JP3009981B2 - Manufacturing method of tilt angle detector - Google Patents
Manufacturing method of tilt angle detectorInfo
- Publication number
- JP3009981B2 JP3009981B2 JP18982893A JP18982893A JP3009981B2 JP 3009981 B2 JP3009981 B2 JP 3009981B2 JP 18982893 A JP18982893 A JP 18982893A JP 18982893 A JP18982893 A JP 18982893A JP 3009981 B2 JP3009981 B2 JP 3009981B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- emitting element
- light receiving
- tilt angle
- light emitting
- 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
Links
Landscapes
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、被検出物からの反射光
の偏りによって被検出物の傾きを検出する傾き角検出器
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a tilt angle detector for detecting the tilt of an object based on the bias of reflected light from the object.
【０００２】[0002]
【従来の技術】図７は従来の傾き角検出器の製造方法を
示す断面図であり、樹脂封止時を示す。2. Description of the Related Art FIG. 7 is a cross-sectional view showing a method of manufacturing a conventional tilt angle detector, showing a state in which a resin is sealed.
【０００３】図中、１は基台であり、２は発光素子であ
り、３ａ，３ｂは受光素子であり、４はリードフレーム
であり、５はレンズ部であり、６は注型用金型である。In the figure, 1 is a base, 2 is a light emitting element, 3a and 3b are light receiving elements, 4 is a lead frame, 5 is a lens portion, and 6 is a casting mold. It is.
【０００４】本従来例の傾き角検出器は、リードフレー
ム４をインサート成形した基台１に発光素子２および受
光素子３ａ，３ｂをダイボンド、ワイヤボンドし、これ
らリードフレーム４の端子となる部分を除く部分を注型
用金型６を用いて透光性樹脂（例えば、エポキシ，ポリ
イミド樹脂等）にて封止し、レンズ部５を形成してなる
構成である。尚、前記レンズ部５は上面視略円形状に形
成している。In the tilt angle detector of this conventional example, a light emitting element 2 and light receiving elements 3a and 3b are die-bonded and wire-bonded to a base 1 on which a lead frame 4 is insert-molded, and the portions to be terminals of the lead frame 4 are formed. The lens portion 5 is formed by sealing a portion to be removed with a translucent resin (for example, epoxy or polyimide resin) using a casting mold 6. The lens section 5 is formed in a substantially circular shape when viewed from above.
【０００５】図８は、他の従来例を示す断面図である。FIG. 8 is a sectional view showing another conventional example.
【０００６】図中、７はレンズ付ホルダーであり、その
他上記従来例と同一部分については同一符号を付してい
る。In the drawing, reference numeral 7 denotes a holder with a lens, and the same parts as those in the above-mentioned conventional example are denoted by the same reference numerals.
【０００７】本従来例の傾き角検出器の製造方法は、リ
ードフレーム４をインサート成形した基台１に発光素子
２および受光素子３ａ，３ｂをダイボンド、ワイヤボン
ドし、前記発光素子２、受光素子３ａ，３ｂおよびボン
ディングワイヤを透光性樹脂（例えば、シリコン樹脂）
にてポッティングして保護し、前記基台１の上方にレン
ズ部５を有するレンズ付ホルダー７をケーシングしてな
る構成である。尚、前記レンズ部５は、上記従来例と同
様、上面視略円形状に形成されている。The method of manufacturing the tilt angle detector according to this conventional example is such that the light emitting element 2 and the light receiving elements 3a and 3b are die-bonded and wire-bonded to the base 1 on which the lead frame 4 is insert-molded. Transparent resin (for example, silicone resin) is used for 3a, 3b and the bonding wire.
The lens holder 5 having the lens portion 5 above the base 1 is protected by a casing. The lens section 5 is formed in a substantially circular shape as viewed from above, similarly to the above-described conventional example.
【０００８】以下に、従来の傾き角検出器の角度検出方
法について、図９乃至図１１に従って説明する。図９
は、被検出物体の傾きに対応した受光素子の集光状態を
示す図であり、図１０は傾き角測定回路を示す図であ
り、図１１は傾き角に対する出力を示す図である。Hereinafter, an angle detection method of the conventional tilt angle detector will be described with reference to FIGS. FIG.
FIG. 10 is a diagram illustrating a light-collecting state of the light receiving element corresponding to the tilt of the detected object, FIG. 10 is a diagram illustrating a tilt angle measuring circuit, and FIG. 11 is a diagram illustrating an output with respect to the tilt angle.
【０００９】図９に示すように、発光素子２から発せら
れた光が被検出物体Ｘへ照射され、被検出物体Ｘにより
反射された光が受光素子３ａ，３ｂに斜線部で示すよう
な領域をもって集光、結像される。As shown in FIG. 9, the light emitted from the light emitting element 2 is irradiated on the object X to be detected, and the light reflected by the object X is reflected on the light receiving elements 3a and 3b by the shaded area. Is focused and imaged.
