JP4585409B2 - 小型カメラモジュール - Google Patents

小型カメラモジュール Download PDF

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Publication number
JP4585409B2
JP4585409B2 JP2005243138A JP2005243138A JP4585409B2 JP 4585409 B2 JP4585409 B2 JP 4585409B2 JP 2005243138 A JP2005243138 A JP 2005243138A JP 2005243138 A JP2005243138 A JP 2005243138A JP 4585409 B2 JP4585409 B2 JP 4585409B2
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Japan
Prior art keywords
camera module
base
small camera
cut filter
lens
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.)
Expired - Fee Related
Application number
JP2005243138A
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English (en)
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JP2007060288A (ja
Inventor
博則 中條
道夫 佐々木
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Toshiba Corp
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Toshiba Corp
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Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2005243138A priority Critical patent/JP4585409B2/ja
Priority to US11/508,207 priority patent/US7525096B2/en
Priority to CNB2006101150976A priority patent/CN100466688C/zh
Publication of JP2007060288A publication Critical patent/JP2007060288A/ja
Application granted granted Critical
Publication of JP4585409B2 publication Critical patent/JP4585409B2/ja
Expired - Fee Related legal-status Critical Current
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    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
    • G—PHYSICS
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    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
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    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/901—Wide area network
    • Y10S370/902—Packet switching
    • Y10S370/903—Osi compliant network
    • Y10S370/906—Fiber data distribution interface, FDDI
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/901—Wide area network
    • Y10S370/902—Packet switching
    • Y10S370/903—Osi compliant network
    • Y10S370/907—Synchronous optical network, SONET
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99943—Generating database or data structure, e.g. via user interface

