が形成された有効エリア６への接着剤５の侵入を防止するためにシートレンズ２の撮像素子３に対向する面に形成された接着剤トラップ溝４（侵入防止部、溝部）を有する。これにより、毛細管現象によりシートレンズ２と撮像素子３との間を通って有効エリア６へ侵入しようとする接着剤５が接着剤トラップ溝４内に溜まる。従って、シートレンズ２と撮像素子３との間の接着剤５の有効エリア６への侵入が防止される。 FIG. 3 is a cross-sectional view of an essential part of the camera module 1. The sheet lens 2 is an adhesive trap groove 4 formed on the surface of the sheet lens 2 facing the imaging element 3 in order to prevent the adhesive 5 from invading the effective area 6 in which a large number of micro lenses 7 are formed. Intrusion prevention portion, groove portion). As a result, the adhesive 5 which is about to enter the effective area 6 through the gap between the sheet lens 2 and the imaging device 3 due to the capillary phenomenon is accumulated in the adhesive trap groove 4. Therefore, the intrusion of the adhesive 5 between the sheet lens 2 and the imaging device 3 into the effective area 6 is prevented.
　接着剤トラップ溝４は、シートレンズ２の有効エリア６への接着剤５の侵入を防止することができればよく、接着剤トラップ溝４に限定されない。接着剤トラップ溝４の代わりに、山部と谷部とが交互に形成された非平滑面部を配置してもよい。 The adhesive trap groove 4 is not limited to the adhesive trap groove 4 as long as it can prevent the adhesive 5 from invading the effective area 6 of the sheet lens 2. Instead of the adhesive trap groove 4, non-smooth surface portions in which peaks and valleys are alternately formed may be disposed.
　また、接着剤トラップ溝４は、撮像素子３に対向する面とは反対の面に形成されていても良い。これにより、シートレンズ２の上方向からの接着剤５の侵入が防止される。 Further, the adhesive trap groove 4 may be formed on the surface opposite to the surface facing the imaging device 3. Thereby, the intrusion of the adhesive 5 from the upper direction of the sheet lens 2 is prevented.
　さらに、接着剤トラップ溝４をシートレンズ２の上記２面共に形成することで、更なる接着剤５の有効エリア６への侵入防止が期待できる。 Further, by forming the adhesive trap groove 4 together with the two surfaces of the sheet lens 2, it is possible to expect further prevention of the adhesive 5 from entering the effective area 6.
　図４はシートレンズ２に形成された貫通孔１０を示す要部拡大平面図である。シートレンズ２は、撮像素子３の上に配置されてから接着剤５が塗布されるまでの間のシートレンズ２の移動を防止するための貫通孔１０（仮固定形状部）を有する。貫通孔１０は、例えば図２（ａ）に示すように、シートレンズ２の四隅に形成される。 FIG. 4 is an enlarged plan view of an essential part showing the through hole 10 formed in the sheet lens 2. The sheet lens 2 has a through hole 10 (temporarily fixed shape portion) for preventing the movement of the sheet lens 2 from being disposed on the imaging element 3 to when the adhesive 5 is applied. The through holes 10 are formed at four corners of the sheet lens 2 as shown in FIG. 2A, for example.
　例えば、シートレンズ２が撮像素子３の上に配置されてから貫通孔１０に接着剤を少量塗布すると、シートレンズ２が想定外に動くことを防止することができる。 For example, when a small amount of adhesive is applied to the through hole 10 after the sheet lens 2 is disposed on the imaging element 3, the sheet lens 2 can be prevented from moving unexpectedly.
　貫通孔１０は、シートレンズ２が撮像素子３の上に配置されてから接着剤５が塗布されるまでの間にシートレンズ２の移動が防止されればよく、貫通孔１０に限定されない。例えば、貫通孔１０の代わりに凹部を形成してもよい。 The through hole 10 is not limited to the through hole 10 as long as the movement of the sheet lens 2 is prevented between the time when the sheet lens 2 is disposed on the imaging device 3 and the time when the adhesive 5 is applied. For example, a recess may be formed instead of the through hole 10.
