JPS61293869A - Thermal head - Google Patents
Thermal headInfo
- Publication number
- JPS61293869A JPS61293869A JP13420985A JP13420985A JPS61293869A JP S61293869 A JPS61293869 A JP S61293869A JP 13420985 A JP13420985 A JP 13420985A JP 13420985 A JP13420985 A JP 13420985A JP S61293869 A JPS61293869 A JP S61293869A
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- conductive layer
- layer
- heat generating
- heating part
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ワードプロセッサやファクシミリ等の記録出
力装置に用いられるサーマルヘッドに関し、特に熱転写
インクリボンを介して記録紙に記録するのに好適に用い
られるサーマルヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal head used in a recording/output device such as a word processor or a facsimile, and is particularly suitable for use in recording on recording paper via a thermal transfer ink ribbon. Regarding the thermal head used.
第1図の平面図と第2図の断面図で示したようなサーマ
ルヘッドは知られている。A thermal head as shown in the plan view of FIG. 1 and the sectional view of FIG. 2 is known.
図において、1はAI板等から成る放熱基板、2は放熱
基板1に固定されたアルミナ等のセラミックス板から成
るサーマルヘッド基板、3はサーマルヘッド基板2上に
5i02を主成分とするガラス粉末のスクリーン印刷を
行って、700〜800℃、で焼成して形成したグレー
ズ層、4はマスキング−によるバターニングとTa2N
等のスパッタもしくは電子ビーム蒸着とによってグレー
ズ層3上に例えば24個を配列して形成した発熱体層、
5および6は対向している間が発熱体層4によって接続
されるようにパターニングとA1等のスパッタまたは蒸
着によって形成した信号電極および共通電極、7はTa
205 + Al2O5あるいはSiN等のスパッタに
よって少くとも電極5,6が対向して両電極間を発熱体
J14が接続している発熱部Hの表面を被覆するように
設けた絶縁性の保護層、8は両電極5,6間に信号電圧
を選択的に印加する図示してない制御部と接続するため
に所謂ビームリード方式等でそれぞれ信号電極5と共通
電極6に接続して設けたポンディングパッドである。な
お、通常、グレーズ層3は盛り上り部分の厚さ40μm
程度、発熱体層4は厚さ500X程度、信号電極5およ
び共通電極6は厚さ1〜2μm程度、保゛護層7は例え
ばSiO2とTa205の層から成るものでは5i02
の厚さ5000 X程度とTa205の厚さ5 pm
程度に形成される。In the figure, 1 is a heat dissipation board made of an AI board etc., 2 is a thermal head board made of a ceramic plate such as alumina fixed to the heat dissipation board 1, and 3 is a glass powder mainly composed of 5i02 on the thermal head board 2. Glaze layer formed by screen printing and baking at 700-800℃, 4 is buttering by masking and Ta2N
A heating element layer formed by arranging, for example, 24 pieces on the glaze layer 3 by sputtering or electron beam evaporation,
5 and 6 are signal electrodes and common electrodes formed by patterning and sputtering or evaporation of A1 or the like so that the opposing sides are connected by the heating element layer 4; 7 is Ta.
205 + An insulating protective layer formed by sputtering of Al2O5 or SiN or the like to cover the surface of the heat generating part H, where at least the electrodes 5 and 6 face each other and the heat generating element J14 is connected between the two electrodes, 8 are bonding pads connected to the signal electrode 5 and the common electrode 6 by a so-called beam lead method or the like in order to connect to a control unit (not shown) that selectively applies a signal voltage between the electrodes 5 and 6. It is. Note that the glaze layer 3 usually has a thickness of 40 μm at the raised portion.
The heating element layer 4 has a thickness of about 500X, the signal electrode 5 and the common electrode 6 have a thickness of about 1 to 2 μm, and the protective layer 7 is, for example, 5i02 when made of layers of SiO2 and Ta205.
The thickness of Ta205 is about 5000X and the thickness of Ta205 is 5 pm.
Formed to a certain degree.
以上のような従来のサーマルヘッドを熱転写用接触によ
って両者に静電気が発生し、そのためにリボンRやサー
マルヘッドの走行が円滑に行われなくなったシ、故障が
生じたりすることがある。When the conventional thermal head as described above comes into contact for thermal transfer, static electricity is generated between the two, which may prevent the ribbon R and the thermal head from running smoothly or cause a malfunction.
