JP2006332685A - Solid-state imaging device - Google Patents

Solid-state imaging device Download PDF

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JP2006332685A
JP2006332685A JP2006183566A JP2006183566A JP2006332685A JP 2006332685 A JP2006332685 A JP 2006332685A JP 2006183566 A JP2006183566 A JP 2006183566A JP 2006183566 A JP2006183566 A JP 2006183566A JP 2006332685 A JP2006332685 A JP 2006332685A
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rib
solid
imaging device
state imaging
housing
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JP4219943B2 (en
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Katsutoshi Shimizu
克敏 清水
Masanori Nano
匡紀 南尾
Koichi Yamauchi
浩一 山内
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/93—Batch processes
    • H01L24/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
    • H01L24/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
    • H01L2224/732—Location after the connecting process
    • H01L2224/73251—Location after the connecting process on different surfaces
    • H01L2224/73265—Layer and wire connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
    • H01L2924/161—Cap
    • H01L2924/1615—Shape
    • H01L2924/16195—Flat cap [not enclosing an internal cavity]

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Solid State Image Pick-Up Elements (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid-state imaging device having durability in which the junction between a rib and a transparent plate to be joined to the upper end surface of the rib is improved against a stress applied to the rib and the plate due to thermal deformation. <P>SOLUTION: The solid-state imaging device is provided with: a casing 1 obtained by integrally forming a substrate section 2 and the rectangular frame-like rib 3 with a resin; a plurality of metallic lead pieces 9 buried in the casing and each having an inner terminal portion 9a facing the internal space of the casing and an external terminal portion 9b exposed to the outside of the casing; an imaging element 5 fixed on the substrate in the internal space of the casing; metallic fine wires 10 each connecting an electrode of the imaging element to the internal terminal portion of a metallic lead piece; and a translucent plate 7 joined to the upper end surface of the rib. A low level portion lower along the external periphery is formed on the upper end surface of the rib, and an adhesive also exists on one part of the side face of the translucent plate by an adhesive material filled on at least the low level portion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ＣＣＤ等の撮像素子が筐体内に搭載された構成の固体撮像装置に関する。   The present invention relates to a solid-state imaging device having a configuration in which an imaging element such as a CCD is mounted in a casing.

固体撮像装置は、ビデオカメラやスチルカメラ等に広く用いられ、ＣＣＤ等の撮像素子を絶縁性材料からなる基台に搭載し、受光領域を透光板で覆ったパッケージの形態で提供される。装置の小型化のため、撮像素子は、ベアチップの状態で基台に搭載される。そのような固体撮像装置の従来例として、特許文献１に記載の固体撮像装置を図１０に示す。   Solid-state imaging devices are widely used in video cameras, still cameras, and the like, and are provided in the form of a package in which an imaging element such as a CCD is mounted on a base made of an insulating material and a light receiving area is covered with a light-transmitting plate. In order to reduce the size of the apparatus, the image sensor is mounted on the base in a bare chip state. As a conventional example of such a solid-state imaging device, a solid-state imaging device described in Patent Document 1 is shown in FIG.

図１０において、４１は筐体であり、樹脂モールドにより一体成形された基板部４１ａおよび枠状のリブ４１ｂからなり、その上面に内部空間４２が形成されている。筐体４１には、基板部４１ａの中央部に位置するダイパッド４３、およびリブ４１ｂの下部に位置するリード４４が埋め込まれている。内部空間４２の中央部に配置された撮像素子チップ４５は、ダイパッド４３の上面に固定されている。リード４４は、リブ４１ｂの内側の基板部４１ａ上面で内部空間４２に露出した内部端子部４４ａと、リブ４１ｂの下部において基板部４１ａ底面から露出した外部端子部４４ｂを有する。内部端子部４４ａと、撮像素子チップ４５のボンディングパッドとが、金属線からなるボンディングワイヤ４６によって接続されている。またリブ４１ｂの上端面に、透明なシールガラス板４７が接合されて、撮像素子チップ４５を保護するためのパッケージが形成されている。   In FIG. 10, reference numeral 41 denotes a housing, which includes a substrate portion 41a and a frame-like rib 41b integrally formed by a resin mold, and an internal space 42 is formed on the upper surface thereof. In the housing 41, a die pad 43 located at the center of the substrate portion 41a and a lead 44 located below the rib 41b are embedded. The image sensor chip 45 disposed in the central portion of the internal space 42 is fixed to the upper surface of the die pad 43. The lead 44 has an internal terminal portion 44a exposed to the internal space 42 on the upper surface of the substrate portion 41a inside the rib 41b, and an external terminal portion 44b exposed from the bottom surface of the substrate portion 41a below the rib 41b. The internal terminal portion 44a and the bonding pad of the image sensor chip 45 are connected by a bonding wire 46 made of a metal wire. In addition, a transparent sealing glass plate 47 is bonded to the upper end surface of the rib 41b to form a package for protecting the imaging element chip 45.

