JP3582894B2 - Screen printing method - Google Patents

Screen printing method Download PDF

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Publication number
JP3582894B2
JP3582894B2 JP16519495A JP16519495A JP3582894B2 JP 3582894 B2 JP3582894 B2 JP 3582894B2 JP 16519495 A JP16519495 A JP 16519495A JP 16519495 A JP16519495 A JP 16519495A JP 3582894 B2 JP3582894 B2 JP 3582894B2
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JP
Japan
Prior art keywords
screen
squeegee
printing
printing material
screen printing
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
JP16519495A
Other languages
Japanese (ja)
Other versions
JPH0911440A (en
Inventor
昭彦 和智
信幸 柿島
昇 西川
征志郎 梁池
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.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial 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 Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP16519495A priority Critical patent/JP3582894B2/en
Publication of JPH0911440A publication Critical patent/JPH0911440A/en
Application granted granted Critical
Publication of JP3582894B2 publication Critical patent/JP3582894B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/10Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
    • H05K3/1216Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by screen printing or stencil printing

Description

【0001】
【産業上の利用分野】
本発明は、スクリーン印刷方法に関するものである。
【0002】
【従来の技術】
スクリーン印刷機を示す図3〜図5と、従来のスクリーン印刷方法のフローチャートを示す図6とに基づいてスクリーン印刷方法の従来例を説明する。
【0003】
スクリーン印刷機は認識部Aと印刷部Bとに分かれており、図6のステップ#11において、先ず、回路基板2が認識部Aにあるステージ1に搬入され機械的に位置規制される。
【0004】
ステップ#12において、認識部Aにあるカメラ5が、前記回路基板2に設けられているマーク4、4を認識し、画像処理装置14が、前記の機械的に規制した回路基板2の位置のずれ量を計算し、スクリーン印刷する際に必要な補正量を算出し、算出結果をコントロール部15に記憶させる。
【0005】
ステップ#13において、ステージ1を印刷部Bに移動し、NC部13が、コントロール部15が記憶している前記補正量に基づいて、スクリーン部6に取り付けられたモータ7、8、9を制御し、それぞれX、Y、θ方向に駆動して、前記の移動してきた回路基板2とスクリーン部6とを一致させる。
【0006】
ステップ#14において、コントロール部15が、モータ3の駆動を制御して予め設定してある上昇ストロークだけステージ1を上昇させ、モータ11の駆動を制御してスキージ10を予め設定してある下降ストロークだけ下降させて、スキージ10が所定圧力でスクリーン部6に当接するようにし、クリーム半田12をスクリーン部6に押し付けながら右方向あるいは左方向に移動し、クリーム半田12をスクリーン部6を通して回路基板2にスクリーン印刷する。
【0007】
ステップ#15において、上記の印刷が終了すると、コントロール部15によるモータ3の制御により、ステージ1を微速で下降させ、回路基板2がスクリーン部6から離れたら、コントロール部15によるモータ3の制御により、ステージ1を高速で下降させる。
【0008】
ステップ#16において、クリーム半田が印刷された回路基板2を搬出する。
【0009】
ステップ#17において、予定数が完了したか否かを判断し、完了であれば終了し、否であればステップ#11に戻る。
【0010】
【発明が解決しようとする課題】
しかし、上記の従来例の構成では、スクリーン印刷後に、スキージ10をスクリーン部6に押し付けたままの状態でステージ1を下降させるので、モータ3の駆動でステージ1が徐々に下降する際に、スクリーン部6を押さえるスキージ10の力でスクリーン部6が傾き、その傾きによって、回路基板2の上に印刷されたクリーム半田の形状が崩れて、半田のかすれ、半田のにじみが発生することがあるという問題点を有していた。
【0011】
本発明は、上記の問題点を解決し、スクリーン部の傾きが無く、半田のかすれや半田のにじみが発生しないスクリーン印刷方法の提供を課題とする。
【0012】
【課題を解決するための手段】
本発明のスクリーン印刷方法は、上記の課題を解決するために、スクリーン印刷を開始する前に、予め、基準位置のスキージ先端から、スキージが押さえない状態のスクリーン部上面までの距離だけスキージを移動させる量であるストロークHと、前記基準位置からスキージがスクリーン部に適正な圧力をかけてスクリーン部上にある印刷材料を被印刷物に印刷するのに最適な位置までスキージを下方へ移動させる量であるストロークhとを設定し、これらをコントロール部に記憶させ、スクリーン印刷に際し、先ず被印刷物を上昇させてスクリーン部のスクリーン下面に接触させ、次いでスキージを前記基準位置からストロークh下降させて前記スクリーン部のスクリーン上に適正な圧力をかけて当接させ、右方向或いは左方向に移動させて前記スクリーン上の印刷材料を前記被印刷物に印刷し、スキージの印刷動作終了後に、先ず、前記スキージを(h−H)分だけ上昇させ、その後に、前記の印刷された被印刷物を下降させることを特徴とする。
【0013】
【作用】
本発明のスクリーン印刷方法は、スキージの印刷動作終了後に、先ず、スキージを押し込み量(h−H)分だけ上昇させ、前記スキージの前記上昇後に、印刷された被印刷物を下降させることにより、被印刷物をスクリーン部のスクリーンから離す際に、前記スキージがスクリーン部を押さえないようになっているので、スクリーン部のスクリーンの傾きが発生しなくなり、被印刷物上に印刷された印刷材料の形状が安定し、印刷材料のかすれ、印刷材料のにじみが無くなる。
【0014】
【実施例】
本発明のスクリーン印刷方法を使用するスクリーン印刷機の実施例を図1〜図5に基づいて説明する。
【0015】
本実施例のスクリーン印刷機の構成は、印刷後にスキージを上昇させる機構を除けば、図3〜図5に示す従来例のスクリーン印刷機の構成と同じであり、本実施例の印刷までのフロチャート、即ち、図2のフロチャートのステップ#1〜ステップ#4は、従来例のフロチャートを示す図6のステップ#11〜ステップ#14と同じなので、本実施例のフローチャートを示す図2のステップ#4までは説明を省略する。
【0016】
そして、本実施例の特徴である、図2のステップ#5のスキージ部上昇工程を、図1、図2及び従来例で説明した図3〜図5に基づいて説明する。
【0017】
スクリーン印刷を開始する前に、予め、図1に示すように、スキージ10が基準位置から下降しスキージ10の先端がスクリーン部6に接触するまでの、スキージ10の下方への駆動量であるストロークHと、基準位置からスキージ10がスクリーン部6に適正な圧力をかけてスクリーン部6上にあるクリーム半田を回路基板2に印刷するのに最適な位置までの、スキージ10の下方への駆動量であるストロークhとを設定し、これらをコントロール部15に記憶させる。この場合、h−Hが、スキージ10によるスクリーン部6の押し込み量である。
【0018】
図2のステップ#5において、スキージ10のスクリーン印刷動作が終了すると、コントロール部15は、モータ11を制御して、前記押し込み量h−Hだけ、スキージ10を上昇させてスキージ10がスクリーン部6を押さえないようにしてから、モータ3を制御して、ステージ1を微速で下降させ、回路基板2がスクリーン部6から離れたら、コントロール部15によるモータ3の制御により、ステージ1を高速で下降させる。
【0019】
上記のようにすると、ステージ1上の回路基板2をスクリーン部6から離す際に、スキージ10がスクリーン部6を押さえないようになっているので、押し込み量h−H分によるスクリーン部6の傾きが発生しなくなり、回路基板2上に印刷されたクリーム半田の形状が安定し、半田のかすれ、半田のにじみが無くなり、特に、実装される電子部品が小型化され実装密度が高くなった回路基板の品質向上が可能になる。
【0020】
本実施例の動作を示す図2のステップ#6〜ステップ#8は、従来例の動作を示すステップ#15〜ステップ#17と同じなので説明を省略する。
【0021】
【発明の効果】
本発明のスクリーン印刷方法は、被印刷物上に印刷された印刷材料の形状が安定し、印刷材料のかすれ、印刷材料のにじみが無くなるという効果を奏し、特に、実装される電子部品が小型化され実装密度が高くなった回路基板の品質向上が可能になるという効果を奏する。