Description

この発明は、ＣＣＤあるいはＣＭＯＳセンサ等のイメージセンサを内蔵したレンズ付きの小型カメラモジュールに関するものである。
近年、ＣＣＤあるいはＣＭＯＳセンサ等のイメージセンサを内蔵したレンズ付きの小型カメラモジュールが開発されている（例えば、特許文献１参照）。小型カメラモジュールは、携帯電話機や携帯情報端末などに組み込まれて製品化されている。
小型カメラモジュールは、通常、イメージセンサ上にカバーガラスもしくはＩＲカットフィルタ、光学的ローパスフィルタ等のフィルタを有している。このフィルタの役割は、イメージセンサ上の空間を封止し、組み立て工程の後半で生じるダストによる不良を低減することや、カバーガラス上に蒸着された無反射コートや赤外カットコートにより、自然な色再現性を実現することである。
このようなフィルタに関わる従来の問題点としては、組み立て後に発生した移動ゴミによる不良がある。これは、出荷前テスト時には良品判定されたものの、輸送や市場での利用中に管内に存在していたダストが有効領域に移動して黒傷やシミ等の不良となるものである。これら移動ゴミの発生源としては、ＩＲカットフィルタのチッピングやＩＲカットフィルタをベースに接着するときに用いた接着剤の滲み出し、あるいはレンズバレルを移動したときにネジ部から出るダスト等がある。
特開２００４−８８１８１号公報
この発明は、組み立て後に発生した移動ゴミにより生じる黒傷やシミ等の不良を低減することができる小型カメラモジュールを提供することを目的とする。
この発明の第１実施態様の小型カメラモジュールは、基板上にマウントされたイメージセンサと、前記基板上に形成され、前記イメージセンサの上方に開口部を有するベースと、前記ベースの開口部に固着され、周辺部にダム材を有するフィルタと、前記フィルタ上に配置されたレンズを保持するレンズバレルとを具備することを特徴とする。
この発明によれば、組み立て後に発生した移動ゴミにより生じる黒傷やシミ等の不良を低減することができる小型カメラモジュールを提供することが可能である。
以下、図面を参照してこの発明の実施形態について説明する。説明に際し、全図にわたり、共通する部分には共通する参照符号を付す。
［第１実施形態］
この発明の第１実施形態の小型カメラモジュールについて説明する。
図１は、第１実施形態の小型カメラモジュールの構成を示す断面図である。
小型カメラモジュールは、図１に示すように、基板１１、イメージセンサチップ１２、ベース１３、ＩＲカットフィルタ１４、レンズフォルダ１５、レンズバレル１６、第１レンズ１７、第２レンズ１８、及びレンズストッパ１９を備えている。イメージセンサチップ１２には、ＣＣＤあるいはＣＭＯＳセンサ等が用いられる。ＩＲカットフィルタ１４は、所定の赤外光をカットするフィルタである。
基板１１上にはイメージセンサチップ１２がマウントされ、さらに基板１１上及びイメージセンサチップ１２の上方にはベース１３が形成されている。ベース１３は、イメージセンサチップ１２の上方に開口部を有している。ベース１３の開口部にはＩＲカットフィルタ１４が固着され、ＩＲカットフィルタ１４の周辺部には突起形状のダム材１４Ａが形成されている。ここで、ベース１３及びＩＲカットフィルタ１４により、イメージセンサチップ１２上の空間が封止される。また、ダム材１４Ａには、通常のポッティング材を用いてもよいし、エポキシ樹脂などの接着剤を用いてもよい。
ベース１３上には、レンズフォルダ１５が形成されている。また、レンズバレル１６は絞りを有し、第１レンズ１７、第２レンズ１８を保持している。言い換えると、レンズバレル１６の絞りを通過した光がレンズ１７、１８に入射するように、レンズストッパ１９によりレンズバレル１６にレンズ１７、１８が固定されている。レンズフォルダ１５とレンズバレル１６によりネジが形成されており、このネジの進行によりレンズバレル１６が上下されてレンズ１７、１８の位置が調整される。なおここでは、ベース１３とレンズフォルダ１５が別々に形成されている場合を示したが、これらが一体に形成されていてもよい。
レンズ１７、１８、ＩＲカットフィルタ１４、及びイメージセンサチップ１２は、光軸上に配置されており、レンズバレル１６の絞りを通過した光は、レンズ１７、１８を通過し、さらにＩＲカットフィルタ１４を通過してイメージセンサチップ１２面に結像される。
このような構造を持つ小型カメラモジュールでは、ＩＲカットフィルタ１４の周辺部に突起形状のダム材１４Ａが形成されている。このダム材１４Ａは、ＩＲカットフィルタ１４のチッピングやＩＲカットフィルタ１４をベース１３に接着するときに用いた接着剤の滲み出し、あるいはレンズバレル１６を移動するためのネジ部から出たダスト等の移動ゴミがＩＲカットフィルタ１４上に移動するのを防止する。これにより、出荷前テスト時には良品判定されたものの、輸送や市場での利用中に管内に存在していたダストが有効領域に移動して黒傷やシミ等となる不良を低減できる。
次に、ダム材１４Ａを有するＩＲカットフィルタ１４の製造方法について説明する。通常、ＩＲカットフィルタ１４は、大判と呼ばれるガラス板を、所用の大きさの個々に分割して作成される。ガラス板の分割には、通常の半導体の組み立て工程で、ウェハの切断に使用されるダイシング装置が用いられる。
図２（ａ）はガラス板の平面図であり、図２（ｂ）は分割されたＩＲカットフィルタ１４の平面図、図２（ｃ）はＩＲカットフィルタ１４の断面図である。
