JP2001130160A - Method and device for screen printing, screen mask used in the method and device and circuit substrate thereof - Google Patents

Method and device for screen printing, screen mask used in the method and device and circuit substrate thereof

Info

Publication number
JP2001130160A
JP2001130160A JP31687499A JP31687499A JP2001130160A JP 2001130160 A JP2001130160 A JP 2001130160A JP 31687499 A JP31687499 A JP 31687499A JP 31687499 A JP31687499 A JP 31687499A JP 2001130160 A JP2001130160 A JP 2001130160A
Authority
JP
Japan
Prior art keywords
screen mask
printing
printing material
screen
opening
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.)
Pending
Application number
JP31687499A
Other languages
Japanese (ja)
Inventor
Masaru Yamauchi
大 山内
Masahiro Taniguchi
昌弘 谷口
Toshinori Mimura
敏則 三村
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 Holdings Corp
Original Assignee
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP31687499A priority Critical patent/JP2001130160A/en
Publication of JP2001130160A publication Critical patent/JP2001130160A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To eliminate the leftover of scraping for a printing material while improving transfer properties for carrying out the high quality printing of high opening density of an opening of a screen mask and the printing of different film thickness. SOLUTION: In a screen printing method, the upper face 2a of a printed matter 2 to be printed is faced to the lower face 1b of a screen mask 1, and a squeegee 4 is moved on the upper face 1a of the screen mask 1 to fill a printing material 3 in an opening 1c formed on the screen mask 1, and the material 2 to be printed is separated from the screen mask 1 to transfer the printing material 3 onto the printed matter 2 to be printed, and a recess 5 is formed on the lower face 1b of the screen mask 1, while a protrusion 6 is formed to be overlapped with a recess 5 on the upper face 2a of the material 2 to be printed to be matched with the recess 5, and the printing material 3 filled in an opening 1c formed on the recess 5 is transferred onto the protrusion 6.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は主として、接着剤や
クリーム半田や導電ペースト等の印刷材料を、スクリー
ンマスクを介して、回路基板等の被印刷物に印刷するス
クリーン印刷に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to screen printing for printing a printing material such as an adhesive, a cream solder or a conductive paste on a printed material such as a circuit board through a screen mask.

【0002】[0002]

【従来の技術】従来のスクリーン印刷方法を、図7と図
8を参照して説明する。このスクリーン印刷方法は図7
に示すように、スクリーンマスク1の下面1bに回路基
板等の被印刷物2の上面2aを対向させ、スクリーンマ
スク1の上面1aでスキージ4を矢印Aで示すように水
平方向に移動させることにより、印刷材料3をスクリー
ンマスク1に設けられた開口部1c(図8)に充填す
る。その後、スクリーンマスク1から被印刷物2を矢印
Bで示すように離すことによって、印刷材料3を被印刷
物2上へ転写することによって印刷を行う。スクリーン
マスク1と被印刷物2は接触しているのが好適である
が、接触していない場合は、印刷時にスキージ4がスク
リーンマスク1を押圧しながら移動することによって接
触させるようにする。
2. Description of the Related Art A conventional screen printing method will be described with reference to FIGS. This screen printing method is shown in FIG.
As shown in FIG. 1, the upper surface 2a of the substrate 2 such as a circuit board is opposed to the lower surface 1b of the screen mask 1, and the squeegee 4 is moved in the horizontal direction as indicated by an arrow A on the upper surface 1a of the screen mask 1. The printing material 3 is filled in the openings 1c (FIG. 8) provided in the screen mask 1. Thereafter, printing is performed by transferring the printing material 3 onto the printing material 2 by separating the printing material 2 from the screen mask 1 as indicated by an arrow B. It is preferable that the screen mask 1 and the printing medium 2 are in contact with each other, but if they are not in contact with each other, the squeegee 4 moves while pressing the screen mask 1 during printing so as to make contact.

【0003】スクリーンマスク1と被印刷物2が接触し
ている場合の拡大図を、図8(a)(b)に示す。図8
(a)は、スクリーンマスク1の厚みが一定である場合
を示している。一般的にはこのようにスクリーンマスク
1の厚みが一定であるが、開口部の開口面積が小さいた
めに少ない印刷材料でも良く、かつスクリーンマスク1
から被印刷物2への印刷材料3の転写性を向上させたい
場合は、スクリーンマスク1の厚みを小にするためその
部分だけを図8(b)に示すように、スクリーンマスク
1の上面1aを掘り下げて凹部25を設けることがあ
る。
FIGS. 8A and 8B are enlarged views of the case where the screen mask 1 and the print substrate 2 are in contact with each other. FIG.
(A) has shown the case where the thickness of the screen mask 1 is constant. Generally, the thickness of the screen mask 1 is constant as described above. However, since the opening area of the opening is small, a small printing material may be used.
When it is desired to improve the transferability of the printing material 3 from the printing material 3 to the printing substrate 2, only the portion of the screen mask 1 is reduced as shown in FIG. In some cases, the recess 25 is provided by being dug down.

