JPH07294450A - Soldering inspection method for high density surface mounting substrate - Google Patents

Soldering inspection method for high density surface mounting substrate

Info

Publication number
JPH07294450A
JPH07294450A JP8901094A JP8901094A JPH07294450A JP H07294450 A JPH07294450 A JP H07294450A JP 8901094 A JP8901094 A JP 8901094A JP 8901094 A JP8901094 A JP 8901094A JP H07294450 A JPH07294450 A JP H07294450A
Authority
JP
Japan
Prior art keywords
soldering
density surface
visible light
lead
solder
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.)
Withdrawn
Application number
JP8901094A
Other languages
Japanese (ja)
Inventor
Takashi Ito
貴志 伊藤
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP8901094A priority Critical patent/JPH07294450A/en
Publication of JPH07294450A publication Critical patent/JPH07294450A/en
Withdrawn legal-status Critical Current

Links

Abstract

PURPOSE:To provide a soldering inspection method for a high density surface mounting substrate by which a soldering condition can be speedily and accurately inspected. CONSTITUTION:Visible light is radiated from a visible light source 61 to a soldering part where solder is deposited onto the surface side of an electronic part to be mounted on a high density surface mounting substrate 30, and an image is picked up by a CCD camera 62, and visible light is radiated from the visible light source 61 to a solder part which has a lead extending outside of the electronic part to be mounted on the high density surface mounting substrate 30 and is exposed outside of a lead area of the soldering part, and an image is picked up by the CCD camera 62, and X-rays are projected on a lower part of the lead from an X-ray source 71, and an image is picked up by a vidicon system camera 72, and output signals from the CCD camera 62 and the vidicon system camera 72 are processed by an information processor 80, and soldering inspection data is obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、高密度表面実装基板上
への電子部品の実装における半田付後の半田付検査方法
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soldering inspection method after soldering in mounting electronic components on a high-density surface mounting board.

【0002】[0002]

【従来の技術】従来、この種の高密度表面実装基板上へ
の電子部品の実装における半田付後の検査方法は、可視
光線、レーザ光線、X線等、単一光源によって行われて
おり、これらの単一光源からの反射光、透過光を、CC
Dカメラやビジコン系カメラで結像し、電気信号に変換
後、アナログ/デジタル(A/D)変換処理により、記
録するようにしていた。
2. Description of the Related Art Conventionally, an inspection method after soldering in mounting electronic components on a high-density surface-mounting substrate of this type is performed by a single light source such as visible light, laser light, or X-ray. CC reflected light and transmitted light from these single light sources
An image is formed by a D camera or a vidicon camera, converted into an electric signal, and then recorded by analog / digital (A / D) conversion processing.

【0003】このようにして記録したデータに対し、各
種プログラム言語によって作成したプログラム(アルゴ
リズムと呼ぶ)により、半田付けの良否を判定するもの
であった。以下、従来のかかる半田付検査方法について
説明する。 (1)可視光方式には複数の方式があるが、主に実用化
されている方法を、図6に示す。この図に示すように、
可視光源1より投射された光は、被検査物である、基板
3上に形成される電極4とガルウィングリード6とを接
続する半田5で反射し、CCDカメラ2に入射する。こ
の時、画素毎に結像した光量を、8ビット(256階
調)にディジタル化し、2値化処理(0〜255の濃度
値のうちのある値よりも大きければ0、小さければ1と
する処理)し、設定したウィンドウ(特定の範囲)にお
ける「1」となった画素数の大小を判定する。
With respect to the data recorded in this way, the quality of soldering is determined by a program (called an algorithm) created in various programming languages. The conventional soldering inspection method will be described below. (1) Although there are a plurality of visible light methods, the method that is mainly put into practical use is shown in FIG. As shown in this figure,
The light projected from the visible light source 1 is reflected by the solder 5, which is an object to be inspected and which connects the electrode 4 formed on the substrate 3 and the gull wing lead 6, and enters the CCD camera 2. At this time, the amount of light imaged for each pixel is digitized into 8 bits (256 gradations), and binarized (0 if it is larger than a certain density value among 0 to 255 and 1 if it is smaller). Processing), and the size of the number of pixels that has become “1” in the set window (specific range) is determined.

