JPS61272168A - Thermal head - Google Patents
Thermal headInfo
- Publication number
- JPS61272168A JPS61272168A JP11614185A JP11614185A JPS61272168A JP S61272168 A JPS61272168 A JP S61272168A JP 11614185 A JP11614185 A JP 11614185A JP 11614185 A JP11614185 A JP 11614185A JP S61272168 A JPS61272168 A JP S61272168A
- Authority
- JP
- Japan
- Prior art keywords
- layer film
- sub
- resistance value
- heat
- resistance region
- 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.)
- Granted
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】
（イ）産業上の利用分野
この発明は、ドツトプリンタにおけるサーマルヘッドに
関し、特に発熱抵抗体の構造に係るものである。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a thermal head in a dot printer, and particularly to the structure of a heating resistor.
（ロ）従来の技術
一般に、ドツトプリンタにおけるサーマルヘッドは、第
３図に示すように、ＡＮｚＯ：＋セラミック基板ａの上
面に対なる導体電極す、ｃが所定間隔を存し、且つ相対
峙して形成されると共に、側導体電極す、ｃ間に亘って
発熱抵抗体ｄが印刷焼成され、この発熱抵抗体ｄの表面
−保護膜ｅが形成されて構成されている。そして、側導
体電極ｂ、Ｃ間に電流を流して発熱抵抗体ｄを発熱させ
、この抵抗体ｄを感熱紙に接触させて印刷するようにし
ている。(b) Conventional technology In general, as shown in FIG. 3, a thermal head in a dot printer has conductor electrodes S and C facing each other on the upper surface of an ANzO: At the same time, a heat generating resistor d is printed and fired between the side conductor electrodes S and C, and a protective film e is formed on the surface of the heat generating resistor d. Then, a current is passed between the side conductor electrodes b and C to cause the heating resistor d to generate heat, and this resistor d is brought into contact with thermal paper for printing.
（ハ）発明が解決しようとする問題点
上述したサーマルヘッドにおいて、従来、発熱抵抗体ｄ
は抵抗値が全体にほぼ均一な抵抗ペーストを用いて印刷
焼成している。従って、発熱抵抗体ｄは下面から表面に
亘り全体にほぼ均一に電流が流れ、全体に亘って均一に
発熱するように構成されていた。(c) Problems to be Solved by the Invention In the above-mentioned thermal head, the heating resistor d
is printed and fired using a resistive paste whose resistance value is almost uniform throughout. Therefore, the heating resistor d was constructed so that a current flows almost uniformly throughout the entirety from the bottom surface to the front surface, and heat is generated uniformly over the entirety.
しかしながら、印字効率を上げるためには、発熱抵抗体
ｄの表面が早期に発熱することが好ましく、表面が低抵
抗値であることが望ましい。従って、上述の発熱抵抗体
ｄでは、均一に電流が流れて均一に発熱するので、熱効
率が悪く、印字効率が悪いという問題があった。However, in order to increase printing efficiency, it is preferable that the surface of the heating resistor d generates heat quickly, and it is desirable that the surface has a low resistance value. Therefore, in the heating resistor d described above, current flows uniformly and heat is generated uniformly, so there is a problem that thermal efficiency is poor and printing efficiency is poor.
この発明は、上記に鑑み、表面層により電流が流れ、印
字効率の良いサーマルヘッドを提供することを目的とし
ている。In view of the above, an object of the present invention is to provide a thermal head that allows current to flow through the surface layer and has good printing efficiency.
（ニ）問題点を解決するための手段及び作用この発明は
、基板上に導体が間隔を存して形成されると共に、導体
間に亘って発熱抵抗体が形成され、この発熱抵抗体を、
表面に至る第１の抵抗領域と、第１の抵抗領域より抵抗
値の大きい第２の抵抗領域とで構成してなり、発熱抵抗
体の表面側に電流が流れるようにしたものである。(d) Means and operation for solving the problem In the present invention, conductors are formed on a substrate at intervals, and a heating resistor is formed between the conductors, and the heating resistor is
It is composed of a first resistance region extending to the surface and a second resistance region having a higher resistance value than the first resistance region, so that a current flows toward the surface side of the heating resistor.
（ホ）実施例
以下、この発明の一実施例を図面に基づいて詳細に説明
する。(E) Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.