【0004】前記凹部25を形成することによってスク
リーンマスク1の厚みを部分的に薄くすると印刷材料3
の転写性が向上する理由を、図9を参照して説明する。
図9において、スクリーンマスク1の開口部1cの側面
積をS、開口部1cの底面積(開口面積)をTとする
と、側面積Sと底面積Tの比であるS/Tをアスペクト
比と云う。このアスペクト比の値が小さい方ほど印刷材
料3の転写性が向上する。このアスペクト比に関し、側
面積Sは、印刷材料3がスクリーンマスク1(開口部1
cの側面)から離れ被印刷物2に転写移動される際に、
印刷材料3がスクリーンマスク1から受ける抵抗を、底
面積Tは、印刷材料3が被印刷物2に接合するための粘
着性を、それぞれ疑似的に示している。このアスペクト
比は、スクリーンマスク1を被印刷物2から離し転写す
る(版離れとも云う)際の指標にすることができる。
When the thickness of the screen mask 1 is partially reduced by forming the recess 25, the printing material 3
The reason why the transferability of the image is improved will be described with reference to FIG.
In FIG. 9, when the side area of the opening 1c of the screen mask 1 is S and the bottom area (opening area) of the opening 1c is T, S / T, which is the ratio of the side area S to the bottom area T, is defined as the aspect ratio. say. The transferability of the printing material 3 is improved as the value of the aspect ratio is smaller. Regarding this aspect ratio, the side area S is such that the printing material 3 is the screen mask 1 (the opening 1).
c side surface), and is transferred and transferred to the printing substrate 2,
The resistance that the printing material 3 receives from the screen mask 1 and the bottom area T simulate the adhesiveness for bonding the printing material 3 to the substrate 2, respectively. This aspect ratio can be used as an index when the screen mask 1 is transferred away from the printing substrate 2 (also referred to as plate separation).

【0005】[0005]

【発明が解決しようとする課題】しかしながら上記従来
のスクリーン印刷方法では、印刷材料3の転写性を向上
させるためにスクリーンマスク1の上面1aを部分的に
掘り下げて形成している凹部25の角に、上面1aを移
動するスキージ4が引っ掛かり、スキージ4に亀裂等の
破損を生じることがある。
However, in the above-mentioned conventional screen printing method, in order to improve the transferability of the printing material 3, the upper surface 1a of the screen mask 1 is partially dug down into the corner of the concave portion 25. The squeegee 4 moving on the upper surface 1a may be caught and the squeegee 4 may be damaged such as a crack.

【0006】また凹部25に入り込んた印刷材料3を、
スキージ4で全て掻き取れずに凹部25内に印刷材料3
が残ることや、スキージ4が凹部25の上面からスクリ
ーンマスク1の上面1aに戻る際、その反動でスキージ
4が変形してしまい、それ以後のスクリーンマスク1の
上面1aの印刷材料3を掻き取れないことがある。これ
ら印刷材料3の掻き残しは、印刷品質に悪影響を与える
という問題がある。この問題を防ぐために、掻き残りが
発生する部分には開口部1cを設けないことで対処でき
るが、これでは開口部1cどうしを近くに形成すること
ができずに開口密度の高い印刷ができなくなるという問
題が生じる。
The printing material 3 that has entered the recess 25 is
The printing material 3 is left in the recess 25 without being completely scraped off by the squeegee 4.
When the squeegee 4 returns to the upper surface 1a of the screen mask 1 from the upper surface of the recess 25, the squeegee 4 is deformed by the reaction, and the printing material 3 on the upper surface 1a of the screen mask 1 is scraped off thereafter. There may not be. There is a problem that the unscraped print material 3 adversely affects the print quality. In order to prevent this problem, it can be dealt with by not providing the openings 1c at the portions where the unscraped portions are generated. However, in this case, the openings 1c cannot be formed close to each other and printing with a high opening density cannot be performed. The problem arises.

【0007】そこで本発明は上記問題に鑑み、転写性を
向上させることができるにもかかわらず、印刷材料の掻
き残しを無くすと共に、スクリーンマスクの開口部の開
口密度の高い印刷や膜厚の異なった印刷を高品質に行う
ことができるスクリーン印刷方法やその装置を提供する
ことを目的とする。
In view of the above problems, the present invention eliminates unscraped printing material, improves the printing density of the openings in the openings of the screen mask, and changes the film thickness even though the transferability can be improved. It is an object of the present invention to provide a screen printing method and apparatus capable of performing high quality printing.

【0008】[0008]

【課題を解決するための手段】本発明のスクリーン印刷
方法は上記目的を達成するため、スクリーンマスクの下
面に被印刷物の上面を対向させ、スクリーンマスク上面
でスキージを移動させることによって、スクリーンマス
クに設けられた開口部に印刷材料を充填した後、スクリ
ーンマスクから被印刷物を離すことによって印刷材料を
被印刷物上へ転写させるスクリーン印刷方法において、
スクリーンマスクの下面に凹部を設けると共に、この凹
部に対向する被印刷物の上面に、凹部と合わさるように
凸部を設け、この凸部には凹部に設けられた開口部に充
填された印刷材料を転写することを特徴とする。
In order to achieve the above object, a screen printing method according to the present invention provides a screen mask by moving a squeegee on the upper surface of the screen mask with the upper surface of the printing object facing the lower surface of the screen mask. After filling the printing material in the provided opening, in a screen printing method of transferring the printing material onto the printing material by separating the printing material from the screen mask,
A concave portion is provided on the lower surface of the screen mask, and a convex portion is provided on the upper surface of the printing material opposed to the concave portion so as to match the concave portion, and the convex portion is provided with a printing material filled in an opening provided in the concave portion. It is characterized by transferring.