　シートレンズ２に形成される多数のマイクロレンズ７のそれぞれは、撮像素子３の微小領域を撮像するために設けられる。このため、マイクロレンズ７の焦点距離やバックフォーカスは、例えば、１／４から１インチサイズ程度の撮像素子を用いる携帯電話用カメラの一般的レンズの光学長に比べて、例えば、１／１００から１／１０程度に短い。従って、マイクロレンズ７が形成されたシートレンズ２は、上記一般的レンズに比べて、撮像素子３への搭載ずれが光学性能に大きく影響する。 Each of the large number of microlenses 7 formed in the sheet lens 2 is provided to image a minute region of the imaging device 3. For this reason, the focal length and back focus of the microlens 7 are, for example, 1/100 to the optical length of a general lens of a mobile phone camera using an imaging device of about 1/4 to 1 inch size, for example. It is as short as 1/10. Therefore, as for the sheet lens 2 in which the micro lens 7 is formed, the mounting displacement to the image pickup element 3 largely affects the optical performance as compared with the general lens.
　特に、ライトフィールドカメラでは、マイクロレンズと撮像素子との間の距離が任意の距離に定められていることを前提に被写体との距離測定の演算を行う。このため、シートレンズの搭載ずれの抑制は、原理上重要である。 In particular, in the light field camera, calculation of distance measurement with the subject is performed on the premise that the distance between the microlens and the imaging device is set to an arbitrary distance. For this reason, suppression of mounting displacement of the sheet lens is important in principle.
　また、シートレンズを利用した超解像度処理による高解像度画像を得る技術も報告されているが（蚊野浩（２０１２年８月）、「ＭＡＰ型超解像処理における復元誤差を考慮したライトフィールドカメラ画像の高画素化」、画像の認識・理解シンポジウム（ＭＩＲＵ２０１２））、このような用途の製品においては、個々の画像だけでなく、シートレンズの有効エリア全域で安定した画像が得られることが、品質上重要である。 In addition, technology to obtain high resolution images by super resolution processing using a sheet lens has also been reported (Kamikino Hiroshi (August 2012), “light field camera image considering recovery error in MAP type super resolution processing The image recognition and understanding symposium (MIRU 2012)), and in products for such applications, it is possible to obtain stable images over the entire effective area of the sheet lens as well as individual images. Top important.
　このように、シートレンズ２を撮像素子３に搭載するときは、上記一般的レンズよりも高い搭載精度が要求される。この搭載精度は、搭載する撮像素子、要求仕様等にも依存するが、実用上ミクロンオーダー以下の搭載精度が必要と考えられる。これに対して、携帯電話用カメラの一般的高解像度レンズの搭載精度は、例えば、±０．０１ｍｍ（±１０ミクロン）以内で足りる。本実施形態によれば、ミクロンオーダー以下の搭載精度でシートレンズ２を撮像素子３に搭載することができる。 As described above, when the sheet lens 2 is mounted on the imaging element 3, mounting accuracy higher than that of the general lens is required. Although the mounting accuracy depends on the image pickup device to be mounted, the required specifications and the like, it is considered that mounting accuracy of micron order or less is necessary practically. On the other hand, the mounting accuracy of a general high-resolution lens of a camera for a mobile phone may be, for example, within ± 0.01 mm (± 10 microns). According to the present embodiment, the sheet lens 2 can be mounted on the imaging device 3 with a mounting accuracy of micron order or less.
　図５は比較例に係るカメラモジュールの断面図である。前述したようにシートレンズ２は高い搭載精度が要求されるため、撮像素子３とシートレンズ２との間に接着剤５が侵入すると、シートレンズ２が撮像素子３から浮くという問題が生じる。シートレンズ２の場合、例えば１０μｍ程度、撮像素子３から浮いただけでも、カメラモジュールの特性に大きく影響する。 FIG. 5 is a cross-sectional view of a camera module according to a comparative example. As described above, since the sheet lens 2 is required to have high mounting accuracy, when the adhesive 5 penetrates between the imaging device 3 and the sheet lens 2, there arises a problem that the sheet lens 2 floats from the imaging device 3. In the case of the sheet lens 2, for example, even if it floats from the imaging device 3 by about 10 μm, the characteristics of the camera module are greatly affected.
　このため、本実施形態では、接着剤５は、シートレンズ２の下面には塗布せず、シートレンズ２の上面と撮像素子３の上面とを跨ぐように塗布する。この結果、シートレンズ２の撮像素子３からの浮きが抑制される。 For this reason, in the present embodiment, the adhesive 5 is not applied to the lower surface of the sheet lens 2 but applied so as to straddle the upper surface of the sheet lens 2 and the upper surface of the imaging device 3. As a result, the floating of the sheet lens 2 from the imaging device 3 is suppressed.
