JP2005353810A - Photodetector, range finder, camera module and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photodetector which is contained in a recess in which light receiving elements are hermetically sealed, a range finder using such a photodetector, a camera module, and a manufacturing method thereof. <P>SOLUTION: A photodetector (1) comprises a substrate (2), a holder (3) having an outer peripheral wall, and a box (6) formed inside with a recess (5). A light receiving element (8) such as a line sensor or the like is contained in the recess (5). A cover glass (4) which clogs the opening (5a) of the recess (5) is attached to the upper edge of the outer peripheral wall of the holder (3). When this takes place, the rise of an atmospheric pressure inside the recess (5) is avoided by the function of an air hole (9) provided in the holder (3). A circumferential side wall (4a) of the cover glass (4) is covered with a light shielding tape (10), whereby the entrance of unwanted lights is intercepted and the air hole (9) is closed by the light shielding tape (10), thereby keeping the recess (5) airtight. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light receiving device in which a light receiving element is covered with a package, a distance measuring device using such a light receiving device, a camera module, and a manufacturing method thereof.

  Conventionally, various light receiving devices incorporating line sensors and area sensors are incorporated in distance measuring devices and camera modules. Such a light receiving device generally has a configuration in which these light receiving elements are housed in a package in order to protect the light receiving elements such as a line sensor and an area sensor.

  FIG. 1 is a vertical cross-sectional view of the solid-state imaging device 57 disclosed in Patent Document 1, and an external lead 53a extends from the outer bottom surface to a long hole 52 that penetrates the bottom surface of the recess 51 formed in the envelope 50. FIG. The lead frame 53 is hermetically fixed so as to be protruded, and the solid-state image sensor 54 connected to the internal lead 53b of the lead frame 53 and the bonding wire 56 is accommodated in the recess 51, and further, the outer periphery is enclosed so as to close the recess 51 The optical window plate 55 is hermetically fixed to the container 50. In this way, the light receiving element such as the solid-state imaging element 54 is accommodated in the recess 51, and then the recess 51 is closed by the transparent plate (optical window plate 55).

  Here, when the transparent plate 55 for closing the recess 51 is attached, if the transparent plate 55 is placed on the upper side of the recess 51 without taking any measures and the recess 51 is closed, the internal pressure of the recess 51 Sometimes went up.

  Patent Document 2 discloses a method for manufacturing a solid-state imaging device for the purpose of avoiding such an increase in internal pressure of the recess 51. FIG. 2 is an explanatory view in which a part of the solid-state imaging device 60 manufactured by the method described in Patent Document 2 is broken. In this state, a transparent plate (seal glass) 66 is placed on and bonded to the upper surface of the package 61 coated with the resin 65. By adopting such a manufacturing method, when the transparent plate (seal glass) 66 is placed, the air in the recess 62 is exhausted from the through hole 64, so that an increase in atmospheric pressure in the recess 62 is avoided.

  After the pressure increase in the recess 62 is avoided and the transparent plate (seal glass) 66 is joined, the through hole 64 is filled with resin so as to keep the recess 62 in an airtight state. The envelope 50 of the solid-state imaging device 57 described in Patent Document 1 shown in FIG. 1 is also provided with a long hole 52 for extending the external lead 53a of the lead frame 53 from the outer bottom surface. This long hole 52 is also an adhesive. No. 67 is filled so that the airtight state of the recess 51 is maintained.

JP-A-8-274289 JP 2000-150844 A

  However, the solid-state imaging devices 57 and 60 described in Patent Document 1 and Patent Document 2 have the following disadvantages. That is, both of them go through a dedicated process of closing the hole leading to the recess with a resin (adhesive) in the manufacturing process, but it is very difficult to adjust the injection amount of the resin. That is, if the injection amount of the resin is too small, the hole cannot be completely closed and the inside of the recess cannot be kept airtight. On the other hand, if the amount of injected resin is too large, the resin enters the recess, which is a problem.

  Furthermore, the conventional solid-state imaging device has the following other problems. That is, unnecessary light that should not be received may enter from the outer peripheral side surface (for example, the side surface of FIG. 2) of the transparent plate that closes the recess. When such unnecessary light is received by a light receiving element such as an imaging element, there is a problem that an error may be included in image data.

  Therefore, the present invention can hold a recess of a light receiving device in an airtight state without filling an air hole with a resin, and a light receiving device, a distance measuring device, and a camera module in which a light receiving element does not receive unnecessary light. It is another object of the present invention to provide a manufacturing method thereof.

  In order to achieve the above object, a light receiving device of the present invention includes a box having a recess, a light receiving element accommodated in the recess, and a transparent member that closes the opening of the recess, The box is provided with an air hole that communicates the outside of the box with the inside of the recess, and the outer peripheral side surface of the transparent member and the air hole are covered with a light shielding tape. Item 1).