【0004】(2)レーザ方式で主に実用化されている
方式を図7に示す。この図に示すように、レーザ光源1
1より投射されたレーザ光は、被検査物である、基板1
4上に形成される電極15とガルウィングリード17と
を接続する半田16で反射し、受光ボックス13に入射
する。この受光ボックス13には、CCDカメラ12が
有り、レーザ光をスキャンさせることで、数列が出力さ
れる。この数列の並び方により判定する。
(2) FIG. 7 shows a method mainly used in the laser method. As shown in this figure, the laser light source 1
The laser beam projected from the substrate 1 is the inspection object, the substrate 1
It is reflected by the solder 16 connecting the electrode 15 formed on the surface 4 and the gull wing lead 17, and enters the light receiving box 13. The light-receiving box 13 has a CCD camera 12, which scans a laser beam to output several sequences. Judgment is made according to the arrangement of this sequence of numbers.

【0005】(3)X線方式で主に実用化されている方
法を図8に示す。この図に示すように、X線源21より
投射されたX線は、被検査物である、基板23上に形成
される電極24とガルウィングリード26とを接続する
半田25を透過し、不可視光用カメラ(ビジコン系カメ
ラ)22に入射する。X線では、各材質、厚みにより透
過率が異なり、特に半田の透過率が低いことにより半田
の検査を行う。判定の方法は可視光と同じである。
(3) FIG. 8 shows a method mainly used in the X-ray system. As shown in this figure, the X-rays projected from the X-ray source 21 pass through the solder 25 connecting the electrode 24 formed on the substrate 23 and the gull wing lead 26, which is an object to be inspected, and invisible light. It is incident on a video camera (vidicon camera) 22. With X-rays, the transmittance differs depending on each material and thickness, and the solder is particularly inspected because the transmittance of the solder is low. The determination method is the same as that for visible light.

【0006】[0006]

【発明が解決しようとする課題】しかし、以上述べたい
ずれの従来の方法であっても、複雑な形状をもつ高密度
表面実装基板上への電子部品の実装においては、従来の
目視検査のタクトタイムを満足し、かつ高密度の判定を
得ることはできず、また、多品種少量生産に対応できる
だけの検査プログラム作成時間の削減ができず、技術的
に満足できるものが得られなかった。
However, in any of the above-mentioned conventional methods, when the electronic components are mounted on the high-density surface mounting board having a complicated shape, the tact of the conventional visual inspection is used. It was not possible to obtain a technically satisfactory one because the time could not be satisfied and a high-density judgment could not be obtained, and the inspection program creation time could not be reduced enough to handle high-mix low-volume production.

【0007】理由としては、可視光方式及びレーザ方式
は、測定する部分が可視範囲に限られているため、QF
P(Quad Flat Package)のような、
可視範囲が半田付全体の20%に満たない部位の検査を
しているため、判定精度が低いこと、あるいは外乱光の
影響を受けて誤差の発生が多い欠点がある。これは、X
線方式ならば解決できるが、X線が放射状に発生するた
め、一視野における検査範囲が狭く、検査時間が目視よ
り過大になること、あるいは、複数のアルゴリズムを使
用しなければならず、検査プログラムの作成時間が過大
になる欠点がある。
The reason is that in the visible light method and the laser method, the portion to be measured is limited to the visible range.
Like P (Quad Flat Package),
Since the inspection is performed on a portion whose visible range is less than 20% of the whole soldering, there is a drawback that the determination accuracy is low or an error is often generated due to the influence of ambient light. This is X
Although it can be solved by the line method, since the X-rays are generated radially, the inspection range in one field of view is narrow and the inspection time is longer than the visual inspection, or multiple algorithms must be used, and the inspection program Has the drawback that it takes too long to create.