【００１０】ここで、被検出物体Ｘの角度検出方法の角
度が零の場合、すなわち被検出物体Ｘが受発光素子面と
平行な状態のとき、図９（ａ）に示すように、集光され
た光の領域が第１受光素子３ａと第２受光素子３ｂとに
均等に結像される。また、この状態から被検出物体Ｘが
（＋）側（時計回り方向）へ回転して傾くとき、図９
（ｂ）に示すように、集光された光の領域は第１受光素
子３ａの方へ移動する。一方、（−）側（反時計回り方
向）へ回転して傾くときには、図９（ｃ）に示すよう
に、集光された光領域が第２受光素子３ｂの方へ移動す
る。[0010] Here, when the angle of the angle detection method of the detected object X is zero, that is, when the detected object X is parallel to the light emitting and receiving element surface, as shown in FIG. The formed light region is uniformly imaged on the first light receiving element 3a and the second light receiving element 3b. Also, when the detected object X rotates and tilts in the (+) direction (clockwise direction) from this state, the state shown in FIG.
As shown in (b), the area of the collected light moves toward the first light receiving element 3a. On the other hand, when rotating and tilting in the (-) side (counterclockwise direction), as shown in FIG. 9C, the condensed light area moves toward the second light receiving element 3b.
【００１１】このように、被検出物体Ｘが傾斜角度によ
って２分割された受光素子３ａ，３ｂ上を光の領域が移
動することにより、２分割された受光素子３ａ，３ｂ
は、被検出物体Ｘの傾斜角度に応じたそれぞれの光電流
ＩPD1，ＩPD2（図１０参照）を生じる。この光電流Ｉ
PD1とＩPD2との差をとると、図１１に示すように、角度
θに対して単調増加（＋方向），単調減少（−方向）と
なる特性が得られる。これにより、角度の検出が可能と
なる。As described above, the light region moves on the light receiving elements 3a and 3b, which are divided into two by the inclination angle, so that the object X to be detected is divided into two light receiving elements 3a and 3b.
Generates photocurrents I PD1 and I PD2 (see FIG. 10) corresponding to the inclination angle of the detection object X. This photocurrent I
Taking the difference between PD1 and IPD2 , as shown in FIG. 11, a characteristic is obtained in which the angle θ monotonically increases (+ direction) and monotonically decreases (− direction). As a result, the angle can be detected.
【００１２】上述した従来の傾き角検出器は、図１０に
示すように、発光素子２と受光素子３ａ，３ｂとが同一
のリードフレーム４上に搭載され、受発光素子２、３
ａ，３ｂ間が導通状態となっている。これは、ＧＮＤ端
子を共通としてリード端子の数を１本減らしているから
である。In the above-described conventional tilt angle detector, as shown in FIG. 10, the light emitting element 2 and the light receiving elements 3a and 3b are mounted on the same lead frame 4, and the light receiving and emitting elements 2, 3
a and 3b are in a conductive state. This is because the number of lead terminals is reduced by one by using a common GND terminal.
【００１３】[0013]
【発明が解決しようとする課題】図７に示す従来の傾き
角検出器の製造方法は、リードフレーム４をインサート
成形した基台１に発光素子２および受光素子３ａ，３ｂ
を手作業にてダイボンド、ワイヤボンドを行っていた。
これは、自動化することも考えられるが、これは自動化
するための装置が必要であり、コストが高くつく。この
ため、量産性に欠けていた。The conventional method for manufacturing a tilt angle detector shown in FIG. 7 is based on a light emitting element 2 and light receiving elements 3a, 3b mounted on a base 1 on which a lead frame 4 is insert-molded.
Die bonding and wire bonding were performed manually.
This can be automated, but this requires equipment for automation and is costly. For this reason, it lacked mass productivity.
【００１４】また、注型用金型６でレンズ部５を形成し
た場合には、図７の如く、樹脂ダレ８が生じ、これは角
度検出の基準面となる面をＰＷＢ等の基板表面に搭載し
たときの平行度の問題となる。さらに、前記発光素子２
および受光素子３ａ，３ｂとレンズ部５との位置関係を
精度良く配置する必要があった。これらは、歩留りに関
連する。When the lens portion 5 is formed by the casting mold 6, a resin sag 8 occurs as shown in FIG. 7, and a surface serving as a reference surface for angle detection is formed on the surface of a substrate such as PWB. This poses a problem of parallelism when mounted. Further, the light emitting element 2
In addition, the positional relationship between the light receiving elements 3a and 3b and the lens unit 5 must be accurately arranged. These are related to yield.
【００１５】従って、傾き角検出器を安価に製造するこ
とは非常に困難であった。Therefore, it was very difficult to manufacture the tilt angle detector at low cost.
【００１６】図８に示す傾き角検出器の製造方法は、上
記と同様に発光素子２および受光素子３ａ，３ｂのダイ
ボンド、ワイヤボンドを手作業にて行うとともに、両素
子２、３ａ，３ｂ及びボンディングワイヤー保護のた
め、ポッティング工程を手作業にて行う必要があり、量
産性に欠けている。また、受発光素子２、３ａ，３ｂと
レンズ付ホルダー７との位置関係を精度良く配置する必
要があり、これは歩留りに関連する。従って、低価格化
が困難である。In the method of manufacturing the tilt angle detector shown in FIG. 8, the light emitting element 2 and the light receiving elements 3a and 3b are die-bonded and wire-bonded by hand in the same manner as described above, and both elements 2, 3a and 3b and In order to protect the bonding wire, it is necessary to perform a potting step manually, which is lacking in mass productivity. Further, it is necessary to accurately arrange the positional relationship between the light emitting / receiving elements 2, 3a, 3b and the holder with lens 7, which is related to the yield. Therefore, it is difficult to reduce the price.