　また、図３に示す接着剤トラップ溝４をシートレンズ２の下面に形成することにより、シートレンズ２と撮像素子３との間の毛細管現象に基づく接着剤５の侵入が阻止され、シートレンズ２の撮像素子３からの浮きがさらに抑制され、撮像素子３にシートレンズ２を高い精度で搭載することができる。 Further, by forming the adhesive trap groove 4 shown in FIG. 3 on the lower surface of the sheet lens 2, the intrusion of the adhesive 5 based on the capillary phenomenon between the sheet lens 2 and the imaging device 3 is prevented, and the sheet lens 2 The floating from the imaging device 3 is further suppressed, and the sheet lens 2 can be mounted on the imaging device 3 with high accuracy.
　〔実施形態２〕
　本発明の他の実施形態について、図６に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、前記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。 Second Embodiment
Another embodiment of the present invention is described below with reference to FIG. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended and the description is abbreviate | omitted.
　図６（ａ）は実施形態２に係るカメラモジュール１Ａの平面図であり、（ｂ）は要部拡大斜視図である。カメラモジュール１Ａは、シートレンズ２の強度を補強するために、有効エリア６の外側に形成される補強部材１１をさらに備える。補強部材１１は、侵入防止壁８の外側においてシートレンズ２の外縁に沿って枠状に形成される。撮像素子３にシートレンズ２が搭載されるときに、補強部材１１の自重又は押圧により、シートレンズ２の傾き、反り、変形が抑制される。 FIG. 6A is a plan view of the camera module 1A according to the second embodiment, and FIG. 6B is an enlarged perspective view of the main part. The camera module 1A further includes a reinforcing member 11 formed outside the effective area 6 in order to reinforce the strength of the sheet lens 2. The reinforcing member 11 is formed in a frame shape along the outer edge of the sheet lens 2 outside the intrusion prevention wall 8. When the sheet lens 2 is mounted on the imaging device 3, tilting, warping, or deformation of the sheet lens 2 is suppressed by the weight or pressure of the reinforcing member 11.
　補強部材１１は、シートレンズ２よりも剛性が強く、且つ、平面度と平行度とが良好であれば、金属材料で構成してもよいし、樹脂材料で構成してもよい。 The reinforcing member 11 may be made of a metal material or a resin material as long as the rigidity is stronger than the sheet lens 2 and the flatness and the parallelism are good.
　〔まとめ〕
　本発明の態様１に係るカメラモジュール１・１Ａは、基板の上に搭載された撮像素子３と、前記撮像素子３の上に配置されたシート部材（シートレンズ２）と、前記シート部材（シートレンズ２）を前記撮像素子３の上面に固定するために、前記シート部材（シートレンズ２）の上面と前記撮像素子３の上面とを跨ぐように塗布された接着剤５とを備える。 [Summary]
A camera module 1 / 1A according to aspect 1 of the present invention includes an imaging device 3 mounted on a substrate, a sheet member (sheet lens 2) disposed on the imaging device 3, and the sheet member (sheet) In order to fix the lens 2) to the upper surface of the image pickup device 3, an adhesive 5 applied so as to straddle the upper surface of the sheet member (sheet lens 2) and the upper surface of the image pickup device 3 is provided.
　上記の構成によれば、シート部材の上面と撮像素子の上面とを跨ぐように接着剤が塗布される。このため、シート部材と撮像素子との間に接着剤が塗布されないので、シート部材の撮像素子からの浮きが抑制される。この結果、シート部材が撮像素子に高い精度で組み立てられたカメラモジュールを実現することができる。 According to the above configuration, the adhesive is applied so as to straddle the upper surface of the sheet member and the upper surface of the imaging device. For this reason, since the adhesive is not applied between the sheet member and the imaging device, floating of the sheet member from the imaging device is suppressed. As a result, it is possible to realize a camera module in which the sheet member is assembled to the imaging device with high accuracy.
　本発明の態様２に係るカメラモジュール１・１Ａは、上記態様１において、前記シート部材（シートレンズ２）が、前記シート部材（シートレンズ２）の性能を有効に発揮する有効エリア６への前記接着剤５の侵入を防止するために前記シート部材（シートレンズ２）の下面と上面との少なくとも一方に形成された侵入防止部（接着剤トラップ溝４）を有してもよい。 In the camera module 1 / 1A according to aspect 2 of the present invention, in the above aspect 1, the sheet member (sheet lens 2) moves to the effective area 6 where the performance of the sheet member (sheet lens 2) is effectively exhibited. In order to prevent intrusion of the adhesive 5, the sheet member (sheet lens 2) may have an intrusion preventing portion (adhesive trap groove 4) formed on at least one of the lower surface and the upper surface.