【0009】上記発明によれば、スクリーンマスクの下
面に設けられた凹部と被印刷物の上面に設けられた凸部
とが合わさって、その他の凹凸形状になっていない部分
も問題なく対向し、スキージはフラットなスクリーンマ
スク上面を従来のような引っ掛かりや印刷材料の掻き残
しなくスムースに移動することができる。すると、スク
リーンマスクに設けられた開口部に印刷材料が充填さ
れ、その後に被印刷物をスクリーンマスクから離すと、
前記凹凸の合わさる部分では凹部を形成した分だけ膜厚
の薄い印刷材料が転写され、全体として異なる膜厚の印
刷材料が転写された被印刷物を得ることができる。その
際、前記凹部には少ない印刷材料を供給するために開口
面積の小さい開口部を設けた場合であっても、前述した
アスペクト比を低い状態に保つように、開口面積に対応
して局部的に膜厚を薄くできるので、開口部の側面から
の抵抗が少なく転写性が良くなり、全体にわたって高品
質な印刷が可能になる。その上、印刷材料の掻き残しの
問題が生じないので、開口密度の高い印刷も可能にな
る。
According to the above-mentioned invention, the concave portion provided on the lower surface of the screen mask and the convex portion provided on the upper surface of the printing material are combined so that other non-concavo-convex portions are also opposed without any problem. Can smoothly move the upper surface of the flat screen mask without catching or leaving the printing material unremoved as in the related art. Then, the printing material is filled into the opening provided in the screen mask, and then, when the printing medium is separated from the screen mask,
A printing material having a thin film thickness is transferred to the portion where the concave and convex portions are formed by an amount corresponding to the formation of the concave portion, and a printed material to which a printing material having a different film thickness is transferred as a whole can be obtained. At this time, even when the concave portion is provided with an opening having a small opening area in order to supply a small amount of printing material, the concave portion has a local area corresponding to the opening area so as to keep the above-described aspect ratio low. Since the film thickness can be reduced, the resistance from the side surface of the opening is small and the transferability is improved, so that high-quality printing can be performed throughout. In addition, since there is no problem of unscratched printing material, printing with a high aperture density can be performed.

【0010】上記発明において、スクリーンマスクの下
面に設けられる凹部をその深さが複数段となるように形
成し、この凹部に対向して被印刷物の上面に設けられる
凸部を、凹部の複数段形状と合わさるように複数段に形
成すると好適である。この構成によれば、開口面積にそ
れぞれ対応してアスペクト比を低く保つように複数段に
形成することによって、印刷材料を被印刷物に良好に転
写することができる。
In the above invention, the concave portion provided on the lower surface of the screen mask is formed so as to have a plurality of steps, and the convex portion provided on the upper surface of the printing object facing the concave portion is formed by a plurality of steps of the concave portion. It is preferable to form a plurality of stages so as to match the shape. According to this configuration, the printing material can be satisfactorily transferred to the printing substrate by forming the printing material in a plurality of stages so as to keep the aspect ratio low corresponding to the opening area.

【0011】上記発明において、被印刷物の上面に設け
られる凸部に、スクリーンマスクの開口部にそれぞれ対
向する凹孔を複数個設けると好適である。この構成によ
れば、印刷材料は開口部だけでなく凹孔にも充填される
ので、開口部の側面からの抵抗を少なくしつつ印刷材料
を多く供給することができ、接合強度を増すことができ
る。
In the above invention, it is preferable that a plurality of concave holes are provided in the convex portion provided on the upper surface of the printing material, each concave hole facing the opening of the screen mask. According to this configuration, the printing material is filled not only in the opening but also in the recess, so that a large amount of printing material can be supplied while reducing the resistance from the side surface of the opening, and the joining strength can be increased. it can.

【0012】上記発明において、スクリーンマスクと被
印刷物にそれぞれ基準マークを設け、それら基準マーク
を認識手段によって認識することによって、被印刷物の
凹部とスクリーンマスクの凸部とを位置合わせすること
によれば、凹部と凸部の凹凸形状を正確に合わせること
ができる。
In the above invention, the reference mark is provided on each of the screen mask and the printing material, and the reference mark is recognized by the recognition means, so that the concave portion of the printing material and the projection of the screen mask are aligned. The concave and convex shapes of the concave and convex portions can be accurately matched.

【0013】本発明のスクリーン印刷装置は上記目的を
達成するため、スクリーンマスクの下面に被印刷物の上
面を対向させ、スクリーンマスク上面でスキージを移動
させることによって、スクリーンマスクに設けられた開
口部に印刷材料を充填した後、スクリーンマスクから被
印刷物を離すことによって印刷材料を被印刷物上へ転写
させるスクリーン印刷装置において、開口面積の異なる
開口部が多数設けられたスクリーンマスクの下面に、開
口面積の小さい開口部の周囲の厚みを小とするための凹
部を設けたことを特徴とする上記発明によれば、上記ス
クリーン印刷方法を具体的に実現することができる。
In order to achieve the above object, the screen printing apparatus of the present invention has an upper surface of a printing object opposed to a lower surface of a screen mask, and a squeegee is moved on the upper surface of the screen mask, so that an opening provided in the screen mask is formed. After filling the printing material, in a screen printing apparatus that transfers the printing material onto the printing material by separating the printing material from the screen mask, the lower surface of the screen mask provided with a large number of openings having different opening areas has an opening area of According to the invention described above, in which a concave portion for reducing the thickness around the small opening is provided, the screen printing method can be specifically realized.

