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JPS6021264A - Electrode structure of thermal printer head - Google Patents

Electrode structure of thermal printer head

Info

Publication number
JPS6021264A
JPS6021264A JP58129971A JP12997183A JPS6021264A JP S6021264 A JPS6021264 A JP S6021264A JP 58129971 A JP58129971 A JP 58129971A JP 12997183 A JP12997183 A JP 12997183A JP S6021264 A JPS6021264 A JP S6021264A
Authority
JP
Japan
Prior art keywords
conductor layer
thickness
protective film
conductor
layer
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
JP58129971A
Other languages
Japanese (ja)
Inventor
Zen Sadai
定井 「さとる」
Kazuhisa Matsumoto
和久 松本
Kazuo Ogata
一雄 緒方
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 JP58129971A priority Critical patent/JPS6021264A/en
Publication of JPS6021264A publication Critical patent/JPS6021264A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315Typewriters 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
    • B41J2/32Typewriters 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
    • B41J2/335Structure of thermal heads

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To eliminate the release of a protective layer, by providing a relatively thin first good conductor layer, a second conductor layer, a relatively thick good conductor layer and a fourth conductor layer onto a heat generating resistor having the protective layer formed to the upper surface thereof. CONSTITUTION:A glass glaze layer 1a with a thickness of about 40mum is partially formed on an alumina substrate 1 by printing and baking and a heat generating resistor 2 comprising nichrome is formed thereon in a thickness of 0.2mum by vapor deposition. Succeedingly, a first conductor layer 3a with a thickness of 0.2mum comprising copper, a second conductor layer 3b with a thickness of 0.05 mum comprising chromium, a third conductor layer 3c with a thickness of 1.5mum comprising copper and a fourth conductor layer 3d with a thickness of 0.05mum comprising chromium are formed in succession by vapor deposition. In the next step, the above mentioned multi-layered film is subjected to photolithography and dry etching to form exposed part 5, 6 to the part of the glaze layer 1a.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はサーマルプリンターのヘッド、特にその電極の
構造に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a thermal printer head, and in particular to the structure of its electrodes.

従来例の構成とその問題点 サーマルプリントヘッドは一般に第1図に示づように絶
縁性の基板1の表面に抵抗層からイ【る発熱体2を形成
し、この上に導体層3を形成し、これらの発熱体、導体
の微細パターンの1に耐摩耗保護膜4を形成してなるも
のである。
Conventional configuration and problems Thermal print heads generally have a heating element 2 formed from a resistive layer on the surface of an insulating substrate 1, and a conductive layer 3 formed on top of this. However, a wear-resistant protective film 4 is formed on one of the fine patterns of these heating elements and conductors.

最近は、乾電池で駆動できる4ノーマルグリントヘッド
として、低い電圧で働くものが要求されているが、従来
の上記のような構造のり−マルプリントヘッドでは、導
体電極部分が薄く、低電圧大電流では導体部分の不要な
発熱が大さ″く、また電圧降下が大きいための不具合が
生じている。
Recently, there has been a demand for a 4-normal glint head that can be driven by dry batteries and works at low voltage, but in the conventional glue print head with the above structure, the conductor electrode part is thin, and it is difficult to operate at low voltage and high current. Problems occur due to the large amount of unnecessary heat generation in the conductor part and the large voltage drop.

この改善のために導体部分の厚みを厚くりると、上記の
発熱、電圧降下は解消されるのであるが、発熱体の近傍
で導体部分と発熱体部分の間に大さな段差ができ、この
上に耐摩耗保護膜を一面に形成した時、段差部分にクラ
ックが発生し易く、イこから剥離するという不具合が生
じてしまう。
In order to improve this, increasing the thickness of the conductor part eliminates the above heat generation and voltage drop, but a large step is created between the conductor part and the heat generating element near the heating element. When a wear-resistant protective film is formed over the entire surface, cracks are likely to occur at the stepped portions, resulting in problems such as peeling off from the edges.

発明の目的 本発明はこの様な不具合を解消し大さく7電流でも問題
なく駆動できて、しかも保護膜剥離等の生じないサーマ
ルプリントヘッドを提供することを目的とするものであ
る。
OBJECTS OF THE INVENTION It is an object of the present invention to eliminate such problems and provide a thermal print head that can be driven without problems even with a current of about 700 volts and does not cause peeling of the protective film.

