JP3205392B2 - Cream solder printing inspection device and inspection method - Google Patents
Cream solder printing inspection device and inspection methodInfo
- Publication number
- JP3205392B2 JP3205392B2 JP18352092A JP18352092A JP3205392B2 JP 3205392 B2 JP3205392 B2 JP 3205392B2 JP 18352092 A JP18352092 A JP 18352092A JP 18352092 A JP18352092 A JP 18352092A JP 3205392 B2 JP3205392 B2 JP 3205392B2
- Authority
- JP
- Japan
- Prior art keywords
- cream solder
- printing
- area
- work
- criterion
- 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 - Lifetime
Links
Landscapes
- Screen Printers (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Manufacturing Of Printed Wiring (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子部品実装工程ライ
ンにおけるクリーム半田印刷の印刷状態を検査する装置
および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 an apparatus and a method for inspecting a printing state of cream solder printing in an electronic component mounting process line.
【０００２】[0002]
【従来の技術】近年、プリント基板上に実装される電子
部品はチップ化されると共に、微小化の傾向にある。そ
れに伴い電子部品実装工程ラインにおけるクリーム半田
印刷の印刷状態を人手により検査することは困難になっ
てきている。そこで、上記検査を自動的かつ高精度に行
うことができるように、次のようなクリーム半田印刷検
査装置が提案されている。2. Description of the Related Art In recent years, electronic components mounted on a printed circuit board have been formed into chips and tend to be miniaturized. Accordingly, it has become difficult to manually inspect the printing state of cream solder printing in an electronic component mounting process line. Therefore, the following cream solder printing inspection apparatus has been proposed so that the above inspection can be performed automatically and with high accuracy.
【０００３】図３に示すクリーム半田印刷検査システム
において、前工程のクリーム半田印刷機１から送られて
きたプリント基板２は半田印刷検査機３によって、その
クリーム半田印刷の状態の良否を検査され、良品は次工
程４に、不良品は基板ストッカー５に夫々送られる。In the cream solder printing inspection system shown in FIG. 3, the printed circuit board 2 sent from the cream solder printing machine 1 in the previous process is inspected by the solder printing inspection machine 3 for the quality of the cream solder printing. Non-defective products are sent to the next step 4, and defective products are sent to the substrate stocker 5, respectively.
【０００４】この際半田印刷機３は、クリーム半田の面
積を計測し、図４に示すように、クリーム半田印刷機１
に用いられるメタルマスクの設計値に基き設定されてい
る絶対判定基準Ａの所定の合格範囲にあるか否かを判断
し、合格範囲にあるものを良品（ｇで示す）、範囲外に
あるものを不良品（ｂで示す）と判定する。At this time, the solder printer 3 measures the area of the cream solder, and as shown in FIG.
It is determined whether or not it is within a predetermined acceptable range of the absolute judgment criterion A set based on the design value of the metal mask used for the test. Is determined to be defective (shown by b).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら上記のよ
うな検査システムでは、半田印刷検査機３は絶対判定基
準Ａに基いて良品、不良品を判定するだけであるので、
クリーム半田印刷機１の印刷状態の良否、傾向（具体的
にはにじみ傾向、かすれ傾向）の判断を的確に行うこと
が困難であった。However, in the above-described inspection system, the solder printing inspection machine 3 only determines non-defective products and defective products based on the absolute criterion A.
It was difficult to accurately determine the quality of the printing state of the cream solder printing machine 1 and the tendency (specifically, the bleeding tendency and the blurring tendency).
【０００６】そこで上記絶対判定基準Ａのほかに、図５
に示すように、クリーム半田印刷状態の良否を判定する
ための作業状況判定基準Ｌを設け、検査の結果この作業
状況判定基準Ｌの範囲外にあると判定されたときは、ク
リーム半田印刷の作業条件を変更して、不良品が出ない
ように処置することが考えられる。例えば、クリーム半
田の面積が作業状況判定基準Ｌの範囲より大きな面積で
あると判定されたときは、クリーム半田印刷の作業条件
をかすれ傾向側に変更することによって、不良品の発生
を防止することになる。Therefore, in addition to the absolute criterion A, FIG.