この静電気による問題を解消するためK、第3図に示し
たようにサーマルヘッド基板2のリボンRが走行する方
向の両端側に導電性樹脂の除電部9を設けるようにした
ものが特開昭60−38176号公報によシ知られてい
る。なお、第2図、第3図に一点鎖線で示したPはリボ
ンRから熱転写印字される記録紙である。In order to solve this problem caused by static electricity, as shown in FIG. 3, a static eliminator 9 made of conductive resin is provided at both ends of the thermal head board 2 in the direction in which the ribbon R runs. It is known from the publication No. 60-38176. Note that P indicated by a dashed line in FIGS. 2 and 3 is a recording paper on which thermal transfer printing is performed from the ribbon R.
第3図に示したような導電性樹脂の除電部9を設けたサ
ーマルヘッドは、除電部9にリボンRが接触することに
よシリポン只の帯電を除去するものであるが、リボンR
とサーマルヘッドの走行性に導電性樹脂の表面状態が大
きく関係して、リボンRが蛇行したシ、記録紙Pとリボ
ンRが走行する際にリボンRがヘッドに引掛って、記録
紙Pとリボン只の間にスリップしたシし易い。また、第
2図あるいは第3図でサーマルヘッド基板2の位置を左
端が共通基板1の左端と殆んど一致するようにずらした
、そして発熱部HのリボンRや記録紙Pに対する密着性
を上げると共にリボンRの記録紙Pからの分離角を大き
くできるようにした、それKよって荒紙に対しても鮮明
な記録を行い得る、最近のエツジタイプのサーマルヘッ
ドにあっては、第3図の左側の除電部9を設けることが
できず、右側の除電部9だけでは、発熱部Hの密着性が
高められて帯電し易くなることもあり、発熱部表面保護
層等の帯電によってリボンRが記録紙Pから浮き上シ搦
まることかある。A thermal head equipped with a static eliminator 9 made of conductive resin as shown in FIG. 3 removes static electricity from the ribbon R by contacting the static eliminator 9 with the ribbon R.
The surface condition of the conductive resin has a large influence on the running performance of the thermal head, and the ribbon R may meander, and when the recording paper P and ribbon R run, the ribbon R may get caught on the head, causing the recording paper P and Easy to slip between ribbons. In addition, in FIG. 2 or 3, the position of the thermal head substrate 2 is shifted so that the left end almost coincides with the left end of the common substrate 1, and the adhesion of the heat generating part H to the ribbon R and the recording paper P is improved. In recent edge-type thermal heads, the angle of separation of the ribbon R from the recording paper P can be increased as well as the separation angle of the ribbon R from the recording paper P, and thus it is possible to record clearly even on rough paper. If the static eliminator 9 on the left side cannot be provided and only the static eliminator 9 on the right side is used, the adhesion of the heat generating part H may be increased and the ribbon R may be easily charged due to charging of the heat generating part surface protective layer, etc. Sometimes the paper may float up from the recording paper P.
導電性樹脂で除電部9を設ける代りに、放熱基板1の形
状を一体に除電部を有する形状とすることも行われるが
、静電気によるトラブルを十分には解消できないことに
ついては導電性樹脂で除電部9を設けたものと変らない
。Instead of providing the static eliminator 9 with conductive resin, the shape of the heat dissipation board 1 may be made to have a static eliminator integrally, but if the trouble caused by static electricity cannot be fully resolved, static eliminator 9 with conductive resin may be used. It is no different from the one with section 9 provided.
本発明は、上述のような従来のサーマルヘッドにおける
問題を解消するためになされたものであり、発熱部が端
にあるエツジタイプか中央部にあるタイプかに拘らず、
静電気によるトラブルや熱転写インクリボンの引掛り等
が発生することのないサーマルヘッドの提供を目的とし
てなされたものである。The present invention was made to solve the above-mentioned problems with conventional thermal heads, and regardless of whether the heat generating part is an edge type or a type in which the heat generating part is located in the center,
The purpose of this invention is to provide a thermal head that does not cause problems due to static electricity or the thermal transfer ink ribbon gets caught.
本発明は、1!極が対向し、対向電極間が発熱体層で接
続されて発熱部を形成したサーマルへラドにおいて、該
発熱部の表面が絶縁性保麺層で被覆されていて、該絶縁
性保護層上に導電層が設けられていることを特徴とする
サーマルヘッドにあり、この構成によって上記目的を達
成する。The present invention has 1! In a thermal heater in which the electrodes face each other and the opposing electrodes are connected by a heating element layer to form a heating part, the surface of the heating part is covered with an insulating noodle-retaining layer, and on the insulating protective layer. The thermal head is characterized by being provided with a conductive layer, and this structure achieves the above object.
以下1本発明を第4図の平面図と第5図の断面図で示し
た実施例によって説明する。The present invention will be explained below with reference to an embodiment shown in a plan view in FIG. 4 and a sectional view in FIG.