【0014】上記スクリーン印刷方法及びスクリーン印
刷装置に用いるスクリーンマスクを、開口面積の異なる
開口部が多数設けられたものを採用し、その下面に開口
面積の小さい開口部の周囲の厚みを小とするための凹部
を設けると好適であり、また、その凹部を深さが複数段
となるように形成し、開口部の周囲の厚みを開口面積の
大きさにそれぞれ対応した厚みになるようにしたり、開
口部について側面積/底面積の関係式で表されるアスペ
クト比が、全体にわたって2以下になるように凹部の深
さを設定するとより好適である。
As the screen mask used in the screen printing method and the screen printing apparatus, a screen mask provided with a large number of openings having different opening areas is employed, and the thickness around the opening having a small opening area is reduced on the lower surface. It is preferable to provide a concave portion for the, and also, the concave portion is formed so as to have a plurality of depths, and the thickness around the opening portion may be a thickness corresponding to the size of the opening area, It is more preferable to set the depth of the concave portion so that the aspect ratio of the opening portion expressed by the relational expression of the side area / bottom area becomes 2 or less throughout.

【0015】[0015]

【発明の実施の形態】以下本発明の一実施形態を、図1
〜図6を参照しながら説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

【0016】図1はスクリーンマスク1と被印刷物2を
対向させて、印刷材料3をスキージ4を用いて被印刷物
2上に印刷している状態を示している。スクリーンマス
ク1には開口面積の異なる開口部1cが多数設けられ、
後述するようにスキージ4がスクリーンマスク1の上面
1aを移動して印刷材料3を開口部1cに充填する。第
1実施形態では、スクリーンマスク1の下面1bに凹部
5を設けると共に、凹部5に対向する被印刷物2の上面
2aに、凹部5と合わさるように凸部6を設けている。
FIG. 1 shows a state in which a printing material 3 is printed on a printing material 2 using a squeegee 4 with the screen mask 1 and the printing material 2 facing each other. The screen mask 1 is provided with a large number of openings 1c having different opening areas.
As described later, the squeegee 4 moves on the upper surface 1a of the screen mask 1 to fill the opening 1c with the printing material 3. In the first embodiment, the concave portion 5 is provided on the lower surface 1 b of the screen mask 1, and the convex portion 6 is provided on the upper surface 2 a of the printing medium 2 facing the concave portion 5 so as to match the concave portion 5.

【0017】第1実施形態の印刷工程を図2を参照して
順に説明する。まず、(a)で示すように、スクリーン
マスク1の下面1bに回路基板等の被印刷物2の上面2
aを対向させる。この際、スクリーンマスク1の凹部5
と被印刷物2の凸部6がちょうど合わさるため、その他
の凹凸形状になっていない部分も問題なく対向させるこ
とができる。そしてスクリーンマスク1の上面1aに印
刷材料3を供給した後、スキージ4を矢印Aで示すよう
にスクリーンマスク1の上面1aで水平方向に移動させ
る。この際、前記のように凹部5と凸部6が合わさり、
スキージ4の通過するスクリーンマスク1の上面1aは
面一になっているのでスキージングを問題なく行うこと
ができる。尚、スクリーンマスク1と被印刷物2は接触
しているのが好適であるが、接触していない場合は、印
刷時にスキージ4がスクリーンマスク1を圧力をかけな
がら移動することによって接触させるようにする。スキ
ージ4等の圧力発生手段は、エアーで直接圧力をかけた
りシリンダー等のアクチュエータにより圧力をかけても
良い。
The printing process of the first embodiment will be described in order with reference to FIG. First, as shown in (a), an upper surface 2 of a printing substrate 2 such as a circuit board is placed on a lower surface 1b of a screen mask 1.
a. At this time, the recess 5 of the screen mask 1
And the convex portion 6 of the print substrate 2 just match, so that other portions having no uneven shape can be opposed to each other without any problem. After the printing material 3 is supplied to the upper surface 1a of the screen mask 1, the squeegee 4 is moved in the horizontal direction on the upper surface 1a of the screen mask 1 as shown by an arrow A. At this time, the concave portion 5 and the convex portion 6 are combined as described above,
Since the upper surface 1a of the screen mask 1 through which the squeegee 4 passes is flush, squeezing can be performed without any problem. It is preferable that the screen mask 1 and the printing medium 2 are in contact with each other, but if not, the squeegee 4 moves the screen mask 1 while applying pressure during printing so as to make contact. . The pressure generating means such as the squeegee 4 may apply pressure directly with air or apply pressure with an actuator such as a cylinder.

【0018】このスキージ4の移動により、印刷材料3
は(b)で示すように、スクリーンマスク1に設けられ
た開口部1cに充填される。
The movement of the squeegee 4 causes the printing material 3
Is filled in an opening 1c provided in the screen mask 1 as shown in FIG.