As shown in the figure, a work condition judgment criterion L for judging the quality of the cream solder printing state is provided, and when the result of the inspection is determined to be out of the range of the work condition judgment criterion L, the work of cream solder printing is performed. It is conceivable to change the conditions and take measures to prevent defective products. For example, when it is determined that the area of the cream solder is larger than the range of the work condition determination criterion L, it is possible to prevent the occurrence of defective products by changing the work conditions of the cream solder printing to the fading tendency side. become.
【０００７】しかし、上記作業状況判定基準Ｌをメタル
マスクの設計値に基いて作成しただけでは次のような問
題が生ずる。すなわち前記メタルマスクの製作時の加工
誤差によって、メタルマスクの開口部面積と設計値との
間に誤差が生じることは避け得ず、特に特定の開口部に
おいてその誤差が大きくあらわれることがしばしば生ず
るので、この特定の開口部に対応するクリーム半田面積
が作業状況判定基準Ｌの範囲外と判断された場合でも、
実際にはクリーム半田印刷は正しく行なわれていたり、
極端な場合には逆の傾向の印刷状態であったりする。However, the following problem occurs only when the work condition determination criterion L is created based on the design value of the metal mask. That is, it is inevitable that an error occurs between the area of the opening of the metal mask and the design value due to a processing error at the time of manufacturing the metal mask, and the error often appears particularly in a specific opening. Even when the cream solder area corresponding to this specific opening is determined to be out of the range of the work condition determination criterion L,
Actually, cream solder printing is performed correctly,
In extreme cases, the printing state may have the opposite tendency.
【０００８】又頻繁に特定の開口部に対応するクリーム
半田面積が作業状況判定基準Ｌの範囲外と判断された場
合、その原因追求のため、作業者がメタルマスクの開口
部の面積を光学顕微鏡などを用いて計測して、改善を図
ることが考えられるが、作業能率が大幅に低下するとい
う問題がある。When the area of the cream solder corresponding to a specific opening is frequently determined to be out of the range of the work condition determination criterion L, an operator determines the area of the opening of the metal mask with an optical microscope in order to investigate the cause. Although it is conceivable to improve the measurement by using such a method, there is a problem that the work efficiency is greatly reduced.
【０００９】[0009]
【課題を解決するための手段】本発明は上記問題点を解
決するため、メタルマスクの開口部を通してクリーム半
田印刷されたプリント基板を検査する際に、前記印刷さ
れたクリーム半田の面積を計測してクリーム半田印刷の
良否を検査するクリーム半田印刷検査装置において、ク
リーム半田印刷の良否を判定するため前記メタルマスク
の設計値に基いて作成された絶対判定基準と、クリーム
半田印刷の印刷状態の良否を判定するため前記絶対判定
基準の範囲内に作成された作業状況判定基準とを有する
と共に、前記クリーム半田面積の測定データに基き、前
記作業状況判定基準を変更する判定基準自動変更手段を
有することを特徴とする。In order to solve the above problems, the present invention measures the area of the printed cream solder when inspecting the printed circuit board on which the cream solder is printed through an opening of a metal mask. In the cream solder printing inspection device for inspecting the quality of the cream solder printing, an absolute judgment criterion created based on the design value of the metal mask to determine the quality of the cream solder printing, and the quality of the printing state of the cream solder printing. And a work condition judgment criterion created within the range of the absolute judgment criterion, and a judgment criterion automatic changing means for changing the work condition judgment criterion based on the cream solder area measurement data. It is characterized by.