【００１７】本発明の傾き角検出器の製造方法は、上記
課題に鑑み、低価格化が図れる傾き角検出器の製造方法
の提供を目的とするものである。In view of the above problems, it is an object of the present invention to provide a method of manufacturing a tilt angle detector which can be manufactured at a low cost.
【００１８】[0018]
【課題を解決するための手段】本発明の傾き角検出器
は、発光素子と、複数に分割された受光素子とを備え、
発光素子から発せられた光が被検出物体へ照射され、被
検出物体から反射された光が複数に分割された受光素子
面上にどの様な領域をもって受光されるかにより被検出
物体の傾き角を検出する傾き角検出器の製造方法におい
て、前記発光素子および受光素子のそれぞれを個別のリ
ードフレームにダイボンド、ワイヤボンドし、前記発光
素子および受光素子をそれぞれ透光性樹脂にて一次モー
ルドしてなる一次成形体を金型成型する工程と、前記被
検出物体を介して前記発光素子と受光素子とが光学的に
結合するよう前面部に光の通過窓を有し、前記両一次成
形体を遮光性樹脂にて二次モールドし、一体化してなる
二次成形体を金型成型する工程と、前記二次成形体の前
面部に発光素子からの光を集光して被検出物体へ照射
し、被検出物体の反射光を受光素子に集光させるレンズ
を透光性樹脂にて三次モールドして金型成型する工程と
を備えてなることを特徴とするものである。A tilt angle detector according to the present invention includes a light emitting element and a plurality of divided light receiving elements.
The light emitted from the light emitting element is applied to the object to be detected, and the angle of inclination of the object to be detected is determined based on what area the light reflected from the object is received on the divided light receiving element surface. In the manufacturing method of the inclination angle detector for detecting the, the light emitting element and the light receiving element are each die-bonded to a separate lead frame, wire-bonded, and the light emitting element and the light receiving element are each primary molded with a translucent resin. A step of molding a primary molded body, and having a light-passing window on the front surface so that the light emitting element and the light receiving element are optically coupled via the detected object. Secondary molding with a light-shielding resin, and molding the integrated secondary molded body into a mold, and condensing light from the light emitting element on the front surface of the secondary molded body and irradiating the object to be detected Of the detected object It is characterized in that a lens for condensing light to the light receiving element comprising a step of molding a mold with tertiary molded at translucent resin.
【００１９】また、請求項２記載の傾き角検出器は、発
光素子と、複数に分割された受光素子とを備え、発光素
子から発せられた光が被検出物体へ照射され、被検出物
体から反射された光が複数に分割された受光素子面上に
どの様な領域をもって受光されるかにより被検出物体の
傾き角を検出する傾き角検出器の製造方法において、前
記発光素子および受光素子のそれぞれを個別のリードフ
レームにダイボンド、ワイヤボンドし、前記発光素子お
よび受光素子をそれぞれ透光性樹脂にて一次モールドし
てなる一次成形体を金型成型する工程と、前記被検出物
体を介して前記発光素子と受光素子とが光学的に結合す
るよう前面部に光の通過窓を有し、前記両一次成形体を
遮光性樹脂にて二次モールドし、一体化してなる二次成
形体を金型成型する工程と、前記二次成形体の前面部に
配置され、発光素子からの光を集光して被検出物体へ照
射し、被検出物体の反射光を受光素子に集光させるレン
ズを有するレンズ付ホルダーと前記二次成形体とを嵌合
する工程とを備えてなることを特徴とするものである。According to a second aspect of the present invention, there is provided a tilt angle detector including a light emitting element and a plurality of divided light receiving elements, wherein light emitted from the light emitting element is radiated to the object to be detected, and the light is emitted from the object to be detected. In a method for manufacturing a tilt angle detector for detecting a tilt angle of an object to be detected based on what area the reflected light is received on a plurality of divided light receiving element surfaces, the light emitting element and the light receiving element Die-bonding and wire-bonding each to a separate lead frame, a step of mold-forming a primary molded body obtained by primary-molding the light-emitting element and the light-receiving element with a translucent resin, and via the object to be detected. The light emitting element and the light receiving element have a light passing window on the front surface so as to be optically coupled, and the two primary molded bodies are secondarily molded with a light-shielding resin, and a secondary molded body that is integrated is formed. Mold molding And a lens disposed on the front surface of the secondary molded body, the lens having a lens for condensing light from the light emitting element and irradiating the light on the detection object, and condensing reflected light of the detection object on the light receiving element. And a step of fitting the holder and the secondary molded body.
【００２０】[0020]
【作用】上記構成によれば、本発明の請求項１記載の傾
き角検出器の製造方法は、発光素子と受光素子とを個別
のリードフレームに搭載することにより、ダイボンド、
ワイヤボンドを他の製品のアセンブリラインと共用して
使用でき、自動化することが可能となり、量産性を向上
できる。また、発光素子および受光素子と、レンズとの
位置関係を金型の精度により、精度良く配置することが
可能となる。従って、製造コストが低減され、傾き角検
出器を安価に提供できる。According to the above structure, the method for manufacturing the tilt angle detector according to the first aspect of the present invention is characterized in that the light emitting element and the light receiving element are mounted on separate lead frames, so that die bonding,
The wire bond can be used in common with the assembly line of other products, and can be automated, thereby improving mass productivity. Further, the positional relationship between the light emitting element and the light receiving element and the lens can be accurately arranged by the accuracy of the mold. Therefore, the manufacturing cost is reduced, and the tilt angle detector can be provided at low cost.