  If the air hole is covered with the light shielding tape in this way, the concave portion can be kept airtight, and unnecessary light entering from the outer peripheral side surface of the transparent member can be blocked. Here, in order to keep the concave portion in an airtight state, the light shielding tape has a property of shutting off air at least for use in closing the air hole.

In the light receiving device having the above-described configuration, the box may be configured by a substrate and a cylindrical first holder attached on the substrate (Claim 2).
With such a configuration, the first holder can be mounted on the substrate after the light receiving element is mounted on the substrate, and the light receiving element is mounted on the substrate, that is, the box, rather than the case where the substrate and the first holder are integrally formed. It can be easily mounted in the concave portion of the, and the assemblability is improved.

  Furthermore, in the light receiving device having the above-described configuration, a connection member connected to the light receiving element can be led out to the outside of the box through the air hole. In the light receiving device, a contact hole may be provided in the box in order to electrically connect the light receiving element accommodated in the recess and an element, device, or the like located outside the light receiving device. Therefore, in the present invention, the air hole provided for preventing the increase in the internal pressure of the recess is also used as a contact hole. Here, the connecting member may be a metal pattern, a lead frame, or a lead wire. Further, the light receiving element accommodated in the recess and these connecting members can be electrically connected by wire bonding, flip chip or the like.

  In the light receiving device as described above, the light receiving element may be a line sensor or an area sensor. In this way, the light receiving device of the present invention can be used for a distance measuring device and a camera module as will be described later.

  Next, the distance measuring device of the present invention includes the light receiving element and a second holder that holds the lens and is placed on the upper surface of the transparent member (Claim 5).

  The present invention provides a distance measuring device using the light receiving device according to claims 1 to 4. With such a configuration, the distance measuring device having the characteristics of the light receiving device can be obtained. That is, such a distance measuring device can keep the inside of the recess airtight, and can block unnecessary light entering from the outer peripheral side surface of the transparent member.

  Next, the camera module of the present invention includes the light receiving device and a second holder that holds a lens and is disposed at a position where a subject image can be formed on the light receiving element via the lens. (Claim 6).

  According to the present invention, a camera module is configured using the light receiving device according to any one of claims 1 to 4. With such a configuration, a camera module having the characteristics of the light receiving device can be obtained. That is, such a distance measuring device can keep the inside of the concave portion in an airtight state and can block unnecessary light from entering from the outer peripheral side surface of the transparent member.

The light receiving device manufacturing method of the present invention includes a step of mounting a light receiving element in a concave portion of a box body provided with an air hole in advance, and a step of bonding a transparent member to the box body so as to close the opening of the concave portion. The method further comprises a step of covering the outer peripheral side surface of the transparent member with a light shielding tape, and a step of closing the air hole with the light shielding tape.
According to the manufacturing method of the present invention, a light receiving device can be manufactured efficiently. Furthermore, the position where the air hole is provided is a position close to the transparent member, and a light shielding tape having a width capable of covering the outer peripheral side surface and the air hole of the transparent member is used. Complete the hole closure.
Next, in the method of manufacturing a distance measuring device according to the present invention, a step of mounting a light receiving element on a substrate, and a cylindrical first holder previously provided with an air hole are bonded onto the substrate so as to surround the light receiving element. A step of adhering a transparent member to the upper edge of the first holder, closing the opening of the first holder, and a step of adhering the second holder holding the lens to the upper surface of the transparent member; The method further comprises a step of covering the outer peripheral side surface of the transparent member with a light shielding tape, and a step of closing the air hole with the light shielding tape.

  According to the manufacturing method of the present invention, a distance measuring device can be manufactured efficiently. Here, the position where the air hole is provided is a position close to the transparent member, and a light shielding tape having a width capable of covering the outer peripheral side surface and the air hole of the transparent member is used, and the outer peripheral side surface of the transparent member is covered in one step, It is possible to complete the closing of the air hole. A distance measuring device manufactured by such a manufacturing method has a configuration in which a second holder holding a lens is attached to the upper part of the light receiving device. The distance measuring device is configured to cover the outer peripheral side surface of the transparent member with a light shielding tape or the air. If the adhesive portion of each component is covered with the light shielding tape at the same time when the hole is closed with the light shielding tape, the adhesion portion can be reinforced. In addition, since the first holder is bonded to the substrate after the light receiving device is mounted on the substrate, the light receiving device can be easily mounted on the substrate.