【0008】このように、1種の光源で複雑な形状をも
つ高密度表面実装基板上への電子部品の実装の欠点を全
て除去するのは困難であるといった問題がある。本発明
は、上記問題点を除去し、電子部品の半田付けの態様に
合わせて、可視光方式とX線方式とを組み合わせること
により、迅速にして的確な半田付け状態を検査可能な、
高密度表面実装基板の半田付検査方法を提供することを
目的とする。
As described above, there is a problem that it is difficult to eliminate all the defects of mounting electronic components on a high-density surface-mounting substrate having a complicated shape with one type of light source. The present invention eliminates the above-mentioned problems, and according to the soldering mode of electronic components, by combining the visible light method and the X-ray method, it is possible to quickly and accurately inspect the soldering state,
An object of the present invention is to provide a soldering inspection method for a high density surface mount board.

【0009】[0009]

【課題を解決するための手段】本発明は、上記目的を達
成するために、電子部品が搭載される高密度表面実装基
板の半田付検査方法において、高密度表面実装基板上に
搭載される電子部品の表面側に半田が盛られる半田付け
部には可視光を照射して、CCDカメラで撮像し、高密
度表面実装基板上に搭載される電子部品の外部に延びる
リードを有し、盛られた半田上に該リードが半田付けさ
れる半田付け部のリード領域以外に露出している半田部
には可視光を照射して、CCDカメラで撮像し、該リー
ドの下部はX線を投射して、ビジコン系カメラで撮像
し、高密度表面実装基板上に搭載される電子部品の下方
で半田付けがなされる半田付け部にはX線を投射して、
ビジコン系カメラで撮像し、前記CCDカメラ及びビジ
コン系カメラからの出力信号を情報処理装置で処理し、
半田付検査データを得るようにしたものである。
In order to achieve the above-mentioned object, the present invention provides a soldering inspection method for a high-density surface-mounted board on which electronic components are mounted. The soldering part where solder is deposited on the surface side of the component has a lead extending to the outside of the electronic component mounted on the high-density surface mount board by irradiating visible light and picking up an image with a CCD camera. The solder is exposed to visible light on the solder portion other than the lead area of the soldering portion where the lead is soldered onto the solder, and the CCD camera takes an image, and the lower portion of the lead projects X-rays. Then, an image is taken with a vidicon camera, and an X-ray is projected to a soldering portion where soldering is performed below an electronic component mounted on a high-density surface mounting board,
An image is taken by a vidicon camera, the output signals from the CCD camera and the vidicon camera are processed by an information processing device,
The soldering inspection data is obtained.

【0010】[0010]

【作用】本発明は、上記したように、電子部品が搭載さ
れる高密度表面実装基板の半田付検査装置において、電
子部品の半田付け部の態様に応じて、可視光方式とX線
方式とを組み合わせ、トータルとしての高密度表面実装
基板の半田付検査を迅速、かつ的確に行うことができ
る。
As described above, the present invention, in the soldering inspection apparatus for a high-density surface-mounting board on which electronic components are mounted, employs a visible light method and an X-ray method depending on the mode of the soldering portion of the electronic components. By combining the above, the soldering inspection of the high-density surface mount board as a whole can be performed quickly and accurately.

【0011】[0011]

【実施例】以下、本発明の実施例について図を参照しな
がら詳細に説明する。図1は本発明の実施例を示す高密
度表面実装基板の半田付検査装置の斜視図、図2は殆ど
表面に半田が盛られるチップ部品としてのチップコンデ
ンサの実装断面図、図3はリードの下方にも半田が盛ら
れるガルウィングリードを有するQFPのリードの半田
付け部の斜視(図1のA部拡大斜視)図、図4は半田が
殆どチップの下方に位置するJ形状曲げリードを有する
ICチップの半田付け部の断面図である。
Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view of a soldering inspection apparatus for a high-density surface mounting board showing an embodiment of the present invention, FIG. 2 is a mounting cross-sectional view of a chip capacitor as a chip component on which most of the surface is soldered, and FIG. FIG. 4 is a perspective view of a soldering portion of a lead of a QFP having a gull wing lead on which solder is also deposited (enlarged perspective view of portion A in FIG. 1), and FIG. It is sectional drawing of the soldering part of a chip.