【００２１】また、請求項２記載の傾き角検出器の製造
方法は、発光素子と受光素子とを個別のリードフレーム
に搭載することにより、ダイボンド，ワイヤボンドを他
の製品のアセンブリラインと共用して使用でき自動化す
ることが可能となり、量産性を向上できるとともに、二
次成形体とレンズ付ホルダーとを別々に作製できるため
製造時間を短縮できる。従って、製造コストが低減さ
れ、傾き角検出器を安価に提供できる。According to a second aspect of the present invention, there is provided a method of manufacturing a tilt angle detector, in which a light emitting element and a light receiving element are mounted on separate lead frames, so that a die bond and a wire bond are shared with an assembly line of another product. In addition to being able to be used and being automated, mass production can be improved, and the production time can be reduced because the secondary molded body and the holder with lens can be separately manufactured. Therefore, the manufacturing cost is reduced, and the tilt angle detector can be provided at low cost.
【００２２】[0022]
【実施例】図１は本発明の第１実施例を示す製造工程図
である。図２は傾き角検出器の完成品を示す図であり、
同図（ａ）は縦断面図であり、同図（ｂ）は横断面図で
ある。図３は傾き角検出器の外観図を示す図であり、同
図（ａ）は平面図であり、同図（ｂ）は正面図であり、
同図（ｃ）は側面図であり、同図（ｄ）は裏面図であ
る。FIG. 1 is a manufacturing process diagram showing a first embodiment of the present invention. FIG. 2 is a view showing a completed product of the tilt angle detector.
FIG. 1A is a longitudinal sectional view, and FIG. 1B is a transverse sectional view. 3A and 3B are views showing an external view of the tilt angle detector, FIG. 3A is a plan view, FIG. 3B is a front view,
FIG. 3C is a side view, and FIG. 3D is a rear view.
【００２３】本発明の傾き角検出器の製造方法は、図１
（ａ）の如く、多連状に形成された個別のリードフレー
ム１１，１１′にそれぞれ発光素子１２および２分割さ
れた受光素子１３ａ，１３ｂをダイボンドし、所望のフ
レーム−素子間を電気的に接続するようワイヤボンドし
た後、前記発光素子１２および受光素子１３ａ，１３ｂ
はそれぞれ金型（図示せず）を用いてトランファー成形
による熱硬化性の透光性樹脂（例えば、エポキシ，ポリ
イミド樹脂等）にて一次モールドされ、一次成形体１
４，１４′が形成される。The method of manufacturing the tilt angle detector according to the present invention is shown in FIG.
As shown in (a), the light emitting element 12 and the two divided light receiving elements 13a and 13b are die-bonded to the individual lead frames 11 and 11 'formed in multiples, and the desired frame-element is electrically connected. After wire bonding for connection, the light emitting element 12 and the light receiving elements 13a, 13b
Are primarily molded with a thermosetting translucent resin (for example, epoxy or polyimide resin) by transfer molding using a mold (not shown).
4, 14 'are formed.
【００２４】次に、図１（ｂ）の如く、一次モールドさ
れた発光素子１２および受光素子１３ａ，１３ｂを所定
の光学特性、つまり上面に指向性を持ち、側面，底面を
遮光する光学特性となるように前記一次成形体１４，１
４′が遮光性樹脂にて覆われる。具体的には、前記発光
素子１２と受光素子１３ａ，１３ｂとが光学的に結合す
るための光の通過窓１５となる部分に両一次成形体１
４，１４′と隣接するよう金型に突出部を設け、前記金
型を用いて射出成型による熱可塑性の遮光性樹脂（例え
ば、ＰＰＳ等）にて二次モールドし、両一次成形体１
４，１４′を一体化してなる二次成形体１６を形成す
る。Next, as shown in FIG. 1 (b), the primary molded light emitting element 12 and light receiving elements 13a and 13b are provided with predetermined optical characteristics, that is, an optical characteristic having directivity on the top surface and light shielding on the side and bottom surfaces. The primary molded bodies 14, 1
4 'is covered with a light-shielding resin. More specifically, the two primary molded bodies 1 are provided at a portion serving as a light passage window 15 for optically coupling the light emitting element 12 and the light receiving elements 13a and 13b.
A protrusion is provided on the mold so as to be adjacent to 4, 4 ', and the mold is subjected to secondary molding using a thermoplastic light-shielding resin (for example, PPS or the like) by injection molding.
A secondary molded body 16 formed by integrating the members 4 and 14 'is formed.
【００２５】次に、図１（ｃ）の如く、前記通過窓１５
の前方に、発光素子１２からの光を集光して被検出物体
へ照射し、被検出物体の反射光を受光素子１３ａ，１３
ｂに集光させるレンズ１７を、金型を用いて、射出成形
による熱可塑性の透光性樹脂（例えば、アクリル系又は
ポリカーボネイト等）にて三次モールドして形成され
る。以上により製造された傾き角検出器の縦断面図およ
び横断面図を図２（ａ）及び図２（ｂ）に示す。Next, as shown in FIG.
Forward of the light, the light from the light emitting element 12 is condensed and radiated to the detected object, and the reflected light of the detected object is reflected by the light receiving elements 13a and 13a
The lens 17 to be focused on b is formed by tertiary molding with a mold using a thermoplastic translucent resin (for example, acrylic or polycarbonate) by injection molding. FIGS. 2A and 2B are a longitudinal sectional view and a transverse sectional view of the tilt angle detector manufactured as described above.