【図面の簡単な説明】
【図1】本発明の動作を示す模式図である。
【図2】本発明のスクリーン印刷方法の動作を示すフロチャートである。
【図3】スクリーン印刷機の構成を示す側面図である。
【図4】スクリーン印刷機の構成を示す平面図である。
【図5】スクリーン印刷機の構成を示すブロック図である。
【図6】従来例のスクリーン印刷方法の動作を示すフロチャートである。
【符号の説明】
1 ステージ
2 回路基板
3 モータ
4 マーク
5 カメラ
6 スクリーン部
7 モータ
8 モータ
9 モータ
10 スキージ
11 モータ
12 クリーム半田
[0001]
[Industrial applications]
The present invention relates to a screen printing how.
[0002]
[Prior art]
A conventional example of a screen printing method will be described with reference to FIGS. 3 to 5 showing a screen printing machine and FIG. 6 showing a flowchart of a conventional screen printing method.
[0003]
The screen printing machine is divided into a recognition unit A and a printing unit B. In step # 11 in FIG. 6, first, the circuit board 2 is loaded into the stage 1 in the recognition unit A and mechanically position-controlled.
[0004]
In step # 12, the camera 5 in the recognition unit A recognizes the marks 4 and 4 provided on the circuit board 2, and the image processing device 14 determines the position of the mechanically regulated circuit board 2 The shift amount is calculated, the correction amount required for screen printing is calculated, and the calculation result is stored in the control unit 15.
[0005]
In step # 13, the stage 1 is moved to the printing unit B, and the NC unit 13 controls the motors 7, 8, 9 attached to the screen unit 6 based on the correction amount stored in the control unit 15. Then, the circuit board 2 is moved in the X, Y, and θ directions to match the moved circuit board 2 with the screen unit 6.
[0006]
In step # 14, the control unit 15 controls the driving of the motor 3 to raise the stage 1 by a predetermined rising stroke, and controls the driving of the motor 11 to move the squeegee 10 to a predetermined lowering stroke. The cream solder 12 is moved rightward or leftward while pressing the cream solder 12 against the screen portion 6, and the cream solder 12 is moved through the screen portion 6. Screen printing.
[0007]
In step # 15, when the above printing is completed, the stage 1 is lowered at a very low speed by the control of the motor 3 by the control unit 15, and when the circuit board 2 is separated from the screen unit 6, the control of the motor 3 by the control unit 15 is performed. Then, the stage 1 is lowered at high speed.
[0008]
In step # 16, the circuit board 2 on which the cream solder is printed is carried out.
[0009]
In step # 17, it is determined whether or not the planned number has been completed. If the planned number has been completed, the process ends, and if not, the process returns to step # 11.
[0010]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, the stage 1 is lowered while the squeegee 10 is pressed against the screen unit 6 after screen printing. The screen portion 6 is tilted by the force of the squeegee 10 holding the portion 6, and the tilt causes the shape of the cream solder printed on the circuit board 2 to be distorted, which may cause blurring of the solder and bleeding of the solder. Had problems.
[0011]
The present invention is to solve the above problems, the inclination of the screen portion without an object to provide a screen printing how the solder blur and solder bleeding does not occur.
[0012]
[Means for Solving the Problems]
According to the screen printing method of the present invention, in order to solve the above-mentioned problem, before starting screen printing , the squeegee is moved in advance by a distance from the squeegee tip at the reference position to the upper surface of the screen portion where the squeegee is not pressed. The stroke H, which is the amount to be applied, and the amount by which the squeegee moves the squeegee downward from the reference position to the optimal position for printing the printing material on the screen by applying an appropriate pressure to the screen to the printing material. A certain stroke h is set, and these are stored in the control unit. In screen printing, first, the printing material is raised and brought into contact with the lower surface of the screen of the screen unit, and then the squeegee is lowered by the stroke h from the reference position to reduce the screen. Apply appropriate pressure on the screen of the part and move it to the right or left. Printing the printing material on the screen on the printing material, and after the squeegee printing operation is completed, first raise the squeegee by (h-H), and then lower the printed printing material. It is characterized by.