【００１０】[0010]
【作用】特定の開口部に対応するクリーム半田面積のみ
が作業状況判定基準の範囲外になることが頻発したと
き、その開口部面積と設計値との間に加工誤差があると
推定でき、その特定の開口部に対する作業状況判定基準
がメタルマスクの設計値に基いている場合には、正しく
実際の状態を判断することはできない、と考えるべきで
ある。When the area of the cream solder corresponding to a specific opening is often out of the range of the work condition determination standard, it can be estimated that there is a processing error between the area of the opening and the design value. It should be considered that the actual state cannot be determined correctly when the work condition determination standard for a specific opening is based on the design value of the metal mask.
【００１１】本発明は、上記のような場合、クリーム半
田面積の測定データに基き、前記特定の開口部に対する
作業状況判定基準を実際の状態に則した判断がなされる
ように自動的に変更することができる。According to the present invention, in the case described above, the working condition determination standard for the specific opening is automatically changed based on the measurement data of the cream solder area so that the determination based on the actual state is made. be able to.
【００１２】[0012]
【実施例】本発明の一実施例を図面に基き説明する。An embodiment of the present invention will be described with reference to the drawings.
【００１３】前工程のクリーム半田印刷機１でクリーム
半田印刷されたプリント基板２を受入れ、クリーム半田
の面積を計測してクリーム半田印刷の良否を検査するク
リーム半田印刷検査機３については、すでに図３に基き
説明したとおりである。このクリーム半田印刷検査機３
は、図５に示すように、クリーム半田印刷の良否を判定
するためメタルマスクの設計値に基いて作成された絶対
判定基準Ａと、クリーム半田印刷の印刷状態を判定する
ためメタルマスクの設計値に基いて作成された作業状況
判定基準Ｌとを有している。The cream solder printing inspection machine 3 which receives the printed circuit board 2 on which the cream solder printing has been performed by the cream solder printing machine 1 in the preceding process, measures the area of the cream solder, and checks the quality of the cream solder printing has already been described. 3 as described above. This cream solder printing inspection machine 3
As shown in FIG. 5, an absolute criterion A created based on the design value of the metal mask for determining the quality of the cream solder printing, and a design value of the metal mask for determining the printing state of the cream solder printing And a work situation determination criterion L created based on the
【００１４】絶対判定基準Ａは、メタルマスクの設計値
Ｓ0 を中心として上限値Ｓ4 、下限値Ｓ1 が定められ、
この範囲Ｓ4 〜Ｓ1 内にあるものを良品（ｇ1 、ｇ2 で
示す。）、範囲外のものを不良品（ｂで示す）と判断
し、半田印刷検査機３は良品を次工程４に、不良品を基
板ストッカー５に送る。この絶対判定基準Ａは、絶対的
なものであって途中で変更されることはない。The absolute criterion A has an upper limit value S 4 and a lower limit value S 1 centered on the design value S 0 of the metal mask.
Those in this range S 4 to S 1 are judged as good (shown by g 1 and g 2 ), and those out of the range are judged as defective (shown by b). 4, the defective product is sent to the substrate stocker 5. This absolute criterion A is absolute and does not change midway.
【００１５】前記作業状況判定基準Ｌは、初期設定にお
いては、メタルマスクの設計値Ｓ0を中心として上限値
Ｓ3 、下限値Ｓ2 が定められ、この範囲Ｓ3 〜Ｓ2 内に
ある場合には、前工程でのクリーム半田印刷の作業状況
が正常で、範囲外の場合にはクリーム半田印刷の作業状
況が異常であると判断する。前記Ｓ3 〜Ｓ2 の範囲は絶
対判定基準Ａの範囲Ｓ4 〜Ｓ1 の範囲内に定められてい
る。In the initial setting, the upper limit value S 3 and the lower limit value S 2 are determined around the design value S 0 of the metal mask, and the work condition determination criterion L is within the range S 3 to S 2 . Then, it is determined that the work situation of the cream solder printing in the previous process is normal, and if the work situation is out of the range, the work situation of the cream solder printing is abnormal. The range of S 3 to S 2 is set within the range of S 4 to S 1 of the absolute criterion A.
