JP2003234926A - Solid-state image pickup device - Google Patents

Solid-state image pickup device

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Publication number
JP2003234926A
JP2003234926A JP2002031868A JP2002031868A JP2003234926A JP 2003234926 A JP2003234926 A JP 2003234926A JP 2002031868 A JP2002031868 A JP 2002031868A JP 2002031868 A JP2002031868 A JP 2002031868A JP 2003234926 A JP2003234926 A JP 2003234926A
Authority
JP
Japan
Prior art keywords
circuit board
solid
camera
flexible printed
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002031868A
Other languages
Japanese (ja)
Inventor
Naoto Horiguchi
直人 堀口
Kenichi Kudo
憲一 工藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Precision Inc
Original Assignee
Seiko Precision Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Precision Inc filed Critical Seiko Precision Inc
Priority to JP2002031868A priority Critical patent/JP2003234926A/en
Publication of JP2003234926A publication Critical patent/JP2003234926A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of disconnection, etc., in a solid-state image pickup device by easily and surely strengthening the connection between a circuit board for the camera and a flexible printed board. <P>SOLUTION: A solid-state image pickup element 2 is connected to one surface of the circuit board 1 for the camera and an IC3, which drives the element 2 is connected to the other surface of the board 1. In addition, the flexible printed board 6 is connected to the end section of the other surface of the board 1. Moreover, a sealing compound 7 is interposed between the IC3 and circuit board 1 for the camera so that the compound 7 reaches the connection 6a of the printed board 6. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は、固体撮像素子を用
いて撮像する固体撮像装置に関する。 【0002】 【従来の技術】従来、この種の装置では、図4に示すよ
うに、カメラ用回路基板1の表面に固体撮像素子2を接
続し、固体撮像素子2に撮像可能な位置にカメラユニッ
ト4を搭載している。そして、固体撮像素子2を駆動す
るためのIC(DSP)3をカメラ用回路基板1の裏面
にバンプ電極3aを介して接続している。固体撮像素子
2及びDSP3はカメラ用回路基板1の回路パターンに
接続され、回路パターンは、スルーホールを介して表面
と裏面とを接続している。DSP3は液状封止剤が混合
されている封止剤、いわゆるアンダーフィル30により
カメラ用回路基板1に固定している。回路パターンを本
体側の回路に接続するのにはフレキシブルプリント基板
(FPC)60が用いられ、カメラ用回路基板1の端部
の裏面に、フレキシブルプリント基板60との接続用の
接続パターンを設けている。 【0003】 【発明が解決しようとする課題】このような従来の構成
では、フレキシブルプリント基板60は屈曲して用いら
れるものであることから、カメラ用回路基板1とフレキ
シブルプリント基板との接続部が屈曲により剥離した
り、フレキシブルプリント基板60の回路パターンが断
線したりし易いので、このような剥離や断線を防止して
接続を安全確実にするためには、接続部を別途の補強テ
ープ13を用いて補強しなければならない。しかしなが
ら、それでもなお補強が足りず、剥離や断線を起こすこ
とがあった。そこで本発明は、カメラ用回路基板とフレ
キシブルプリント基板との接続を簡単かつ確実に強化
し、断線等を生じないようにする。 【0004】 【課題を解決するための手段】本発明の固体撮像装置
は、カメラ用回路基板の一方の面に固体撮像素子が接続
され、その他方の面に前記固体撮像素子を駆動するIC
が接続されており、前記他方の面の端部に、フレキシブ
ルプリント基板が接続されており、前記ICと前記カメ
ラ用回路基板との間に封止剤が介在しており、前記封止
剤は前記フレキシブルプリント基板の接続部まで達して
いることを特徴としている。この構成により、ICと共
にフレキシブルプリント基板がカメラ用回路基板に強固
に接続されるので、接続部において剥離を生じることが
防止でき、また固体状の封止剤によって接続部における
フレキシブルプリント基板の曲げが抑制されるので、回
路パターンの断線を防止できる。 【0005】 【発明の実施の形態】本発明の実施の一形態について、
図面を参照して説明する。図1に示すように、カメラ用
回路基板1は、この基板の表面及び裏面に不図示の回路
パターンを形成し、スルーホールを介して表裏両面の回
路パターンを導通させてある。カメラ用回路基板1の表
面には、固体撮像素子2が接続してあり、背面には、固
体撮像素子2を駆動するためのIC(DSP)3がバン
プ電極3aを介して接続してある。 【0006】カメラ用回路基板1の表面には、固体撮像
素子2の撮像面2a上に撮像可能な位置に、筒状のカメ
ラユニット4が固定してある。カメラユニット4は、第
1レンズ鏡筒41と第2レンズ鏡筒42とを螺合させ、
第1レンズ鏡筒41内にレンズ5等の光学部材を挿入
し、レンズ押え43でレンズ5を脱出不能に保持してな
るものである。レンズ押え43は、外周から突出させた
爪43aを、第1レンズ鏡筒41の内周に設けた突部4
1aに係止させることにより固定される。第1レンズ鏡
筒41を第2レンズ鏡筒42に対して回転することによ
り、レンズ5と撮像面2aとの距離を調整でき、ピント
の合せ込みが可能である。レンズ押え43と第1レンズ
鏡筒41とには、外部からの光を撮像面2aに導く開口
43b及び41bが設けてある。 【0007】図2に示すように、カメラ用回路基板1に
は、この固体撮像装置を本体側の基板に固定するために
3個の位置決め用凹部1a,1b,1cが形成してあ
る。そして不図示の回路パターンの所定の位置に、DS
P3が接続してあると共に、抵抗、コンデンサ、ダイオ
ード等の回路素子10が接続してある。DSP3には、
その角部にカメラ用回路基板1への方向を示す目印3b
が設けてある。また基板1の位置決め用凹部1a,1b
側の端部には、本体側の回路との導通を取るためのフレ
キシブルプリント基板(FPC)6との接続用の接続パ
ターン11が設けてある。 【0008】図3に示すように、FPC6の先端部の表
面側は接続部6aであって、接続パターン11に対接す
る接続パターン12が設けてある。この接続パターン1
2上には、不図示の半田が盛られている。接続部6a以
外の回路パターンは、FPC6の表面をカバーレイ6b
で被覆することで保護してある。カバーレイ6bの端部
は波形になっており、FPC6がカメラ用回路基板1の
端部に沿って屈曲しようとする時に、その曲げ応力が直
線状に集中して及ぶことを避けて、分散して及ぶように
し、FPC6上の回路パターンの破断を防いでいる。接
続パターン11に対応するカメラ用回路基板1の逆の面
にはFPC6の接続部6cにかかる曲げの応力を緩和す
るための補強テープ13が設けられている。 【0009】カメラ用回路基板1にDSP3及びFPC
6を接続する工程について説明する。図1に示すよう
に、DSP3をバンプ電極3aを介してカメラ用回路基
板1の裏面に接続する。次いで、接続パターン12上の
半田面を接続パターン11に対接させ、カメラ用回路基
板1の端部と接続部6aとを表裏から不図示の挟持部材
を用いて挟持し、加圧加熱することにより半田を溶かし
て両者を接合させる。次いで、液状封止材が混合された
エポキシ樹脂やシリコン樹脂を主成分とする封止剤であ
るアンダーフィル7を、DSP3の周囲及び背面と、F
PC6の接続部の背面との全面に一帯に塗布する。アン
ダーフィル7は、DSP3及びバンプ電極3aを固定す
ることによりDSP3を使用するとき等による熱で昇温
した際に、カメラ用回路基板1とDSP3とが異なる速
度で膨張してバンプ電極3aに応力が発生しても、その
応力を抑制し、バンプ電極3aの剥離を防いでいる。ま
た、アンダーフィル7は湿気や他の環境の影響からバン
プ電極3aを保護する役割もある。アンダーフィル7は
バンプ電極3aにより生じているDSP3とカメラ用回
路基板1との間の隙間にも浸入すると共に、FPC6の