　上記の構成によれば、有効エリアに侵入しようとする接着剤が侵入防止部に貯留され、接着剤の有効エリアへの侵入が抑制される。 According to the above configuration, the adhesive that tries to intrude into the effective area is stored in the intrusion prevention unit, and the intrusion of the adhesive into the effective area is suppressed.
　本発明の態様３に係るカメラモジュール１・１Ａは、上記態様２において、前記侵入防止部が、溝部（接着剤トラップ溝４）と非平滑面部との少なくとも一方を含んでもよい。 In the camera module 1 / 1A according to aspect 3 of the present invention, in the aspect 2, the intrusion prevention portion may include at least one of a groove (adhesive trap groove 4) and a non-smooth surface portion.
　上記の構成によれば、簡単な構成で、接着剤の有効エリアへの侵入が抑制される。 According to said structure, the penetration | invasion to the effective area of an adhesive agent is suppressed by easy structure.
　本発明の態様４に係るカメラモジュール１・１Ａは、上記態様１において、前記シート部材（シートレンズ２）が、前記シート部材（シートレンズ２）の性能を有効に発揮する有効エリア６への前記接着剤５の侵入を防止するために前記シート部材（シートレンズ２）の上面に形成された侵入防止部（侵入防止壁８）と、前記接着剤５を塗布するために前記侵入防止部（侵入防止壁８）に対して前記有効エリア６の反対側に設けられた塗布部（塗布エリア９）とを有してもよい。 In the camera module 1 / 1A according to aspect 4 of the present invention, in the above aspect 1, the sheet member (sheet lens 2) moves to the effective area 6 where the performance of the sheet member (sheet lens 2) is effectively exhibited. An intrusion preventing portion (invasion preventing wall 8) formed on the upper surface of the sheet member (sheet lens 2) to prevent the adhesive 5 from invading, and the intrusion preventing portion (invading to apply the adhesive 5) You may have the application part (application area 9) provided in the other side of the said effective area 6 with respect to the prevention wall 8).
　上記の構成によれば、シート部材の上面を通って有効エリアに侵入しようとする接着剤の侵入を抑制することができる。 According to said structure, the penetration | invasion of the adhesive agent which tries to penetrate | invade into an effective area through the upper surface of a sheet member can be suppressed.
　本発明の態様５に係るカメラモジュール１・１Ａは、上記態様４において、前記侵入防止部（侵入防止壁８）が、壁部と溝部と非平滑面部との少なくとも一つを含んでもよい。 In the camera module 1 / 1A according to aspect 5 of the present invention, in the aspect 4, the intrusion preventing portion (intrusion preventing wall 8) may include at least one of a wall portion, a groove portion and a non-smooth surface portion.
　上記の構成によれば、簡単な構成で、接着剤の有効エリアへの侵入が抑制される。 According to said structure, the penetration | invasion to the effective area of an adhesive agent is suppressed by easy structure.
　本発明の態様６に係るカメラモジュール１・１Ａは、上記態様１において、前記シート部材（シートレンズ２）が、前記撮像素子３の上に配置されてから前記接着剤５が塗布されるまでの間の前記シート部材（シートレンズ２）の移動を防止するための仮固定形状部（貫通孔１０）を有してもよい。 In the camera module 1 / 1A according to the sixth aspect of the present invention, in the first aspect, the sheet member (the sheet lens 2) is disposed on the imaging element 3 until the adhesive 5 is applied. It may have a temporarily fixed shape part (through hole 10) for preventing movement of the sheet member (sheet lens 2) in between.
　上記の構成によれば、シート部材が撮像素子の上に配置されてから接着剤が塗布されるまでの間のシート部材の想定外の移動を防止することができる。 According to the above configuration, it is possible to prevent an unexpected movement of the sheet member after the sheet member is disposed on the imaging device and before the adhesive is applied.
　本発明の態様７に係るカメラモジュール１・１Ａは、上記態様６において、前記仮固定形状部（貫通孔１０）が、貫通孔又は凹部の少なくとも一方を含んでもよい。 In the camera module 1 / 1A according to aspect 7 of the present invention, in the above aspect 6, the temporarily fixed shape portion (through hole 10) may include at least one of a through hole or a recess.