【0019】次に(c)で示すように、被印刷物2をス
クリーンマスク1から離すことによって、凹部5に合わ
さるように形成された凸部6の上面では薄い膜厚tの印
刷材料3が転写される一方、凸部6の形成されていない
被印刷物2の上面2aでは厚い膜厚t’の印刷材料3が
転写され、全体として異なる膜厚(tとt’)の印刷材
料3が転写された被印刷物2が得られる。その際、凹部
5には少ない印刷材料3を供給するために開口面積の小
さい開口部1cを設けた場合であっても、前述したアス
ペクト比(側面積/開口面積)を低い状態に保つように
開口部1cの周囲の厚みtを小にして印刷材料3の膜厚
tを薄くできるので、開口部1cの側面からの抵抗が少
なく転写性が良くなり、全体にわたって高品質な印刷が
可能になる。その上、スクリーンマスク1の上面1aは
フラットであるので、スキージ4はスムースに移動し、
従来のような印刷材料3の掻き残しの問題が生じないの
で、開口密度の高い印刷も可能になる。
Next, as shown in (c), the printing material 3 having a thin film thickness t is transferred onto the upper surface of the convex portion 6 formed so as to match the concave portion 5 by separating the printing material 2 from the screen mask 1. On the other hand, the printing material 3 having a large thickness t 'is transferred to the upper surface 2a of the printing material 2 where the projections 6 are not formed, and the printing materials 3 having different thicknesses (t and t') are transferred as a whole. The printing substrate 2 is obtained. At this time, even if the concave portion 5 is provided with the opening 1c having a small opening area in order to supply a small amount of the printing material 3, the above-described aspect ratio (side area / opening area) is kept low. Since the thickness t of the printing material 3 can be reduced by reducing the thickness t around the opening 1c, the resistance from the side surface of the opening 1c is small, the transferability is improved, and high-quality printing can be performed as a whole. . In addition, since the upper surface 1a of the screen mask 1 is flat, the squeegee 4 moves smoothly,
Since the problem of unscratching of the printing material 3 as in the related art does not occur, printing with a high aperture density can be performed.

【0020】このような効果はスクリーンマスク1の厚
みにもよるが、特に開口幅0.3mm以下の場合に特に
効果を発揮し、アスペクト比によると2以下、好ましく
は1.7以下になると効果を発揮する。これは、近年の
印刷パターンの高密度化の中で開口幅の微細化の傾向に
あるスクリーン印刷において十分効果を発揮し、被印刷
物2の小型化・高精細化等を実現することができる。
Although such an effect depends on the thickness of the screen mask 1, it is particularly effective when the opening width is 0.3 mm or less. When the aspect ratio is 2 or less, preferably 1.7 or less. Demonstrate. This sufficiently exerts an effect in screen printing in which the opening width tends to be finer in recent years with a higher density of print patterns, and it is possible to realize a reduction in size and definition of the print substrate 2.

【0021】次に、本発明の第2実施形態について図3
を参照して説明する。
Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

【0022】この第2実施形態は、スクリーンマスク1
の下面1bに設けられる凹部15をその深さが段状とな
るように形成し、この凹部15に対向して被印刷物2の
上面2aに設けられる凸部16を、凹部15の段形状と
合わさるような凸形状に形成している。本実施形態で
は、凹部15を2段にしているが、複数段に形成するこ
ともできる。印刷材料3の膜厚は図3の右側から順に薄
くなっていき、大膜厚部3aに比べて中膜厚部3bが、
中膜厚部3bに比べて小膜厚部3cが薄くなっている。
このように、開口部1cの開口面積に応じてそれぞれの
部分のアスペクト比を低い状態に保つために、被印刷物
2の上面2aとスクリーンマスク1の下面1bの対向す
る凹凸形状を複数段にすることによって、複数種の膜厚
の印刷を、一括して転写性良く行うことができる。
In the second embodiment, the screen mask 1
The concave portion 15 provided on the lower surface 1b of the substrate 2 is formed so that the depth thereof is stepped, and the convex portion 16 provided on the upper surface 2a of the printing medium 2 facing the concave portion 15 matches the step shape of the concave portion 15. It is formed in such a convex shape. In the present embodiment, the recess 15 is formed in two steps, but may be formed in a plurality of steps. The thickness of the printing material 3 becomes thinner in order from the right side of FIG.
The small thickness portion 3c is thinner than the middle thickness portion 3b.
As described above, in order to keep the aspect ratio of each portion low according to the opening area of the opening 1c, the concavo-convex shape of the upper surface 2a of the printing substrate 2 and the lower surface 1b of the screen mask 1 are formed in a plurality of steps. Thereby, printing of a plurality of film thicknesses can be collectively performed with good transferability.

【0023】また図4に示す第3実施形態のように、ス
キージの材質や印刷条件等によりスクリーンマスク1の
上面1aに段差があっても問題のない場合には、第1実
施形態と同じく被印刷物2に段状でない凸部6を設け、
この凸部6が位置するスクリーンマスク1上の一部に凹
部7を設け、その凹部7の位置する開口部1cに充填さ
れた印刷材料3を転写することによって、第2実施形態
と同様に小膜厚部3cを形成することができ、その他の
部分も同様に開口部1cの開口面積に応じて側面積を小
さくできるように、中膜厚部3b、大膜厚部3aを形成
することができる。
As in the third embodiment shown in FIG. 4, when there is no problem even if there is a step on the upper surface 1a of the screen mask 1 due to the material of the squeegee, printing conditions, etc. Providing a non-stepped convex portion 6 on the printed material 2,
A concave portion 7 is provided in a part of the screen mask 1 where the convex portion 6 is located, and the printing material 3 filled in the opening 1c where the concave portion 7 is located is transferred. The middle-thickness portion 3b and the large-thickness portion 3a can be formed so that the film thickness portion 3c can be formed, and the other portions can be similarly reduced in side area according to the opening area of the opening portion 1c. it can.

【0024】尚、図示はしないが、被印刷物が回路基板
等の場合、回路基板を製作する際、全体の配線パターン
を回路基板に形成した後、回路基板の凸部6、16に微
細な配線パターンを追加して形成することにより、部分
的な追加処理が可能になり、製作コストの削減を実現し
つつ微細配線パターンを形成することが可能になる。
Although not shown, when the printed substrate is a circuit board or the like, when the circuit board is manufactured, after forming the entire wiring pattern on the circuit board, fine wiring is formed on the projections 6 and 16 of the circuit board. By forming an additional pattern, a partial additional process can be performed, and a fine wiring pattern can be formed while reducing manufacturing costs.