第4図と第5図における第1図乃至第3図と同一符号は
同一機能部材を示しておシ、保護層7の形成までは第1
図、第2図に示したサーマルヘッドにおけると変らない
。本発明のサーマルヘッドは、さらに保護層7の上に、
少くとも発熱部Hの表面の一部を被覆するように、導を
層IOを設けたものである。導電層10は、例えばメタ
ルマスクを用い、蒸着またはスパッタによp htやO
rのような金属、シリコンやGeのような半導体、酸化
インジウムのような金属酸化物を100X〜1μm、好
ましくは20001程度の厚さに保護層7に付着させて
形成される。この導電層10の好ましい厚さは、耐摩耗
性と発熱部Hの熱効率の点から求められたものである。The same reference numerals as in FIGS. 1 to 3 in FIGS. 4 and 5 indicate the same functional members.
This is the same as in the thermal head shown in FIGS. The thermal head of the present invention further includes, on the protective layer 7,
A conductive layer IO is provided so as to cover at least a part of the surface of the heat generating part H. The conductive layer 10 is formed by evaporation or sputtering using, for example, a metal mask.
The protective layer 7 is formed by depositing a metal such as R, a semiconductor such as silicon or Ge, or a metal oxide such as indium oxide to a thickness of 100× to 1 μm, preferably about 20,001 μm. The preferred thickness of the conductive layer 10 is determined from the viewpoints of wear resistance and thermal efficiency of the heat generating portion H.
そして、導電層10を図示のように発熱部Hの表面より
も十分に広く設けると、それだけでも発熱部Hや熱転写
インクリボンR等の帯電電位が下って静電気によるトラ
ブルの発生が減少すると言う効果が得られる。しかし、
導電層10を例えば釧ペーストを用いるなどして放電基
板IVCアースしたりすると、静電気によるトラブルの
発生防止効果は一層向上する。また、例えば、共通電極
6にリボンRの帯電極性と同極性のSOV程度までの電
圧が印加され、信号電極5が選択的にオン、オフされて
発熱体層4の発熱が行゛われるようなサーマルヘッドに
あっては、保護層7に共通電極6に達するコンタクトホ
ールな形成して、コンタクトホールによって導電層10
を共通電極6に接続し、導電層lOに正または負の電圧
を印加するようにすると、別に電源を設けることなく効
果的に静電気によるトラブルの発生を防止できる。導電
層10に正または負の電圧を印加する場合は、50V程
度までの電圧、好ましくは15Vまでの電圧とするのが
よい。If the conductive layer 10 is provided sufficiently wider than the surface of the heat generating part H as shown in the figure, the charging potential of the heat generating part H, the thermal transfer ink ribbon R, etc. will be lowered, and the occurrence of troubles due to static electricity will be reduced. is obtained. but,
If the conductive layer 10 is grounded to the discharge substrate IVC using, for example, a paste, the effect of preventing troubles caused by static electricity will be further improved. Further, for example, a voltage up to about SOV having the same polarity as the charging polarity of the ribbon R is applied to the common electrode 6, the signal electrode 5 is selectively turned on and off, and the heat generating layer 4 is heated. In the thermal head, a contact hole is formed in the protective layer 7 to reach the common electrode 6, and the conductive layer 10 is connected to the conductive layer 10 by the contact hole.
By connecting the conductive layer 10 to the common electrode 6 and applying a positive or negative voltage to the conductive layer 10, troubles caused by static electricity can be effectively prevented without providing a separate power source. When applying a positive or negative voltage to the conductive layer 10, the voltage is preferably up to about 50V, preferably up to 15V.
導電層10は必ずしも発熱部Hの全面を被覆していカく
てもよい。すなわち、発熱部Hの全面を被覆する導電層
10が長期間の使用によって最も熱転写インクリボンR
に接する部分が摩滅してしまっても、なお除電効果が余
り損われないことが確められている。The conductive layer 10 does not necessarily have to cover the entire surface of the heat generating part H. That is, the conductive layer 10 covering the entire surface of the heat generating part H becomes the most thermal transfer ink ribbon R after long-term use.
It has been confirmed that even if the parts in contact with the ion are worn away, the static elimination effect is not significantly impaired.
本発明によれば1発熱部や熱転写インクリボン等の帯電
が効果的に抑制されて、静電気等によるリボンやヘッド
の走行異常あるいは放電ノイズによる記録の誤作動等が
生ずることが無くなる。そして本発明は、発熱部を中央
部に設けたサーマルヘッドにも、発熱部を端に設けたサ
ーマルヘッドにも適用でき、そして、図示例のような縦
一列印字方式のシリアル方式サーマルヘッドに限らず、
発熱体層がマトリックス状に配置された桁逐次印字方式
のサーマルヘッドにも、あるいはヘッドを固定した状態
で記録するライン方式のサーマルヘッドにも適用できる
。According to the present invention, charging of the heat generating portion, the thermal transfer ink ribbon, etc. is effectively suppressed, and there is no possibility of abnormal running of the ribbon or head due to static electricity or the like, or malfunction of recording due to discharge noise. The present invention can be applied to a thermal head in which the heat generating part is provided in the center or a thermal head in which the heat generating part is provided at the end, and is limited to a serial type thermal head with a vertical single line printing method as shown in the example. figure,
It can be applied to a digit sequential printing type thermal head in which the heating layer is arranged in a matrix, or to a line type thermal head in which recording is performed with the head fixed.