【0012】図1において、30は高密度表面実装基
板、31はチップ部品としてのチップコンデンサ、38
は基板の基準穴、41はQFP、51はJ形状曲げリー
ドを有するICチップ、61は可視光源、62はCCD
カメラ、71はX線源、72はビジコン系カメラ、80
は情報処理装置、91はCRTである。以下、電子部品
の半田付け態様毎にその半田付検査を順を追って説明す
る。
In FIG. 1, 30 is a high-density surface mount substrate, 31 is a chip capacitor as a chip component, and 38 is a chip capacitor.
Is a reference hole of the substrate, 41 is QFP, 51 is an IC chip having a J-shaped bending lead, 61 is a visible light source, and 62 is a CCD.
A camera, 71 is an X-ray source, 72 is a vidicon camera, 80
Is an information processing device, and 91 is a CRT. Hereinafter, the soldering inspection will be described step by step for each soldering mode of the electronic component.

【0013】(1)まず、殆ど表面に半田が盛られるチ
ップ部品としてのコンデンサや抵抗等のチップ部品の半
田付けを検査する場合について説明する。図2に示すよ
うに、高密度表面実装基板30上に配線33が形成さ
れ、その配線33の先端部には接続パッド33aが形成
されている。その接続パッド33a間には非導電性接着
剤34が設けられ、その上方に接続パッド33aをブリ
ッジするように、電極31aを有するチップコンデンサ
31を実装する。その電極31aと配線33の接続パッ
ド33aとが接続されるように半田36が盛られる。
(1) First, the case of inspecting the soldering of chip parts such as capacitors and resistors as chip parts in which solder is deposited almost on the surface will be described. As shown in FIG. 2, the wiring 33 is formed on the high-density surface mounting substrate 30, and the connection pad 33 a is formed at the tip of the wiring 33. A non-conductive adhesive 34 is provided between the connection pads 33a, and the chip capacitor 31 having the electrodes 31a is mounted above the non-conductive adhesive 34 so as to bridge the connection pads 33a. Solder 36 is placed so that the electrode 31a and the connection pad 33a of the wiring 33 are connected.

【0014】この場合には、半田36が高密度表面実装
基板30の表面側にのみ盛られるので、可視光源61の
みを使用して、半田付けの外観検査を行う。すなわち、
図1に示すように、被検査物である高密度表面実装基板
30を可視光源軸に移動し、可視光源軸に合わせ、チッ
プコンデンサ31の半田36をCCDカメラ62に結像
する。
In this case, since the solder 36 is placed only on the front surface side of the high-density surface-mounting substrate 30, only the visible light source 61 is used to perform a visual inspection of soldering. That is,
As shown in FIG. 1, the high-density surface-mounting substrate 30, which is the inspection object, is moved to the visible light source axis, aligned with the visible light source axis, and the solder 36 of the chip capacitor 31 is imaged on the CCD camera 62.

【0015】(2)リードの下方にも半田が盛られるガ
ルウィングリードを有するQFPを検査する場合につい
て説明する。図3に示すように、高密度表面実装基板3
0上に接続用パッド42が形成され、その上に半田43
が盛られて、そこにQFP41のガルウィングリード4
4が半田付けされる。
(2) A case of inspecting a QFP having a gull wing lead in which solder is also deposited under the lead will be described. As shown in FIG. 3, the high density surface mount substrate 3
Connection pad 42 is formed on top of which solder 43 is formed.
Is displayed, and there is a gullwing lead 4 on the QFP41.
4 is soldered.

【0016】この場合は、まず、高密度表面実装基板3
0の表面から見える半田の部分は、可視光を照射してC
CDカメラ62で結像し、その後、X線軸に被検査物で
ある高密度表面実装基板30を移動し、X線源71から
の透過光をガルウィングリード44下部に位置する半田
の部分に投射して透過させ、ビジコン系カメラ72に結
像する。
In this case, first, the high-density surface mount board 3
The part of the solder that can be seen from the surface of 0 is irradiated with visible light to C
An image is formed by the CD camera 62, and thereafter, the high-density surface mount substrate 30 which is the object to be inspected is moved along the X-ray axis, and the transmitted light from the X-ray source 71 is projected onto the solder portion located under the gull wing lead 44. And transmits the light to form an image on the vidicon camera 72.