【0025】また図5(a)に示す第4実施形態は、ス
クリーンマスク1の凹部5に対向する被印刷物2の凸部
6に、開口部1cに対向する凹孔6aを設け、開口部1
cに充填される印刷材料3が凹孔6aにも充填されるよ
うにしている。従って、開口部1cの側面からの抵抗を
少なくしつつ印刷材料3を多く供給することができ、接
合強度を増すことができる。
In the fourth embodiment shown in FIG. 5A, a concave portion 6a facing the opening 1c is provided in the convex portion 6 of the printing material 2 facing the concave portion 5 of the screen mask 1.
The printing material 3 filled in c is also filled in the concave hole 6a. Therefore, a large amount of the printing material 3 can be supplied while reducing the resistance from the side surface of the opening 1c, and the bonding strength can be increased.

【0026】また図5(b)に示す第5実施形態は、被
印刷物を回路基板2Aとし、この回路基板2Aに、スク
リーンマスク1の凹部5に対向する凸部6を積層形成し
ている。そして積層形成した凸部6の上面にランド11
を形成し配線処理をしている。
In the fifth embodiment shown in FIG. 5B, a printed substrate is a circuit board 2A, and a convex portion 6 facing the concave portion 5 of the screen mask 1 is formed on the circuit board 2A. A land 11 is formed on the upper surface of the convex portion 6 formed by lamination.
Is formed and wiring processing is performed.

【0027】また図5(c)に示す第6実施形態は、被
印刷物を回路基板2Aとし、この回路基板2Aの凸部6
として、穴あきフィルム12をあらかじめ貼付けること
によって形成している。この穴あきフィルム12の穴1
2aは、回路基板2Aのランド11にそれぞれ対向する
と共に、スクリーンマスク1の開口部1cにもそれぞれ
対向しており、印刷材料3は開口部1cと穴12aに充
填される。従って、この実施形態では、図5(a)で示
した第4実施形態と同様に、スクリーンマスク1の開口
部1cの側面からの抵抗を少なくしつつ印刷材料3を多
く供給することができる。また、凸部6に再度配線処理
を行わなくても良いため、コスト的にも有効である。
In the sixth embodiment shown in FIG. 5 (c), the substrate to be printed is a circuit board 2A, and the convex portions 6 of the circuit board 2A are provided.
Is formed by pasting the perforated film 12 in advance. Hole 1 of this perforated film 12
2a faces the lands 11 of the circuit board 2A and also faces the openings 1c of the screen mask 1, respectively, and the printing material 3 is filled in the openings 1c and the holes 12a. Therefore, in this embodiment, as in the fourth embodiment shown in FIG. 5A, a large amount of the printing material 3 can be supplied while reducing the resistance from the side surface of the opening 1c of the screen mask 1. Further, it is not necessary to perform the wiring process again on the protruding portion 6, which is effective in terms of cost.

【0028】図6は本実施形態において、スクリーンマ
スク1と被印刷物2を位置合わせする状態を示す(第1
実施形態のスクリーンマスク1と被印刷物2を用いて説
明する)。
FIG. 6 shows a state in which the screen mask 1 and the printing medium 2 are aligned in this embodiment (first embodiment).
This will be described using the screen mask 1 and the printing medium 2 of the embodiment.

【0029】(a)において、スクリーンマスク1の対
角線方向に基準マーク8a、8bが設けられている。そ
れぞれの基準マーク8a、8bを図示しない認識手段に
より認識して中心9aを算出し、XYθ方向において位
置ずれを補正する。(b)においても同様に、被印刷物
2の対角線方向に設けられた基準マーク10a、10b
を認識して中心9bを算出し、XYθ方向において位置
ずれを補正する。スクリーンマスク1の中心9aからの
凹部5の位置と、被印刷物2の中心9bからの凸部6の
位置は同一であるので、各基準マーク8a、8b、10
a、10bを認識することによって凹部5と凸部6を位
置合わせすることができる。この位置合わせによって、
凹部5と凸部6の凹凸形状を正確に合わせることができ
る。
3A, reference marks 8a and 8b are provided in a diagonal direction of the screen mask 1. FIG. The center 9a is calculated by recognizing each of the reference marks 8a and 8b by a not-shown recognizing means, and the displacement is corrected in the XYθ directions. Similarly, in (b), the reference marks 10a and 10b provided in the diagonal direction of the print
, The center 9b is calculated, and the displacement is corrected in the XYθ directions. Since the position of the concave portion 5 from the center 9a of the screen mask 1 and the position of the convex portion 6 from the center 9b of the printing substrate 2 are the same, each of the reference marks 8a, 8b, 10
By recognizing a and 10b, the concave portion 5 and the convex portion 6 can be aligned. With this alignment,
The concave and convex shapes of the concave portion 5 and the convex portion 6 can be accurately matched.

【0030】[0030]

【発明の効果】以上のように本発明によれば、スクリー
ンマスクの凹部と被印刷物の凸部とを対向させ、印刷材
料を被印刷物に転写することにより、凹凸の合わさる部
分では主に膜厚の薄い印刷材料を開口部側面から抵抗な
く印刷することができ、全体にわたってアスペクト比を
低くして、転写性を向上させることができるにもかかわ
らず、印刷材料の掻き残しを無くすと共に、スクリーン
マスクの開口部の開口密度の高い印刷や膜厚の異なった
印刷を高品質に行うことができる。
As described above, according to the present invention, the concave portion of the screen mask and the convex portion of the printing material are opposed to each other, and the printing material is transferred to the printing material. The thin printing material can be printed from the side of the opening without resistance, and the aspect ratio can be reduced throughout to improve the transferability. It is possible to perform high-quality printing with a high opening density of the openings and printing with different film thicknesses.