【００１６】この作業状況判定基準Ｌによって、例えば
クリーム半田面積がＳ3 以上のものが頻発すれば、クリ
ーム半田印刷がにじみ傾向になっていることが分るの
で、クリーム半田印刷の作業条件をかすれ側に修正す
る。According to the work condition determination criterion L, if, for example, the cream solder area frequently exceeds S 3 , it can be understood that the cream solder printing tends to be blurred. Correct to the side.
【００１７】そして特定の開口部に対応するクリーム半
田面積のみが作業状況判定基準Ｌの範囲外になることが
測定されると、その開口部面積と設計値との間に加工誤
差があると推定し、作業状況判定基準Ｌの中心値を、Ｓ
0 とすることは誤りであると推定する。本実施例では、
このような場合に作業状況判定基準Ｌの中心値Ｓ0 を変
更するため、特定の開口部に対するクリーム半田面積の
測定結果を多数記憶集計して平均値Ｓ0 ′を演算し、こ
の平均値Ｓ0 ′を変更後の作業状況判定基準Ｌ′の中心
値とする判定基準自動変更手段６を有している（図
１）。When it is determined that only the cream solder area corresponding to the specific opening is out of the range of the work condition determination criterion L, it is estimated that there is a processing error between the opening area and the design value. Then, the central value of the work situation determination criterion L is represented by S
It is presumed that setting to 0 is an error. In this embodiment,
In such a case, in order to change the center value S 0 of the work condition determination criterion L, a large number of cream solder area measurement results for a specific opening are stored and totaled to calculate an average value S 0 ′. There is provided a criterion automatic changing means 6 for setting 0 'as the center value of the changed work situation criterion L' (FIG. 1).
【００１８】図２において、Ｐはメタルマスクの設計値
どおりに開口部が設計されている場合のクリーム半田面
積の分布モデル、Ｑはメタルマスクの開口部に加工誤差
がある場合のクリーム半田面積の分布モデルを示すが、
判定基準自動変更手段６は、実測されたメタルマスクの
開口部の開口面積に基いて、中心値Ｓ0 ′、上限
Ｓ3′、下限Ｓ2 ′の作業状況判定基準Ｌ′でクリーム
半田印刷の印刷状態の良否を判定することを可能として
いるのである。In FIG. 2, P is a distribution model of the cream solder area when the opening is designed in accordance with the design value of the metal mask, and Q is the cream solder area when the opening of the metal mask has a processing error. Here is the distribution model,
Criterion automatic change unit 6, based on the area of the opening of the actually measured metal mask, the center value S 0 ', the upper limit S 3', in the solder paste printing 'work situation determination reference L' of the lower limit S 2 It is possible to determine the quality of the printing state.
【００１９】上記実施例においては、作業状況判定基準
Ｌの範囲外になったものについてのみ、その基準Ｌを実
際に則した基準Ｌ′に変更するよう、判定基準自動変更
手段６を構成しているが、すべての開口部に対し、作業
状況判定基準Ｌの範囲内外にあることを問わず、作業状
況判定基準Ｌを変更しうるように構成してもよい。In the above-mentioned embodiment, the judgment reference automatic changing means 6 is configured to change the reference L to the reference L 'which is actually in accordance with only the work condition judgment reference L which is out of the range. However, the configuration may be such that the work status determination criterion L can be changed for all the openings regardless of whether they are within or outside the range of the work status determination criterion L.
【００２０】[0020]
【発明の効果】本発明によれば、クリーム半田印刷機の
印刷状態の良品、不良品の判定を行うことができるのみ
ならず、メタルマスクの加工誤差に影響されずに、的確
にクリーム半田印刷の作業状態を判定することができ、
クリーム半田印刷の作業条件を適正なものとすることに
貢献するクリーム半田印刷検査装置および検査方法を提
供することができる。According to the present invention, it is possible not only to judge whether the printing state of the cream solder printing machine is good or defective, but also to accurately print the cream solder without being affected by the processing error of the metal mask. Can determine the work state of
It is possible to provide a cream solder printing inspection apparatus and an inspection method that contribute to making the operating conditions of cream solder printing appropriate.