【0017】なお、上記したQFP41以外にもリード
の下方にも半田が盛られるFPP(Flat Pack
age Plastic)や、SOP(Small O
utline Package)などの半田付検査も、
同様の方式で行うことができる。 (3)半田が殆どチップの下方に位置するJ形状曲げリ
ードを有するICチップの場合はX線のみによる透過検
査を行う。
In addition to the QFP 41 described above, FPP (Flat Pack) in which solder is also deposited under the leads.
age Plastic) and SOP (Small O
For soldering inspection such as utline package)
It can be done in a similar manner. (3) In the case of an IC chip having a J-shaped bent lead whose solder is located almost below the chip, a transmission inspection using only X-rays is performed.

【0018】J形状曲げリードを有するICチップの場
合は、図4に示すように、ICチップ51から導出され
るJ形状曲げリード52は、高密度表面実装基板30上
の接続パッド53上に盛られた半田54に接続される
が、その半田付けは殆どICチップ51の下方となるの
で、可視方式によっては検査できない。したがって、こ
の場合は、X線のみによる透過検査を行う。
In the case of an IC chip having a J-shaped bending lead, as shown in FIG. 4, the J-shaped bending lead 52 derived from the IC chip 51 is placed on the connection pad 53 on the high-density surface mounting substrate 30. The solder 54 is connected to the solder 54, but since the soldering is almost below the IC chip 51, it cannot be inspected by the visible method. Therefore, in this case, a transmission inspection using only X-rays is performed.

【0019】CCDカメラ62及びビジコン系カメラ7
2の出力信号は、情報処理装置80で処理し、その高密
度表面実装基板30の半田付検査のデータは、CRT9
1に表示することができる。なお、上記J形状曲げリー
ド52を有する電子部品以外にも、例えば、ICチップ
の下側にバンブ電極を有するフリップチップの半田付検
査も、同様の方式で行うことができる。
CCD camera 62 and vidicon camera 7
The output signal of No. 2 is processed by the information processing device 80, and the data of the soldering inspection of the high-density surface mounting board 30 is CRT9.
1 can be displayed. In addition to the electronic component having the J-shaped bent lead 52, for example, a soldering inspection of a flip chip having a bump electrode below the IC chip can be performed in the same manner.

【0020】図5は本発明の実施例を示すCCDカメラ
又はビジコン系カメラで結像した後の高密度表面実装基
板の半田付検査装置の情報処理系を示すブロック図であ
る。この図に示すように、CCDカメラ62、ビジコン
系カメラ72からの出力信号は、情報処理装置80に取
り込まれる。すなわち、CCDカメラ62、ビジコン系
カメラ72にそれぞれにA/D変換器81,83、中央
処理装置(CPU)82,84が接続されている。
FIG. 5 is a block diagram showing an information processing system of a soldering inspection apparatus for a high-density surface-mounted substrate after an image is formed by a CCD camera or a vidicon camera according to an embodiment of the present invention. As shown in this figure, the output signals from the CCD camera 62 and the vidicon camera 72 are captured by the information processing device 80. That is, A / D converters 81 and 83 and central processing units (CPU) 82 and 84 are connected to the CCD camera 62 and the vidicon camera 72, respectively.

【0021】このCPU82,84は1〜n個用意され
たバッファ85に画像を送り、プロセッサ86でそれぞ
れ処理し、検査結果を出力するためのファイルを読み込
み、不良箇所にはフラグをたてる。このファイルをバス
87に転送し、CPU88が、可視光源、X線源それぞ
れのファイルを読み込み、プロセッサ89でその時のフ
ラグの組合せで判定を行い、外部端子90にデータを出
力する。このデータは、例えば、CRT91等により表
示することができる。
The CPUs 82, 84 send images to the buffers 1 to n prepared, and the processors 86 process the images respectively, read the files for outputting the inspection results, and flag defective portions. This file is transferred to the bus 87, the CPU 88 reads the files for the visible light source and the X-ray source, the processor 89 makes a determination based on the combination of the flags at that time, and outputs the data to the external terminal 90. This data can be displayed by, for example, the CRT 91 or the like.