この固体撮像装置は、図示されたようにシールガラス板４７の側を上方にむけた状態で回路基板上に搭載され、外部端子部４４ｂが、回路基板上の電極と接続するために用いられる。図示しないが、シールガラス板４７の上部には、撮像光学系が組み込まれた鏡筒が、撮像素子チップ４５に形成された受光領域との相互位置関係を、所定精度に調整して装着される。撮像動作の際は、鏡筒に組み込まれた撮像光学系を通して、被撮像対象からの光が受光領域に集光され光電変換される。   This solid-state imaging device is mounted on a circuit board with the sealing glass plate 47 facing upward as shown in the figure, and the external terminal portion 44b is used for connecting to an electrode on the circuit board. Although not shown in the drawings, a lens barrel in which an imaging optical system is incorporated is mounted on the upper portion of the seal glass plate 47 with the mutual positional relationship with the light receiving area formed in the imaging element chip 45 adjusted to a predetermined accuracy. . During the imaging operation, the light from the imaging target is condensed and photoelectrically converted into the light receiving region through the imaging optical system incorporated in the lens barrel.

このような構造の固体撮像装置は、筐体底面に露出した外部端子部４４ｂにより回路基板上の電極と接続されるので、筐体の側面から下方に折れ曲がったアウターリードによる接続を用いた構造に比べて、パッケージの高さや占有面積が小さく、高密度実装に適している。   Since the solid-state imaging device having such a structure is connected to the electrode on the circuit board by the external terminal portion 44b exposed on the bottom surface of the housing, it has a structure using a connection by an outer lead bent downward from the side surface of the housing. In comparison, the package height and occupied area are small, and it is suitable for high-density mounting.

図１０の形状の筐体４１を樹脂モールドする際に、特許文献１では、図１１に示すような、上金型４８と下金型４９を用いる。下金型４９の上面は平坦である。上金型４８の下面には、リブ４１ｂに対応する凹部４８ａが形成されている。凹部４８ａの両側には、内部空間４２を形成する内側凸部４８ｂ、およびリブ４１ｂの外側面を形成する外側凸部４８ｃが設けられている。リード４４とダイパッド４３とは、リードフレーム５０として一体の状態で供給され、上金型４８と下金型４９の間に装着される。   When resin-molding the casing 41 having the shape shown in FIG. 10, in Patent Document 1, an upper mold 48 and a lower mold 49 as shown in FIG. 11 are used. The upper surface of the lower mold 49 is flat. A recess 48 a corresponding to the rib 41 b is formed on the lower surface of the upper mold 48. On both sides of the recess 48a, an inner protrusion 48b that forms the inner space 42 and an outer protrusion 48c that forms the outer surface of the rib 41b are provided. The lead 44 and the die pad 43 are supplied in an integrated state as the lead frame 50 and are mounted between the upper mold 48 and the lower mold 49.

上金型４８と下金型４９の間にリードフレーム５０が介在することにより、上金型４８の内側凸部４８ｂと下金型４９の間に、基板部４１ａをモールドするためのキャビティ５１が形成される。その状態で樹脂の充填を行い、金型を開いて成形体を取り出した状態で、筐体４１を形成する基板部４１ａおよびリブ４１ｂは完成された形状を有する。リードフレーム５０は、モールド後に、リブ４１ｂの外側に位置する部分が切断される。
特開２００１−７７２７７号公報 Since the lead frame 50 is interposed between the upper mold 48 and the lower mold 49, a cavity 51 for molding the substrate portion 41a is formed between the inner convex portion 48b of the upper mold 48 and the lower mold 49. It is formed. In this state, the resin is filled, the mold is opened and the molded body is taken out, and the substrate portion 41a and the rib 41b forming the housing 41 have a completed shape. The lead frame 50 is cut at a portion located outside the rib 41b after molding.
JP 2001-77277 A

上記従来例の固体撮像装置においては、シールガラス板４７は、リブ４１ｂの上端面との間に介在する僅かな量の接着材のみにより接合されている。リブ４１ｂの上端面の面積は小さいので、接合強度は弱い。また、接着材の層は薄いので、熱変形等に起因してシールガラス板４７とリブ４１ｂとの間に応力が作用した際に、接着材層において歪みを緩和する作用は小さく、両者の接合の耐久性は低い。   In the conventional solid-state imaging device, the sealing glass plate 47 is joined only by a slight amount of adhesive interposed between the upper end surface of the rib 41b. Since the area of the upper end surface of the rib 41b is small, the bonding strength is weak. In addition, since the adhesive layer is thin, when the stress acts between the sealing glass plate 47 and the rib 41b due to thermal deformation or the like, the adhesive layer has a small effect of reducing the strain, and the bonding between the two. Has low durability.

従って本発明は、リブとその上端面に配置される透明板の接合が、熱変形等に起因して両者間に作用する応力に対して高い耐久性を有する固体撮像装置を提供することを目的とする。   Accordingly, an object of the present invention is to provide a solid-state imaging device in which the bonding between the rib and the transparent plate disposed on the upper end surface thereof has high durability against the stress acting between both due to thermal deformation or the like. And