まず、図２（ａ）に示すように、ガラス板２０上にダム材２０Ａを格子状に形成する。ダム材２０Ａには、通常のポッティング材を用いてもよいし、エポキシ樹脂などの接着剤を用いてもよい。続いて、ダイシングによりガラス板２０をダム材２０Ａ上から切断し、図２（ｂ）に示すように、個々のＩＲカットフィルタ１４を作成する。このとき、ダム材２０Ａの幅を、ダイシングブレードの幅よりも太い所定の幅に設定することにより、ダイシング後のＩＲカットフィルタ１４の周辺部にダム材１４Ａをフリンジ状に残存させることができる。
以上説明したようにこの第１実施形態よれば、ＩＲカットフィルタ１４の周辺部に形成されたダム材１４Ａにより、組み立て後に発生した移動ゴミが有効領域に移動するのを防止できる。これにより、組み立て後に発生した移動ゴミにより生じる黒傷やシミ等の不良を低減することができる。
［第２実施形態］
次に、この発明の第２実施形態について説明する。前記第１実施形態における構成と同様の部分には同じ符号を付してその説明は省略する。
図３は、第２実施形態の小型カメラモジュールの構成を示す断面図である。
第２実施形態の小型カメラモジュールにおける基板１１上及びイメージセンサチップ１２の上方にはベース２１が形成されている。ベース２１はイメージセンサチップ１２の上方に開口部を有しており、開口部の近傍には突起部２１Ａが形成されている。さらに、ベース２１の開口部には、ＩＲカットフィルタ１４が固着されている。その他の構成は、第１実施形態の小型カメラモジュールと同様である。
このような構造を持つ小型カメラモジュールでは、ベース２１の開口部近傍に突起部２１Ａが形成されている。この突起部２１Ａは、ＩＲカットフィルタ１４のチッピングやＩＲカットフィルタ１４をベース１３に接着するときに用いた接着剤の滲み出し、あるいはレンズバレル１６を移動するためのネジ部から出たダスト等の移動ゴミがＩＲカットフィルタ１４上に移動するのを防止する。これにより、出荷前テスト時には良品判定されたものの、輸送や市場での利用中に管内に存在していたダストが有効領域に移動して黒傷やシミ等となる不良を低減できる。
［第３実施形態］
次に、この発明の第３実施形態について説明する。第１実施形態における構成と同様の部分には同じ符号を付してその説明は省略する。
図４は、第３実施形態の小型カメラモジュールの構成を示す断面図である。
第３実施形態の小型カメラモジュールにおける基板１１上及びイメージセンサチップ１２の上方にはベース２２が形成されている。ベース２２はセンサチップ１２の上方に開口部を有しており、開口部の近傍には溝部（凹み部）２２Ａが形成されている。さらに、ベース２２の開口部には、ＩＲカットフィルタ１４が固着されている。その他の構成は、第１実施形態の小型カメラモジュールと同様である。
このような構造を持つ小型カメラモジュールでは、ベース２２の開口部近傍に溝部２２Ａが形成されている。この溝部２２Ａは、ＩＲカットフィルタ１４のチッピングやＩＲカットフィルタ１４をベース１３に接着するときに用いた接着剤の滲み出し、あるいはレンズバレル１６を移動するためのネジ部から出たダスト等の移動ゴミがＩＲカットフィルタ１４上に移動するのを防止する。これにより、出荷前テスト時には良品判定されたものの、輸送や市場での利用中に管内に存在していたダストが有効領域に移動して黒傷やシミ等となる不良を低減できる。すなわち、前述した各実施形態においては、接着剤や移動ゴミがＩＲカットフィルタ１４上に移動するのを防止するために、ベースとフィルタの間に突起（又は溝）が設けられていればよい。
また、前述した各実施形態はそれぞれ、単独で実施できるばかりでなく、適宜組み合わせて実施することも可能である。さらに、前述した各実施形態には種々の段階の発明が含まれており、各実施形態において開示した複数の構成要件の適宜な組み合わせにより、種々の段階の発明を抽出することも可能である。
この発明の第１実施形態の小型カメラモジュールの構成を示す断面図である。 第１実施形態の小型カメラモジュールにおけるＩＲカットフィルタ１４の製造方法を示す図である。 この発明の第２実施形態の小型カメラモジュールの構成を示す断面図である。 この発明の第３実施形態の小型カメラモジュールの構成を示す断面図である。
符号の説明
１１…基板、１２…イメージセンサチップ、１３…ベース、１４…ＩＲカットフィルタ、１４Ａ…ダム材、１５…レンズフォルダ、１６…レンズバレル、１７…レンズ、１８…レンズ、１９…レンズストッパ、２０…ガラス板、２０Ａ…ダム材、２１…ベース、２１Ａ…突起部、２２…ベース、２２Ａ…溝部（凹み部）。

Claims (3)

  1. 基板上にマウントされたイメージセンサと、
    前記基板上に形成され、前記イメージセンサの上方に開口部を有するベースと、
    前記ベースの開口部に固着され、周辺部にダム材を有するフィルタと、
    前記フィルタ上に配置されたレンズを保持するレンズバレルと、
    を具備することを特徴とする小型カメラモジュール。
  2. 前記レンズバレルは絞りを有し、前記絞りから入射した光が前記レンズ、及び前記フィルタを通過して前記イメージセンサ上に結像されることを特徴とする請求項１に記載の小型カメラモジュール。
  3. 前記ベース上に形成されたフォルダをさらに有し、前記フォルダと前記レンズバレルによりネジ部が形成されていることを特徴とする請求項１または２に記載の小型カメラモジュール。
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