【0022】ここで示した情報処理装置の内部構成は、
一例にすぎず、適宜変更することができる。要するにC
CDカメラ62、ビジコン系カメラ72から取り込まれ
た情報を高速にしかも的確に処理できるのであれば、種
々の変更可能である。以下、一例として、基板サイズ1
00mm×200mmにチップ部品100個、44ピン
QFPを1個実装する基板における半田付検査について
説明する。
The internal configuration of the information processing apparatus shown here is
This is only an example and can be changed as appropriate. In short, C
Various changes can be made as long as the information taken in from the CD camera 62 and the vidicon camera 72 can be processed accurately at high speed. Below, as an example, substrate size 1
A soldering inspection on a board on which 100 chip parts and one 44-pin QFP are mounted on a 00 mm × 200 mm will be described.

【0023】可視光方式では、1箇所に対し、検査速度
は、最高で0.07secが可能であり、合計17se
cで検査が終了する。しかしながら、判定精度では、チ
ップ部品は99%以上が可能であるが、QFPでは85
%が限界である。検査データ作成については、通常、8
時間以内で完了する。X線方式では判定精度は全部品9
9%以上が可能であるが、一視野(12.4mm角)で
1sec要するため、153画面を検査しなければなら
ず、153secと可視光方式の10倍弱の検査時間が
かかる。また、検査データ作成については通常40時間
を要する。
In the visible light system, the inspection speed for one location can be 0.07 sec at the maximum, and a total of 17 sec.
The inspection ends at c. However, in terms of determination accuracy, 99% or more of chip components are possible, but with QFP it is 85%.
% Is the limit. Regarding the creation of inspection data, usually 8
Complete in less than an hour. In the X-ray method, the judgment accuracy is 9 for all parts.
Although 9% or more is possible, one field (12.4 mm square) requires 1 sec, so 153 screens must be inspected, which requires 153 sec, which is slightly less than 10 times the inspection time of the visible light method. Further, it usually takes 40 hours to prepare the inspection data.

【0024】従って、本発明によれば、上記の例では、
検査時間は可視光14sec、X線4secの合計18
sec、判定精度は99%以上が可能である。また、検
査データ作成においては、QFPを可視光方式とX線方
式との組合せで検査するため、X線の機能が簡略化でき
る(通常、10個程度のアルゴリズムを必要とする)た
め、アルゴリズムは2〜3個で済み削減される。これに
よれば、最大でも16時間/人で作成が可能となる。
Therefore, according to the invention, in the above example:
Inspection time is 14 seconds for visible light and 4 seconds for X-ray, total 18
sec, the determination accuracy can be 99% or more. In addition, since the QFP is inspected by the combination of the visible light method and the X-ray method in the inspection data creation, the function of the X-ray can be simplified (usually, about 10 algorithms are required). A few will be enough to reduce. According to this, it is possible to create it at a maximum of 16 hours / person.

【0025】更に、本発明によれば、半田付面積の10
0%を検査するため検査の信頼性は高い。また、挿入部
品複合基板も検査可能である。なお、本発明は上記実施
例に限定されるものではなく、本発明の趣旨に基づいて
種々の変形が可能であり、これらを本発明の範囲から排
除するものではない。
Furthermore, according to the present invention, a soldering area of 10
The inspection reliability is high because 0% is inspected. Also, the insert component composite board can be inspected. The present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the spirit of the present invention, and these modifications are not excluded from the scope of the present invention.

【0026】[0026]

【発明の効果】以上、詳細に説明したように、本発明に
よれば、電子部品が搭載される高密度表面実装基板の半
田付検査方法において、電子部品の半田付け部の態様に
応じて、可視光方式とX線方式とを組み合わせ、トータ
ルとしての高密度表面実装基板の半田付検査を迅速、か
つ的確に行うことができる。すなわち、 (1)実装部品の表面側に半田が盛られるチップ部品は
可視光源を用いて検査することにより、高速で検査が可
能となる。
As described above in detail, according to the present invention, in the soldering inspection method for the high density surface mount board on which the electronic component is mounted, according to the aspect of the soldering part of the electronic component, By combining the visible light method and the X-ray method, it is possible to perform the soldering inspection of the high-density surface mount board as a whole quickly and accurately. That is, (1) the chip component in which solder is deposited on the surface side of the mounted component is inspected using a visible light source, so that the inspection can be performed at high speed.