  According to another aspect of the present invention, there is provided a method for manufacturing a distance measuring device, the step of drilling an air hole communicating with the outside of the box and the inside of the recess in the outer peripheral wall of the box formed with the recess, Providing a connection member on the substrate, mounting the light receiving element on the substrate, connecting the connection member and the light receiving element, bonding a transparent member to the upper edge of the outer peripheral wall, and A step of closing the opening, a step of adhering the second holder holding the lens to the upper surface of the transparent member, a step of covering the outer peripheral side surface of the transparent member with a light shielding tape, and closing the air hole with the light shielding tape And a step of performing (step 9).

  According to the manufacturing method of the present invention, it is possible to efficiently manufacture a distance measuring device that functions an air hole as a contact hole in which a connection member is provided.

  The method for manufacturing a camera module of the present invention includes a step of mounting an image sensor on a substrate, a step of adhering a cylindrical first holder provided with air holes in advance on the substrate so as to surround the image sensor, Bonding a transparent member to the upper edge of the first holder to close the opening of the first holder, and forming a subject image on the image sensor through the lens through the second holder holding the lens It has the process of arrange | positioning in the possible position, The process of coat | covering the outer peripheral side surface of the said transparent member with a light shielding tape, The process of obstruct | occluding the said air hole with a light shielding tape, It is characterized by the above-mentioned.

  According to the manufacturing method of the present invention, a camera module can be manufactured efficiently. Here, the position where the air hole is provided is a position close to the transparent member, and a light shielding tape having a width capable of covering the outer peripheral side surface and the air hole of the transparent member is used, and the outer peripheral side surface of the transparent member is covered in one step, It is possible to complete the closing of the air hole. A camera module manufactured by such a manufacturing method has a configuration in which a second holder that holds a lens is attached to the upper part of the light receiving device, and when the outer peripheral side surface of the transparent member is covered with a light shielding tape or the air hole If the adhesive portion of each component is covered with the light shielding tape at the same time when the substrate is closed with the light shielding tape, the adhesive portion is also reinforced. In addition, since the first holder is bonded to the substrate after the imaging device is mounted on the substrate, the imaging device can be easily mounted on the substrate.

  According to another method of manufacturing the camera module of the present invention, there is provided a step of forming an air hole communicating the outside of the box and the recess in an outer peripheral wall of the box formed with the recess, and the connection to the air hole A step of providing a member, a step of mounting an image sensor on the substrate, a step of connecting the connection member and the image sensor, a transparent member is bonded to the upper edge of the outer peripheral wall, and the opening of the recess A step of disposing a second holder holding a lens at a position where a subject image can be formed on the imaging element via the lens, and a step of covering the outer peripheral side surface of the transparent member with a light shielding tape And a step of closing the air hole with a light shielding tape (claim 11).

  According to the manufacturing method of the present invention, a camera module that allows an air hole to function as a contact hole for providing a connection member can be efficiently manufactured.

  According to the present invention, since the light shielding tape is used instead of the resin for closing the air holes and contact holes, it is not necessary to adjust the amount of resin filled in the air holes and contact holes. Further, since the outer peripheral side surface of the transparent member is also covered with the light shielding tape, unnecessary light intrusion can be prevented.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 3 is a perspective view of the light receiving device 1 according to the first embodiment. FIG. 4 is a perspective view of the light receiving device 1 disassembled into a substrate 2, a holder 3, and a cover glass 4. 5 is a cross-sectional view taken along line AA in FIG.

  Here, the holder 3 as the first holder is an annular (cylindrical) frame body as shown in FIG. 4, and a box body in which the concave portion 5 is formed inside as shown in FIG. 5 when combined with the substrate 2. 6 is formed. That is, the holder 3 constitutes the outer peripheral wall 7 of the box 6.

  As shown in FIG. 4, a line sensor 8 which is a kind of light receiving element is mounted on the substrate 2. The line sensor 8 is a box formed by combining the substrate 2 and the holder 3 as described above. It is accommodated in a recess 5 formed inside the body 6.

  The cover glass 4 is placed on the outer peripheral wall 7, that is, the upper edge 3 a of the holder 3, and the opening 5 a of the recess 5 is closed. This cover glass 4 corresponds to a transparent plate as a transparent member in the present invention. Further, the outer peripheral wall 7 is provided with an air hole 9 that communicates the outside of the box 6 and the inside of the recess 5.

  The substrate 2, the holder 3, and the cover glass 4 as described above are overlapped in the order shown in FIG. 4, and the substrate 2 and the holder 3, and the holder 3 and the cover glass 4 are bonded to each other to close the air holes 9 and cover the cover. A light-shielding tape 10 is affixed so as to cover the outer peripheral side surface 4 a of the glass 4 to constitute the light-receiving device 1. Here, when the cover glass 4 is placed and bonded, the light receiving device 1 can avoid an increase in atmospheric pressure in the recess 5 because the air in the recess 5 is discharged from the air hole 9. After the cover glass 4 is bonded, the air hole 9 is closed with the light shielding tape 10 to ensure the airtight state in the recess 5. Further, unnecessary light does not enter from the outer peripheral side surface 4 a of the cover glass 4 or the air holes 9.