【００２６】前記発光素子１２および受光素子１３ａ，
１３ｂのダイボンド、ワイヤボンドは、例えば発光ダイ
オード，ホトダイオード等の２本足又は３本足のアセン
ブリラインを共用することにより、自動化を図るもので
ある。The light emitting element 12 and the light receiving element 13a,
The die bond and wire bond 13b are intended to be automated by sharing a two or three foot assembly line such as a light emitting diode and a photodiode.
【００２７】また、発光素子１２、受光素子１３ａ，１
３ｂ、レンズ１７の光学系の位置精度は金型にて精度良
く配置するものである。Further, the light emitting element 12, the light receiving elements 13a, 1
3b, the positional accuracy of the optical system of the lens 17 is precisely arranged using a mold.
【００２８】上述した傾き角検出器の製造方法によれ
ば、他の製品に使用するアセンブリラインを共用可能と
することができるため、発光素子１２および受光素子１
３ａ，１３ｂのダイボンド、ワイヤボンド工程が自動化
され、量産性を向上できる。また、発光素子１２および
受光素子１３ａ，１３ｂとレンズ１７との光学系の位置
関係を金型の精度により、精度良く配置することが可能
である。よって、歩留りが向上する。According to the method of manufacturing the tilt angle detector described above, the assembly line used for other products can be shared, so that the light emitting element 12 and the light receiving element 1 can be used.
The die bonding and wire bonding steps 3a and 13b are automated, and mass productivity can be improved. Further, the positional relationship of the optical system between the light emitting element 12 and the light receiving elements 13a and 13b and the lens 17 can be accurately arranged by the accuracy of the mold. Therefore, the yield is improved.
【００２９】従って、製造コストが低減され、傾き角検
出器を安価に提供できる。Therefore, the manufacturing cost is reduced, and the tilt angle detector can be provided at low cost.
【００３０】尚、上記実施例において、発光素子１２、
受光素子１３ａ，１３ｂを搭載したリードフレーム１
１，１１′は、それぞれ個別のリードフレームからな
り、従来例と異なり電気的に絶縁しているため、発光側
のリードは２本、受光側のリードは３本となる。一例と
して内部結線図を図４に示す。図４（ａ）は受光素子１
３ａ，１３ｂをアノード側共通とした場合であり、図４
（ｂ）は同じくカソード側を共通とした場合である。In the above embodiment, the light emitting element 12,
Lead frame 1 on which light receiving elements 13a and 13b are mounted
Each of the lead frames 1 and 11 'is composed of a separate lead frame and is electrically insulated unlike the conventional example. Therefore, the number of leads on the light emitting side is two and the number of leads on the light receiving side are three. FIG. 4 shows an internal connection diagram as an example. FIG. 4A shows the light receiving element 1.
FIG. 4 shows a case where 3a and 13b are common to the anode side.
(B) is a case where the cathode side is common.
【００３１】また、前記リードフレーム１１，１１′
は、角度検出方向に対して、垂直方向又、光の放射方向
に対しても垂直方向としている。これは、角度検出方向
へのセンサ形状が薄くでき、ピックアップ部と近接でき
る為角度の検出精度が向上する。さらにＰＷＢへの面実
装化が可能となる。The lead frames 11, 11 '
Is perpendicular to the angle detection direction or perpendicular to the light emission direction. Since the shape of the sensor in the angle detection direction can be made thinner and closer to the pickup unit, the angle detection accuracy is improved. Furthermore, surface mounting on PWB is possible.
【００３２】また、前記リードフレーム１１，１１′
は、フォーミングすることにより、光の放射方向と１８
０度異なる方向へ引き出すことも可能である。The lead frames 11, 11 '
By forming, the direction of light emission and 18
It is also possible to pull out in a direction different by 0 degrees.
【００３３】また、二次モールド時に、両一次成形体１
４，１４′の光学的位置精度を高精度とするため、金型
に両一次成形体１４，１４′の裏面それぞれと隣接する
突出部をさらに設けることにより、両一次成形体１４，
１４′の表裏面は金型の突出部で挟持され、高精度に位
置決めできる。Further, at the time of the secondary molding, both primary compacts 1
In order to increase the optical position accuracy of the primary moldings 14 and 14 ', the projections adjacent to the back surfaces of the primary moldings 14 and 14' are further provided in the mold, so that the primary moldings 14 and 14 'are provided.
The front and back surfaces of 14 'are sandwiched between the protrusions of the mold, and can be positioned with high precision.
【００３４】また、同じく二次モールド時に、図２及び
図３に示すように、二次成形体１６の底面にボスピン１
８を形成することにより、ＰＷＢ等の基板上へ装置する
ときの位置決めを高精度に行える。このボスピンは単数
でも良いが通常複数個とすることが望ましい。Also, at the time of the secondary molding, as shown in FIGS.
By forming 8, the positioning when the device is mounted on a substrate such as PWB can be performed with high accuracy. This boss pin may be singular, but usually it is desirable to have a plurality.
【００３５】ところで、一般に傾き角検出器は、角度検
出方向と９０度異なるタンジェンタル方向において、出
力変化の少ない特性が望ましい。すなわち、図１１の如
く、受光素子３ａ，３ｂの光電流ＩPD1とＩPD2との和が
フラットに近いことが必要である。In general, it is desirable that the inclination angle detector has a characteristic in which the output change is small in a tangential direction which differs from the angle detection direction by 90 degrees. That is, as shown in FIG. 11, the sum of the photocurrents I PD1 and I PD2 of the light receiving elements 3a and 3b needs to be close to flat.