　上記の構成によれば、簡単な構成で、シート部材の想定外の移動を防止することができる。 According to the above configuration, an unexpected movement of the sheet member can be prevented with a simple configuration.
　本発明の態様８に係るカメラモジュール１Ａは、上記態様１において、前記シート部材（シートレンズ２）の強度を補強するために、前記シート部材（シートレンズ２）の性能を有効に発揮する有効エリア６の外側に形成される補強部材１１をさらに備えてもよい。 The camera module 1A according to aspect 8 of the present invention is the effective area in which the performance of the sheet member (sheet lens 2) is effectively exhibited in order to reinforce the strength of the sheet member (sheet lens 2) in the above-mentioned aspect 1. You may further provide the reinforcement member 11 formed in the outer side of six.
　上記の構成によれば、シート部材の傾き、反り、変形が抑制される。 According to said structure, the inclination of the sheet | seat member, curvature, and a deformation | transformation are suppressed.
　本発明の態様９に係るカメラモジュール１・１Ａは、上記態様１において、前記シート部材（シートレンズ２）が光学部品を含んでもよい。 In the camera module 1 / 1A according to aspect 9 of the present invention, in the above aspect 1, the sheet member (sheet lens 2) may include an optical component.
　本発明の態様１０に係るカメラモジュール１・１Ａは、上記態様９において、前記光学部品がシートレンズを含んでもよい。 In the camera module 1 / 1A according to aspect 10 of the present invention, in the above aspect 9, the optical component may include a sheet lens.
　本発明の態様１１に係るカメラモジュールの製造方法は、基板の上に撮像素子３を搭載する搭載工程と、前記撮像素子３の上にシート部材（シートレンズ２）を配置する配置工程と、前記シート部材（シートレンズ２）を前記撮像素子３の上面に固定するために、前記シート部材（シートレンズ２）の上面と前記撮像素子３の上面とを跨ぐように接着剤５を塗布する塗布工程とを包含する。 The method for manufacturing a camera module according to aspect 11 of the present invention includes a mounting step of mounting the imaging device 3 on a substrate, an arranging step of arranging a sheet member (sheet lens 2) on the imaging device 3, and In order to fix a sheet member (sheet lens 2) to the upper surface of the imaging device 3, an application step of applying an adhesive 5 so as to straddle the upper surface of the sheet member (sheet lens 2) and the upper surface of the imaging device 3 And.
　本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。さらに、各実施形態にそれぞれ開示された技術的手段を組み合わせることにより、新しい技術的特徴を形成することができる。 The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.
　１　カメラモジュール
　２　シートレンズ（シート部材、光学部品）
　３　撮像素子
　４　接着剤トラップ溝（侵入防止部、溝部）
　５　接着剤
　６　有効エリア
　７　マイクロレンズ
　８　侵入防止壁（侵入防止部、壁部）
　９　塗布エリア（塗布部）
１０　貫通孔（仮固定形状部）
１１　補強部材 1 camera module 2 sheet lens (sheet member, optical component)
3 image sensor 4 adhesive trap groove (intrusion prevention portion, groove portion)
5 Adhesive 6 Effective Area 7 Micro Lens 8 Intrusion Prevention Wall (Intrusion Prevention Unit, Wall)
9 Application area (application section)
10 Through hole (temporarily fixed shape part)
11 Reinforcement member

Claims (11)

  1. 　基板の上に搭載された撮像素子と、
    　前記撮像素子の上に配置されたシート部材と、
    　前記シート部材を前記撮像素子の上面に固定するために、前記シート部材の上面と前記撮像素子の上面とを跨ぐように塗布された接着剤とを備えることを特徴とするカメラモジュール。     An imaging device mounted on a substrate;
    A sheet member disposed on the imaging device;
    A camera module comprising: an adhesive applied so as to straddle the upper surface of the sheet member and the upper surface of the image sensor in order to fix the sheet member to the upper surface of the image sensor.
  2. 　前記シート部材が、前記シート部材の性能を有効に発揮する有効エリアへの前記接着剤の侵入を防止するために前記シート部材の下面と上面との少なくとも一方に形成された侵入防止部を有する請求項１に記載のカメラモジュール。 The sheet member has an intrusion preventing portion formed on at least one of the lower surface and the upper surface of the sheet member in order to prevent the adhesive from invading the effective area in which the performance of the sheet member is effectively exhibited. The camera module according to Item 1.