発明の構成 本発明は、発熱体近傍の紙のすれる部分は導体膜を薄く
し、ギャップの段差によるクラックから生ずる保護膜の
剥離のないように保護膜との接着性の良い導体をその表
面につけた構造とし、また発熱の不具合に対しては、紙
のすれない部分の導体膜を厚くして抵抗を小さくして発
熱を防ぎ、またその上にも保護膜との接着性の良い導体
をつけた構造にし、これにより、保護膜の剥離のない、
しかも不要な発熱の少い構造となしている。
Structure of the Invention The present invention makes the conductive film thinner in the area where the paper rubs near the heating element, and coats the surface with a conductor that has good adhesion to the protective film to prevent the protective film from peeling off due to cracks caused by the step difference in the gap. In addition, to prevent the problem of heat generation, the conductor film in the areas where the paper does not rub is thickened to reduce resistance and prevent heat generation, and a conductor with good adhesion to the protective film is also added on top of it. With this structure, there is no peeling of the protective film.
Moreover, it has a structure that generates less unnecessary heat.

実施例の説明 以下本発明の一実施例を図面にもとづいて説明する。第
2図において、アルミナの基板1の上に部分的にガラス
グレーズ1aを約40μ亀の厚さに印刷、焼成により形
成し、その上に発熱抵抗体2としてニクロムを0.2μ
m蒸谷により形成す・る。
DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, a glass glaze 1a is partially printed and fired to a thickness of about 40 μm on an alumina substrate 1, and a 0.2 μm layer of nichrome is applied as a heating resistor 2 on top of the glass glaze 1a.
It is formed by a steam valley.

その上に第1の導体3aとして銅を0.5μm1さらに
その上に第2の導体としてクロム3bを0.05μm1
ざらにその上に第3の導体として銅3Gを1.5μ雇、
さらにその上に第4の導体としてクロム3aを0.05
μm1いずれも蒸着により形成する。ここで、第2およ
び第4の導体3bおよび3dは保護膜4と接着性の良い
ものが選ばれている。
On top of that, 0.5 μm of copper is applied as the first conductor 3a, and 0.05 μm of chromium 3b is placed on top of that as the second conductor.
Roughly put 1.5μ of copper 3G as the third conductor on top of it,
Furthermore, 0.05% of chromium 3a is added as a fourth conductor on top of that.
Both μm1 are formed by vapor deposition. Here, the second and fourth conductors 3b and 3d are selected to have good adhesion to the protective film 4.

次に、上記第1〜第4の導体38〜3dよりなる多層膜
を、フォトリゾグラフィとウェブ1へエツチングにより
、発熱抵抗体2が露出する部分5と第2の導体3bが露
出する部分6をガラスグレーズ1aの部分に形成する。
Next, a multilayer film consisting of the first to fourth conductors 38 to 3d is photolithographically etched onto the web 1, so that a portion 5 where the heating resistor 2 is exposed and a portion 6 where the second conductor 3b is exposed. is formed on the glass glaze 1a.

その後に、そのずべての上に保護膜4を5μを形成して
サーマルプリントヘッドとなすものである。
After that, a protective film 4 having a thickness of 5 μm is formed on all of them to form a thermal print head.

この発熱抵抗体2が露出する部分5と第2の導体3bが
露出Jる部分6の上は、紙が摺動し印字する部分である
。この部分については発熱抵抗体2と導体3a 、3b
の部分の境界では0.55μ卯しか段差がないので、5
μの厚みの保護膜4〜にも段差が少く、印字時の摩耗、
機械的衝撃による段差部分での保護膜剥離は発生しない
The area 5 where the heating resistor 2 is exposed and the area 6 where the second conductor 3b is exposed are areas on which the paper slides and prints. For this part, the heating resistor 2 and the conductors 3a and 3b
There is only a 0.55 μm step difference at the boundary of the part, so 5
There are few steps in the protective film 4~ with a thickness of μ, and there is no wear during printing.
The protective film does not peel off at the stepped portion due to mechanical impact.

また、紙のすれない部分は保護膜と導体38〜3dの積
層部分となっているが、この部分では抵抗値が低く、不
要な発熱及び電圧低下が少いので、低電圧、大電流での
駆動ができて乾電池でも駆動が可能である。
In addition, the part where the paper does not rub is the laminated part of the protective film and the conductors 38 to 3d, and this part has a low resistance value, and there is little unnecessary heat generation and voltage drop, so it can be used at low voltages and large currents. It can be driven and can even be powered by dry batteries.