【００３６】この出力変化は、被検出物体Ｘのタンジェ
ンタル方向の角度変化により生じる。例えば、被検出物
体Ｘがタンジェンタル方向に傾いた場合に、受光素子３
ａ，３ｂ上の光の像がタンジェンタル方向に移動し、出
力変化する。前記出力変化が大きくなると、角度検出方
向の出力（ＩPD1−ＩPD2）にバラツキが生じ、角度検出
精度の低下となる。This output change is caused by a change in the angle of the detected object X in the tangential direction. For example, when the detected object X is inclined in the tangential direction, the light receiving element 3
The light images on a and 3b move in the tangential direction and output changes. When the output change increases, the output in the angle detection direction ( IPD1- IPD2 ) varies, resulting in a decrease in angle detection accuracy.
【００３７】図７および図８に示す従来の傾き角検出器
は、レンズ部５が上面視略円形状に形成されており、受
光素子３ａ，３ｂ上の光の像は略円形状である。この場
合、例えば図９（ｂ）において、光の像を角度検出方向
を一定としてタンジェンタル方向へ移動したときには、
角度検出方向の出力（ＩPD1−ＩPD2）にバラツキが生じ
る。このため、図７および図８に示す傾き角検出器は、
被検出物体Ｘのタンジェンタル方向の角度変化により角
度検出方向の出力にバラツキが生じ、角度検出精度の低
下となった。In the conventional tilt angle detector shown in FIGS. 7 and 8, the lens portion 5 is formed in a substantially circular shape when viewed from above, and the light images on the light receiving elements 3a and 3b are substantially circular. In this case, for example, in FIG. 9B, when the light image is moved in the tangential direction while the angle detection direction is fixed,
The output ( IPD1- IPD2 ) in the angle detection direction varies. For this reason, the tilt angle detectors shown in FIGS.
The output in the angle detection direction varies due to a change in the angle of the detected object X in the tangential direction, and the angle detection accuracy is reduced.
【００３８】そこで、上記実施例において、前記レンズ
１７を、受発光素子１２、１３ａ，１３ｂの載置方向を
長軸とする上面視略だ円状に形成することにより、図５
の如く、受光素子１３ａ，１３ｂ上に集光される結像は
略だ円形状となり、被検出物体Ｘが角度検出方向と９０
度異なるタンジェンタル方向に若干傾いた場合において
も、分割された受光素子１３ａ，１３ｂの出力の総和を
ほぼ一定とすることができる。従って、角度検出精度を
向上できる。尚、図５（ａ）は被検出物体Ｘの角度検出
方向の角度が零の場合の図であり、図５（ｂ）は同じく
時計回り方向へ回転して傾いた場合の図であり、図５
（ｃ）は同じく反時計回りへ回転して傾いた場合の図で
ある。Therefore, in the above embodiment, the lens 17 is formed in a substantially elliptical shape in a top view with the mounting direction of the light receiving / emitting elements 12, 13a, 13b as a long axis, as shown in FIG.
The image formed on the light receiving elements 13a and 13b has a substantially elliptical shape, as shown in FIG.
Even when the light receiving elements 13a are slightly inclined in different tangential directions, the sum of the outputs of the divided light receiving elements 13a and 13b can be made substantially constant. Therefore, the angle detection accuracy can be improved. 5A is a diagram when the angle of the detected object X in the angle detection direction is zero, and FIG. 5B is a diagram when the object X is also rotated clockwise and tilted. 5
(C) is a figure in the case where it is similarly rotated counterclockwise and tilted.
【００３９】図６は本発明の第２実施例を示す図であ
り、同図（ａ）は正面断面図であり、同図（ｂ）は側面
断面図である。本実施例について、上記実施例と相違す
る点のみ説明する。FIG. 6 shows a second embodiment of the present invention. FIG. 6 (a) is a front sectional view, and FIG. 6 (b) is a side sectional view. In the present embodiment, only the points different from the above embodiment will be described.
【００４０】本実施例の傾き角検出器の製造方法は、三
次モールドの代わりに、別途、例えば射出成形による熱
可塑性の透光性樹脂（例えば、アクリル系又はポリカー
ボネイト等）にてレンズ付ホルダー１９を形成してお
き、また、二次モールド時に、二次成形体１６にあらか
じめフック形状を作製しておき、該フック２０により前
記レンズ付ホルダー１９と二次成形体１６とを嵌合させ
ることにより製造することが可能となるものである。The manufacturing method of the tilt angle detector of this embodiment is different from that of the tertiary mold in that the holder 19 with the lens is made of, for example, a thermoplastic translucent resin (for example, acrylic or polycarbonate) formed by injection molding. In addition, at the time of the secondary molding, a hook shape is prepared in advance in the secondary molded body 16, and the holder 19 with the lens and the secondary molded body 16 are fitted by the hook 20. It can be manufactured.
【００４１】上述した傾き角検出器の製造方法によれ
ば、上記実施例と同様、発光素子１２および受光素子１
３ａ，１３ｂのダイボンド、ワイヤボンドの自動化が行
え、量産性を向上できるとともに、二次成形体１６とレ
ンズ付ホルダー１９とを別々に作製できるため製造時間
を短縮できる。従って、製造コストが低減され、傾き角
検出器を安価に提供できる。According to the method of manufacturing the tilt angle detector described above, similarly to the above embodiment, the light emitting element 12 and the light receiving element 1 are provided.