第１図及び第２図に示すように、１はドツトプリンタに
おけるサーマルヘッドであって、基板２上の発熱抵抗体
３を発熱させて感熱紙に印刷するものである。As shown in FIGS. 1 and 2, reference numeral 1 denotes a thermal head in a dot printer, which generates heat from a heating resistor 3 on a substrate 2 to print on thermal paper.
このサーマルヘッド１の基板２はＡｌア０３セラミック
基板で構成され、この基板２上には導体パターン４と発
熱抵抗体３とが形成されている。A substrate 2 of this thermal head 1 is composed of an AlA03 ceramic substrate, and a conductor pattern 4 and a heating resistor 3 are formed on the substrate 2.
この導体パターン４は、１個の共通電極５ （導体電極
）と、この共通電極５に対となる複数個の個別電極６
（導体電極）とより構成されている。この両電極５．６
は所定間隔を存し、且つ相対峙して形成され、所定電圧
が印加されるように成っている。This conductor pattern 4 includes one common electrode 5 (conductor electrode) and a plurality of individual electrodes 6 that are paired with this common electrode 5.
(conductor electrode). Both electrodes 5.6
are formed facing each other at a predetermined interval, and are configured to be applied with a predetermined voltage.
発熱抵抗体３は、下層膜７ （第２の抵抗領域）と表層
膜８（第１の抵抗領域）とより構成され、共通電極５と
個別電極６に亘って形成されている。The heating resistor 3 is composed of a lower layer film 7 (second resistance region) and a surface layer film 8 (first resistance region), and is formed over the common electrode 5 and the individual electrodes 6.
下層膜７は所定の抵抗値を備えた抵抗体であり、従来よ
り一般的に用いられている発熱抵抗体と同様な抵抗体で
形成され、基板２上に両電極５．６に亘って形成されて
いる。表層膜８は、下層膜７の表面（上面）に積層形成
されており、下層膜７よりも抵抗値が小さく構成されて
いる。この表層膜８は、高融沸点金属が望ましく、例え
ばルテニウム（Ｒｕ）、タングステン（Ｗ）、ジルコン
（Ｚｒｓｉｏ４）などで、特に酸化物となっても導電性
を有するルテニウム（Ｒｕ）が好ましい。そして、この
発熱抵抗体３の表面には、保護膜９が被覆されている。The lower layer film 7 is a resistor having a predetermined resistance value, and is formed of a resistor similar to a heating resistor commonly used in the past, and is formed on the substrate 2 over both electrodes 5.6. has been done. The surface layer film 8 is laminated on the surface (upper surface) of the lower layer film 7, and has a smaller resistance value than the lower layer film 7. This surface layer film 8 is preferably made of a metal with a high melting boiling point, such as ruthenium (Ru), tungsten (W), or zircon (Zrsio4), and in particular, ruthenium (Ru), which has conductivity even in the form of an oxide, is preferable. The surface of this heating resistor 3 is coated with a protective film 9.
次に、このサーマルヘッド１の作成並びに作用について
説明する。Next, the preparation and operation of this thermal head 1 will be explained.
先ず、Ａｇ２Ｏ，セラミック基板２上に導体パターン４
を印刷焼成し、パターンエツチングにより共通電極５及
び個別電極６を形成する。続いて、両電極５．６間に、
所定抵抗値の抵抗ペーストを印刷焼成して下層膜７を形
成する。この下層膜７の表面にルテニウム（Ｒｕ）など
の金属をスパッタリング等で蒸着し、焼成炉で焼成し、
下層膜７に拡散（侵入）させて表層膜８を形成する。こ
の表層膜８は、焼成温度並びに下層膜７の厚さを適宜選
択することにより、下層膜７表面に形成される。そして
最後に、保護膜９を形成し、作成が完了する。First, a conductor pattern 4 is formed on an Ag2O ceramic substrate 2.
The common electrode 5 and the individual electrodes 6 are formed by printing and firing and pattern etching. Next, between both electrodes 5.6,
The lower layer film 7 is formed by printing and baking a resistor paste having a predetermined resistance value. A metal such as ruthenium (Ru) is deposited on the surface of this lower layer film 7 by sputtering or the like, and fired in a firing furnace.
The surface layer film 8 is formed by diffusing (invading) the lower layer film 7 . This surface layer film 8 is formed on the surface of the lower layer film 7 by appropriately selecting the firing temperature and the thickness of the lower layer film 7. Finally, a protective film 9 is formed to complete the production.