本発明の固体撮像装置は、基板部および矩形枠状のリブが樹脂により一体成形された筐体と、前記筐体に埋め込まれ、前記筐体の内部空間に面する内部端子部および前記筐体の外部に露出した外部端子部を各々有する複数本の金属リード片と、前記筐体の内部空間において前記基板部上に固定された撮像素子と、前記撮像素子の電極と前記金属リード片の内部端子部とを各々接続する金属細線と、前記リブの上端面に接合された透光板とを備えた固体撮像装置において、前記リブの上端面に外周に沿って低くなった低段部が形成され、少なくとも前記低段部に充填された接着材により、前記透光板の側面の一部にも接着剤があることを特徴とする。   The solid-state imaging device of the present invention includes a housing in which a substrate portion and a rectangular frame-shaped rib are integrally formed of resin, an internal terminal portion that is embedded in the housing and faces an internal space of the housing, and the housing A plurality of metal lead pieces each having an external terminal portion exposed to the outside, an image pickup device fixed on the substrate portion in the internal space of the housing, an electrode of the image pickup device, and an inside of the metal lead piece In a solid-state imaging device including a thin metal wire connecting each of the terminal portions and a translucent plate bonded to the upper end surface of the rib, a lower step portion that is lowered along the outer periphery is formed on the upper end surface of the rib. Further, at least a part of the side surface of the translucent plate has an adhesive due to the adhesive filled in the low step portion.

また、本発明の固体撮像装置は、前記透光板の側面は、前記リブの側面よりも内側になることを特徴とする。また、前記固体撮像装置側面のリブと接着剤は面一になっていることを特徴とする。   Moreover, the solid-state imaging device of the present invention is characterized in that the side surface of the translucent plate is inside the side surface of the rib. The rib on the side surface of the solid-state imaging device and the adhesive are flush with each other.

上記固体撮像装置の構成によれば、低段部に接着材が充填されることにより、接着材の体積を十分な大きさに確保できる。それにより、熱変形等に起因して透明板とリブとの間に応力が作用した際に、低段部の接着材が歪みを緩和して、応力に対する強度が向上する。   According to the configuration of the solid-state imaging device, a sufficient volume of the adhesive can be ensured by filling the low step portion with the adhesive. Thereby, when a stress acts between the transparent plate and the rib due to thermal deformation or the like, the low-stage adhesive material relaxes the distortion, and the strength against the stress is improved.

上記製造方法によれば、工程を複雑化させることなく、低段部に接着材が充填された構造を容易に作製することが可能である。   According to the above manufacturing method, it is possible to easily produce a structure in which the low step portion is filled with the adhesive without complicating the process.

以下、本発明の各実施の形態について、図面を参照して具体的に説明する。   Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

（実施の形態１）
図１は、実施の形態１における固体撮像装置の断面図、図２は下面図、図３は側面図である。 (Embodiment 1)
1 is a cross-sectional view of a solid-state imaging device according to Embodiment 1, FIG. 2 is a bottom view, and FIG. 3 is a side view.

１はエポキシ樹脂等の可塑性樹脂からなる筐体であり、平板状の基板部２上に矩形枠状のリブ３を配置した構造を、一体成形により作製したものである。筐体１の内部空間４に面した基板部２上に、撮像素子５が接合部材６により固定されている。リブ３の上端面には、例えばガラスからなる透光板７が接着剤８により接合され、それにより筐体１の内部空間４が封止されてパッケージが形成されている。リブ３の高さは、例えば０．３〜１．０ｍｍの範囲に設定される。リブ３の上端面には、外周に沿って低くなった低段部３ａが形成され、低段部３ａに充填された接着材８は厚い層を形成している。リブ３の最上端面と低段部３ａとの段差は、実用的には０．０５〜０．５ｍｍとすることが好ましい。   Reference numeral 1 denotes a housing made of a plastic resin such as an epoxy resin, which is produced by integral molding of a structure in which a rectangular frame-shaped rib 3 is arranged on a flat substrate portion 2. An imaging element 5 is fixed by a joining member 6 on the substrate portion 2 facing the internal space 4 of the housing 1. A translucent plate 7 made of glass, for example, is bonded to the upper end surface of the rib 3 with an adhesive 8, whereby the internal space 4 of the housing 1 is sealed to form a package. The height of the rib 3 is set in a range of 0.3 to 1.0 mm, for example. A low step portion 3a that is lowered along the outer periphery is formed on the upper end surface of the rib 3, and the adhesive 8 filled in the low step portion 3a forms a thick layer. Practically, the step between the uppermost end surface of the rib 3 and the low step portion 3a is preferably 0.05 to 0.5 mm.

筐体１には、複数の金属リード片９が成形時に埋め込まれている。金属リード片９は、筐体１の内部空間４から外部に電気的な導出を行うための部材であり、基板部２の内部空間４側の面に露出した内部端子部９ａと、基板部２の裏面の内部端子部９ａと対応する位置に露出した外部端子部９ｂと、筐体１の外側面に露出した側面電極部９ｃとを有する。撮像素子５の電極（図示せず）と各金属リード片９の内部端子部９ａとは、各々金属細線１０により接続されている。パッケージ全体の厚みは、例えば２．０ｍｍ以下に設定される。図１の固体撮像装置から透光板７を取り去った状態の平面形状を、図４に示す。   A plurality of metal lead pieces 9 are embedded in the housing 1 at the time of molding. The metal lead piece 9 is a member for electrically leading out from the internal space 4 of the housing 1 to the outside, and the internal terminal portion 9 a exposed on the surface on the internal space 4 side of the substrate portion 2 and the substrate portion 2. The external terminal portion 9b exposed at a position corresponding to the internal terminal portion 9a on the back surface of the housing 1 and the side electrode portion 9c exposed on the outer surface of the housing 1 are included. An electrode (not shown) of the image sensor 5 and the internal terminal portion 9a of each metal lead piece 9 are connected by a thin metal wire 10, respectively. The thickness of the entire package is set to 2.0 mm or less, for example. FIG. 4 shows a planar shape in a state in which the translucent plate 7 is removed from the solid-state imaging device of FIG.

この固体撮像装置においては、リブ３の上端面に低段部３ａが形成されていることにより、低段部３ａにおいて接着材８の体積を十分な大きさに確保できる。それにより、熱変形等に起因して、透明板７とリブ３との間に応力が作用した際に、低段部３ａの接着材８が歪みを緩和して、応力に対する強度が向上する。   In this solid-state imaging device, since the low step portion 3a is formed on the upper end surface of the rib 3, the volume of the adhesive 8 can be secured at a sufficient size in the low step portion 3a. Thereby, when a stress acts between the transparent plate 7 and the rib 3 due to thermal deformation or the like, the adhesive 8 of the low step portion 3a relaxes the distortion, and the strength against the stress is improved.

また図１に示されるように、金属リード片９において、内部端子部９ａの位置に対応する裏面が、外部端子部９ｂとなる。また、それらの部分において金属リード片９は基板部２と実質的に同一の厚さを有する。従って、樹脂成形時に、内部端子部９ａと外部端子部９ｂを、上下の金型により挟持してクランプすることが可能である。それにより、内部端子部９ａの面が上金型の面に押圧されて密着し、樹脂ばりの発生が抑制される。金属リード片９におけるリブ３の下部に位置する部分は、ハーフエッチにより薄くされ、下面が樹脂に覆われている。   Further, as shown in FIG. 1, in the metal lead piece 9, the back surface corresponding to the position of the internal terminal portion 9a becomes the external terminal portion 9b. In these portions, the metal lead piece 9 has substantially the same thickness as the substrate portion 2. Therefore, at the time of resin molding, the internal terminal portion 9a and the external terminal portion 9b can be clamped by being sandwiched between upper and lower molds. Thereby, the surface of the internal terminal portion 9a is pressed against and closely contacts the surface of the upper mold, and the occurrence of resin flash is suppressed. The portion of the metal lead piece 9 located below the rib 3 is thinned by half etching, and the lower surface is covered with resin.

図１および３に示されるように、筐体１の各外側面すなわちリブ３の外周面は、基板部２の面に対して実質的に直交する平面を形成している。また、透光板７の端面および側面電極部９ｃの表面は、筐体１の外側面と実質的に同一平面を形成している。このような同一平面をなす形状は、例えば、製造工程においてリブ３および透明板７を一括して切断することにより、良好な平坦度をもって形成することが可能である。   As shown in FIGS. 1 and 3, each outer surface of the housing 1, that is, the outer peripheral surface of the rib 3 forms a plane that is substantially orthogonal to the surface of the substrate portion 2. Further, the end face of the translucent plate 7 and the surface of the side electrode part 9 c form substantially the same plane as the outer face of the housing 1. Such a coplanar shape can be formed with good flatness by, for example, cutting the rib 3 and the transparent plate 7 together in the manufacturing process.

（実施の形態２）
実施の形態２における固体撮像装置の製造方法について、図５〜７を参照して説明する。この製造方法は、実施の形態１に示した構造の固体撮像装置を製造する方法である。 (Embodiment 2)
A method for manufacturing the solid-state imaging device according to Embodiment 2 will be described with reference to FIGS. This manufacturing method is a method for manufacturing the solid-state imaging device having the structure shown in the first embodiment.

先ず図５（ａ）に示すように、リードフレーム２１を用意する。リードフレーム２１は、図６の平面形状に示されるように、図１に示した金属リード片９を形成するためのリード部２２を複数個連結したものである。各リード部２２の内部端子部９ａに対応する位置における厚みは、基板部２の厚みと実質的に同一に設定される。リード部２２はその下面にハーフエッチにより形成された凹部２３を有し、後の工程においてこの部分で切断されることにより、図１に示した金属リード片９の形状になる。   First, as shown in FIG. 5A, a lead frame 21 is prepared. The lead frame 21 is formed by connecting a plurality of lead portions 22 for forming the metal lead piece 9 shown in FIG. The thickness of each lead portion 22 at a position corresponding to the internal terminal portion 9 a is set to be substantially the same as the thickness of the substrate portion 2. The lead portion 22 has a concave portion 23 formed by half-etching on the lower surface thereof, and is cut at this portion in a later process, so that the shape of the metal lead piece 9 shown in FIG. 1 is obtained.

次に、図５（ｂ）に示すように、リードフレーム２１を埋め込んで、基板部２４およびリブ形成部材２５からなる筐体２６を複数個含む樹脂成型体を一体成形する。成形後の平面形状を図７に示す。リード部２２の上下面は、各々基板部２４の上下面から露出するように埋め込まれて、各々内部端子部９ａおよび外部端子部９ｂを形成する。リブ形成部材２５は、隣接する筐体２６のリブを一本に合体して形成したものである。リブ形成部材２５の上端面には、その幅方向の中央部に配置され長さ方向に延在する溝部２５ａを設ける。   Next, as shown in FIG. 5 (b), the lead frame 21 is embedded, and a resin molded body including a plurality of housings 26 each including the substrate portion 24 and the rib forming member 25 is integrally formed. The planar shape after molding is shown in FIG. The upper and lower surfaces of the lead portion 22 are embedded so as to be exposed from the upper and lower surfaces of the substrate portion 24 to form the internal terminal portion 9a and the external terminal portion 9b, respectively. The rib forming member 25 is formed by combining the ribs of adjacent casings 26 into one. The upper end surface of the rib forming member 25 is provided with a groove portion 25a that is disposed at the center in the width direction and extends in the length direction.

次に、図５（ｃ）に示すように、リブ形成部材２５により包囲された各筐体２６の内部空間内に、撮像素子５を接着材６により固定して、撮像素子５のパッド電極（図示せず）と各内部端子部９ａとを金属細線１０により接続する。更に、溝部２５ａを中心にしてリブ形成部材２５の上端面に接着材２８を塗布する。接着材２８の塗布量は、溝部２５ａ内を充填するのに必要な量よりも若干多く、後述のように透明板２７を載置したときに、溝部２５ａの両側に端面と透明板２７との間に接着材２８が適度の厚みで介在するように設定する。   Next, as shown in FIG. 5C, the imaging element 5 is fixed with an adhesive 6 in the internal space of each casing 26 surrounded by the rib forming member 25, and the pad electrode ( (Not shown) and each internal terminal portion 9 a are connected by a thin metal wire 10. Further, the adhesive 28 is applied to the upper end surface of the rib forming member 25 with the groove 25a as the center. The application amount of the adhesive 28 is slightly larger than the amount necessary to fill the groove 25a. When the transparent plate 27 is placed as described later, the end face and the transparent plate 27 are placed on both sides of the groove 25a. It is set so that the adhesive 28 is interposed with an appropriate thickness therebetween.

次に図５（ｄ）に示すように、接着材２８が塗布されたリブ形成部材２５の上端面に透明板２７を載置して接合させる。   Next, as shown in FIG. 5D, a transparent plate 27 is placed on and joined to the upper end surface of the rib forming member 25 to which the adhesive 28 has been applied.

次に図５（ｅ）に示すように、透明板２７、リブ形成部材２５、リード部２２および基板部２４を、ダイシングブレード２９により切断して、図５（ｆ）に示すように、各固体撮像装置を形成する個片に分離する。切断は、図５（ｅ）に示したとおり、基板部２４に直交する方向であって、かつ平面形状において各リブ形成部材２５の幅を２分する方向に溝部２５ａ内で行う。その結果、分断された透明板２７、リブ形成部材２５、リード部２２および基板部２４により、１個の固体撮像装置を構成する透明板７と、基板部２およびリブ３からなる筐体１と、金属リード片９が形成される。リブ３の上端面には低段部３ａが残される。また、金属リード片９の側面電極部９ｃが露出する。   Next, as shown in FIG. 5 (e), the transparent plate 27, the rib forming member 25, the lead portion 22 and the substrate portion 24 are cut by a dicing blade 29, and each solid as shown in FIG. 5 (f). Separated into pieces that form the imaging device. As shown in FIG. 5E, the cutting is performed in the groove portion 25a in a direction perpendicular to the substrate portion 24 and in a direction that divides the width of each rib forming member 25 into two in a planar shape. As a result, the transparent plate 27, the rib forming member 25, the lead portion 22, and the substrate portion 24, which are divided, form the transparent plate 7 constituting one solid-state imaging device, and the housing 1 including the substrate portion 2 and the rib 3. A metal lead piece 9 is formed. A low step portion 3 a is left on the upper end surface of the rib 3. Further, the side electrode portion 9c of the metal lead piece 9 is exposed.

本実施の形態における製造方法によれば、工程を複雑化させることなく、低段部３ａに接着材２８が充填された構造を容易に作製することが可能である。また、溝部２５ａが形成されることによりリブ形成部材２５の樹脂の体積が減少し、熱による収縮・膨張を緩和する作用が得られる。   According to the manufacturing method in the present embodiment, it is possible to easily produce a structure in which the low step portion 3a is filled with the adhesive 28 without complicating the process. Moreover, the volume of the resin of the rib formation member 25 decreases by forming the groove part 25a, and the effect | action which eases shrinkage | contraction and expansion | swelling by a heat | fever is acquired.

また、隣接する筐体２６の２本のリブを合体させて形成された１本のリブ形成部材２５は、１本のリブを個別に成形する場合の幅の２倍より小さい幅に設定可能である。したがって、これを図５（ｅ）に示すように半分に切断すれば、図５（ｆ）に示す各個片の固体撮像装置におけるリブ３の幅は、１本のリブを個別に成形した場合に比べると小さくなり、その分、固体撮像装置の面積が縮小される。   In addition, one rib forming member 25 formed by combining two ribs of adjacent casings 26 can be set to a width smaller than twice the width in the case of individually molding one rib. is there. Therefore, if this is cut in half as shown in FIG. 5 (e), the width of the rib 3 in each solid-state imaging device shown in FIG. 5 (f) is the same as when one rib is molded individually. Compared to this, the area becomes smaller, and the area of the solid-state imaging device is reduced accordingly.

このようにしても、リブ形成部材２５の幅は、透明板２７を接合するための接着材の塗布には十分な範囲に確保可能である。極端な例では、個別に成形する場合の１本分の幅でリブ形成部材２５を成形し、それを２分割すれば、切断後のリブ３を幅を従来例の半分にすることができる。   Even in this case, the width of the rib forming member 25 can be secured within a range sufficient for applying the adhesive for joining the transparent plate 27. In an extreme example, if the rib forming member 25 is formed with a width corresponding to one formed individually and divided into two, the width of the cut rib 3 can be reduced to half that of the conventional example.

また、リブ形成部材２５を幅方向に２分して切断することにより、切断面は基板部２４に垂直になる。これに対して、従来のようにリブを個別に成形する場合、リブの外側面には、成形後に金型から抜くためのテーパが形成される。従って、本実施の形態により作製されるリブは、テーパ部が存在しない分だけ、リブの幅が低減される。   Further, by cutting the rib forming member 25 in half in the width direction, the cut surface becomes perpendicular to the substrate portion 24. On the other hand, when the ribs are individually molded as in the prior art, a taper is formed on the outer side surface of the ribs so as to be removed from the mold after molding. Therefore, the rib produced by the present embodiment has a reduced rib width corresponding to the absence of the tapered portion.

さらに、透明板２７、リブ形成部材２５およびリード部２２が同一のダイシングブレード２９により一括して切断されるので、透明板２７の端面、筐体１の側面および金属リード片９の端面が形成するパッケージ側面は、実質的に同一平面となり、良好な平坦度を得ることができる。したがって、光学系を収容した鏡筒を装着する際、パッケージの側面を利用して、撮像素子５の受光部に対する光学系の位置決めを高精度で行うことができる。すなわち、パッケージの側面と鏡筒の内面の当接により水平位置を容易に位置決めすることができる。なお、垂直方向の位置決めは、回路基板面と鏡筒の下面との当接により行うことができる。   Furthermore, since the transparent plate 27, the rib forming member 25, and the lead portion 22 are collectively cut by the same dicing blade 29, the end surface of the transparent plate 27, the side surface of the housing 1, and the end surface of the metal lead piece 9 are formed. The package side surfaces are substantially flush with each other, and good flatness can be obtained. Therefore, when the lens barrel containing the optical system is mounted, the optical system can be positioned with high accuracy with respect to the light receiving portion of the image sensor 5 by using the side surface of the package. That is, the horizontal position can be easily positioned by the contact between the side surface of the package and the inner surface of the lens barrel. The vertical positioning can be performed by contacting the circuit board surface and the lower surface of the lens barrel.

次に、上述の製造工程の図５（ｂ）に示した、樹脂による筐体の成形工程について、図８を参照して具体的に説明する。   Next, the molding process of the casing made of resin shown in FIG. 5B of the manufacturing process described above will be specifically described with reference to FIG.

まず図８（ａ）に示すように、上金型３０および下金型３１の間にリードフレームを配置して、リード部２２の上下面を、上金型３０および下金型３１でクランプする。下金型３１の上面は平面であるが、上金型３０の下面にはリブ形成部材２５を成形するための凹部３２が設けられている。凹部３２の底面には、溝部２５ａを成形するための凸部３０ａが形成されている。リード部２２を介材させることにより上金型３０および下金型３１の間に形成された空間部３３、上金型３０の凹部３２の空間部、およびリード部２２の凹部２３の空間部が、樹脂成形用のキャビティを形成する。   First, as shown in FIG. 8A, a lead frame is disposed between the upper mold 30 and the lower mold 31, and the upper and lower surfaces of the lead portion 22 are clamped by the upper mold 30 and the lower mold 31. . Although the upper surface of the lower mold 31 is a flat surface, a recess 32 for molding the rib forming member 25 is provided on the lower surface of the upper mold 30. On the bottom surface of the concave portion 32, a convex portion 30a for forming the groove portion 25a is formed. By interposing the lead part 22, the space part 33 formed between the upper mold 30 and the lower mold 31, the space part of the concave part 32 of the upper mold 30, and the space part of the concave part 23 of the lead part 22 are formed. A cavity for resin molding is formed.

次に図８（ｂ）に示すように、キャビティに樹脂を充填して、基板部２４およびリブ形成部材２５を成形する。その後図８（ｃ）に示すように、金型を開いて、図５（ｂ）に示したような、筐体が連結された成型体を取り出す。   Next, as shown in FIG. 8B, the substrate portion 24 and the rib forming member 25 are molded by filling the cavity with resin. Thereafter, as shown in FIG. 8 (c), the mold is opened, and the molded body connected to the casing as shown in FIG. 5 (b) is taken out.

なお、凹部３２の底面に凸部３０ａを成形することに代えて、成形物排出用のイジェクトピンを、凸部３０ａと同一の形状、寸法とし、凸部３０ａと同一箇所に配置することにより溝部２５ａを成形するようにしてもよい。   Instead of forming the convex portion 30a on the bottom surface of the concave portion 32, the ejected pin for discharging the molded product has the same shape and size as the convex portion 30a, and is disposed at the same location as the convex portion 30a. You may make it shape | mold 25a.