  Here, the light shielding tape 10 is composed of a base material such as acetate cloth or polyester and an adhesive material such as rubber or acrylic. The material of the light shielding tape 10 is not limited to the above as long as it has light shielding properties and airtightness, and can be appropriately changed.

  Further, the width of the light shielding tape 10 was set to a width that can cover the upper edge 4a1 of the outer peripheral side surface 4a of the cover glass 4 to the lower side (substrate 2 side) than the bonding portion between the substrate 2 and the holder 3. Thereby, the outer peripheral side surface 4 a of the cover glass 4 can be completely covered and the air hole 9 can be blocked, and the joint portion between the substrate 2 and the holder 3 and the holder 3 and the cover glass 4 can be reinforced. In addition, since the holder 3 can be bonded to the substrate 2 after the line sensor 8 is mounted on the substrate 2, the line sensor 8 is easily mounted in the recess 5 as compared with a box in which the substrate 2 and the holder 3 are integrally formed. it can.

  The light receiving device 1 configured as described above can constitute a distance measuring device or the like by attaching a second holder which is a cylindrical body holding a lens on the upper side of the cover glass 4. In this embodiment, a line sensor is used as the light receiving element. However, a light receiving device having the same configuration can be configured using another element, for example, an area sensor. Further, if an image sensor is used as the light receiving device, it can be a component of the camera module.

  Next, a second embodiment of the light receiving device will be described. FIG. 6 is a perspective view of the light receiving device 11 according to the second embodiment. 7A is an exploded perspective view of the substrate 12 constituting the light receiving device 11, the holder 13 as the first holder, and the cover glass 4, and FIG. 7B is a bottom view of the substrate 12. It is. 8 is a cross-sectional view taken along line BB in FIG.

  The light receiving device 11 of the second embodiment is different from the light receiving device 1 of the first embodiment in that a metal pattern 17 as a connecting member connected to the substrate 12 by a line sensor 15 and a wire bonding 16 is applied. A groove 18 for forming a contact hole 19 when the holder 13 and the substrate 12 are joined is provided on the lower end surface of the holder 13. The metal pattern 17 wraps around to the bottom side of the substrate 12 as shown in FIG.

  With this configuration, the line sensor 15 mounted on the substrate 12 can be connected to an external circuit (not shown). At this time, the contact hole 19 also has a function as an air hole. Therefore, the light receiving device 11 includes the metal pattern 17 and the wire bonding 16 except that the contact hole 19 is closed with the light shielding tape 10 and the outer peripheral side surface 4a of the cover glass 4 is covered. The configuration is the same as that of the light receiving device 1. Therefore, the description of the same configuration as the first embodiment is omitted. Also in this embodiment, the line sensor 15 can be changed to another element such as an area sensor.

  In this embodiment, the wire bonding 16 is used for the connection between the metal pattern 17 and the line sensor 15, but a connection using a flip chip or the like may be used. Further, a lead frame may be used instead of the metal pattern 17.

  Next, an embodiment of the distance measuring device of the present invention will be described. FIG. 9 is a perspective view of the distance measuring device 20, and FIG. 10 is a cross-sectional view taken along the line CC in FIG. 9. This distance measuring device 20 is a pair of lenses on the upper side of the light receiving device 1 of the first embodiment. The second holder 21, which is a cylinder holding 22, is attached.

  However, in the light receiving device 1 of Example 1, the upper edge of the light shielding tape 10 is made to coincide with the upper edge 4a1 of the outer peripheral side surface 4a of the cover glass 4 as shown in FIG. This is different in that a light shielding tape 10 'having a width that covers the upper side of the upper edge 4a1 of the outer peripheral side surface 4a (joint portion between the cover glass 4 and the second holder 21) is used. If such a light shielding tape 10 ′ is used, the joint portion between the second holder 21 and the light receiving device 1 is reinforced.

  Further, since the light receiving device 1 is used for the distance measuring device 20, the line sensor 8 employs a pair of line-shaped light receiving portions 8a separated by a base line length L as shown in FIG. ing. Correspondingly, the lens 22 held by the second holder 21 is also attached with a distance of the base line length L.

  A method of manufacturing the distance measuring device 20 configured as described above will be described with reference to FIG. The same constituent elements as those of the light receiving device 1 of the first embodiment are described with the same reference numerals.