この両電極５．６間に電圧を印加し、発熱抵抗体３に電
流を流すと発熱することになる。その際、表層膜８の抵
抗値が下層膜７より小さいので、表層膜８は電流が流れ
易く、発熱し易くなる。そして、この表層膜８に感熱紙
が接触して、所定の印刷が行われる。When a voltage is applied between both electrodes 5 and 6 and a current is passed through the heating resistor 3, heat is generated. At this time, since the resistance value of the surface layer film 8 is smaller than that of the lower layer film 7, current easily flows through the surface layer film 8, making it easier to generate heat. Then, thermal paper comes into contact with this surface layer film 8, and predetermined printing is performed.
尚、この実施例においては、片方の導体電極を共通電極
５としたが、導体パターン４のパターンは実施例に限ら
れないことは勿論である。また、上記表層膜８をスクリ
ーン印刷で下層膜７の上に積層形成してもよい。In this embodiment, one of the conductor electrodes is the common electrode 5, but it goes without saying that the pattern of the conductor pattern 4 is not limited to that of the embodiment. Further, the surface layer film 8 may be laminated and formed on the lower layer film 7 by screen printing.
（へ）発明の効果
以上のように、この発明のサーマルヘッドによれば、表
面に至る第１の抵抗領域の抵抗値を小さくしたために、
発熱抵抗体の表面側に電流が多く流れ、表層部分が早く
発熱する。従って、全体が均一な抵抗値の領域で構成し
たものと比べ、印字効率が格段に向上する。(F) Effects of the Invention As described above, according to the thermal head of the present invention, since the resistance value of the first resistance region extending to the surface is reduced,
More current flows toward the surface of the heating resistor, and the surface layer generates heat faster. Therefore, printing efficiency is significantly improved compared to a configuration in which the entire area has a uniform resistance value.
第１図及び第２図は、この発明の一実施例を示し、第１
図は、サーマルヘッドの平面図、第２図は、第１図ｎ−
ｎ線における断面図、第３図は、従来のサーマルヘッド
の断面図である。
１：サーマルヘッド、２：基板、
３：発熱抵抗体、 ４：導体パターン、５：共通電極
、 ６：個別電極、７：下層膜、 ８：
表層膜。FIG. 1 and FIG. 2 show one embodiment of the present invention.
The figure is a plan view of the thermal head, and Figure 2 is Figure 1 n-
A cross-sectional view taken along the n-line, FIG. 3, is a cross-sectional view of a conventional thermal head. 1: Thermal head, 2: Substrate, 3: Heat generating resistor, 4: Conductor pattern, 5: Common electrode, 6: Individual electrode, 7: Lower layer film, 8:
Surface membrane.
Claims (1)
導体間に亘って発熱抵抗体が形成され、この発熱抵抗体
を表面に至る第１の抵抗領域と、第１の抵抗領域より抵
抗値の大きい第２の抵抗領域とで構成したサーマルヘッ
ド。(1) Conductors are formed at intervals on the substrate, and
A thermal head in which a heating resistor is formed between conductors, and the heating resistor is composed of a first resistance region reaching the surface and a second resistance region having a higher resistance value than the first resistance region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60116141A JPH0717070B2 (en) | 1985-05-28 | 1985-05-28 | Thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60116141A JPH0717070B2 (en) | 1985-05-28 | 1985-05-28 | Thermal head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61272168A true JPS61272168A (en) | 1986-12-02 |
| JPH0717070B2 JPH0717070B2 (en) | 1995-03-01 |
Family
ID=14679756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60116141A Expired - Fee Related JPH0717070B2 (en) | 1985-05-28 | 1985-05-28 | Thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0717070B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5321234A (en) * | 1992-03-26 | 1994-06-14 | Rohm Co., Ltd. | Linear heater |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52117642A (en) * | 1976-03-29 | 1977-10-03 | Toshiba Corp | Heat-sensitive recording head |
-
1985
- 1985-05-28 JP JP60116141A patent/JPH0717070B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52117642A (en) * | 1976-03-29 | 1977-10-03 | Toshiba Corp | Heat-sensitive recording head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5321234A (en) * | 1992-03-26 | 1994-06-14 | Rohm Co., Ltd. | Linear heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0717070B2 (en) | 1995-03-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |