JPH0640040A - Nozzle plate for ink-jet printing head - Google Patents
Nozzle plate for ink-jet printing headInfo
- Publication number
- JPH0640040A JPH0640040A JP21745992A JP21745992A JPH0640040A JP H0640040 A JPH0640040 A JP H0640040A JP 21745992 A JP21745992 A JP 21745992A JP 21745992 A JP21745992 A JP 21745992A JP H0640040 A JPH0640040 A JP H0640040A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle hole
- ink
- nozzle
- nozzle plate
- water repellency
- 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
Links
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Nozzles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インクジェット記録装
置のインクジェットプリントヘッド用ノズル板に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle plate for an ink jet print head of an ink jet recording apparatus.
【０００２】[0002]
【従来の技術】一般に、オンデマンド型インクジェット
記録装置のインクジェットプリントヘッドにおいて、イ
ンクジェットプリントヘッドを樹脂成形により作成した
場合、樹脂によってはその表面がある程度撥水性をもつ
場合がある。この場合、樹脂製ノズル孔内のメニスカス
は移動し易くなり、インクジェットプリントヘッド内の
急激な圧力変動時にメニスカスが引き込まれてしまう。
図４は、この様な状態を示したもので、１はインクジェ
ットプリントヘッド、２はノズル孔、３はインクで、メ
ニスカス４がインクジェットプリントヘッド内（図の矢
印方向）へ引き込まれている。この様な状態が生ずる
と、気泡がノズルから混入し、インク噴射に悪影響を及
ぼしてしまう。そこで、この問題を解決するため、樹脂
製ノズル孔内の親水処理が必要となる。図５は、ノズル
孔内壁に親水処理を施した場合を示し（図の×印）、ノ
ズル孔内のメニスカス４は、ノズル先端で固定され、圧
力変動時もインクジェットプリントヘッド内に引き込ま
れなくなる。一方、樹脂製ノズル孔面は、充分な撥水性
がないと、インク噴射時にインクだれを生じ、噴射安定
性、方向性が悪くなる。そこで、樹脂成形したインクジ
ェットプリントヘッド樹脂表面の撥水性がそれ程ない場
合、ノズル孔面の撥水処理が必要となる。2. Description of the Related Art Generally, in an ink jet print head of an on-demand type ink jet recording apparatus, when the ink jet print head is formed by resin molding, the surface of the ink may have some water repellency depending on the resin. In this case, the meniscus in the resin nozzle hole is likely to move, and the meniscus is drawn in when a rapid pressure change occurs in the inkjet print head.
FIG. 4 shows such a state, where 1 is an inkjet print head, 2 is a nozzle hole, 3 is ink, and the meniscus 4 is drawn into the inkjet print head (in the direction of the arrow in the figure). When such a state occurs, air bubbles are mixed in from the nozzle, which adversely affects ink ejection. Therefore, in order to solve this problem, hydrophilic treatment inside the resin nozzle hole is required. FIG. 5 shows a case where hydrophilic treatment is applied to the inner wall of the nozzle hole (marked by X in the figure), and the meniscus 4 in the nozzle hole is fixed at the tip of the nozzle and is not drawn into the ink jet print head even when the pressure fluctuates. On the other hand, if the resin nozzle hole surface does not have sufficient water repellency, ink dripping occurs at the time of ink ejection, and ejection stability and directionality deteriorate. Therefore, when the resin-molded ink jet print head resin surface is not so water-repellent, the nozzle hole surface needs to be water-repellent.
【０００３】そこで、特開昭６１−１４１５６号公報記
載の方法では、ノズル孔内壁は親水性を、ノズル孔面は
撥水性をそれぞれ有し、インクだれや、気泡混入のない
インクジェットプリントヘッドの表面処理方法を提供し
ている。Therefore, in the method described in Japanese Patent Laid-Open No. 61-14156, the inner surface of the nozzle hole has hydrophilicity and the nozzle hole surface has water repellency, and the surface of the ink jet print head is free from ink dripping and air bubble inclusion. It provides a processing method.
【０００４】図６〜図８に基づいて従来例を説明する。
先ず、樹脂インクジェットプリントヘッド１を酸処理す
るが、この酸処理としては、例えば、重クロム酸混液の
標準液（７０℃）中に５〜１５分浸漬した後、水洗を行
う。この場合、図６に示す如く、ノズル孔内壁５及びノ
ズル孔辺面６が親水処理される（図の×印）。この親水
処理された面は、粗面であり、且つカルボニル基のよう
な極性基で被われた面となる。A conventional example will be described with reference to FIGS.
First, the resin inkjet print head 1 is subjected to an acid treatment. As the acid treatment, for example, the resin ink jet print head 1 is immersed in a standard solution (70 ° C.) of a dichromic acid mixed solution for 5 to 15 minutes and then washed with water. In this case, as shown in FIG. 6, the inner wall 5 of the nozzle hole and the side surface 6 of the nozzle hole are hydrophilically treated (marked by X in the figure). This hydrophilically treated surface is rough and covered with a polar group such as a carbonyl group.
【０００５】次に、この親水処理をしたノズル孔辺面に
撥水被膜７を施す。図７及び図８は、ノズル孔辺面への
撥水剤被膜を塗布法により行う場合を示し、図７は、ノ
ズル内部よりガス８を発生させ、撥水皮膜７をスプレー
コート９により矢印の様に塗布を行い、ノズル孔２への
侵入を防ぐようにしている。図８は、ノズル孔をマスク
１０にてマスクし、ノズル孔２への侵入を防ぐようにし
ている。Next, a water repellent coating 7 is applied to the side surface of the nozzle hole which has been subjected to the hydrophilic treatment. 7 and 8 show the case where the water repellent coating is applied to the side surface of the nozzle hole by a coating method. In FIG. 7, gas 8 is generated from the inside of the nozzle, and the water repellent coating 7 is spray-coated 9 to form an arrow mark. The coating is applied in the same manner to prevent the nozzle hole 2 from entering. In FIG. 8, the nozzle holes are masked with a mask 10 to prevent the nozzle holes 2 from entering.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上述し
た従来の方法では、ノズル板の作成工程が複雑で被膜境
界の管理が難しい。However, in the above-mentioned conventional method, the process of forming the nozzle plate is complicated and it is difficult to control the film boundary.
【０００７】そこで本発明は、安価でインクだれや気泡
混入のない印字品質の優れたインクジェットプリントヘ
ッド用ノズル板を提供するものである。Therefore, the present invention provides a nozzle plate for an ink jet print head which is inexpensive and has excellent printing quality without ink dripping or air bubble inclusion.
【０００８】[0008]
【課題を解決するための手段】本発明は、ノズル孔辺面
側に撥水性の高い金属を用いて、ノズル孔内壁側に親水
性の高い金属を用いて２層に電鋳することで接触角の異
なった境界面をノズル孔端に形成することを特徴とす
る。According to the present invention, a metal having high water repellency is used on the side surface of the nozzle hole, and a metal having high hydrophilicity is used on the inner wall side of the nozzle hole to perform electroforming to form two layers. It is characterized in that boundary surfaces having different corners are formed at the nozzle hole ends.
【０００９】[0009]
【実施例】本発明による一実施例を図面を基に説明す
る。図１は、本発明による製造工程を示す。先ず、フォ
トリソ工程によりパターニングされたレジスト１１を真
鍮基板１２上に施し、そして、撥水性の高い金属層１３
を真鍮基板１２上に電鋳で形成し、さらに親水性の高い
金属層１４を撥水性の高い金属層１３上に電鋳で形成す
る。なお、撥水性の高い金属としては、金、白金、ロジ
ウム、パラジウムなどがあり、親水性の高い金属として
は、チタン、ニッケル、カドミウムなどがあり、基本的
に電鋳によって形成できる金属であればよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a manufacturing process according to the present invention. First, a resist 11 patterned by a photolithography process is applied on a brass substrate 12, and a metal layer 13 having high water repellency is applied.
Is formed on the brass substrate 12 by electroforming, and the highly hydrophilic metal layer 14 is formed on the highly water repellent metal layer 13 by electroforming. The metal having high water repellency includes gold, platinum, rhodium, palladium, and the like, and the metal having high hydrophilicity includes titanium, nickel, cadmium, and the like, as long as the metal can be basically formed by electroforming. Good.
【００１０】図２は、真鍮基板１２を濃硝酸で溶解した
後、レジスト１１に化学エッチング剤を与え超音波洗浄
を行い取りだしたノズル板１５を示している。FIG. 2 shows the nozzle plate 15 obtained by melting the brass substrate 12 with concentrated nitric acid, applying a chemical etching agent to the resist 11 and ultrasonically cleaning the resist 11.
【００１１】図３は、ノズル板１５をインクジェットプ
リントヘッドに接着固定し、インク３をチャンネル内に
充填させた様子を示している。この場合、ノズル孔内壁
と同程度の親水性をチャネル内壁１６に持たせてあるた
め、インク３は、ノズル板１５の親水性の高い金属層１
４と撥水性の高い金属層１３の境界であるノズル孔端ま
で充填され、そこでインクの表面張力によりメニスカス
４が形成され固定する。FIG. 3 shows a state in which the nozzle plate 15 is adhesively fixed to the ink jet print head and the ink 3 is filled in the channels. In this case, since the channel inner wall 16 has the same degree of hydrophilicity as the nozzle hole inner wall, the ink 3 is used in the highly hydrophilic metal layer 1 of the nozzle plate 15.
4 and the metal layer 13 having high water repellency are filled up to the end of the nozzle hole, where the meniscus 4 is formed and fixed by the surface tension of the ink.
【００１２】[0012]
【発明の効果】２段階電鋳により、ノズル板の形成を行
なうことにより、ノズル孔辺面の撥水性及びノズル孔内
壁の親水性が得られるため、表面処理工程が省けると共
に、親水性の高い金属層と撥水性の高い金属層との境界
が容易に安定してノズル孔端に形成されるため、ノズル
孔間のばらつきも抑えられ、インクだれや気泡混入のな
い、信頼性の高いインクジェットプリントヘッド用ノズ
ル板を得る事ができる。EFFECTS OF THE INVENTION By forming a nozzle plate by two-step electroforming, water repellency on the side surface of the nozzle hole and hydrophilicity on the inner wall of the nozzle hole can be obtained, so that the surface treatment step can be omitted and the hydrophilicity is high. Since the boundary between the metal layer and the metal layer with high water repellency is easily and stably formed at the nozzle hole edge, variation between nozzle holes is suppressed, and ink dripping and air bubble mixing do not occur, and highly reliable inkjet printing A nozzle plate for head can be obtained.
【図１】本発明によるノズル板の製造過程を示す断面図
である。FIG. 1 is a cross-sectional view showing a process of manufacturing a nozzle plate according to the present invention.
【図２】本発明によるノズル板の製造過程を示す斜視図
である。FIG. 2 is a perspective view showing a process of manufacturing a nozzle plate according to the present invention.
【図３】本発明によるノズル板を組み込んだインクジェ
ットプリントヘッドの平面断面図である。FIG. 3 is a cross-sectional plan view of an inkjet printhead incorporating a nozzle plate according to the present invention.
【図４】メニスカスがノズル孔内へ引き込まれる様子を
示す断面図である。FIG. 4 is a cross-sectional view showing how a meniscus is drawn into a nozzle hole.
【図５】メニスカスがノズル孔端面に固定している様子
を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which a meniscus is fixed to an end surface of a nozzle hole.
【図６】従来の表面処理工程を示す断面図である。FIG. 6 is a cross-sectional view showing a conventional surface treatment process.
【図７】従来の表面処理工程を示す断面図である。FIG. 7 is a cross-sectional view showing a conventional surface treatment process.
【図８】従来の表面処理工程を示す断面図である。FIG. 8 is a cross-sectional view showing a conventional surface treatment process.
１ インクジェットプリントヘッド ２ ノズル孔 ３ インク ４ メニスカス ５ ノズル孔内壁 ６ ノズル孔辺面 ７ 撥水皮膜 ８ ガス ９ スプレーコート １０ マスク １１ レジスト １２ 真鍮基板 １３ 撥水性の高い金属層 １４ 親水性の高い金属層 １５ ノズル板 １６ チャネル内壁 1 Inkjet print head 2 Nozzle hole 3 Ink 4 Meniscus 5 Nozzle hole inner wall 6 Nozzle hole side surface 7 Water repellent film 8 Gas 9 Spray coat 10 Mask 11 Resist 12 Brass substrate 13 High water repellent metal layer 14 Highly hydrophilic metal layer 15 nozzle plate 16 channel inner wall
Claims (1)
て、ノズル孔内壁に親水性の高い金属を用いて電鋳によ
り２層に形成することを特徴とするインクジェットプリ
ントヘッド用ノズル板。1. A nozzle plate for an ink jet print head, characterized in that a metal having a high water repellency is used for a side surface of a nozzle hole and a metal having a high hydrophilic property is used for an inner wall of the nozzle hole to form two layers by electroforming. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21745992A JPH0640040A (en) | 1992-07-24 | 1992-07-24 | Nozzle plate for ink-jet printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21745992A JPH0640040A (en) | 1992-07-24 | 1992-07-24 | Nozzle plate for ink-jet printing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0640040A true JPH0640040A (en) | 1994-02-15 |
Family
ID=16704566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21745992A Pending JPH0640040A (en) | 1992-07-24 | 1992-07-24 | Nozzle plate for ink-jet printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640040A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0945272A2 (en) | 1998-03-27 | 1999-09-29 | Nec Corporation | Print head for an ink jet printer |
| US6270212B1 (en) | 1998-03-27 | 2001-08-07 | Nec Corporation | Print head for an ink jet printer |
| US8191993B2 (en) | 2007-06-21 | 2012-06-05 | Ricoh Company, Ltd. | Nozzle plate for liquid ejector head, liquid ejector head, liquid ejector, liquid ejection method, inkjet recording apparatus, and inkjet recording method |
-
1992
- 1992-07-24 JP JP21745992A patent/JPH0640040A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0945272A2 (en) | 1998-03-27 | 1999-09-29 | Nec Corporation | Print head for an ink jet printer |
| US6270212B1 (en) | 1998-03-27 | 2001-08-07 | Nec Corporation | Print head for an ink jet printer |
| US8191993B2 (en) | 2007-06-21 | 2012-06-05 | Ricoh Company, Ltd. | Nozzle plate for liquid ejector head, liquid ejector head, liquid ejector, liquid ejection method, inkjet recording apparatus, and inkjet recording method |
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