(1) First, a light receiving element, that is, a line sensor 8 is mounted on the substrate 2 and necessary wiring is performed. Apart from this, as shown in FIG. 11, a holder 3 which is an annular (tubular) frame body provided with air holes 9 at two locations is prepared. This holder 3 corresponds to the first holder of the present invention.
(2) Next, the holder 3 is bonded to the upper surface of the substrate 2 so as to surround the line sensor 8 to form a recess 5 for accommodating the line sensor 8 as shown in FIG.
(3) Next, a cover glass 4 that is a transparent plate (transparent member) is placed on and bonded to the upper edge of the holder 3. Thereby, the opening part 5a of the recessed part 5 is obstruct | occluded. At this time, since the air in the recess 5 is exhausted from the air hole 9, it is avoided that the pressure in the recess 5 rises. In addition, when setting it as the light-receiving device 1 of Example 1, the light-receiving device 1 will be completed if the light shielding tape 10 is stuck at this stage.
(4) After closing the opening 5 a of the recess 5 with the cover glass 4, the second holder 21, which is a cylindrical body holding a pair of lenses 22 on the top, is placed on the upper surface of the cover glass 4 and bonded.
(5) Next, a light shielding tape 10 'having a width that covers from the lower side of the joined portion between the substrate 2 and the holder 3 to the upper side of the joined portion between the cover glass 4 and the second holder 21 is applied along the outer peripheral surface. If the air hole 9 is closed and the outer peripheral side surface 4a of the cover glass 4 is covered, the distance measuring device 20 is completed.

  According to the above process, the process of obstruct | occluding the air hole 9 and the process of coat | covering the outer peripheral side surface 4a of the cover glass 4 can be performed by one process. Further, the joint portion of each element can be reinforced at the same time. In addition, since the holder 3 is bonded to the substrate 2 after the line sensor 8 is mounted on the substrate 2, the line sensor 8 can be easily mounted on the substrate 2.

Next, another embodiment of the distance measuring apparatus of the present invention will be described. 12 is a perspective view of the distance measuring device 23, and FIG. 13 is a cross-sectional view taken along the line DD in FIG. The distance measuring device 23 is different from the distance measuring device 20 of the third embodiment in that the distance measuring device 20 has the substrate 2 and the holder 3 in the light receiving device portion with the second holder 21 removed as shown in FIG. Are combined with each other to form a box body having a recess 5. However, in the distance measuring device 23 of this embodiment, as shown in FIG. The wall 24b is integrated with the box 24 in which the recess 25 is formed in advance.
Another difference is that a plurality of contact holes 26 are provided in the outer peripheral wall 24 b and a metal pattern 27 is provided over the inside and outside of the box body 24 through the contact holes 26. FIG. 14B is a bottom view of the box body 24, but the metal pattern 27 wraps around to the bottom surface side of the box body 24. Furthermore, as shown in FIG. 15, the line sensor 15 housed in the recess 25 and the metal pattern 27 are connected by wire bonding 28.

  That is, the light receiving device portion of the distance measuring device 23 of the present embodiment has the same configuration as the assembled light receiving device 11 of the second embodiment, and a pair of lenses 22 similar to that of the third embodiment is provided on such a light receiving device. The second holder 21 which is a held cylinder is attached. Note that the description of the same configuration as that of the third embodiment is omitted.

  With such a configuration, the line sensor 15 mounted on the substrate 24a of the box 24 can be connected to an external circuit (not shown). The contact hole 26 also has a function as an air hole.

  In addition, the line sensor 15 to which the wire bonding 28 is connected includes a pair of line-shaped light receiving portions 15a that are separated by a base line length L as in the line sensor 8 of the third embodiment.

  A method of manufacturing the distance measuring device 23 configured as described above will be described with reference to FIGS.

(1) First, a plurality of contact holes 26 are formed in the outer peripheral wall 24b of the box body 24 provided with the substrate 24a and the outer peripheral wall 24b as shown in FIG. deep. The contact hole 26 also has a function as an air hole.
(2) Next, a connection member is provided in the contact hole 26. In the present embodiment, a metal pattern 27 extending inside and outside the box body 24 is applied.
(3) After the metal pattern 27 is applied, the line sensor 15 is mounted on the substrate 24 a so that the line sensor 15 is accommodated in the recess 25. Thereafter, the line sensor 15 and the metal pattern 27 are connected by wire bonding 28.
(4) Next, a cover glass 4 that is a transparent plate (transparent member) is placed on and bonded to the upper edge of the box 24. Thereby, the opening part 25a of the recessed part 25 is obstruct | occluded. At this time, since the air in the recess 25 is exhausted by the contact hole 26 functioning as an air hole, an increase in the atmospheric pressure in the recess 25 is avoided. Further, at this stage, a light shielding tape is applied to close the contact hole 26 and cover the peripheral side wall 4a of the cover glass 4 to obtain the light receiving device of the present invention.
(5) After closing the opening 25 a of the recess 25 with the cover glass 4, the second holder 21, which is a cylindrical body holding the lens 22 on the top, is placed on the upper surface of the cover glass 4 and bonded.
(6) Next, a light shielding tape 10 ″ having a width covering from the lower side of the contact hole 26 to the upper side of the joint portion between the cover glass 4 and the second holder 21 is applied along the outer peripheral surface to close the contact hole 26. If the outer peripheral side surface 4a of the cover glass 4 is covered, the distance measuring device 23 is completed.