[0013]
[Action]
Screen printing method of the present invention, after the printing operation is finished the squeegee, first, the amount of pushing the squeegee (h-H) content only raised, after the rise of the pre-Symbol squeegee, by lowering the printed printing material, When the printed material is separated from the screen of the screen portion, the squeegee does not press the screen portion, so that the screen of the screen portion does not tilt, and the shape of the printing material printed on the printed material is reduced. Stable, no blurring of printing material, no bleeding of printing material.
[0014]
【Example】
An embodiment of a screen printing machine using the screen printing method of the present invention will be described with reference to FIGS.
[0015]
The configuration of the screen printing machine of the present embodiment is the same as the configuration of the conventional screen printing machine shown in FIGS. 3 to 5 except for a mechanism for raising the squeegee after printing. Since steps # 1 to # 4 of the flowchart of FIG. 2 are the same as steps # 11 to # 14 of FIG. 6 showing the flowchart of the conventional example, the flowchart of FIG. The description up to step # 4 is omitted.
[0016]
Then, the squeegee portion raising process of step # 5 in FIG. 2, which is a feature of the present embodiment, will be described based on FIGS. 1, 2 and FIGS.
[0017]
Before starting the screen printing, as shown in FIG. 1 , a stroke, which is a driving amount of the squeegee 10 downward until the squeegee 10 descends from the reference position and the tip of the squeegee 10 comes into contact with the screen portion 6. H and the amount of downward drive of the squeegee 10 from the reference position to the position where the squeegee 10 applies an appropriate pressure to the screen unit 6 and prints the cream solder on the screen unit 6 on the circuit board 2. set the stroke h is, and stores them in the controller 15. In this case, h-H is a pushing amount of the screen section 6 by the squeegee 10.
[0018]
In step # 5 in FIG. 2, the screen printing operation of the squeegee 10 is completed, the control unit 15 controls the motor 11, the push amount h-H only, raising the squeegee 10 squeegee 10 screenshot 6 After controlling the motor 3, the stage 1 is lowered at a very low speed by controlling the motor 3, and when the circuit board 2 is separated from the screen 6, the control of the motor 3 by the control unit 15 lowers the stage 1 at a high speed. Let it.
[0019]
When as described above, when separating the circuit board 2 on the stage 1 from the screen section 6, since the squeegee 10 is prevented pressing the screen section 6, the inclination of the screen section 6 by pressing amount h-H content No longer occurs, the shape of cream solder printed on the circuit board 2 becomes stable, the blur of the solder and the bleeding of the solder are eliminated, and in particular, a circuit board in which electronic components to be mounted are downsized and the mounting density is increased. Quality can be improved.
[0020]
Steps # 6 to # 8 in FIG. 2 showing the operation of the present embodiment are the same as steps # 15 to # 17 showing the operation of the conventional example, and a description thereof will be omitted.
[0021]
【The invention's effect】
The screen printing method of the present invention has the effect of stabilizing the shape of the printing material printed on the printing material, fading the printing material, and eliminating bleeding of the printing material. There is an effect that the quality of the circuit board having the increased mounting density can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the operation of the present invention .
FIG. 2 is a flowchart showing the operation of the screen printing method of the present invention .
FIG. 3 is a side view showing the configuration of the screen printing machine.
FIG. 4 is a plan view illustrating a configuration of a screen printing machine.
FIG. 5 is a block diagram illustrating a configuration of a screen printing machine.
FIG. 6 is a flowchart showing the operation of a conventional screen printing method.
[Explanation of symbols]
Reference Signs List 1 stage 2 circuit board 3 motor 4 mark 5 camera 6 screen unit 7 motor 8 motor 9 motor 10 squeegee 11 motor 12 cream solder