【0027】(2)ガルウィング型ICの半田付検査は
可視方式とX線方式の2種を用い、X線方式では、リー
ドの下部の半田のみを透過検査することにより、X線の
検査アルゴリズムが簡略され、検査データ作成時間が短
縮される。 (3)X線方式のみを用いてJリード型ICの検査も可
能である。 (4)半田付検査の判定精度が高い。つまり、99%以
上の判定精度を確保することができる。
(2) The soldering inspection of the gull wing type IC uses two kinds of the visible method and the X-ray method. In the X-ray method, only the solder under the lead is inspected for transmission, so that the X-ray inspection algorithm is It is simplified and the inspection data creation time is shortened. (3) It is possible to inspect a J-lead type IC by using only the X-ray method. (4) The judgment accuracy of the soldering inspection is high. That is, it is possible to ensure a determination accuracy of 99% or more.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例を示す高密度表面実装基板の半
田付検査装置の斜視図である。
FIG. 1 is a perspective view of a soldering inspection apparatus for a high-density surface mount board showing an embodiment of the present invention.

【図2】殆ど表面に半田が盛られるチップ部品としての
チップコンデンサの実装断面図である。
FIG. 2 is a mounting cross-sectional view of a chip capacitor as a chip component in which solder is mostly deposited on the surface.

【図3】リードの下方にも半田が盛られるガルウィング
リードを有するQFPのリードの半田付け部の斜視図で
ある。
FIG. 3 is a perspective view of a soldering portion of a QFP lead having a gull-wing lead in which solder is also placed under the lead.

【図4】半田が殆どチップの下方に位置するJ形状曲げ
リードを有するICチップの半田付け部の断面図であ
る。
FIG. 4 is a cross-sectional view of a soldered portion of an IC chip having a J-shaped bent lead in which solder is almost below the chip.

【図5】本発明の実施例を示すCCDカメラ又はビジコ
ン系カメラで結像した後の高密度表面実装基板の半田付
検査装置の情報処理系を示すブロック図である。
FIG. 5 is a block diagram showing an information processing system of a soldering inspection apparatus for a high-density surface-mounted substrate after an image is formed by a CCD camera or a vidicon camera according to an embodiment of the present invention.

【図6】従来の可視光方式による高密度表面実装基板の
半田付検査方法を示す図である。
FIG. 6 is a diagram showing a conventional soldering inspection method for a high-density surface mount board by a visible light method.

【図7】従来のレーザ方式による高密度表面実装基板の
半田付検査方法を示す図である。
FIG. 7 is a diagram showing a conventional soldering inspection method for a high-density surface-mounting substrate by a laser system.

【図8】従来のX線方式による高密度表面実装基板の半
田付検査方法を示す図である。
FIG. 8 is a diagram showing a conventional soldering inspection method for a high-density surface mount board by an X-ray method.

【符号の説明】[Explanation of symbols]

30 高密度表面実装基板 31 チップコンデンサ 31a 電極 33 配線 33a,42,53 接続パッド 34 非導電性接着剤 36,43,54 半田 38 基板の基準穴 41 QFP 44 ガルウィングリード 51 ICチップ 52 J形状曲げリード 61 可視光源 62 CCDカメラ 71 X線源 72 ビジコン系カメラ 80 情報処理装置 81,83 A/D変換器 82,84,88 中央処理装置(CPU) 85 バッファ 86,89 プロセッサ 87 バス 90 外部端子 91 CRT 30 High Density Surface Mounted Substrate 31 Chip Capacitor 31a Electrode 33 Wiring 33a, 42, 53 Connection Pad 34 Non-conductive Adhesive 36, 43, 54 Solder 38 Board Reference Hole 41 QFP 44 Gull Wing Lead 51 IC Chip 52 J-Shaped Lead 61 visible light source 62 CCD camera 71 X-ray source 72 vidicon camera 80 information processing device 81, 83 A / D converter 82, 84, 88 central processing unit (CPU) 85 buffer 86, 89 processor 87 bus 90 external terminal 91 CRT