【図１】本発明の一実施例を示すブロック図。FIG. 1 is a block diagram showing one embodiment of the present invention.
【図２】クリーム半田面積の分布モデルを示すグラフ。FIG. 2 is a graph showing a distribution model of a cream solder area.
【図３】実装工程ライン上の検査システムを示すブロッ
ク図。FIG. 3 is a block diagram showing an inspection system on a mounting process line.
【図４】絶対判定基準を示すグラフ。FIG. 4 is a graph showing absolute criteria.
【図５】絶対判定基準と、作業状況判定基準とを示すグ
ラフ。FIG. 5 is a graph showing an absolute criterion and a work situation criterion.
１ クリーム半田印刷機 ２ プリント基板 ３ 半田印刷検査機 ６ 判定基準自動変更手段 Ａ 絶対判定基準 Ｌ 作業状況判定基準 DESCRIPTION OF SYMBOLS 1 Cream solder printing machine 2 Printed circuit board 3 Solder printing inspection machine 6 Judgment standard automatic change means A Absolute judgment standard L Work situation judgment standard
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−48248（ＪＰ，Ａ) 特開 昭63−147271（ＪＰ，Ａ) 特許3071569（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 21/84 - 21/958 H05K 3/32 - 3/34 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-48248 (JP, A) JP-A-63-147271 (JP, A) Patent 3071569 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) G01N 21/84-21/958 H05K 3/32-3/34
Claims (4)
半田印刷されたプリント基板を検査する際に、前記印刷
されたクリーム半田の面積を計測してクリーム半田印刷
の良否を検査するクリーム半田印刷検査装置において、
クリーム半田印刷の良否を判定するため前記メタルマス
クの設計値に基いて作成された絶対判定基準と、クリー
ム半田印刷の印刷状態の良否を判定するため前記絶対判
定基準の範囲内に作成された作業状況判定基準とを有す
ると共に、前記クリーム半田面積の測定データに基き、
前記作業状況判定基準を変更する判定基準自動変更手段
を有することを特徴とするクリーム半田印刷検査装置。1. Cream through an opening of a metal mask
When inspecting a printed circuit board printed with solder,
In the cream solder printing inspection device that measures the area of the cream solder that has been tested and checks the quality of the cream solder printing,
An absolute criterion created based on the design value of the metal mask to determine the quality of solder paste printing, the absolute-size to determine the quality of the print state of the solder paste printing
With the work situation judgment criteria created within the range of the standard , based on the measurement data of the cream solder area,
A cream solder printing inspection device, comprising: a determination criterion automatic change unit that changes the work situation determination criterion.
特定の開口部に対応するクリーム半田面積のみが作業状
況判定基準の範囲外になる場合、前記計測されたクリー
ム半田面積に基き、前記特定の開口部に対する作業状況
判定基準を変更する請求項１記載のクリーム半田印刷検
査装置。2. When the cream solder area corresponding only to the measured specific opening is out of the range of the work condition determination reference, the determination criterion automatic changing means performs the identification based on the measured cream solder area. 2. The cream solder printing inspection device according to claim 1, wherein a work condition determination criterion for said opening is changed.
たクリーム半田の面積が、前記作業状況判定基準の下限
値以下であればかすれ側と判定しクリーム半田印刷の作
業条件をにじみ側に変更し、前記作業状況判定基準の上
限値以上であればにじみ側と判定しクリーム半田印刷の
作業条件をかすれ側に変更する請求項１記載のクリーム
半田印刷検査装置。3. The automatic determination criterion changing means determines that the area of the measured cream solder is the blur side if the measured area of the solder is equal to or less than a lower limit value of the work status determination criterion, and changes the operation condition of the cream solder printing to the bleed side. 2. The cream solder printing inspection device according to claim 1, wherein if it is equal to or more than the upper limit value of the work condition determination criterion, it is determined to be a bleeding side and the working condition of cream solder printing is changed to a faint side.