接続部6aの裏面においては、カメラ用回路基板1の端
部から突出した位置にまで達している。即ち、DSP3
からFPC6の接続部6aまでの広い範囲に一括して塗
布され、その固体化によって図1に示すような固体化し
たアンダーフィル7が一面に形成される。 【0010】固体化したアンダーフィル7は、硬化した
際にあまり弾性がないので、DSP3からFPC6の接
続部6aにまで達する範囲に薄い板を当てたような状態
になる。このために、FPC3の屈曲や外部からの衝撃
等の機械的負荷が加わった際にも、FPC6の接続部6
aにかかる屈曲等による応力を抑制し、回路パターンの
断線を防ぐ。なお、接続部6aに達したアンダーフィル
7のみで接続部6aの補強が十分なときは補強テープ1
3を廃止してもよい。 【0011】 【発明の効果】このように本発明は、ICとカメラ用回
路基板との間に封止剤を介在させ、この封止剤はフレキ
シブルプリント基板の接続部まで達するようにしている
ので、カメラ用回路基板とフレキシブルプリント基板と
の接続を簡単かつ確実に強化でき、接続部における回路
パターンの断線事故等の不良を少なくできる。また、製
造工程を増やすことなく製造が容易である。
Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a solid-state imaging device for imaging using a solid-state imaging device. 2. Description of the Related Art Conventionally, in a device of this type, as shown in FIG. Unit 4 is mounted. Then, an IC (DSP) 3 for driving the solid-state imaging device 2 is connected to the back surface of the camera circuit board 1 via a bump electrode 3a. The solid-state imaging device 2 and the DSP 3 are connected to a circuit pattern of the camera circuit board 1, and the circuit pattern connects the front surface and the back surface via through holes. The DSP 3 is fixed to the camera circuit board 1 with a sealant in which a liquid sealant is mixed, so-called underfill 30. A flexible printed circuit board (FPC) 60 is used to connect the circuit pattern to the circuit on the main body side, and a connection pattern for connection to the flexible printed circuit board 60 is provided on the back surface of the end of the camera circuit board 1. I have. [0003] In such a conventional configuration, since the flexible printed circuit board 60 is used by bending, the connecting portion between the camera circuit board 1 and the flexible printed circuit board is formed. Since the peeling or the circuit pattern of the flexible printed circuit board 60 is easily broken due to bending, in order to prevent such peeling or breaking and secure the connection, a separate reinforcing tape 13 is required for the connecting portion. Must be used and reinforced. However, the reinforcement was still insufficient, and peeling and disconnection sometimes occurred. Therefore, the present invention enhances the connection between the camera circuit board and the flexible printed circuit board simply and reliably, and prevents disconnection or the like. According to the present invention, there is provided a solid-state imaging device in which a solid-state imaging device is connected to one side of a camera circuit board and the solid-state imaging device is driven on the other side.
Are connected, a flexible printed circuit board is connected to an end of the other surface, and a sealant is interposed between the IC and the camera circuit board. It is characterized in that it reaches the connection part of the flexible printed circuit board. With this configuration, the flexible printed circuit board is firmly connected to the camera circuit board together with the IC, so that peeling can be prevented from occurring at the connection part, and the flexible printed circuit board at the connection part can be bent by the solid sealing agent. Since this is suppressed, disconnection of the circuit pattern can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to the drawings. As shown in FIG. 1, the camera circuit board 1 has circuit patterns (not shown) formed on the front and back surfaces of the board, and the circuit patterns on both the front and back surfaces are made conductive through through holes. A solid-state image sensor 2 is connected to the front surface of the camera circuit board 1, and an IC (DSP) 3 for driving the solid-state image sensor 2 is connected to the rear surface via a bump electrode 3a. On the surface of the camera circuit board 1, a cylindrical camera unit 4 is fixed at a position where an image can be picked up on the image pickup surface 2a of the solid-state image pickup device 2. The camera unit 4 screwes the first lens barrel 41 and the second lens barrel 42,
An optical member such as the lens 5 is inserted into the first lens barrel 41, and the lens 5 is held by the lens retainer 43 so as not to come out. The lens presser 43 has a claw 43 a protruding from the outer periphery, and a projection 4