第1と第3の導体3aと30として銅を使用するのは、
比抵抗が非常に小さいからであり、また第2と第4の導
体3bと3dとしてクロムを使用するのは、保護膜に使
用する酸化物等や銅にも付着性が良いためである。また
、導体材料を2種にしておくことで、蒸着、エツチング
がやり易く、安価な製品を市場に提供できる。
The use of copper as the first and third conductors 3a and 30 is because
This is because the specific resistance is very low, and the reason why chromium is used for the second and fourth conductors 3b and 3d is because it has good adhesion to oxides used in the protective film and copper. Furthermore, by using two types of conductor materials, vapor deposition and etching can be easily performed, and inexpensive products can be provided to the market.

発明の効果 以上のように本発明の電極wJ造は、低電圧、大電流で
も電圧低下、不要発熱が少なくそして保護膜の剥離のな
いサーマルヘッドを提供できるものである。
Effects of the Invention As described above, the electrode wJ structure of the present invention can provide a thermal head that has less voltage drop and less unnecessary heat generation even at low voltages and large currents, and does not cause peeling of the protective film.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のサーマルプリントヘッドの断面構造図、
第2図は本発明の一実施例の断面構造図である。 1・・・基板、2・・・抵抗発熱体、3a・〜・3(1
・・・積htj導体、4・・・保護膜 代理人 森 木 義 弘
Figure 1 is a cross-sectional structural diagram of a conventional thermal print head.
FIG. 2 is a cross-sectional structural diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Board, 2... Resistance heating element, 3a...3 (1
...Product htj conductor, 4...Protective film agent Yoshihiro Moriki

Claims (1)

【特許請求の範囲】 1、発熱抵抗体上に形成され、かつ上面に保護膜が形成
される導体が、第1の比較的薄い電気良導体層と、その
上に設けられ、保護膜との接着性が良い第2の導体層と
、さらにその」−に設けられる比較的厚い第3の電気良
導体層と、さらにその上に設けられ、保護膜との接着性
が良い第4の導体層の4層よりなるサーマルプリントヘ
ッドの電極構造。 2、第1、第3の導体どして銅、第2、第4の導体とし
てクロムを使用したことを特徴とする特許請求の範囲第
1項記載のサーマルプリントヘッドの電極構造。
[Claims] 1. A conductor formed on the heating resistor and having a protective film formed on the upper surface is provided on a first relatively thin electrically conductive layer and is bonded to the protective film. a second conductor layer with good electrical conductivity, a relatively thick third conductor layer provided thereon, and a fourth conductor layer provided thereon with good adhesion to the protective film. Electrode structure of a thermal print head consisting of layers. 2. The electrode structure of a thermal print head according to claim 1, wherein copper is used for the first and third conductors, and chromium is used for the second and fourth conductors.
JP58129971A 1983-07-15 1983-07-15 Electrode structure of thermal printer head Pending JPS6021264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58129971A JPS6021264A (en) 1983-07-15 1983-07-15 Electrode structure of thermal printer head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58129971A JPS6021264A (en) 1983-07-15 1983-07-15 Electrode structure of thermal printer head

Publications (1)

Publication Number Publication Date
JPS6021264A true JPS6021264A (en) 1985-02-02

Family

ID=15022958

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58129971A Pending JPS6021264A (en) 1983-07-15 1983-07-15 Electrode structure of thermal printer head

Country Status (1)

Country Link
JP (1) JPS6021264A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907015A (en) * 1987-08-26 1990-03-06 Hitachi, Ltd. Thermal printing head
US6501497B2 (en) * 2000-08-31 2002-12-31 Alps Electric Co., Ltd. Thermal head with small size of steps of protective layer formed on heating portion and manufacturing method thereof
JP2009254919A (en) * 1998-12-18 2009-11-05 Dyson Technology Ltd Robotic vacuum cleaner
US20120212557A1 (en) * 2011-02-23 2012-08-23 Toshimitsu Morooka Thermal head and method of manufacturing the same, and printer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907015A (en) * 1987-08-26 1990-03-06 Hitachi, Ltd. Thermal printing head
JP2009254919A (en) * 1998-12-18 2009-11-05 Dyson Technology Ltd Robotic vacuum cleaner
US6501497B2 (en) * 2000-08-31 2002-12-31 Alps Electric Co., Ltd. Thermal head with small size of steps of protective layer formed on heating portion and manufacturing method thereof
US20120212557A1 (en) * 2011-02-23 2012-08-23 Toshimitsu Morooka Thermal head and method of manufacturing the same, and printer
US8624946B2 (en) * 2011-02-23 2014-01-07 Seiko Instruments Inc. Thermal head, method of manufacturing thermal head, and printer equipped with thermal head

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