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 電子部品が搭載される高密度表面実装基
板の半田付検査方法において、(a)高密度表面実装基
板上に搭載される電子部品の表面側に半田が盛られる半
田付け部には可視光を照射して、CCDカメラで撮像
し、(b)高密度表面実装基板上に搭載される電子部品
の外部に延びるリードを有し、盛られた半田上に該リー
ドが半田付けされる半田付け部のリード領域以外に露出
している半田部には可視光を照射して、CCDカメラで
撮像し、該リードの下部はX線を投射して、ビジコン系
カメラで撮像し、(c)高密度表面実装基板上に搭載さ
れる電子部品の下方で半田付けがなされる半田付け部に
はX線を投射して、ビジコン系カメラで撮像し、(d)
前記CCDカメラ及びビジコン系カメラからの出力信号
を情報処理装置で処理し、半田付検査データを得ること
を特徴とする高密度表面実装基板の半田付検査方法。
1. A soldering inspection method for a high-density surface-mounting substrate on which electronic components are mounted, comprising: (a) a soldering portion where solder is deposited on the front surface side of the electronic components mounted on the high-density surface-mounting substrate. Has a lead that extends to the outside of the electronic component mounted on the high-density surface-mounted substrate by irradiating visible light and picking up an image with a CCD camera. The exposed solder part other than the lead area of the soldering part is irradiated with visible light and is imaged by a CCD camera, and the lower part of the lead is projected by an X-ray and is imaged by a vidicon camera. c) An X-ray is projected onto the soldering portion where soldering is performed below the electronic components mounted on the high-density surface-mounted board, and an image is taken with a vidicon camera, (d)
A soldering inspection method for a high-density surface-mounting substrate, wherein output signals from the CCD camera and vidicon camera are processed by an information processing device to obtain soldering inspection data.
JP8901094A 1994-04-27 1994-04-27 Soldering inspection method for high density surface mounting substrate Withdrawn JPH07294450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8901094A JPH07294450A (en) 1994-04-27 1994-04-27 Soldering inspection method for high density surface mounting substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8901094A JPH07294450A (en) 1994-04-27 1994-04-27 Soldering inspection method for high density surface mounting substrate

Publications (1)

Publication Number Publication Date
JPH07294450A true JPH07294450A (en) 1995-11-10

Family

ID=13958920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8901094A Withdrawn JPH07294450A (en) 1994-04-27 1994-04-27 Soldering inspection method for high density surface mounting substrate

Country Status (1)

Country Link
JP (1) JPH07294450A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002533721A (en) * 1998-12-23 2002-10-08 イメージ・ガイディッド・テクノロジーズ・インコーポレイテッド Hybrid 3D probe tracked by multiple sensors
JP2004340631A (en) * 2003-05-13 2004-12-02 Sony Corp Substrate inspection device
JP2007192597A (en) * 2006-01-17 2007-08-02 Saki Corp:Kk Device for inspecting object to be inspected
JP2010122016A (en) * 2008-11-18 2010-06-03 Yamaha Motor Co Ltd Device and method for inspecting mounting state of component
CN108132264A (en) * 2017-12-19 2018-06-08 江苏伊莱尔电力科技有限公司 A kind of wave filter finished product defect inspection method method
CN112014404A (en) * 2020-08-27 2020-12-01 Oppo(重庆)智能科技有限公司 Component detection method, device, system, electronic equipment and storage medium

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002533721A (en) * 1998-12-23 2002-10-08 イメージ・ガイディッド・テクノロジーズ・インコーポレイテッド Hybrid 3D probe tracked by multiple sensors
JP2004340631A (en) * 2003-05-13 2004-12-02 Sony Corp Substrate inspection device
JP2007192597A (en) * 2006-01-17 2007-08-02 Saki Corp:Kk Device for inspecting object to be inspected
JP2010122016A (en) * 2008-11-18 2010-06-03 Yamaha Motor Co Ltd Device and method for inspecting mounting state of component
CN108132264A (en) * 2017-12-19 2018-06-08 江苏伊莱尔电力科技有限公司 A kind of wave filter finished product defect inspection method method
CN112014404A (en) * 2020-08-27 2020-12-01 Oppo(重庆)智能科技有限公司 Component detection method, device, system, electronic equipment and storage medium

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