It is fixed by locking to 1a. By rotating the first lens barrel 41 with respect to the second lens barrel 42, the distance between the lens 5 and the imaging surface 2a can be adjusted, and focusing can be performed. The lens holder 43 and the first lens barrel 41 are provided with openings 43b and 41b for guiding external light to the imaging surface 2a. As shown in FIG. 2, three positioning recesses 1a, 1b and 1c are formed in the camera circuit board 1 in order to fix the solid-state imaging device to the main body side board. Then, at a predetermined position of a circuit pattern (not shown), DS
P3 is connected, and a circuit element 10 such as a resistor, a capacitor, and a diode is connected. DSP3 has
A mark 3b indicating the direction to the camera circuit board 1 at the corner.
Is provided. Also, positioning recesses 1a, 1b of substrate 1
A connection pattern 11 for connection to a flexible printed circuit board (FPC) 6 for establishing conduction with a circuit on the main body side is provided at the end on the side. As shown in FIG. 3, a connection portion 6a is provided on the front side of the front end portion of the FPC 6, and a connection pattern 12 which is in contact with the connection pattern 11 is provided. This connection pattern 1
2, solder (not shown) is piled up. For the circuit pattern other than the connection part 6a, cover the surface of the FPC 6 with a coverlay 6b.
Protected by coating. The end portion of the coverlay 6b has a waveform, and when the FPC 6 attempts to bend along the end portion of the camera circuit board 1, the bending stress is dispersed so as not to be concentrated in a straight line. The circuit pattern on the FPC 6 is prevented from being broken. On the opposite surface of the camera circuit board 1 corresponding to the connection pattern 11, a reinforcing tape 13 is provided for relaxing bending stress applied to the connection portion 6c of the FPC 6. The camera circuit board 1 includes a DSP 3 and an FPC.
The step of connecting 6 will be described. As shown in FIG. 1, the DSP 3 is connected to the back surface of the camera circuit board 1 via the bump electrodes 3a. Next, the solder surface on the connection pattern 12 is brought into contact with the connection pattern 11, and the end of the camera circuit board 1 and the connection portion 6 a are clamped from the front and back with a clamping member (not shown) and heated by pressing. Melts the solder to join the two. Next, an underfill 7 which is a sealing agent mainly composed of an epoxy resin or a silicone resin mixed with a liquid sealing material is provided around the DSP 3 and on the back surface thereof.
It is applied over the entire surface of the connection portion of the PC 6 with the back surface. The underfill 7 fixes the DSP 3 and the bump electrode 3a and causes the camera circuit board 1 and the DSP 3 to expand at different speeds when the temperature is increased by heat due to the use of the DSP 3 or the like. Even if a bump occurs, the stress is suppressed and peeling of the bump electrode 3a is prevented. The underfill 7 also has a role of protecting the bump electrode 3a from the influence of moisture and other environments. The underfill 7 also penetrates into the gap between the DSP 3 and the camera circuit board 1 generated by the bump electrode 3a, and protrudes from the end of the camera circuit board 1 on the back surface of the connection portion 6a of the FPC 6. Has reached the position. That is, DSP3
To the connecting portion 6a of the FPC 6, and the solidified underfill 7 as shown in FIG. 1 is formed on one surface. Since the solidified underfill 7 does not have much elasticity when it is hardened, it becomes like a thin plate is applied to the area from the DSP 3 to the connecting portion 6a of the FPC 6. For this reason, even when a mechanical load such as bending of the FPC 3 or an external impact is applied, the connecting portion 6 of the FPC 6
The stress due to bending or the like applied to a is suppressed, and disconnection of the circuit pattern is prevented. When only the underfill 7 reaching the connection portion 6a sufficiently stiffens the connection portion 6a, the reinforcing tape 1
3 may be abolished. As described above, according to the present invention, the sealing agent is interposed between the IC and the camera circuit board, and the sealing agent reaches the connection portion of the flexible printed circuit board. In addition, the connection between the camera circuit board and the flexible printed circuit board can be easily and reliably strengthened, and defects such as disconnection of the circuit pattern at the connection portion can be reduced. Further, the manufacturing is easy without increasing the number of manufacturing steps.

【図面の簡単な説明】 【図1】本発明の実施の一形態を示す断面図である。 【図2】同上、カメラ用回路基板の裏面図である。 【図3】同上、カメラ用回路基板に接続されるフレキシ
ブルプリント基板の一部の平面図である。 【図4】従来例を示す断面図である。 【符号の説明】 1 カメラ用回路基板 2 固体撮像素子 3 IC 6 フレキシブルプリント基板 7 封止剤
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of the present invention. FIG. 2 is a back view of the camera circuit board. FIG. 3 is a plan view of a part of a flexible printed circuit board connected to a camera circuit board. FIG. 4 is a sectional view showing a conventional example. [Description of Signs] 1 Camera circuit board 2 Solid-state imaging device 3 IC 6 Flexible printed board 7 Sealant

Claims (1)

【特許請求の範囲】 【請求項1】 カメラ用回路基板の一方の面に固体撮像
素子が接続され、その他方の面に前記固体撮像素子を駆
動するICが接続されており、 前記他方の面の端部に、フレキシブルプリント基板が接
続されており、 前記ICと前記カメラ用回路基板との間に封止剤が介在
しており、 前記封止剤は前記フレキシブルプリント基板の接続部ま
で達していることを特徴とする固体撮像装置。
1. A solid-state imaging device is connected to one surface of a camera circuit board, an IC for driving the solid-state imaging device is connected to the other surface, and the other surface is provided. A flexible printed circuit board is connected to an end of the flexible printed circuit board. A sealant is interposed between the IC and the camera circuit board, and the sealant reaches a connection portion of the flexible printed circuit board. A solid-state imaging device.
JP2002031868A 2002-02-08 2002-02-08 Solid-state image pickup device Pending JP2003234926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002031868A JP2003234926A (en) 2002-02-08 2002-02-08 Solid-state image pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002031868A JP2003234926A (en) 2002-02-08 2002-02-08 Solid-state image pickup device

Publications (1)

Publication Number Publication Date
JP2003234926A true JP2003234926A (en) 2003-08-22

Family

ID=27775150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002031868A Pending JP2003234926A (en) 2002-02-08 2002-02-08 Solid-state image pickup device

Country Status (1)

Country Link
JP (1) JP2003234926A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2013190748A1 (en) * 2012-06-22 2016-02-08 株式会社ニコン Substrate, imaging unit, and imaging apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2013190748A1 (en) * 2012-06-22 2016-02-08 株式会社ニコン Substrate, imaging unit, and imaging apparatus
US9743510B2 (en) 2012-06-22 2017-08-22 Nikon Corporation Substrate, imaging unit and imaging device
US10412824B2 (en) 2012-06-22 2019-09-10 Nikon Corporation Substrate, imaging unit and imaging device
US11343907B2 (en) 2012-06-22 2022-05-24 Nikon Corporation Substrate, imaging unit and imaging device

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