  According to the above steps, the step of closing the contact hole 26 having the function of an air hole and the step of covering the outer peripheral side surface 4a of the cover glass 4 can be performed in one step. Further, the joint portion of each element can be reinforced at the same time. The connecting member is not limited to a metal pattern, and may be a lead frame.

  Next, an embodiment of the camera module of the present invention will be described. 16 is a perspective view of the camera module 30, and FIG. 17 is a cross-sectional view taken along line EE in FIG. The basic configuration of the camera module 30 is a configuration in which a lens 32 is held on the upper side of the light receiving device 1 of the first embodiment and a second holder 31 that is a cylindrical body with a shutter device 33 is attached. . However, instead of the line sensor 8 of the light receiving device 1 of the first embodiment, an area sensor 34 serving as an image sensor is mounted. Further, in the light receiving device 1 of Example 1, the upper edge of the light shielding tape 10 is made to coincide with the upper edge 4a1 of the outer peripheral side surface 4a of the cover glass 4 as shown in FIG. This is different in that a light shielding tape 10 ′ is used which covers up to the upper side of the upper edge 4 a 1 (joint portion between the cover glass 4 and the second holder 31). If such a light shielding tape 10 ′ is used, the joint portion between the second holder 31 and the light receiving device 1 is reinforced.

  A method for manufacturing the camera module 30 configured as described above will be described with reference to FIG. The same components as those of the light receiving device 1 of the first embodiment are described with the same reference numerals.

(1) First, an image sensor, that is, an area sensor 34 is mounted on the substrate 2 and necessary wiring is performed. Separately, as shown in FIG. 18, a holder 3 that is an annular (tubular) frame body provided with air holes 9 at two locations is prepared. This holder 3 corresponds to the first holder of the present invention.
(2) Next, the holder 3 is bonded to the upper surface of the substrate 2 so as to surround the area sensor 34, thereby forming the recess 5 for accommodating the area sensor 34 as shown in FIG. 17.
(3) Next, a cover glass 4 that is a transparent plate (transparent member) is placed on and bonded to the upper edge of the holder 3. Thereby, the opening part 5a of the recessed part 5 is obstruct | occluded. At this time, since the air in the recess 5 is exhausted from the air hole 9, it is avoided that the pressure in the recess 5 rises.
(4) After closing the opening 5 a of the recess 5 with the cover glass 4, the lens 32 is held on the upper part, and the second holder 31, which is a cylinder with the shutter device 33 assembled in advance, is attached to the cover glass 4. Place on top and bond. At this time, the second holder is disposed at a position where a subject image can be formed on the area sensor 34 via the lens 32.
(5) Next, a light shielding tape 10 'having a width covering the lower side of the joint portion between the substrate 2 and the holder 3 to the upper side of the joint portion between the cover glass 4 and the second holder 31 is applied along the outer peripheral surface. If the air hole 9 is closed and the outer peripheral side surface 4a of the cover glass 4 is covered, the camera module 30 is completed.

  According to the above process, the process of obstruct | occluding the air hole 9 and the process of coat | covering the outer peripheral side surface 4a of the cover glass 4 can be performed by one process. Further, the joint portion of each element can be reinforced at the same time. Further, since the holder 3 is bonded to the substrate 2 after the area sensor 34 is mounted on the substrate 2, the area sensor 34 can be easily mounted on the substrate 2. In this embodiment, the shutter device 33 is provided, but the shutter device may not be provided. Moreover, although it was set as the structure which mounts the 2nd holder 31 on the upper surface of the cover glass 4, the position of the 2nd holder 31 is not limited to this.

Next, another embodiment of the camera module of the present invention will be described. 19 is a perspective view of the camera module 35, and FIG. 20 is a cross-sectional view taken along line FF in FIG. The difference between the camera module 35 and the camera module 30 of the fifth embodiment is that, in the camera module 30, the substrate 2 and the holder 3 are separated from each other in the light receiving device portion with the second holder 31 removed as shown in FIG. The box body having the recess 5 is configured by combining the body, but in the camera module 35 of the present embodiment, as shown in FIG. 21A, a substrate (bottom surface) 36a and an outer peripheral wall 36b are provided. The point is that a box body 36 in which a concave portion 37 is formed in advance is used.
Another difference is that a plurality of contact holes 38 are provided in the outer peripheral wall 36 b and a metal pattern 39 is provided over the inside and outside of the box 36 through the contact holes 38. FIG. 21B is a bottom view of the box body 36, but the metal pattern 39 wraps around to the bottom surface side of the box body 36. Furthermore, as shown in FIG. 22, the area sensor 40 housed in the recess 37 and the metal pattern 39 are connected by wire bonding 41.