Automation of die bonding and wire bonding of 3a and 13b can be performed, mass productivity can be improved, and the manufacturing time can be reduced because the secondary molded body 16 and the holder 19 with lens can be separately manufactured. Therefore, the manufacturing cost is reduced, and the tilt angle detector can be provided at low cost.
【００４２】尚、本実施例は、上記実施例と比べ、レン
ズ付ホルダー１９を外装ケースとするため樹脂量を低減
でき、また、金型は多連数（例えば２０連等）のものを
用意する必要がなく、通常２〜８ケ取りの金型で済むた
め、コスト的にメリットがでる。In this embodiment, as compared with the above embodiment, the amount of resin can be reduced because the lens-equipped holder 19 is used as an outer case, and a mold having a large number of dies (for example, 20 dies) is prepared. There is no need to perform this process, and usually only 2 to 8 molds are required.
【００４３】尚、上記実施例において、レンズ付ホルダ
ー１９のレンズ部１７を上述同様、上面視略だ円形状と
することにより、角度検出精度を向上できることは勿論
である。In the above-described embodiment, it is a matter of course that the angle detection accuracy can be improved by making the lens portion 17 of the lens-equipped holder 19 substantially elliptical as viewed from above, as described above.
【００４４】[0044]
【発明の効果】以上のように、本発明の請求項１記載の
傾き角検出器の製造方法によれば、発光素子および受光
素子のダイボンド，ワイヤボンドの自動化が可能となり
量産性が向上されるとともに、発光素子および受光素子
と、レンズとの位置合せ精度が向上され歩留りアップと
なる。従って、製造コストが低減され、傾き角検出器を
安価に提供できる。As described above, according to the method of manufacturing the tilt angle detector according to the first aspect of the present invention, the die bonding and the wire bonding of the light emitting element and the light receiving element can be automated, and the mass productivity is improved. At the same time, the alignment accuracy between the light emitting element and the light receiving element and the lens is improved, and the yield is increased. Therefore, the manufacturing cost is reduced, and the tilt angle detector can be provided at low cost.
【００４５】また、本発明の請求項２記載の傾き角検出
器の製造方法によれば、発光素子および受光素子のダイ
ボンド，ワイヤボンドの自動化が可能となり量産性が向
上されるとともに、二次成形体とレンズ付ホルダーとを
別々に作製できるため製造時間を短縮できる。従って、
製造コストが低減され、傾き角検出器を安価に提供でき
る。Further, according to the method of manufacturing the tilt angle detector according to the second aspect of the present invention, it is possible to automate die bonding and wire bonding of the light emitting element and the light receiving element, thereby improving mass productivity and secondary molding. Since the body and the holder with the lens can be manufactured separately, the manufacturing time can be reduced. Therefore,
The manufacturing cost is reduced, and the tilt angle detector can be provided at low cost.
【図１】本発明の第１実施例を示す製造工程図である。FIG. 1 is a manufacturing process diagram showing a first embodiment of the present invention.
【図２】本発明の第１実施例にて製造された傾き角検出
器の完成品を示す構成図であり、図（ａ）は縦断面図で
あり、図（ｂ）は横断面図である。FIGS. 2A and 2B are configuration diagrams showing a completed tilt angle detector manufactured according to the first embodiment of the present invention. FIG. 2A is a longitudinal sectional view, and FIG. is there.
【図３】同じく、完成品の外観図であり、図（ａ）は平
面図であり、図（ｂ）は正面図であり、図（ｃ）は側面
図であり、図（ｄ）は裏面図である。FIG. 3 is also an external view of the finished product, wherein FIG. 3 (a) is a plan view, FIG. 3 (b) is a front view, FIG. 3 (c) is a side view, and FIG. FIG.
【図４】同じく、内部結線の一例を示す図である。FIG. 4 is a diagram showing an example of an internal connection.
【図５】被検出物体の傾きに対応した受光素子の集光状
態を示す図である。FIG. 5 is a diagram illustrating a light condensing state of a light receiving element corresponding to an inclination of a detected object.
【図６】本発明の第２実施例を説明するための図であ
り、図（ａ）は正面断面図であり、図（ｂ）は側面断面
図である。FIG. 6 is a view for explaining a second embodiment of the present invention, wherein FIG. 6 (a) is a front sectional view and FIG. 6 (b) is a side sectional view.
【図７】従来例を説明するための側面断面図である。FIG. 7 is a side sectional view for explaining a conventional example.
【図８】他の従来例を説明するための側面断面図であ
る。FIG. 8 is a side sectional view for explaining another conventional example.
【図９】被検出物体の傾きに対応した受光素子の集光状
態を示す図である。FIG. 9 is a diagram illustrating a light condensing state of a light receiving element corresponding to an inclination of an object to be detected.
【図１０】傾き角測定回路を示す図である。FIG. 10 is a diagram showing a tilt angle measurement circuit.
【図１１】傾き角に対する出力を示す図である。FIG. 11 is a diagram showing an output with respect to a tilt angle.