また、上記の成形工程においては、リード部２２の上下面を、上金型３０および下金型３１でクランプすることにより、金型面とリード部２２の上下面が密着した状態を安定して得ることができる。また、上金型３０の凹部３２の境界部は、リード部２２の上面に配置される。以上の結果、成形による樹脂ばりの発生が効果的に抑制される。   Further, in the above molding step, the upper and lower surfaces of the lead portion 22 are clamped by the upper die 30 and the lower die 31 so that the state where the die surface and the upper and lower surfaces of the lead portion 22 are in close contact with each other can be stabilized. Obtainable. Further, the boundary portion of the concave portion 32 of the upper mold 30 is disposed on the upper surface of the lead portion 22. As a result, the occurrence of resin flash due to molding is effectively suppressed.

また、筐体の樹脂成形に際して、金型とリードフレーム２１の間に、樹脂フラッシュバリの発生を抑制するための樹脂シートを介在させれば、ばりの発生をより効果的に抑制できる。   Further, when the resin molding of the housing is performed, if a resin sheet for suppressing the generation of resin flash burrs is interposed between the mold and the lead frame 21, the generation of flash can be more effectively suppressed.

（実施の形態３）
実施の形態３における固体撮像装置の製造方法について、図９を参照して説明する。この製造方法は、実施の形態２に示した製造方法と概略同様であるが、透明板として、複数の固体撮像装置の領域に亘る大面積のものではなく、個別に装着される透明板を用いる点が相違する。初期の工程は図５（ａ）〜図５（ｃ）と同様であるので、説明を省略する。 (Embodiment 3)
A method for manufacturing the solid-state imaging device according to Embodiment 3 will be described with reference to FIG. This manufacturing method is substantially the same as the manufacturing method shown in the second embodiment, but a transparent plate that is mounted individually is used as the transparent plate, not a large-area one that covers the area of a plurality of solid-state imaging devices. The point is different. Since the initial steps are the same as those in FIGS. 5A to 5C, the description thereof is omitted.

まず図９（ａ）に示すように、リブ形成部材２５により包囲された各筐体２６の内部空間内に、撮像素子５を固定し、金属細線１０による接続を完了した後に、リブ形成部材２５の溝部２５ａを中心に上端面に接着材２８を塗布する。   First, as shown in FIG. 9A, after the imaging device 5 is fixed in the internal space of each casing 26 surrounded by the rib forming member 25 and the connection by the metal thin wire 10 is completed, the rib forming member 25. The adhesive 28 is applied to the upper end surface around the groove 25a.

次に図９（ｂ）に示すように、各筐体に個別に対応させた透明板３４を載置する。隣接する透明板３４の周端縁は、リブ形成部材２５の上端面の溝部２５ａ内で、互いに所定の間隙を形成する大きさに設定されている。従って、接着材２８の上に透明板３４を載置すると、透明板３４の間の間隙に接着材２８が入り込んで、フィレット３５を形成する。   Next, as shown in FIG. 9B, a transparent plate 34 individually placed on each housing is placed. The peripheral edge of the adjacent transparent plate 34 is set to a size that forms a predetermined gap with each other in the groove 25 a on the upper end surface of the rib forming member 25. Therefore, when the transparent plate 34 is placed on the adhesive 28, the adhesive 28 enters the gap between the transparent plates 34 to form the fillet 35.

次に、フィレット３５、リブ形成部材２５、リード部２２および基板部２４を、ダイシングブレード２９により切断して、図９（ｃ）に示すように、各固体撮像装置を形成する個片に分離する。切断は、実施の形態２の場合と同様に、基板部２４に直交する方向であって、かつ平面形状において各リブ形成部材２５の幅を２分する方向に溝部２５ａ内の位置で行う。その結果、分断されたリブ形成部材２５、リード部２２および基板部２４により、各々１個の固体撮像装置を構成する、基板部２およびリブ３からなる筐体１、金属リード片９が形成される。また、透明板３４の周端縁部にフィレット３６が残される。   Next, the fillet 35, the rib forming member 25, the lead portion 22, and the substrate portion 24 are cut by a dicing blade 29 and separated into individual pieces forming each solid-state imaging device as shown in FIG. 9C. . As in the case of the second embodiment, the cutting is performed at a position in the groove portion 25a in a direction perpendicular to the substrate portion 24 and in a direction that divides the width of each rib forming member 25 into two in a planar shape. As a result, the divided rib forming member 25, the lead portion 22, and the substrate portion 24 form the casing 1 and the metal lead piece 9 that are each composed of the substrate portion 2 and the rib 3 and constitute one solid-state imaging device. The Further, the fillet 36 is left at the peripheral edge of the transparent plate 34.

この製造方法によれば、リブ形成部材２５の幅が十分に大きくなくとも、透明板３４の周端縁部にフィレット３６を形成して、透明板３４の接合を確実に行うことができる。   According to this manufacturing method, even if the width of the rib forming member 25 is not sufficiently large, the fillet 36 can be formed on the peripheral edge of the transparent plate 34 and the transparent plate 34 can be reliably joined.

本発明の固体撮像装置は、熱変形等に起因して透明板とリブとの間に応力が作用した際に低段部の接着材が歪みを緩和し、応力に対する強度が向上するので、ビデオカメラやスチルカメラ等に用いるのに好適である。   In the solid-state imaging device according to the present invention, when stress is applied between the transparent plate and the rib due to thermal deformation or the like, the low-level adhesive material relaxes the distortion and the strength against the stress is improved. It is suitable for use in cameras and still cameras.