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

【図1】本発明の第1実施形態における印刷状態を示す
断面図。
FIG. 1 is a sectional view showing a printing state according to a first embodiment of the present invention.

【図2】同実施形態の印刷工程を順に示す断面図。FIG. 2 is an exemplary sectional view showing a printing step of the embodiment in order;

【図3】本発明の第2実施形態を示す断面図。FIG. 3 is a sectional view showing a second embodiment of the present invention.

【図4】本発明の第3実施形態を示す断面図。FIG. 4 is a sectional view showing a third embodiment of the present invention.

【図5】(a)は本発明の第4実施形態を示す断面図、
(b)は本発明の第5実施形態を示す断面図、(c)は
本発明の第6実施形態を示す断面図。
FIG. 5A is a sectional view showing a fourth embodiment of the present invention,
(B) is sectional drawing which shows 5th Embodiment of this invention, (c) is sectional drawing which shows 6th Embodiment of this invention.

【図6】本発明の実施形態において、スクリーンマスク
と被印刷物を位置合わせしている状態を示す平面図。
FIG. 6 is a plan view showing a state in which a screen mask and a printing medium are aligned in the embodiment of the present invention.

【図7】従来例の印刷状態を示す断面図。FIG. 7 is a sectional view showing a printing state of a conventional example.

【図8】従来例のスクリーンマスクと被印刷物との接触
状態を示し、(a)はスクリーンマスクに凹部を設けな
い従来例を示す断面図、(b)はスクリーンマスクに凹
部を設けた従来例を示す断面図。
8A and 8B are cross-sectional views showing a conventional example in which a concave portion is not provided in a screen mask, and FIG. 8B is a cross-sectional view showing a conventional example in which a concave portion is not provided in a screen mask; FIG.

【図9】従来例におけるスクリーンマスクの開口部の側
面積と底面積との関係を示す概念図。
FIG. 9 is a conceptual diagram showing a relationship between a side area and a bottom area of an opening of a screen mask in a conventional example.

【符号の説明】[Explanation of symbols]

1 スクリーンマスク 1a スクリーンマスクの上面 1b スクリーンマスクの下面 1c 開口部 2 被印刷物 2A 回路基板(被印刷物) 2a 被印刷物の上面 3 印刷材料 4 スキージ 5 スクリーンマスクの凹部 6 被印刷物の凸部 6a 凸部の凹孔 8a、8b、10a、10b 基準マーク 9a スクリーンマスクの中心 9b 被印刷物の中心 12 穴あきフィルム(回路基板の凸部) 15 複数段に形成された凹部 16 複数段に形成された凸部 DESCRIPTION OF SYMBOLS 1 Screen mask 1a Upper surface of a screen mask 1b Lower surface of a screen mask 1c Opening 2 Printed object 2A Circuit board (substrate) 2a Upper surface of a printed object 3 Printing material 4 Squeegee 5 Concave part of a screen mask 6 Convex part of a print object 6a Convex part 8a, 8b, 10a, 10b Reference mark 9a Center of screen mask 9b Center of printed material 12 Perforated film (convex portion of circuit board) 15 Concavity formed in multiple stages 16 Projection formed in multiple stages

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) H05K 3/12 610 H05K 3/12 610P 3/34 505 3/34 505C (72)発明者 三村 敏則 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Fターム(参考) 2C035 AA01 AA06 FA27 FB23 FB32 FD07 2H113 AA01 AA02 AA03 BA10 BB21 BB22 BB31 BB32 CA17 FA04 FA55 2H114 AB15 AB17 DA73 EA04 GA31 5E319 AC01 BB05 CD29 5E343 AA02 DD03 FF13 GG08 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H05K 3/12 610 H05K 3/12 610P 3/34 505 3/34 505C (72) Inventor Toshinori Mimura Osaka Prefecture 1006 Kadoma Kadoma Matsushita Electric Industrial Co., Ltd.F-term (reference) GG08

Claims (11)