１１，１１′ リードフレーム １２ 発光素子 １３ａ，１３ｂ 受光素子 １４，１４′一次成形体 １５ 通過窓 １６ 二次成形体 １７ レンズ（部） １９ レンズ付ホルダー 11, 11 'Lead frame 12 Light emitting element 13a, 13b Light receiving element 14, 14' Primary molded body 15 Passing window 16 Secondary molded body 17 Lens (part) 19 Holder with lens
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01L 31/12 G01B 11/26 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) H01L 31/12 G01B 11/26
Claims (2)
とを備え、発光素子から発せられた光が被検出物体へ照
射され、被検出物体から反射された光が複数に分割され
た受光素子面上にどの様な領域をもって受光されるかに
より被検出物体の傾き角を検出する傾き角検出器の製造
方法において、 前記発光素子および受光素子のそれぞれを個別のリード
フレームにダイボンド、ワイヤボンドし、前記発光素子
および受光素子をそれぞれ透光性樹脂にて一次モールド
してなる一次成形体を金型成型する工程と、前記被検出
物体を介して前記発光素子と受光素子とが光学的に結合
するよう前面部に光の通過窓を有し、前記両一次成形体
を遮光性樹脂にて二次モールドし、一体化してなる二次
成形体を金型成型する工程と、前記二次成形体の前面部
に発光素子からの光を集光して被検出物体へ照射し、被
検出物体の反射光を受光素子に集光させるレンズを透光
性樹脂にて三次モールドして金型成型する工程とを備え
てなることを特徴とする傾き角検出器の製造方法。1. A light-emitting element and a plurality of divided light-receiving elements, wherein light emitted from the light-emitting element is radiated to an object to be detected, and light reflected from the object is divided into a plurality of light-receiving elements. A method of manufacturing a tilt angle detector for detecting a tilt angle of an object to be detected based on what area is received on an element surface, wherein each of the light emitting element and the light receiving element is die-bonded and wire-bonded to an individual lead frame. A step of molding a primary molded body obtained by primary molding each of the light emitting element and the light receiving element with a translucent resin, and the light emitting element and the light receiving element are optically interposed via the detected object. A step of forming a light-transmitting window in the front part so as to be coupled, performing a secondary molding of the two primary molded bodies with a light-shielding resin, and molding the integrated secondary molded body with a mold; On the front of the body Condensing the light from the optical element, irradiating the object to be detected, tertiarily molding a lens for transmitting the reflected light of the object to the light receiving element with a translucent resin, and molding the mold. A method for manufacturing a tilt angle detector.
とを備え、発光素子から発せられた光が被検出物体へ照
射され、被検出物体から反射された光が複数に分割され
た受光素子面上にどの様な領域をもって受光されるかに
より被検出物体の傾き角を検出する傾き角検出器の製造
方法において、 前記発光素子および受光素子のそれぞれを個別のリード
フレームにダイボンド、ワイヤボンドし、前記発光素子
および受光素子をそれぞれ透光性樹脂にて一次モールド
してなる一次成形体を金型成型する工程と、前記被検出
物体を介して前記発光素子と受光素子とが光学的に結合
するよう前面部に光の通過窓を有し、前記両一次成形体
を遮光性樹脂にて二次モールドし、一体化してなる二次
成形体を金型成型する工程と、前記二次成形体の前面部
に配置され、発光素子からの光を集光して被検出物体へ
照射し、被検出物体の反射光を受光素子に集光させるレ
ンズを有するレンズ付ホルダーと前記二次成形体とを嵌
合する工程とを備えてなることを特徴とする傾き角検出
器の製造方法。2. A light receiving element comprising: a light emitting element; and a plurality of divided light receiving elements, wherein light emitted from the light emitting element is radiated to an object to be detected, and light reflected from the object is divided into a plurality of light receiving elements. A method of manufacturing a tilt angle detector for detecting a tilt angle of an object to be detected based on what area is received on an element surface, wherein each of the light emitting element and the light receiving element is die-bonded and wire-bonded to an individual lead frame. A step of molding a primary molded body obtained by primary molding each of the light emitting element and the light receiving element with a translucent resin, and the light emitting element and the light receiving element are optically interposed via the detected object. A step of forming a light-transmitting window in the front part so as to be coupled, performing a secondary molding of the two primary molded bodies with a light-shielding resin, and molding the integrated secondary molded body with a mold; On the front of the body Is placed, the light from the light emitting element is condensed and irradiated to the object to be detected, and the holder with a lens having a lens for condensing the reflected light of the object to be detected on the light receiving element is fitted to the secondary molded body. And a method of manufacturing a tilt angle detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18982893A JP3009981B2 (en) | 1993-07-30 | 1993-07-30 | Manufacturing method of tilt angle detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18982893A JP3009981B2 (en) | 1993-07-30 | 1993-07-30 | Manufacturing method of tilt angle detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0745861A JPH0745861A (en) | 1995-02-14 |
| JP3009981B2 true JP3009981B2 (en) | 2000-02-14 |
Family
ID=16247894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18982893A Expired - Fee Related JP3009981B2 (en) | 1993-07-30 | 1993-07-30 | Manufacturing method of tilt angle detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3009981B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19610881B4 (en) * | 1995-12-07 | 2008-01-10 | Limo Patentverwaltung Gmbh & Co. Kg | Microsystem module |
| JP4549640B2 (en) * | 2003-07-08 | 2010-09-22 | シャープ株式会社 | Tilt angle detection optical coupling device and electronic apparatus including the same |
-
1993
- 1993-07-30 JP JP18982893A patent/JP3009981B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745861A (en) | 1995-02-14 |
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