  That is, the light receiving device portion of the camera module 35 of the present embodiment has the same configuration as the assembled light receiving device 11 of the second embodiment, and holds the lens 32 similar to that of the fifth embodiment in such a light receiving device. The second holder 31 which is a cylindrical body in which the shutter device 33 is housed is attached. The description of the same configuration as that of the fifth embodiment is omitted.

  With such a configuration, the area sensor 40 mounted on the substrate 36a of the box 36 can be connected to an external circuit (not shown). At this time, the contact hole 38 also has a function as an air hole.

  A method for manufacturing the camera module 35 configured as described above will be described with reference to FIGS.

(1) First, a plurality of contact holes 38 are formed in the outer peripheral wall 36b of the box 36 having a substrate 36a and an outer peripheral wall 36b as shown in FIG. deep. The contact hole 38 also has a function as an air hole.
(2) Next, a connection member is provided in the contact hole 38. In the present embodiment, a metal pattern 39 extending inside and outside the box body 36 is applied.
(3) After the metal pattern 39 is applied, the area sensor 40 is mounted on the substrate 36 a so that the area sensor 40 is accommodated in the recess 37. Thereafter, the area sensor 40 and the metal pattern 39 are connected by wire bonding 41.
(4) Next, the cover glass 4 that is a transparent plate (transparent member) is placed on and bonded to the upper edge of the box 36. Thereby, the opening part 37a of the recessed part 37 is obstruct | occluded. At this time, since the air in the concave portion 37 is exhausted by the contact hole 38 functioning as an air hole, an increase in the atmospheric pressure in the concave portion 37 is avoided. At this stage, a light shielding tape is applied to close the contact hole 38 and cover the peripheral side wall 4a of the cover glass 4 to provide a light receiving device.
(5) After the opening 37a of the concave portion 37 is closed with the cover glass 4, the lens 32 is held on the upper portion, and the second holder 31 which is a cylindrical body with the shutter device 33 assembled in advance is attached to the cover glass 4. Place on top and bond.
(6) Next, a light shielding tape 10 ″ having a width covering from the lower side of the contact hole 38 to the upper side of the joint portion between the cover glass 4 and the second holder 31 is applied along the outer peripheral surface, thereby closing the contact hole 38. If the outer peripheral side surface 4a of the cover glass 4 is covered, the camera module 35 is completed.

According to the above steps, the step of closing the contact hole 38 having the function of an air hole and the step of covering the outer peripheral side surface 4a of the cover glass 4 can be performed in one step. Further, the joint portion of each element can be reinforced at the same time.
In this embodiment, the shutter device 33 is provided, but the shutter device may not be provided. Moreover, although the 2nd holder 31 was mounted in the upper surface of the cover glass 4, if the position of the 2nd holder 31 is a position which can image a to-be-photographed object image on the area sensor 40 via a lens, it can change suitably. . Further, the connecting member is not limited to a metal pattern.

  The above-described embodiments are merely examples for carrying out the present invention, and the present invention is not limited thereto. Various modifications of these embodiments are within the scope of the present invention. It is apparent from the above description that various other embodiments are possible within the scope.