本発明の実施の形態１における固体撮像装置の構成を示す断面図Sectional drawing which shows the structure of the solid-state imaging device in Embodiment 1 of this invention 図１の固体撮像装置の下面図1 is a bottom view of the solid-state imaging device of FIG. 図１の固体撮像装置の側面図Side view of the solid-state imaging device of FIG. 図１の固体撮像装置の透明板を取り去って示した平面図The top view which removed and showed the transparent plate of the solid-state imaging device of FIG. 本発明の実施の形態２における固体撮像装置の製造方法を示す断面図Sectional drawing which shows the manufacturing method of the solid-state imaging device in Embodiment 2 of this invention 同製造方法におけるリードフレームを示す平面図Plan view showing a lead frame in the manufacturing method 同製造方法におけるリードフレームを埋め込んで成形された樹脂成型体を示す平面図Plan view showing a resin molded body formed by embedding a lead frame in the manufacturing method 同製造方法における樹脂成形の工程を具体的に示す断面図Sectional drawing which shows specifically the process of resin molding in the manufacturing method 本発明の実施の形態３における固体撮像装置の製造方法を示す断面図Sectional drawing which shows the manufacturing method of the solid-state imaging device in Embodiment 3 of this invention 従来例の固体撮像装置の断面図Sectional view of a conventional solid-state imaging device 同固体撮像装置の筐体の成形工程を示す断面図Sectional drawing which shows the formation process of the housing | casing of the solid-state imaging device

符号の説明Explanation of symbols

１ 筐体
２ 基板部
３ リブ
３ａ 低段部
４ 内部空間
５ 撮像素子
６ 接合部材
７ 透光版
８ 接着材
９ 金属リード片
９ａ 内部端子部
９ｂ 外部端子部
９ｃ 側面電極部
１０ 金属細線
２１ リードフレーム
２２ リード部
２３ 凹部
２４ 基板部
２５ リブ形成部材
２５ａ 溝部
２６ 筐体
２７ 透明板
２８ 接着材
２９ ダイシングブレード
３０ 上金型
３０ａ 凸部
３１ 下金型
３２ 凹部
３３ 空間部
３４ 透明板
３５、３６ フィレット DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Board | substrate part 3 Rib 3a Low step part 4 Internal space 5 Image pick-up element 6 Joining member 7 Translucent plate 8 Adhesive material 9 Metal lead piece 9a Internal terminal part 9b External terminal part 9c Side electrode part 10 Metal fine wire 21 Lead frame 22 Lead part 23 Concave part 24 Substrate part 25 Rib forming member 25a Groove part 26 Case 27 Transparent plate 28 Adhesive material 29 Dicing blade 30 Upper mold 30a Convex part 31 Lower mold part 32 Concave part 33 Space part 34 Transparent plates 35, 36 Fillet

Claims (3)

基板部および矩形枠状のリブが樹脂により一体成形された筐体と、前記筐体に埋め込まれ、前記筐体の内部空間に面する内部端子部および前記筐体の外部に露出した外部端子部を各々有する複数本の金属リード片と、前記筐体の内部空間において前記基板部上に固定された撮像素子と、前記撮像素子の電極と前記金属リード片の内部端子部とを各々接続する金属細線と、前記リブの上端面に接合された透光板とを備えた固体撮像装置において、
前記リブの上端面に外周に沿って低くなった低段部が形成され、少なくとも前記低段部に充填された接着材により、前記透光板の側面の一部にも接着剤があることを特徴とする固体撮像装置。 A housing in which a substrate portion and a rectangular frame-shaped rib are integrally formed of resin, an internal terminal portion that is embedded in the housing and faces an internal space of the housing, and an external terminal portion that is exposed to the outside of the housing A plurality of metal lead pieces each having a plurality of metal lead pieces; an image pickup device fixed on the substrate portion in the internal space of the housing; and a metal connecting the electrodes of the image pickup device and the internal terminal portions of the metal lead pieces. In a solid-state imaging device including a thin wire and a light-transmitting plate bonded to the upper end surface of the rib,
A low step portion that is lowered along the outer periphery is formed on the upper end surface of the rib, and at least a part of the side surface of the translucent plate has an adhesive by an adhesive filled in the low step portion. A solid-state imaging device. 前記透光板の側面は、前記リブの側面よりも内側になることを特徴とする請求項１に記載の固体撮像装置。   The solid-state imaging device according to claim 1, wherein a side surface of the translucent plate is on an inner side than a side surface of the rib. 前記固体撮像装置側面のリブと接着剤は面一になっていることを特徴とする請求項１に記載の固体撮像装置。

The solid-state imaging device according to claim 1, wherein a rib and an adhesive on a side surface of the solid-state imaging device are flush with each other.

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JP2009047949A (en) * 2007-08-21 2009-03-05 Alps Electric Co Ltd Manufacturing method of optical element
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US8729775B2 (en) 2010-06-23 2014-05-20 Nihon Dempa Kogyo Co., Ltd. Piezoelectric vibrating devices and methods for manufacturing same
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