さらに本発明のサーマルヘッドは、熱転写用に限らず、
感熱紙への記録用としても安定した記録や感熱紙の送り
等がなされることで相当の効果を奏する。Furthermore, the thermal head of the present invention is not limited to use for thermal transfer.
Even when used for recording on thermal paper, considerable effects can be achieved by stable recording and feeding of thermal paper.
第1図は従来のサーマルヘッドの例を示す平面図、第2
図は第1図のX−X矢視断面図、第3図は従来のサーマ
ルヘッドの他の例を示す側面図、第4図および第5図は
本発明サーマルヘッドの例を示す平面図およびX−X矢
視断面図である。
1・・・共通基板、 2・・・絶縁基板、3・
・・グレーズ層、 4・・・発熱体層、5・・・
信号電極、 6・・・共通電極、?・・・保護
層、 10・・・導を層。
特許出願人 小西六写真工業株式会社第f図Figure 1 is a plan view showing an example of a conventional thermal head, Figure 2 is a plan view showing an example of a conventional thermal head.
The figure is a sectional view taken along the line X-X in FIG. 1, FIG. 3 is a side view showing another example of the conventional thermal head, and FIGS. It is a sectional view taken along the line X-X. 1... Common board, 2... Insulating board, 3...
...Glaze layer, 4...Heating element layer, 5...
Signal electrode, 6... common electrode, ? ...Protective layer, 10... Conductive layer. Patent applicant Konishiroku Photo Industry Co., Ltd. Figure f
Claims (3)
て発熱部を形成したサーマルヘッドにおいて、該発熱部
の表面が絶縁性保護層で被覆されていて、該絶縁性保護
層上に導電層が設けられていることを特徴とするサーマ
ルヘッド。(1) In a thermal head in which electrodes face each other and the opposing electrodes are connected by a heat generating layer to form a heat generating part, the surface of the heat generating part is covered with an insulating protective layer, and the surface of the heat generating part is covered with an insulating protective layer. A thermal head characterized in that a conductive layer is provided on the surface of the thermal head.
範囲第1項記載のサーマルヘッド。(2) The thermal head according to claim 1, wherein the conductive layer is used while being grounded.
れる特許請求の範囲第1項記載のサーマルヘッド。(3) The thermal head according to claim 1, which is used by applying a positive or negative voltage to the conductive layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13420985A JPS61293869A (en) | 1985-06-21 | 1985-06-21 | Thermal head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13420985A JPS61293869A (en) | 1985-06-21 | 1985-06-21 | Thermal head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61293869A true JPS61293869A (en) | 1986-12-24 |
Family
ID=15122969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13420985A Pending JPS61293869A (en) | 1985-06-21 | 1985-06-21 | Thermal head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61293869A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62121945U (en) * | 1986-01-24 | 1987-08-03 | ||
JPS63193853A (en) * | 1987-02-05 | 1988-08-11 | Mitsubishi Electric Corp | Thermal head |
JPH02150365A (en) * | 1988-12-01 | 1990-06-08 | Mitsubishi Electric Corp | Thermal head and production thereof |
JPH0479646U (en) * | 1990-11-21 | 1992-07-10 | ||
US8063926B2 (en) * | 2008-08-29 | 2011-11-22 | Canon Kabushiki Kaisha | Thermal head and thermal printer |
-
1985
- 1985-06-21 JP JP13420985A patent/JPS61293869A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62121945U (en) * | 1986-01-24 | 1987-08-03 | ||
JPH0644696Y2 (en) * | 1986-01-24 | 1994-11-16 | 日本電気株式会社 | Thermal head |
JPS63193853A (en) * | 1987-02-05 | 1988-08-11 | Mitsubishi Electric Corp | Thermal head |
JPH02150365A (en) * | 1988-12-01 | 1990-06-08 | Mitsubishi Electric Corp | Thermal head and production thereof |
JPH0479646U (en) * | 1990-11-21 | 1992-07-10 | ||
US8063926B2 (en) * | 2008-08-29 | 2011-11-22 | Canon Kabushiki Kaisha | Thermal head and thermal printer |
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