It is a longitudinal cross-sectional view of the prior art example described in Patent Document 1. It is explanatory drawing which fractured | ruptured a part of prior art example of patent document 2. FIG. 1 is a perspective view of a light receiving device according to Embodiment 1. FIG. It is the perspective view which decomposed | disassembled the light-receiving device of FIG. 3 into the board | substrate, the holder, and the cover glass. It is sectional drawing of the light-receiving device made into the cross section by the AA line in FIG. 6 is a perspective view of a light receiving device according to Embodiment 2. FIG. (A) is the perspective view which decomposed | disassembled the light-receiving device of FIG. 6 into the board | substrate, the holder, and the cover glass, (b) is a bottom view of a board | substrate. It is sectional drawing of the light-receiving device made into the cross section by the BB line in FIG. It is a perspective view of the distance measuring device of Example 3. FIG. 10 is a cross-sectional view of the distance measuring device taken along line CC in FIG. 9. It is the perspective view which decomposed | disassembled the ranging apparatus of FIG. 9 into the board | substrate, the holder, the cover glass, and the 2nd holder. It is a perspective view of the distance measuring apparatus of Example 4. It is sectional drawing of the ranging device made into the cross section by the DD line | wire in FIG. (A) is the perspective view decomposed | disassembled into the box containing a board | substrate and a line sensor, (b) is a bottom view of a box. It is the perspective view which decomposed | disassembled the ranging apparatus of FIG. 12 into the box body, the cover glass, and the 2nd holder which mount a line sensor. FIG. 10 is a perspective view of a camera module according to Embodiment 5. It is sectional drawing of the camera module made into the cross section by the EE line in FIG. It is the perspective view which decomposed | disassembled the camera module of FIG. 16 into the board | substrate, the holder, the cover glass, and the 2nd holder. FIG. 10 is a perspective view of a camera module according to Embodiment 6. It is sectional drawing of the camera module made into the cross section by the FF line in FIG. (A) is the perspective view decomposed | disassembled into the box containing a board | substrate and an area sensor, (b) is a bottom view of a box. It is the perspective view which decomposed | disassembled the camera module of FIG. 19 into the box which mounts an area sensor, a cover glass, and a 2nd holder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11 Light-receiving device 2, 12, 24a, 36a Substrate 3, 13 Holder 4 Cover glass 4a Outer peripheral side 5, 25, 37 Recess 6, 24, 36 Box 7, 34b, 36b Outer wall 8, 15 Line sensor 9 Air Hole 10, 10 ′, 10 ″ Shading tape 16, 28, 41 Wire bonding 17, 27, 39 Metal pattern 18 Groove 19, 26, 38 Contact hole 20, 23 Distance measuring device 21, 31 Second holder 30, 35 Camera Module 34, 40 Area sensor

Claims (11)

A box with a recess,
A light receiving element housed in the recess;
A transparent member that closes the opening of the recess,
The box is provided with an air hole that communicates the outside of the box with the inside of the recess,
The light receiving device, wherein an outer peripheral side surface of the transparent member and the air hole are covered with a light shielding tape. The light receiving device according to claim 1, wherein the box is configured by a substrate and a cylindrical first holder attached on the substrate. The light receiving device according to claim 1, wherein a connection member connected to the light receiving element is led out of the box through the air hole. The light receiving device according to any one of claims 1 to 3, wherein the light receiving element is a line sensor or an area sensor. 5. A distance measuring device comprising: the light receiving device according to claim 1; and a second holder that holds a lens and is placed on an upper surface of the transparent member. 5. A light receiving device according to claim 1, and a second holder that holds a lens and is disposed at a position where a subject image can be formed on the light receiving element via the lens. A featured camera module. A step of mounting the light receiving element in the recess of the box provided with air holes in advance;
Bonding the transparent member to the box so as to close the opening of the recess;
Coating the outer peripheral side surface of the transparent member with a light shielding tape;
Clogging the air holes with a light shielding tape;
A method for manufacturing a light receiving device. Mounting the light receiving element on the substrate;
Adhering a cylindrical first holder provided with air holes on the substrate so as to surround the light receiving element;
Adhering a transparent member to the upper edge of the first holder, and closing the opening of the first holder;
Bonding the second holder holding the lens to the upper surface of the transparent member;
Coating the outer peripheral side surface of the transparent member with a light shielding tape;
Clogging the air holes with a light shielding tape;
A method of manufacturing a distance measuring device, comprising: Drilling an air hole communicating the outside of the box and the inside of the recess in the outer peripheral wall of the box in which the recess is formed;
Providing a connection member in the air hole;
Mounting a light receiving element on the substrate;
Connecting the connection member and the light receiving element;
Adhering a transparent member to the upper edge of the outer peripheral wall and closing the opening of the recess;
Bonding the second holder holding the lens to the upper surface of the transparent member;
Coating the outer peripheral side surface of the transparent member with a light shielding tape;
Clogging the air holes with a light shielding tape;
A method of manufacturing a distance measuring device, comprising: Mounting an image sensor on a substrate;
Adhering a cylindrical first holder provided with air holes in advance on the substrate so as to surround the imaging element;
Adhering a transparent member to the upper edge of the first holder, and closing the opening of the first holder;
Arranging a second holder holding a lens at a position where a subject image can be formed on the image sensor via the lens;
Coating the outer peripheral side surface of the transparent member with a light shielding tape;
Clogging the air holes with a light shielding tape;
A method for manufacturing a camera module, comprising: Drilling an air hole communicating the outside of the box and the inside of the recess in the outer peripheral wall of the box in which the recess is formed;
Providing a connection member in the air hole;
Mounting an image sensor on the substrate;
Connecting the connection member and the imaging device;
Adhering a transparent member to the upper edge of the outer peripheral wall and closing the opening of the recess;
Arranging a second holder holding a lens at a position where a subject image can be formed on the image sensor via the lens;
Coating the outer peripheral side surface of the transparent member with a light shielding tape;
Clogging the air holes with a light shielding tape;
A method for manufacturing a camera module, comprising:

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