【特許請求の範囲】[Claims] 【請求項1】 スクリーンマスクの下面に被印刷物の上
面を対向させ、スクリーンマスク上面でスキージを移動
させることによって、スクリーンマスクに設けられた開
口部に印刷材料を充填した後、スクリーンマスクから被
印刷物を離すことによって印刷材料を被印刷物上へ転写
させるスクリーン印刷方法において、 スクリーンマスクの下面に凹部を設けると共に、この凹
部に対向する被印刷物の上面に、凹部と合わさるように
凸部を設け、この凸部には凹部に設けられた開口部に充
填された印刷材料を転写することを特徴とするスクリー
ン印刷方法。
1. A printing material is filled into an opening provided in a screen mask by moving a squeegee on the upper surface of the screen mask with the upper surface of the printing material facing the lower surface of the screen mask. In a screen printing method for transferring a printing material onto a printing material by separating the printing material, a concave portion is provided on the lower surface of the screen mask, and a convex portion is provided on the upper surface of the printing material facing the concave portion so as to match the concave portion. A screen printing method, comprising transferring a printing material filled in an opening provided in a concave portion to a convex portion.
【請求項2】 スクリーンマスクの下面に設けられる凹
部をその深さが複数段となるように形成し、この凹部に
対向して被印刷物の上面に設けられる凸部を、凹部の複
数段形状と合わさるように複数段に形成した請求項1記
載のスクリーン印刷方法。
2. A concave portion provided on the lower surface of the screen mask is formed so as to have a plurality of depths, and a convex portion provided on the upper surface of the printing object facing the concave portion has a multi-step shape of the concave portion. 2. The screen printing method according to claim 1, wherein the screen printing is performed in a plurality of stages so as to be combined.
【請求項3】 被印刷物の上面に設けられる凸部に、ス
クリーンマスクの開口部にそれぞれ対向する凹孔を複数
個設けた請求項1または2記載のスクリーン印刷方法。
3. The screen printing method according to claim 1, wherein a plurality of concave holes are provided in the convex portion provided on the upper surface of the printing material, each of the concave portions facing the opening of the screen mask.
【請求項4】 スクリーンマスクと被印刷物にそれぞれ
基準マークを設け、それら基準マークを認識手段によっ
て認識することによって、被印刷物の凹部とスクリーン
マスクの凸部とを位置合わせする請求項1、2または3
記載のスクリーン印刷方法。
4. A reference mark is provided on each of a screen mask and a printing material, and the reference mark is recognized by a recognition unit, so that a concave portion of the printing material and a projection of the screen mask are aligned. 3
Screen printing method as described.
【請求項5】 スクリーンマスクの下面に被印刷物の上
面を対向させ、スクリーンマスク上面でスキージを移動
させることによって、スクリーンマスクに設けられた開
口部に印刷材料を充填した後、スクリーンマスクから被
印刷物を離すことによって印刷材料を被印刷物上へ転写
させるスクリーン印刷装置において、 開口面積の異なる開口部が多数設けられたスクリーンマ
スクの下面に、開口面積の小さい開口部の周囲の厚みを
小とするための凹部を設けたことを特徴とするスクリー
ン印刷装置。
5. A printing material is filled in an opening provided in the screen mask by moving a squeegee on the upper surface of the screen mask with the upper surface of the printing material facing the lower surface of the screen mask. In a screen printing apparatus that transfers a printing material onto a printing substrate by releasing the screen mask, the thickness of the periphery of the opening having a small opening area is reduced on the lower surface of a screen mask provided with a large number of openings having different opening areas. A screen printing apparatus characterized by having a concave portion.
【請求項6】 開口面積の異なる開口部を多数設け、そ
れぞれの開口部に充填された印刷材料を、対向する被印
刷物上へ転写させてスクリーン印刷を行うために用いる
スクリーンマスクにおいて、その下面に開口面積の小さ
い開口部の周囲の厚みを小とするための凹部が設けられ
たスクリーンマスク。
6. A screen mask used for performing screen printing by providing a large number of openings having different opening areas and transferring a printing material filled in each of the openings onto an opposed printing material. A screen mask provided with a concave portion for reducing the thickness around an opening having a small opening area.
【請求項7】 下面に設けられる凹部をその深さが複数
段となるように形成し、開口部の周囲の厚みを開口面積
の大きさにそれぞれ対応した厚みになるように設定した
請求項6記載のスクリーンマスク。
7. The concave portion provided on the lower surface is formed so as to have a plurality of steps, and the thickness around the opening is set to a thickness corresponding to the size of the opening area. The described screen mask.
【請求項8】 開口部について側面積/底面積の関係式
で表されるアスペクト比が、全体にわたって2以下にな
るように凹部の深さを設定した請求項6または7記載の
スクリーンマスク。
8. The screen mask according to claim 6, wherein the depth of the recess is set such that the aspect ratio of the opening expressed by the relational expression of side area / bottom area is 2 or less throughout.
【請求項9】 請求項6から8のいずれかに記載のスク
リーンマスクを用いて印刷材料が印刷される被印刷物が
回路基板であり、この回路基板はスクリーンマスクの下
面に設けられる凹部に対向する上面に、凹部と合わさる
ように凸部が設けられていることを特徴とする回路基
板。
9. A printed substrate on which a printing material is printed using the screen mask according to claim 6 is a circuit board, and the circuit board faces a recess provided on a lower surface of the screen mask. A circuit board, wherein a convex portion is provided on an upper surface so as to match a concave portion.
【請求項10】 回路基板の上面に設けられる凸部は、
積層形成されている請求項9記載の回路基板。
10. The projection provided on the upper surface of the circuit board,
The circuit board according to claim 9, wherein the circuit board is formed by lamination.
【請求項11】 回路基板の上面に設けられる凸部は、
スクリーンマスクの開口部にそれぞれ対向する穴を有す
る穴あきフィルムを貼付けることによって形成されてい
る請求項9記載の回路基板。
11. The projection provided on the upper surface of the circuit board,
The circuit board according to claim 9, wherein the circuit board is formed by sticking a perforated film having holes facing each other to the opening of the screen mask.
JP31687499A 1999-11-08 1999-11-08 Method and device for screen printing, screen mask used in the method and device and circuit substrate thereof Pending JP2001130160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31687499A JP2001130160A (en) 1999-11-08 1999-11-08 Method and device for screen printing, screen mask used in the method and device and circuit substrate thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31687499A JP2001130160A (en) 1999-11-08 1999-11-08 Method and device for screen printing, screen mask used in the method and device and circuit substrate thereof

Publications (1)

Publication Number Publication Date
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Country Link
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