半田印刷されたプリント基板を検査する際に、クリーム
半田の面積を計測してクリーム半田印刷の良否を検査す
るクリーム半田印刷検査方法において、前記メタルマス
クの設計値に基いて作成された絶対判定基準と、クリー
ム半田印刷の印刷状況を判定するため前記絶対判定基準
の範囲内に作成された作業状況判定基準とを備え、前記
計測されたクリーム半田の面積が、前記作業状況判定基
準の下限値以下であればかすれ側と判定しクリーム半田
印刷の作業条件をにじみ側に変更し、前記作業状況判定
基準の上限値以上であればにじみ側と判定しクリーム半
田印刷の作業条件をかすれ側に変更し、前記計測された
特定の開口部に対応するクリーム半田面積のみが作業状
況判定基準の範囲外になる場合、前記計測されたクリー
ム半田面積に基き、前記特定の開口部に対する作業状況
判定基準を変更するクリーム半田印刷検査方法。4. A cream solder print inspection method for inspecting the quality of cream solder printing by measuring the area of cream solder when inspecting a printed circuit board printed with cream solder through an opening of a metal mask. An absolute judgment criterion created based on the design value of, and a work situation judgment criterion created within the range of the absolute judgment criterion for judging the printing situation of cream solder printing, If the area is equal to or less than the lower limit of the work condition determination criterion, it is determined to be a blur side and the work condition of cream solder printing is changed to a bleed side, and if the work condition determination criterion is equal to or more than the upper limit, it is determined to be a bleed side. Change the work conditions for cream solder printing to the blurred side, and only the cream solder area corresponding to the measured specific opening is out of the range of the work condition determination standard. In the cream solder printing inspection method, based on the measured cream solder area, a work condition determination criterion for the specific opening is changed.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18352092A JP3205392B2 (en) | 1992-07-10 | 1992-07-10 | Cream solder printing inspection device and inspection method |
| US08/083,700 US5555316A (en) | 1992-06-30 | 1993-06-30 | Inspecting apparatus of mounting state of component or printing state of cream solder in mounting line of electronic component |
| US08/657,785 US5991435A (en) | 1992-06-30 | 1996-05-31 | Inspecting apparatus of mounting state of component or printing state of cream solder in mounting line of electronic component |
| US09/327,555 US6167149A (en) | 1992-06-30 | 1999-06-08 | Inspecting apparatus of mounting state of component or printing state of cream solder in mounting line of electronic component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18352092A JP3205392B2 (en) | 1992-07-10 | 1992-07-10 | Cream solder printing inspection device and inspection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0627033A JPH0627033A (en) | 1994-02-04 |
| JP3205392B2 true JP3205392B2 (en) | 2001-09-04 |
Family
ID=16137289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18352092A Expired - Lifetime JP3205392B2 (en) | 1992-06-30 | 1992-07-10 | Cream solder printing inspection device and inspection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3205392B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6119592A (en) * | 1996-07-03 | 2000-09-19 | Matsushita Electric Industrial Co., Ltd. | Apparatus for screen printing having a belt screen and locking frame |
| JP4869776B2 (en) | 2006-04-28 | 2012-02-08 | ヤマハ発動機株式会社 | Printing inspection apparatus and printing apparatus |
| JP6268501B2 (en) | 2013-04-16 | 2018-01-31 | パナソニックＩｐマネジメント株式会社 | Disk cartridge and disk device |
-
1992
- 1992-07-10 JP JP18352092A patent/JP3205392B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0627033A (en) | 1994-02-04 |
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