  3. 　前記侵入防止部が、溝部と非平滑面部との少なくとも一方を含む請求項２に記載のカメラモジュール。 The camera module according to claim 2, wherein the intrusion prevention portion includes at least one of a groove portion and a non-smooth surface portion.
  4. 　前記シート部材が、前記シート部材の性能を有効に発揮する有効エリアへの前記接着剤の侵入を防止するために前記シート部材の上面に形成された侵入防止部と、前記接着剤を塗布するために前記侵入防止部に対して前記有効エリアの反対側に設けられた塗布部とを有する請求項１に記載のカメラモジュール。 In order to apply the adhesive, an intrusion preventing portion formed on the upper surface of the sheet member in order to prevent the adhesive from invading the effective area where the sheet member effectively exerts the performance of the sheet member The camera module according to claim 1, further comprising: an application unit provided on the opposite side of the effective area with respect to the intrusion prevention unit.
  5. 　前記侵入防止部が、壁部と溝部と非平滑面部との少なくとも一つを含む請求項４に記載のカメラモジュール。 The camera module according to claim 4, wherein the intrusion prevention portion includes at least one of a wall portion, a groove portion, and a non-smooth surface portion.
  6. 　前記シート部材が、前記撮像素子の上に配置されてから前記接着剤が塗布されるまでの間の前記シート部材の移動を防止するための仮固定形状部を有する請求項１に記載のカメラモジュール。 The camera module according to claim 1, wherein the sheet member has a temporarily fixed shape portion for preventing movement of the sheet member from being disposed on the image pickup element to when the adhesive is applied. .
  7. 　前記仮固定形状部が、貫通孔又は凹部の少なくとも一方を含む請求項６に記載のカメラモジュール。 The camera module according to claim 6, wherein the temporarily fixed shape portion includes at least one of a through hole or a recess.
  8. 　前記シート部材の強度を補強するために、前記シート部材の性能を有効に発揮する有効エリアの外側に形成される補強部材をさらに備える請求項１に記載のカメラモジュール。 The camera module according to claim 1, further comprising: a reinforcing member formed outside an effective area that effectively exerts the performance of the sheet member in order to reinforce the strength of the sheet member.
  9. 　前記シート部材が光学部品を含む請求項１に記載のカメラモジュール。 The camera module according to claim 1, wherein the sheet member includes an optical component.
  10. 　前記光学部品がシートレンズを含む請求項９に記載のカメラモジュール。 The camera module according to claim 9, wherein the optical component comprises a sheet lens.
  11. 　基板の上に撮像素子を搭載する搭載工程と、
    　前記撮像素子の上にシート部材を配置する配置工程と、
    　前記シート部材を前記撮像素子の上面に固定するために、前記シート部材の上面と前記撮像素子の上面とを跨ぐように接着剤を塗布する塗布工程とを包含することを特徴とするカメラモジュールの製造方法。     A mounting step of mounting the imaging device on the substrate;
    An arranging step of arranging a sheet member on the imaging device;
    An application step of applying an adhesive so as to straddle the upper surface of the sheet member and the upper surface of the image pickup element in order to fix the sheet member to the upper surface of the image pickup element; Production method.
PCT/JP2018/015638 2017-06-30 2018-04-16 Camera module and method for manufacturing camera module WO2019003580A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100804A (en) * 1981-12-11 1983-06-15 Matsushita Electric Ind Co Ltd Solid-state image pickup device
JP2006005029A (en) * 2004-06-15 2006-01-05 Fujitsu Ltd Imaging device and its manufacturing method
JP2011165775A (en) * 2010-02-05 2011-08-25 Canon Inc Solid-state imaging device and method of manufacturing the same
JP2013046353A (en) * 2011-08-26 2013-03-04 Ricoh Co Ltd Manufacturing method and manufacturing device of imaging apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100804A (en) * 1981-12-11 1983-06-15 Matsushita Electric Ind Co Ltd Solid-state image pickup device
JP2006005029A (en) * 2004-06-15 2006-01-05 Fujitsu Ltd Imaging device and its manufacturing method
JP2011165775A (en) * 2010-02-05 2011-08-25 Canon Inc Solid-state imaging device and method of manufacturing the same
JP2013046353A (en) * 2011-08-26 2013-03-04 Ricoh Co Ltd Manufacturing method and manufacturing device of imaging apparatus

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