Claims (2)

スクリーン印刷を開始する前に、予め、基準位置のスキージ先端から、スキージが押さえない状態のスクリーン部上面までの距離だけスキージを移動させる量であるストロークHと、前記基準位置からスキージがスクリーン部に適正な圧力をかけてスクリーン部上にある印刷材料を被印刷物に印刷するのに最適な位置までスキージを下方へ移動させる量であるストロークhとを設定し、これらをコントロール部に記憶させ、スクリーン印刷に際し、先ず被印刷物を上昇させてスクリーン部のスクリーン下面に接触させ、次いでスキージを前記基準位置からストロークh下降させて前記スクリーン部のスクリーン上に適正な圧力をかけて当接させ、右方向或いは左方向に移動させて前記スクリーン上の印刷材料を前記被印刷物に印刷し、スキージの印刷動作終了後に、先ず、前記スキージを(h−H)分だけ上昇させ、その後に、前記の印刷された被印刷物を下降させることを特徴とするスクリーン印刷方法。Before starting the screen printing, in advance, a stroke H that is an amount to move the squeegee from the tip of the squeegee at the reference position to the upper surface of the screen portion where the squeegee is not pressed, and the squeegee is moved from the reference position to the screen portion A stroke h, which is an amount by which the squeegee is moved downward to an optimal position for printing the printing material on the screen portion on the printing material by applying an appropriate pressure, is set, and these are stored in the control portion. At the time of printing, first, the printing material is raised to contact the lower surface of the screen of the screen portion, and then the squeegee is lowered by a stroke h from the reference position to abut on the screen of the screen portion by applying an appropriate pressure, to the right. Alternatively, the printing material on the screen is printed on the printing material by After the printing operation ends, firstly, the squeegee the (h-H) content only raised, then, a screen printing method characterized by lowering the printed printing material of the. 印刷材料がクリーム半田であり、被印刷物が回路基板である請求項1記載のスクリーン印刷方法。2. The screen printing method according to claim 1, wherein the printing material is a cream solder, and the substrate is a circuit board.
JP16519495A 1995-06-30 1995-06-30 Screen printing method Expired - Fee Related JP3582894B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16519495A JP3582894B2 (en) 1995-06-30 1995-06-30 Screen printing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16519495A JP3582894B2 (en) 1995-06-30 1995-06-30 Screen printing method

Publications (2)

Publication Number Publication Date
JPH0911440A JPH0911440A (en) 1997-01-14
JP3582894B2 true JP3582894B2 (en) 2004-10-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP16519495A Expired - Fee Related JP3582894B2 (en) 1995-06-30 1995-06-30 Screen printing method

Country Status (1)

Country Link
JP (1) JP3582894B2 (en)

Also Published As

Publication number Publication date
JPH0911440A (en) 1997-01-14

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